T4258

T4258 ATMEL | Alldatasheet

Document overview

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Technical content

Features

Receiving condition analyzer Integrated band filter for 2nd IF; with software controlled bandwidth Pin compatible with U4255BM FM-double conversion system World tuner, US Weatherband, J-band Completely integrated FM demodulator Soft mute and multipath noise cancellation AM up-/down conversion system AM stereo capability Stop signal generation for AM and FM Automatic alignment possible 3-wire bus controlled Block Diagram ÏÏ ÏÏ AGC AM FM OSC AGC Bandgap Bus INT Stop Soft Mute Dev. Ana. AM Dem. AGC FM Dem.Adj. Chan. Divider Automatic Adjustment AM FM Multi– path 9 10 MPX 1213 17 18 19 21 IF2OUT 23 24 26 27282930 MULTIP IFAGCH IFAGCL FILADJ 38 39 OPLPF 43 44 AMAGC MX1AMA GNDMX MX1FMA MX1FMB OSCOUT GNDOSC OSCE OSCB FMAGC EN CLK DATAV57 GND VS METER MX2LO ADJAC INT SMUTE DEV V3PIF2INMX2OA MX2OB MX2IN IF1OUT IF1AMI IF1REF IF1FMI MX1OBMX1OA AMPLPF MX1AMB AMVREG ÏÏ Divider 2...10 Offset Noise– blanker Figure 1. Block diagram

Ordering Information

Extended Type Number Package Remarks T4258-ILQ SSO44 Taped and reeled T4258-ILS SSO44 Tube

1 MX1FMA 1st mixer FM input A

2 MX1FMB 1st mixer FM input B

3 MX1AMB 1st mixer AM input B

4 GNDMX Ground 1st mixer

5 FMAGC FM preamplifier AGC

6 AMVREG AM control voltage

7 AMAGC AM preamplifier AGC

8 AMPLPF AM AGC LP filter

9 METER Fieldstrength output

10 ADJAC Adjacent channel detection output

11 MPX Multiplex signal

13 OSCB Oscillator basis

14 OSCE Oscillator emitter

15 GNDOSC Oscillator ground

16 OSCOUT Oscillator output

17 EN 3-wire bus enable

18 CLK 3-wire bus clock

19 DA TA 3-wire bus data

20 IF2OUT 2nd IF amplifier output

21 INT Interrupt, stop signal, test out

23 MX2OB 2nd mixer output B

24 MX2OA 2nd mixer output A

25 GND Ground

26 MX2IN 2nd mixer input

28 IF2IN 2nd IF amplifier input

29 V3 3 V reference for IF1OUT, MX2IN

30 IF1OUT 1st IF amplifier output

31 DEV Deviation detect output

32 OPLPF Operating point LPF

33 IF1AMI 1st IF AM amplifier input

34 SMUTE Soft MUTE control input

35 IFAGCH IF AGC LP filter high time constant constant

36 IFAGCL IF AGC LP filter low time constant

37 FILADJ Filter adjust

38 IF1FMI 1st IF FM amplifier input

40 MUL TIP Multipath detection output

41 MX1AMA 1st mixer AM input A

42 VS Supply voltage

43 MX1OA 1st mixer output A

44 MX1OB 1st mixer output B

Figure 2. Pinning SSO44

Rev. A1, 10-Jan-01 3 (17) Absolute Maximum Ratings All voltages are referred to GND (Pin 25) Parameter Symbol Value Unit Supply voltage Pin 42 V S 10 V Power dissipation Ptot 1,0 W Junction temperature Tj 150 °C Ambient temperature range Tamb –40 to +85 °C Storage temperature range Tstg –50 to +150 °C Operating Range All voltages are referred to GND (Pin 25) Parameter Symbol Min. Typ. Max. Unit Supply voltage range Pin 42 V S 8 8.5 10 V Ambient temperature Tamb –40 85 °C Thermal Resistance Parameter Symbol Value Unit Junction ambient soldered to PCB R thJA t.b.d. K/W

Electrical Characteristics

Test conditions (unless otherwise specified): VS = +8.5 V , Tamb = +25°C for AC parameters: fiRF = 1 MHz, Rg = 50 , fMOD = 0.4 kHz, m = 0.3, fIF = 450 kHz, reference point Pin 4 Parameter Test Conditions / Pins Symbol Min. Typ. Max. Unit Supply voltage Pin 42 V S 8.5 10 V Supply current Pin 42 IS 100 mA AM RF AGC AGC threshold Mixer Input (2 bit) 91 100 dbµV dbµV dbµV dbµV AM LO divider Programmable divider (3 bit) N 2 10 AM Mixer (10.7 MHz) DC supply current Pin 43 + 44 17 mA Conversion conductance ioif/virf Sm1 4.1 mA/V Maximum IF output Pins 43, 44VoIF 8 V pp Input intercept point 3rd order IP3 133 dB µV Input resistance 10 MHz Pin 41 13 k

Rev. A1, 10-Jan-014 (17) Electrical Characteristics (continued) Test conditions (unless otherwise specified): VS = +8.5 V , Tamb = +25°C for AC parameters: fiRF = 1 MHz, Rg = 50 , fMOD = 0.4 kHz, m = 0.3, fIF = 450 kHz, reference point Pin 4 UnitMax.Typ.Min.SymbolTest Conditions / PinsParameter AM-1st IF Amplifier (10.7 MHz) Input resistance Pin 33 Ri 100 k IF preamplifier gain R L = 330 Pins 33 to 30 G 15 dB Preamplifier control range 26 dB Output intercept point 3rd order IP3 137 dB µV Noise figure F 10 dB Mixer 2 (450 kHz) DC supply current Pin 23 + 24 10 mA Conversion conductance ioif2/viif1 Sm2 2 mA/V Maximum IF output Pins 23, 24VoIF 8 V pp Output impedance Pin 23 – GND Pin 24 – GND R o C o M pF Input intercept point 3rd order IP3 133 dB µV Input resistance R i 330 2nd IF Amplifier (450 kHz) Input resistance Pin 28 R i 3 k IF preamplifier gain Pin 28 to 20 G 53 dB Preamplifier control range 47 dB IF2 Output (Pin 20) Output level 200 mV Oscillator Oscillator amplitude R g (Pin 13) = 220 , Q of Losc = 70 V LOB V LOE V LObuf 70 160 100 90 220 mV mV mV Frequency range fOSC 70 260 MHz Harmonics Pin 16 –15 dBc Output resistance Pin 16 R LObuf 70 Programmable oscillator divider Range FM Europe FM Japan AM WB Nosc 1 1.5

Rev. A1, 10-Jan-01 5 (17) Test conditions (unless otherwise specified): VS = +8.5 V , Tamb = +25°C, for AC parameters: fiRF = 100 MHz, Rg = 50 , fMOD = 0.4 kHz, f = ±75 kHz, fIF = 450 kHz, reference point Pin 4 Parameter Test Conditions / Pins Symbol Min. Typ. Max. Unit FM AGC AGC threshold mixer input (2 bit) Vmixin 85 103 dB µV dB µV dB µV dB µV AGC threshold mixer output Vmix- out t.b.d. dB µV AGC threshold IF amp. out Vif1out t.b.d. dB µV FM Mixer Conversion transconductance gc 7 mA/V 3rd order intercept point Load impedance: R L43, 44 = 200 Ω IP3 125 dB µV Noise figure NF dsb 10 dB Input resistance Pin 1 to 2R i 1, 2 kΩ Input capacitance Pin 1 to 2C i 1, 2 5 pF Input 1 resistance to groundf = 100 MHz Pin 1 R i1 kΩ Input 1 capacitance to ground f = 100 MHz Pin 1 C i1 9 pF Input 2 resistance to groundf = 100 MHz Pin 2 R i2 kΩ Input 2 capacitance to ground f = 100 MHz Pin 2 C i2 7 pF Output capacitance to GND Pins 43, 44C o 43, C o 44 5 pF 1st IF FM Amplifier Digitally adjustable gain 3 bit, 10.7 MHz G min G max dB dB Input resistance Pin 38 R i 38 330 Ω Output resistance Pin 30 R o 30 330 Ω Temperature coefficient of the gain Bit 66 = 0 TK1 dB/K Temperature coefficient of the gain Bit 66 = 1 TK2 dB/K Noise figure F t.b.d. dB Output intercept point 3rd order IP3 130 dB µV

Rev. A1, 10-Jan-016 (17) Electrical Characteristics (continued) Test conditions (unless otherwise specified): VS = +8.5 V , Tamb = +25°C, for AC parameters: fiRF = 100 MHz, Rg = 50 , fMOD = 0.4 kHz, f = ±75 kHz, fIF = 450 kHz, reference point Pin 4 UnitMax.Typ.Min.SymbolTest Conditions / PinsParameter FM Demodulator (Pin 11) Output voltage V iPin 23, 24 = 40 mV f = 450 kHz Deviation = ± 22.5kHz, f MOD = 1 kHz V MPX , Pin 11 150 mV Signal-to-noise related to 22.5 kHz dev. Bandwidth = 30 Hz .. 20 kHz Deemphasis 50 µs S/N 60 dB Total distortion Bandwidth 2nd IF filter = 120 kHz 0.3 % WB Demodulator (Pin 11) Output voltage Bit 71 = 0, Bit 72 = 1 V iPin 23, 24 = 40 mV f = 450 kHz Deviation = ± 2.5 kHz, f MOD = 1 kHz V MPX , Pin 11 165 mV Total distortion Bandwidth 2nd IF filter = 30 kHz 3.5 % Fieldstrength Output (Pin 10) (Bit 80 = 0) Range 85 dB Max. output voltage 5 V Steepness 50 mV/dB Integrated IF filter Bandwidth FM (4 bit) WB (4 bit) 200 100 kHz kHz Centerfrequency adjust –43 +43 kHz MPX Lowpass Bandwidth Bit 79 = 0 Bit 79 = 1 180 kHz kHz Stopsignal Generator Stop Window ± 0.5 ± 80 kHz

Figure 3. Bus timing

Rev. A1, 10-Jan-018 (17) Data Transfer A24_100 MSB BYTE3 LSB MSB BYTE2 LSB MSB BYTE1 LSB ADDR. Demodulator Gain FM – IF1 Pin21 INT Search stop window/ Noiseblanker AM sensitivity Local OSC AM divider/ Multipath sensitivity Pin9 Meter Pin11 MPX LPF Stop signal gate time 1 0 0 1= AM FM stop nband 90kHz B93 B92 B91 B90 B89 B88 B87 B86 B85 B84 B83 B82 B81 B80 B79 B78 B77 B76 B75 B74 B73 A24_101 MSB BYTE3 LSB MSB BYTE LSB MSB BYTE1 LSB ADDR. WB demodu- lator gain Soft mute threshold Soft mute depth TK FM IF1 ampl. AGC threshold AM/FM 1st IF ampl. AM/FM 1st Mixer +AGC AM/FM Pin23/ Pin24 MX2O band- width Int. IF2 reference shift Pin 20 IFOUT Pin28 IF2IN Demo- dulator control Gain local OSC 1 0 1 1= 26dB 1=AM 1=AM 0= IF2out open active low B72 B71 B70 B69 B68 B67 B66 B65 B64 B63 B62 B61 B60 B59 B58 B57 B56 B55 B54 B53 B52 A24_111 MSB BYTE LSB MSB BYTE LSB MSB BYTE LSB ADDR. Local OSC AGC Do not change Pin 9 offset Bandpath filter center frequency Pin 9 Meter Local OSC AGC prescaler (VCO(Buffer) 1 1 1 0 0 0 0 0 0 0 0 0 1= +multi B30 B29 B28 B27 B26 B25 B24 B23 B22 B21 B20 B19 B18 B17 B16 B15 B14 B13 B12 B11 B10 A8_100 MSB BYTE 1 LSB ADDR. Test– mode Multipath noise cancellation Pin 11 MPX OUT Pin 40/10 Reset Noise blanker AM 1 0 0 0 0=on 1=Mute 0 1=on B9 B8 B7 B6 B5 A8_101 MSB BYTE 1 LSB ADDR. Pin 21 INT Bandpath filter Band width 1 0 1 1= ON B4 B3 B2 B1 B0

Figure 4. Pulse diagram

Rev. A1, 10-Jan-0110 (17) In AM mode (Bits 92, 93), Bits 81 to 84 set the divide factor of the AM divider Divider AM Mixer 1 Bit Bit Bit Bit Bit Bit Divide by 10 1 0 1 X X X Divide by 9 1 0 0 1 1 1 Divide by 8 1 0 0 1 1 0 Divide by 7 1 0 0 1 0 1 Divide by 6 1 0 0 1 0 0 Divide by 5 1 0 0 0 1 1 Divide by 4 1 0 0 0 1 0 Divide by 3 1 0 0 0 0 1 Divide by 2 1 0 0 0 0 0 In FM mode and in weather band mode (Bit 92, 93), the Bits 81 to 84 set the multipath sensitivity Sensitivity Multipath Bit Bit Bit Bit Bit Bit Off x 1 0 0 0 0 Low x 1 0 0 0 1 x 1 0 0 1 0 x 1 0 0 1 1 x 1 0 1 0 0 x 1 0 1 0 1 x 1 0 1 1 0 Normal x 1 0 1 1 1 x 1 1 0 0 0 x 1 1 0 0 1 x 1 1 0 1 0 x 1 1 0 1 1 x 1 1 1 0 0 x 1 1 1 0 1 x 1 1 1 1 0 High x 1 1 1 1 1 Bit 80 and Bit 13 switches between narrow band field strength information and wide band field strength information Field strength narrow band / wide band Bit Bit FM field strength (wide band) 0 1 Wide Band + Multipath fieldstrength 0 0 AM field strength from AGC (narrow band) 1 1 Narrow band + Multipath fieldstrength1 0 Bit 79 controls the band width of the low pass filter of the MPX output Band Width MPX Low Pass Filter Bit 79 90 kHz 0 180 kHz 1 The stop counter calculates an average center frequency during the time which is set by the bits 73 to 78 Time Window for Stop Signal Bit Bit Bit Bit Bit Bit 3.1969 ms 0 0 0 0 0 0 1 x 3.1969 ms 0 0 0 0 0 1 ... 63 x 3.1969 ms 1 1 1 1 1 1 The demodulator gain for the weather band mode is set by the bits 71 and 72 Demodulator Gain in Weather Band Mode Bit 72 Bit 71 5 x 0 0 7.5 x 0 1 10 x 1 0 15 x 1 1

Rev. A1, 10-Jan-01 11 (17) For soft mute, the MPX signal level will be reduced depending on the input signal strength. Bits 68 to 70 set the input signal field strength, at which the MPX signal will be reduced by 3 dB (for soft mute). The setting of fieldstrength offsett (Bit 18 ... 21) has also influence of the soft start. Start Soft Mute Bit 70 Bit 69 Bit 68 0 dB 0 0 0 1 dB 0 0 1 2 dB 0 1 0 3 dB 0 1 1 4 dB 1 0 0 5 dB 1 0 1 6 dB 1 1 0 7 dB 1 1 1 Bit 67 sets the maximum reduction of the MPX signal level Max. Value of Soft Mute Bit 67 30 dB 0 26 dB 1 Temperature coefficient setting of FM IF–amplifier Temperature Coefficient (TC) of the IF Amplifier Bit 66 TK 1 0 TK 2 1 Level control of the FM / WB – AGC threshold FM AGC Threshold Bit 65 Bit 64 Bit 62 103 dBµV 0 0 0 97 dBµV 0 1 0 92 dBµV 1 0 0 85 dBµV 1 1 0 Level control of AM-AGC threshold AM Control Start Bit 65 Bit 64 Bit 62 91dB µV 0 0 1 94 dBµV 0 1 1 97 dBµV 1 0 1 100 dBµV 1 1 1 Bits 60 and 61 controls the band width of the 2nd-mixer output tank, in FM mode FM Band Width Mixer 2 Bit 61 Bit 60 150 kHz 0 0 200 kHz 0 1 250 kHz 1 0 450 kHz 1 1 Bit 62 select which 1st mixer and AGC stage in active Bit 62 FM mixer + FM AGC active 0 AM mixer + AM AGC active 1 Bit 63 controls which 1st IF amplifier is active Bit 63 1st FM – IF amplifier active 0 1st AM – IF amplifier active 1 Setting of the internal second IF reference shift IF Offset Bit 59 Bit 58 Bit 57 Bit 56 + 0.00 kHz 0 0 0 0 + 6.25 kHz 0 0 0 1 + 12.50 kHz 0 0 1 0 + 18.75 kHz 0 0 1 1 + 25.00 kHz 0 1 0 0 + 31.25 kHz 0 1 0 1 + 37.50 kHz 0 1 1 0 + 43.75 kHz 0 1 1 1 – 0.00 kHz 1 0 0 0 – 6.25 kHz 1 0 0 1 – 12.50 kHz 1 0 1 0 – 18.75 kHz 1 0 1 1 – 25.00 kHz 1 1 0 0 – 31.25 kHz 1 1 0 1 – 37.50 kHz 1 1 1 0 – 43.75 kHz 1 1 1 1

Rev. A1, 10-Jan-0112 (17) Function of Pin 20 setting is done by Bit 55 Pin 20: IF out / Field Strength for Multipath Bit 55 2nd IF output 0 Multipath field strength 1 Band filter, in FM mode 2nd IF Filter Bit 54 Internal filter 0 External + internal filter 1 Setting Bit 53 controls the demodulator in FM/ WB mode. Demodulator Control Bit 53 FM fine tuning OFF (default) 1 WB fine tuning 0 Setting Bit 52 controls the gain of the local oscillator. Local Oscillator Bit 52 Low gain 0 High gain 1 Bit 30 controls the oscillator AGC Oscillator AGC Bit 30 AGC of (default) 0 AGC on 1 Setting of the fieldstrenght offset (Output Pin 9) Offset Field- strenght Bit 21 Bit 20 Bit 19 Bit 18 0.0 dB 0 0 0 0 0.5 dB 0 0 0 1 1.0 dB 0 0 1 0 1.5 dB 0 0 1 1 2.0 dB 0 1 0 0 2.5 dB 0 1 0 1 3.0 dB 0 1 1 0 3.5 dB 0 1 1 1 4.0 dB 1 0 0 0 4.5 dB 1 0 0 1 5.0 dB 1 0 1 0 5.5 dB 1 0 1 1 6.0 dB 1 1 0 0 6.5 dB 1 1 0 1 7.0 dB 1 1 1 0 7.5 dB 1 1 1 1 Setting Bit 17 controls the center frequency OFFSET of the integrated bandpath filter’s center frequency. Offset Center Frequency Bit 17 Offset + 0 Offset – 1 Setting the OFFSET of the integrated bandpath filter center frequency. Offset Center Frequency Bit 17 Bit 16 Bit 15 Bit 14 0.00 kHz 0 0 0 6.25 kHz 0 0 1 12.50 kHz 0 1 0 18.75 kHz 0 1 1 25.00 kHz 1 0 0 31.25 kHz 1 0 1 37.50 kHz 1 1 0 43.75 kHz 1 1 1

Rev. A1, 10-Jan-01 13 (17) Setting the local oscillator prescaler (VCO/ Buffer) Prescaler VCO Prescaler Buffer Bit 12 Bit 11 Bit 10 1 1 X 0 0 1.5 3 0 0 1 1.5 1.5 1 0 1 2 2 X 1 0 3 3 X 1 1 Setting Bit 9 (expert mode) activates test mode (B18 – B23 active) Mode Bit 9 Normal mode 0 Test mode 1 Bit 8 = 0 activates the multipath noise canceller Multipath Noise Canceller Bit 8 Active 0 Not active 1 Bit 7 = 1 mutes the MPX output Mute of MPX Output Bit 7 MPX out, Pin 11 0 Mute MPX 1 Bit 6 = 1 resets the Multipath sensor and the adjacent channel sensor Sensor out (Pin 10, 40) Bit 6 Normal 0 To ground 1 Bit 5 switches the AM noiseblanker ON/OFF AM Noiseblanker Bit 5 OFF 0 ON 1 Bits 0 to 3 set the band width of the integrated 2nd IF band filter IF Bandwidth Bit 3 Bit 2 Bit 1 Bit 0 200 kHz 0 0 0 0 190 kHz 0 0 0 1 180 kHz 0 0 1 0 170 kHz 0 0 1 1 160 kHz 0 1 0 0 150 kHz 0 1 0 1 140 kHz 0 1 1 0 130 kHz 0 1 1 1 120 kHz 1 0 0 0 110 kHz 1 0 0 1 100 kHz 1 0 1 0 90 kHz 1 0 1 1 80 kHz 1 1 0 0 70 kHz 1 1 0 1 60 kHz 1 1 1 0 50 kHz 1 1 1 1

Figure 5. Test circuit

Figure 6. Application board schematic

Rev. A1, 10-Jan-0116 (17) Package Dimensions technical drawings according to DIN specifications Dimensions in mm 0.25 0.10 0.3 0.8 18.05 17.80 16.8 2.35 9.15 8.65 7.50 7.30 10.50 10.20 0.25 44 23 1 22

Rev. A1, 10-Jan-01 17 (17) Ozone Depleting Substances Policy Statement It is the policy of Atmel Germany GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances (ODSs). The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. V arious national and international initiatives are pressing for an earlier ban on these substances. Atmel Germany GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively. Atmel Germany GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use Atmel Wireless & Microcontrollers products for any unintended or unauthorized application, the buyer shall indemnify Atmel Wireless & Microcontrollers against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. Data sheets can also be retrieved from the Internet: http://www.atmel–wm.com Atmel Germany GmbH, P .O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423