TA8800N TOSHIBA | Alldatasheet
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TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC The TA8800N is a PIF/SIF IC built in a complete synchronous detection function with PLL circuit. The IC package has its size reduced by employment of shrink-type 24 pins, contributing to circuit board size reduction. _- - FEATURES. SR —— wi The PIF circuit has the following features : ye Jor F. ' i @ Complete synchronous detection function with PLL circuit 4 It @ 3-stage IF amplifier with variable gain @ Double time constant for AGC filter for faster AGC responses e Ase of peak detection ‘ype SDIP24-P-300-1.78 @ Single-polarity AFT Out voltage Wei ° eight : 1.22g (Typ.) e@ AFT defeat function provided 3 9 MlyP @ Reverse RF AGC supplied to tuner The SIF circuit has the following features : @ IF amplifier with variable gain © Quadrature-type detection circuit @ Use of a ceramic discriminator device makes the SIF circuit adjustment-free. BLOCK DIAGRAM AFT 2nd Video AFT” synchronous Loop Limiter SIF RF AGC 1st AGC Coil AGC Out Out Detection VCO Coil _—Filter In. = Outlay ed) @) @) _@)_ @)_ GG) GD) GD) GD) GD) ee ane LIMITER PETECTION AMPLIFIER ; a + a, SIF FM DETEC- SIF DETEC- RF TION | AGC col [Ly — OO Oo GF OF Oo GF OFC Oo GF VV Y AGC RFAGC PIF PIF In GND SIFin SIF_— Audio. SIF FM Limiter in Out Vice AGC Out — Vcc PEECION yt 9809 10EBA2 ©@ TOSHIBA is continually working to improve the quality and the reliability of its products, Nevertheless, semiconductor devices in general can malfunction or fall due to thei inherent electrical sensitivity and, vulnerability to physical stres. itis the responsibilty of the buyer, when utlizing TOSHIBA products, to observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent products specifications. Also, please keep in mind the precautions and conditions set forth in the TOSHIBA Semiconductor Reliability Handbook. @ The products described in this document are subject to the foreign exchange and foreign trade laws. @ The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others e The information contained herein is subject to change without notice. 1999-03-12 1/21
ae [wwe [oe generates AGC voltage from the Video Out (pin 21) signal. 2 RF AGC Out Tuner AGC voltage output pin. Connect this pin to the tuner. Tuner AGC voltage delay adjustment pin. To this pin, supply DC 13 RF AGC Delay voltage for adjusting the AGC delay. PIF circuit power supply pin. To this pin, supply external DC voltage (9V + 10%). External signals could be mixed into the IC, causing various characteristics to be deteriorated. To prevent it, insert the following
3 PIF Vec trap filters between the external power supply and this pin :
PIF carrier frequency trap filter Horizontal scanning frequency (fy) trap filter In the sample circuits shown in page 12 of this document, the trap filters have inductance 68/H. 5 [fens [RR he ri | input stage is a differential amplifier. The standard input signal level PIF In 2 - is 84dByV. Pleas rmommaramsom circuit has an AGC range of approximately + 10dB. [a _| SIF AGC SIF euit AGC filter pin. Insert @ capacitor between this pin and GND. | Audio signal output pin. The standard output level is 1Vp-p. Supply Audio Out this signal to the de-emphasis circuit. The de-emphasis circuit has the following time constant : 75us for NTSC method, 50us for PAL method Audio detection circuit power supply pin. To this pin, supply external DC voltage (9V+ 10%). External signals could be mixed into the IC, causing various characteristics to be deteriorated. To prevent it, insert the following trap filters between the external power supply and this SIF Vec pin: PIF carrier frequency trap filter Horizontal scanning frequency (fy) trap filter In the sample circuits shown in page 12 of this document, the trap filters have inductance 68/:H. 1999-03-12 2/21
Generate a signal with the phase shifted 90 degrees necessary for FM detection (Audio detection) and supply it to this pin. Insert a capacitor between this pin and Limiter Out (pin 12) and also insert a resonator between this pin and GND. Thus, a phase difference of 90 degrees is generated between pin 12 and this pin. If a ceramic resonator is used, adjustment is not necessary when
1 FM Detection In assembling the FM detection circuit (Audio detection circuit) (that is, it
can made adjustment free). To demodulate multiplexed Audio signals, connect a resistor in parallel to the resonance circuit. It reduces Q of the resonance circuit and expands the frequency band. The Audio muting mode is set under the following conditions : DC voltage at pin 1150.3V. coef fim the Audio muting mode, the pin 12 DC voltage is=4.5V. Amplitude limit circuit output pin. Insert a capacitor between this pin ae and FM Detection In pin (pin 11).
12 Limiter Out In the Audio muting mode, the DC voltage of this pin is
approximately 4.5V. SIF detection output pin. Insert the following filters between this pin SIF Out and Limiter In pin : , 7 : 4.5MHz BPF for sampling SIF detection signals fy (horizontal scanning frequency) trap filter [75__| Limiter ia | Amplitude limiter input pin. The standard input level i 100dB,V.__| PLL circuit loop filter pin. Insert a capacitor and resistor between this 16 Loop Filter pin and GND. The resistance and capacitance determine the loop filter time constant. VCO coil pins. Adjust the resonance frequency by changing the variable capacitor in the IC. The frequency adjusting range should be
17 VCO Coil 1 as follows :
18 VCO Coil 2 When the resonance circuit has capacitor of 30pF and resonance
frequency of 58.75MHz, the frequency should be adjusted to 2~3Mhz. PLL synchronous detection circuit filter pin. This is the pin of the filter PLL Synchronous . . i" peje ema Insert a capacitor between this pin and GND. 1999-03-12 3/21
wwe [ed AFT voltage output pin. The AFT voltage is output with a single 20 AFT Out polarity. When a resistor of 5.1kQ is connected between the AFT Coil pin (pin 23) and GND, the AFT function is defeated. 1 Video Out Pin for outputting video signal after PIF signal detection. The standard output level is 2Vp-p. 2 2nd AGC AGC circuit filter pins. Insert a resistor and capacitor between pin 22 24 1st AGC and GND, and a capacitor between pin 24 and GND. This IC uses a peak-type AGC. The PIF circuit has a 3-stage amplifier. Pin for connecting the AFT coil. Insert an AFT coil, capacitor, AFT 23 AFT Coil defeat switch, and resistor between this pin and GND. For AFT defeat, connect a 5.1kQ resistor between this pin and GND. TERMINAL INTERFACE CIRCUIT O We i 3429 | le 3s @ LX sap nant 3 3 7 8 Ss _ eee | Orr tah ts 4<| ATS ‘ (J -& - g BO) ®O Ed +4 ©. z > ° SF ST > z ® syeye a oH "nse 2kQ MUTE ® 3 fe | CY © 2540 @ © oa z \\_] < S. MW S o 6) Vy O& Y OME] *® | \\] ° Cm S 3g 1999-03-12 4/21
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MAXIMUM RATINGS (Ta = 25°C) CHARACTERISTIC SYMBOL RATING UNIT Supply Vorage PNT) Operating Temperature -20~65 =55=150 (Note) When using the device at above Ta =25°C, decrease the power dissipation by 11.2mW. for each increase of 1°C. RECOMMENDED SUPPLY VOLTAGE FEE | rwcane [|e [ne | | 3 [PIF Vcc V | 10_[siF Voc
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS (Unless otherwise specified, Vcc =9V, Ta = 25°C) TEST CHARACTERISTIC TEST CONDITION va | re. | ax] ur CUIT [Power Corrent F__| Tor | Nowe [ars [23 [345 [ma | Power Current SI [rs | 2s [375 | ma | [43] a6 | 49 | [as [a6 49 | [30 [34 | 38 | 43 [46 | 49 | Terminal Voltages (Note) Vv [26] 29] 32 | [37 [40 [3 | | 48 [ 51 | 54 | Pas p38 [ar] (Note) PIF In : No input. Pins 8, 11, 22, and 24 : GND 1999-03-12 6/21
AC CHARACTERISTICS (Unless otherwise specified, Vcc =9V, Ta=25°C, specified coil used) PIF stage TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT Input Sensitivity Vin MIN (Note 1) [| — | 42 [| 45 [dB Vin max |_| (Note 2) [100 [106 | — [a8 .V] Differential Gain (Note 3) [= [3030 % | Differential Phase [Dp | [= 1s [30 [=| No-Signal Level [vi Wore #) Larpso[s3s |v syne. Tip Level Vsyne |_| (Note 5) [Picture Output | Vour | 1 | (Note 6) | 17 20] 23 | Vpp | Picture S7N Ratio (ote 7) [s0-[ 53 | — | 6B | Carrier Suppression Ratio | | 1 | (Note 8) [30 — [= [as | [Harmonic Suppression Ratio | 12nd | 1 | (Note) | 50] — | — | a8 | Intermediate Modulation | 1920 | 1_| (Note 10) [45 [50 | — | a | Video Frequency Characteristics fc 1 (Note 11) 10 AGC stage TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT TAGE Range Rrace | 1 | (Note 12) [se [es | 8 | ae | FAG Minimum Output | Vig min | 1 | (Note 13) | — | — | 37] v_| IFAGC Maximum Output| Vir max |1 | (Note) | 83 | — | —]| Vv RF AGC Minimum Output | VF min | 1 | (ote 15) | — | — [05 | v_| RF AGC Maximum Output | Var max 11 | (Note 16) Des {— [— [v1 AFT stage TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT AFT Sensitivity [ aF/av [1 | (Note 17) [ — | 20 | 25 [kHz/vi AFT Center Voltage [Vent | 1_| (Note 18) [es [as fes | v_| AFT Minimum Output | Vi | 1 | (Note 19) [— [os por |v] [AFT Maximum Output | vy | 1 | _(Note2) | 83] es|— |v | 1999-03-12 7/21
CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT Pullin Range 1 (H) [ tom | 7 | (Note 27) [| — | 500 [ = | kt | Pull-in Range 1 (L) [four | 1 | (Note 22) | — {500 [ — | ktz | Pull-in Range 2 (H) | fone | 1 | (Note 23) | 500 | 750 | — | kh | Pull-in Range 2 (I) | fo | 1 | (Note 24) [ soo | 750 [| — | kkz | Hold Range (H) [tht | (Note 25) [= [800 [ kee | Hold Range (0 [fa [1 | (Note 26) | — | 800 | — | keke | Control Sensitivity Der] (Note 27) [= p25 [ine SIF stage TEST CHARACTERISTIC SYMBOL | CIR- TEST CONDITION TYP. | MAX. | UNIT CUIT FM Detection Output | Vop | 1 | (ote 28) [350 | 450 | 600_|rVeme| [input Sensitivity | Vue | 1 | (Note 28) | — | 35] 45 [abv AM Suppression Ratio (ote 30) | a | 55] — | 8 | =3dB Band Width [eae [1 | (ote 31) [270 [110 | — | Kee | IS7N Ratio (| S/N DET | 1 | (Note 32) [50] 60] — | «8 | [Distortion Rate kFAaF | 1 (Note 33) [= ost rol %_| COIL ADJUSTMENT This section explains how to adjust the VCO, AFT, and SIF coils. Be sure to adjust these coils before measuring the IC characteristics. 1. Adjusting the VCO coil The PIF In pins (pin 4 and pin 5) in no-signal (no-input) state and connect the 2nd AGC pin (pin 22) to GND. Measure the Loop Filter (pin 16) DC voltage (Va). Then, disconnect the 2nd AGC pin (pin 22) from GND and supply the following signal to the PIF In pins (pins 4 and 5) : Carrier frequency : fo =58.75MHz Signal amplitude =90dBV Now, measure the Loop Filter pin (pin 16) DC voltage Vg and adjust the VCO coil so that Va =Vg. 2. Adjusting the AFT coil Supply the following signal to the PIF In pins (pins 4 and 5) : Carrier frequency : fo =58.75MHz Signal amplitude =90dByV Then, turn the AFT Defeat switch (connected to pin 23) to OFF (open) and measure the AFT Out pin (pin 23) DC voltage. While observing the DC voltage changes, adjust the AFT coil. Determine the area the DC voltage significantly changes and, within this range, further adjust the AFT coil until the following condition is met : AFT pin (pin 23) DC voltage =4.5V 1999-03-12 8/21
- Adjusting the SIF coil Supply the following signal to the limiter In pin (pin 15) : Carrier frequency : fo =4.5MHz Signal amplitude = 100dBV Then, turn the Audio muting switch (connected to pin 11) to OFF (open) and measure the Audio Out pin (pin 9) DC voltage. While observing the DC voltage changes, adjust the SIF coil until the following condition is met : Audio Out pin (pin 9) DC voltage =4.5V MEASUREMENT CONDITIONS <PIF circuit> (Note 1) Input sensitivity As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fg =58.75 MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 30% Change the input signal amplitude (level of signals supplied to pins 4 and 5) and, when the Video Out (pin 21) signal amplitude = - 3dB, measure the input signal amplitude. The reference value (0dB) is the pin 21 signal amplitude when input signal amplitude =90dB/.V. (Note 2) Maximum input As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 30% Change the input signal amplitude (level of signals supplied to pins 4 and 5) and, when the Video Out (pin 21) signal amplitude = +0.5dB, measure the input signal amplitude. The reference value (0dB) is the pin 21 signal amplitude when input signal amplitude =90dB/.V. (Note 3) DG and DP As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal =TV standard signal (video amplitude : sync amplitude =10 : 4), ramp waveform signal. Amplitude modulation factor : 87.5% Signal amplitude = 90dBuV Measure DG and DP of the Video Out (pin 21) signal using a vector scope. (Note 4) No-signal level Measure the video Out (pin 21) DC voltage when pins 4 and 5 are in the no-signal state and the 2nd AGC pin (pin 22) voltage = OV. 9999-03-12 927
(Note 5) Sync. Tip level As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal =TV standard signal (video amplitude : sync amplitude =10 : 4), ramp waveform signal. Amplitude modulation factor : 87.5% Signal amplitude = 90dBuV Measure the DC level at the video Out (pin 21) Sync. Tip level. (Note 6) Video output amplitude As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal =TV standard signal (video amplitude : sync amplitude =10 : 4), ramp waveform signal. Amplitude modulation factor : 87.5% Signal amplitude = 90dBuV Measure the video Out (pin 21) signal amplitude. (Note 7) Picture Signal $/N ratio As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 30% Signal amplitude (input signal level) =90dByV Measure the Video Out (pin 21) signal amplitude V1 using an effective voltmeter. Then, change the modulation factor to 0% and measure the Video Out (pin 21) signal amplitude V2. Assign V1 and V2 to the following formula to get the picture signal S/N ratio : S/N ratio =20€0g (6 V1/V2) [dB] (Note 8) Carrier suppression ratio As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 78% Signal amplitude (input signal level) =90dByV Monitor the Video Out (pin 21) signal with a spectrum analyzer and measure the 15.75kHz and 58.75MHz components. Assign these component values to the following formula to get the carrier suppression ratio : Carrier suppression ratio = 200g (15.75kHz component/58.75MHz component) 1999-03-12 10/21
(Note 9) Harmonic suppression ratio As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 78% Signal amplitude = 90dBuV Monitor the Video Out (pin 21) signal with a spectrum analyzer and measure the 15.75kHz and the second harmonic (58.75 x 2=117.5MHz) components. Assign these component values to the following formula to get the harmonic suppression ratio : Harmonic suppression ratio = 20€0g (15.75kHz component/second harmonic component) (Note 10) Intermediate modulation As the PIF In signal, supply the mixture of the following signals to pins4 and 5 : SG1 (frequency = 58.75MHz (P), signal amplitude = 90dB/V) SG2 (frequency = 54.25MHz (S), signal amplitude = 80dBV) SG3 (frequency =55.17MHz (C), signal amplitude = 80dB V) Then, supply external DC voltage to the 2nd AGC pin (pin 22). Monitor the Video Out (pin 21) signal waveform and adjust the DC voltage supplied to pin 22 so that the following condition is met : Sine wave signal bottom level =Sync. Tip DC voltage Next, monitor the Video Out (pin 21) signal with a spectrum analyzer and measure the chrominance signal and 920kHz components. Calculate the intermediate modulation from the following : Intermediate modulation = chrominance signal component - 920kHz signal component (Note 11) Video frequency characteristics As the PIF In signal, supply the following external signal to pins 4 and 5 : Frequency : fo =58.75MHz, Sine wave Signal amplitude = 90dBuV Measure the 2nd AGC pin (pin 22) DC voltage. Next, supply the same external voltage as this voltage to the 2nd AGC pin (pin 22) and clamp it. Then, as the PIF In signal, supply the mixture of the following signals to pins 4 and SG1 (frequency = 58.75MHz fixed, signal amplitude = 90dBV) SG2 (frequency = 58.65 to 45.00MHz sweeped, signal amplitude = 70dB/:V) Monitor the Video Out (pin 21) signal with a spectrum analyzer and measure the input signal frequency when the signal amplitude is -3dB of the reference value. Calculate the difference between the input signal frequency measured and 58.75MHz. The reference value (0dB) is the pin 21 signal amplitude when inputting 58.65MHz. 1999-03-12 11/21
<AGC circuit> (Note 12) IF AGC range Assign the PIF circuit maximum input value and input sensitivity to the following formula to get the IF AGC range : IF AGC range = maximum input value - input sensitivity [dB] (Note 13) IF AGC min. output As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 30% Signal amplitude = 110dByV Measure the 2nd AGC pin (pin 22) DC voltage. (Note 14) IF AGC max. output Place pins 4 and 5 in the no-signal state and measure the 2nd AGC pin (pin 22) DC voltage. (Note 15) RF AGC min. output As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 30% Signal amplitude = 110dByV Connect the RF AGC Delay pin (pin 13) to GND. Then, measure the RF AGC pin (pin 2) DC voltage. (Note 16) RF AGC max. output Place pins 4 and 5 in the no-signal state and connect the RF AGC Delay pin (pin 13) to Vcc. Then, measure the RF AGC pin (pin 2) DC voltage. 1999-03-12 12/21
<APFT circuit> (Note 17) AFT sensitivity As the PIF In signal, supply the following external signal to pins4 and 5 : Frequency : fo =58.75MHz, Sine wave Signal amplitude = 90dBuV Adjust the AFT coil so that the following condition is met : 4.4VS AFT Out pin (pin 20) voltage=4.6V Then, measure the AFT Out pin (pin 20) voltage (V4). Change the frequency to the following value : Sine wave signal frequency = 58.75MHz + 20kHz = 58.77MHz Then, measure the AFT Out pin (pin 20) voltage (V2). Assign V1 and V2 to the following formula to get the AFT sensitivity : AFT sensitivity = (AF / AV) = (58.77 - 58.75 = 20/|V4 -Vo]) [kHz] (Note 18) AFT center voltage Place pins 4 and 5 in the no-signal state and connect the 2nd AGC pin (pin 22) to GND. Then, measure the AFT Out pin (pin 20) DC voltage. (Note 19) AFT min. output As the PIF In signal, supply the following external signal to pins 4 and 5 : Frequency : fo =58.75MHz + 50kHz = 59.25MHz, Sine wave Signal amplitude = 90dBuV Measure the AFT Out pin (pin 20) voltage. (Note 20) AFT max. output As the PIF In signal, supply the following external signal to pins 4 and 5 : Frequency : fo =58.75MHz — 50kHz = 58.25MHz, Sine wave Signal amplitude = 90dBuV Measure the AFT Out pin (pin 20) voltage. (Note 21) VCO pull-in range 1 (H) As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 30% Signal amplitude = 90dBuV Supply external DC voltage to the PLL Synchronous Detection pin (pin 19) so that pin 19 voltage is 2V. Next, gradually decrease the carrier frequency from 62.00MHz to 58.75MHz. Measure the carrier frequency when the Video Out pin (pin 21) starts generating a horizontal blanking signal from the no-signal state. Calculate the difference between this frequency and 58.75MHz. 1999-03-12 13/21
(Note 22) VCO pull-in range 1 (L) As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 30% Signal amplitude (signal level) = 90dBV Supply external DC voltage to the PLL Synchronous Detection pin (pin 19) so that pin 19 voltage is 2V. Next, gradually increase the carrier frequency from 55.00MHz to 58.75MHz. Measure the carrier frequency when the Video Out pin (pin 21) starts generating a horizontal blanking signal from the no-signal state. Calculate the difference between this frequency and 58.75MHz. (Note 23) VCO pull-in range 2 (H) Same as Note 21 above, except the following : The PLL Synchronous Detection pin (pin 19) voltage should be 6V. (Note 24) VCO pull-in range 2 (L) Same as Note 22 above, except the following : The PLL Synchronous Detection pin (pin 19) voltage should be 6V. (Note 25) VCO hold range (H) As the PIF In signal, supply the following external signal to pins4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 30% Signal amplitude = 90dBuV Gradually increase the carrier frequency from 58.75MHz. Measure the carrier frequency when the following changes start to occur : PLL unlocked The Video Out pin (pin 21) stops generating horizontal blanking signals. The Video Out pin (pin 21) starts generating beat signals. Calculate the difference between this frequency and 58.75MHz. 1999-03-12 14/21
(Note 26) VCO hold range (L) As the PIF In signal, supply the following external signal to pins 4 and 5 : Carrier frequency : fo =58.75MHz Modulation signal frequency : fm =15.75kHz Amplitude modulation factor : 30% Signal amplitude = 90dBuV Gradually decrease the carrier frequency from 58.75 MHz. Measure the carrier frequency when the following changes start to occur : PLL unlocked The Video Out pin (pin 21) stops generating horizontal blanking signals. The Video Out pin (pin 21) starts generating beat signals. Calculate the difference between this frequency and 58.75MHz. (Note 27) Control sensitivity Place pins4 and 5 in the no-signal state, supply external DC bias voltage to the Loop Filter pin (pin 16), connect the Loop Filter pin (pin 16) output to the spectrum analyzer, and then perform the following measurements : Adjust the Loop Filter pin (pin 16) DC bias voltage so that the VCO oscillating frequency =58.75MHz and measure the pin 16 voltage (V4). Set the pin 16 voltage to (V;+0.2V) and measure the VCO frequency (F1). Set the pin 16 voltage to (V;-0.2V) and measure the VCO frequency (F2). Assign Fy and F2 to the following formula to get the control sensitivity : Control sensitivity =(|Fy-F2|/0.4) [MHz/V] <SIF circuit> (Note 28) FM detection As an SIF In signal, supply the following external signal to the Limiter Input pin (pin 15) : Carrier frequency : fo =4.5MHz Modulation signal frequency : fr =400Hz Modulation mode : FM (frequency modulation) Frequency modulation factor : 25kHz/devi Signal amplitude : 100dByuV Measure the amplitude of the signal output from the Audio Out (pin 9). 1999-03-12 15/21
(Note 29) Limiting sensitivity As an SIF In signal, supply the following external signal to the Limiter Input pin (pin 15) : Carrier frequency : fo =4.5MHz Modulation signal frequency : fp, =400Hz Modulation mode : FM (frequency modulation) Frequency modulation factor : 25kHz/devi Signal amplitude : 100dByuV Change the signal amplitude so that the Audio Out (pin 9) signal amplitude = - 3dB. Measure the signal amplitude. The reference value (0dB) is the Audio Out (pin 9) signal amplitude when the signal amplitude is 100dByV. (Note 30) AM suppression ratio As an SIF In signal, supply the external signal to the Limiter In pin (pin 15) : Carrier frequency : fo =4.5MHz Modulation signal frequency : fr =400Hz Modulation mode : FM (frequency modulation) Frequency modulation factor : 25kHz/devi Signal amplitude = 100dByV Measure the signal amplitude root mean square value V1 of the signal output from the Audio Out (pin 9). Then, supply the external signal to the Limiter In pin (pin 15) : Carrier frequency : fo =4.5MHz Modulation signal frequency : fp, =400Hz Modulation mode : AM (amplitude modulation) Amplitude modulation factor : 30% Signal amplitude = 100dByV Measure the signal amplitude root mean square value V2 of the signal output from the Audio Out (pin 9). Assign V1 and V2 to the following formula to get the AM suppression ratio (AMR) : AMR = 20€0g (V1/V2) [dB] 1999-03-12 16/21
(Note 31) -3dB band width As an SIF In signal, supply the following external signal to the Limiter In pin (pin 15) : Carrier frequency : fo =4.5MHz Modulation signal frequency : fp, =400Hz Modulation mode : FM (frequency modulation) Frequency modulation factor : 25kHz/devi Signal amplitude = 100dByV Measure the amplitude of the signal output from the Audio Out pin (pin 9). Using this value as the reference (0dB), perform the following measurements : Gradually increase the carrier frequency from the initial value (4.5MHz) so that the Audio Out (pin 9) signal amplitude = - 3dB. Measure the current carrier frequency FAFh. Next, gradually decrease the carrier frequency from the initial value (4.5MHz) so that the Audio Out (pin 9) signal amplitude = -3dB. Measure the current carrier frequency FAFI. Assign FAFh and FAFI to the following formula to get the -3dB band width : -3dB band width = FAFh -FAFI [kHz] (Note 32) Audio S/N ratio As an SIF In signal, supply the following external signal to the Limiter In pin (pin 15) : Carrier frequency : fo =4.5MHz Modulation signal frequency : fr =400Hz Modulation mode : FM (frequency modulation) Frequency modulation factor : 25kHz/devi Signal amplitude = 100dByV When the FM factor is 25kHz/devi, measure the amplitude root mean square value (V1) of the signal output from the Voice Out pin (pin 9). Next, when the FM factor is 0 (no modulation), measure the amplitude root mean square value (V2). Assign V1 and V2 to the following formula to get the Audio S/N ratio : Audio S/N ratio =20€0g (V1/V2) [dB] (Note 33) Distortion rate As an SIF In signal, supply the following external signal to the Limiter In pin (pin 15) : Carrier frequency : fo =4.5MHz Modulation signal frequency : fp, =400Hz Modulation mode : FM (frequency modulation) Frequency modulation factor : 25kHz/devi Signal amplitude = 100dByV Measure the distortion rate of the signal output from the Audio Out pin (pin 9). 9999-03-12 1727
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SDIP24-P-300-1.78 Unit : mm fo 24 13 3 foe oe eee oe | a og g 8 ; a eF ‘LItItItIitstItittitititl a 1 12 22.5MAX 22.040.2 ee en q LB ATID OTATABABISIDIGIBIDIDL a] 3 | lives lowes oS Weight : 1.22g (Typ.) 1999-03-12 21/21