CXA1003BN | DigiCamel IC Datasheet

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SONY. CXA1003BM/BN Low Power FM IF Amplifier Description Package Outline Unit: mm. CXA1003BM/BN are single-chip ICs for FM Radio such as cellular mobile, et CXA1003BM 24 pin SOP (Plastic) Features cat? ust + It includes all the functions needed to the cellular owe mobile such as second mixer, FM detecting AAAAARABRGR {TSS circuit, muting circuit, RSSI, etc.. oe [Tos2%s « thee wide operating vokage 45 t 9.5V) and low I || current consumption. {During Vec=8V, lec=5.7 mA. Olt Tye) ECEEEECLEL Ea = : Wy ar + It includes the audio output buffer, so it needs ast) mers of | small number of peripheral parts. + It has wide RSSI range and excellent temperature characteristics. ra Functions * Second mixer and oscillation circuit $0P-24°.L01 © IF amplifier and limiter * RSSI (Received Signal Strength Indicator) CXA1003BN 24 pin VSOP (Plastic) * FM detecting circuit + Muting circuit angst y ae \\, Structure TETETETED Bipolar silicon monolithic IC aE EN a <, . { Absolute Maximum Ratings (Ta= 25°C) THT { © Supply voltage Veo 17 v sot [oe ease ot © Operating temperature Toor. ~—35t0 +85 °c | SEH * ® * Storage temperature Tsig —86 to +150 °C wat * Allowable power dissipation Po 780 = mW 5 (CXA1003BM) ee ) 5 500 mw (CXA1003BN) oulio* Recommended Operating Condition \\VSOP-24P-L01 © Supply voltage Vec 461095 Vv 70567A-ST ME 8382383 0005677 630 MM -35- SS... ee

SONY: (CXA1003BM/BN Block Diagram and Pin Configuration (Top View) a ‘Quao IN TE o Al Rsst OUT rs b umout @ = |E| 4) auoio out NC (C) (9) MUTE IN Lim DEC2 ras rf Mix in2 umn T @) mx ins \\F OUT T) ; Vec2 \\FDEc2 =) (4) osc ouT PAK Ls [5 oer @ @® cnoz mixout @4 Q) Gno1 M@! 6382383 0005678 577 Mm 36 ne

SONY: CXA10038M/BN Pin Description Voltage mbol [ x= | seme | (Typ.) [coat cut esenion | vee 30K Fer] Connect @ crystal oscillator to compose a Colpitts type Osc IN 3.0V 20K oscillation circuit. osc ouT 23V In case of using an external ° oscillator, input @ signal to 23K $45K pin @ and connect pin @ to Vcc. Pe] ve | so | * vi EI Input pin of mixer. 7 | Mix int 1.2 4 In case of using a single 8 | MIX IN2 1.2 @ ® | input. connect pin ® to GND with capacitor. vee Control pin of pin @ ; 36K audio output. MUTE IN ® '@Y | & signal is output at L ay ($0.8V), and is muted at H Orva (22.0M). FM detected signal is output. DATA OUT! = _2.5V 9905 Oo The output of pin @ can aupio out! —2.5V be muted by the input of pin Vor Output current is corres: RSSI OUT ponding to a input signal level. ME 8382383 0005679 403 MM 37_ a

SONY: (XA10038M/BN BON re Symbol Voltage Equivalent circuit Description (Typ.) | Vee yee i] 33 | Input pin of quadrature detect: } ing circuit. QUAD IN| -3.3V @ Connect a resonance circuit between pin 43 and @ @asua aan 33v 200 95K uM OUT 1.7 Output pin of limiter. | soua 8K Input and decoupling pin of 17 | UM Dec2 1.7 @ @ | limiter.

18 UM IN IV aica 15K: Connect pin @ and @

19 | UM DECI 1.7 @ to GND with capacitor (0.01 19K 15k: to 0,047 pF). Dsoud © 0.087HF) vee 11K IF OUT 1.6V 1K Output pin of IF amp. S0ua eK vee vee Input pin and decoupling pin 21 IF DEC2 1.6V of IF amp. 22 | IF IN 1.6V | tsk | 15K Connect pin @ and @ 23 | IF DECI 1.6V i to GND with capacitor (0.01 | it 38K Ad) 39K: to 0,047 F). | t so 19« 24 | MIX OUT 3.8V Output pin of mixer. ME 8382383 0005680 les a —38- EEO EOE EEE een.

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a SONY: (CXA10038M/BN Note) Definition of the 3rd order intercepting point. The 3rd order intercepting point is determined by the input level of pin @) at t Ab the tangent intersection of A and B. A and I a/ LI B 1s 455 kHz component in case of 1 and 3 ; 2. In case 1, Vini 1s 80 MHz, Vinz 1s 5 8; terminated by 50 and Vins 1s 10 dBm g (| 80.455 MHz. In case 2, Vini 1s 80.06 MHz, / Vina 1s 80.12 MHz (level of Vint and Vin2 18 ’ |/_ 210 order incerceotng pot eaqual) and Vina is 10 dBm 80.455 MHz. Input level. —= Electrical Characteristics Test Circuit x f on vim Murata ‘CFS455A for 459KHr oom oon cow 4 8 5 ot buen | Lg Lael Laat Te OFF LON on Lor ‘of | a a ena FM DET B LPF GS O—® = [Exes sal eg a a a oF Fon, i seer oor i oy et sus OL 167 oav Lmdt # © elt lel i i Tt Tew 16.7 167 "00K 4004 Vw: MH Ys« TPA “pa circuit M™ 8382383 OO05bée TTS ~40- eee

SONY» CXA10038M/BN Description of Operation The signals which have been input from pins (@) and @ are mixed with the local oscillation signals from the oscillator in the mixer, and the frequency converted signal 1s output from pin @_. The oscillator is selt- oscillated by composing Colpitts type crystal oscillation circuit between pin @) and @. In addition, its possible to apply a local oscillation signal to pin @) from the external circuit. After the bandwidth is limited by BPF, the mixer output is amplified by IF amplifier and output from pin @ . The IF amplifier output is limited its bandwidth again, and amplitude fimited by the limiter and output from pin @ . The limiter amplifier output 1s phase-shifted by LC resonance circuit, etc., and audio signal 1s output from pin (and @ after being quadrature detected. The output from pin (1) can be muted by control signal from pin © The control signal 1s muting at “H” in TTL level and through at “L”. Ceramic filter Ceramic fter LC resonance circu = iF ouT = mixour| me ie an me lw [| \\IM out Jouao iN af L a | FM DET LeF fet ot = rere: = es osc IN josc out MixiNt mute| oral avoio RSS| OUT IN| ouT| OUT Current to Crystal DATA — AUDIO voltage oretivan output —ovtput conversion seu eweurt teri SSI output The RSSI output is the currents corresponding to the input levels at the IF amplifier and the limiter. It is Possible to convert a current into a voltage by connecting a proper |. V conversion circult. MM 6382383 0005683 934 MM -41- LEE...

SONY: (CXA10038M/BN z ‘ ze. $ ee a g fyi 3 b Ke 2° @- 2 ® s 24 w 4 PQ fe) @—14—_-8 | [ly © © Fg tH, © © t—+*3 me. LL gate a GLe 32 Hi +4+-@ @2 4H Ee ® 3h Bd ots Hise 3 +41! aN Ot ® @—Tn HI +4+-® © £ 3 fs 35 a ME 8362383 O005b84 870 -- en OE

SONY: ‘XA10036M/BN Note on Use CXA1003BM/BN have very high at voltage gain, so take care of the following. 1. Decouple pin @ (Vcc) and © (Vecr) with L and C as near to the pins as possible. 2. Connect pin G3 and G8 (NC) to GND. 3. Separate input line from the output line as far as possible, and make the winng short. 5. The GND impedance should be as low as possible. 6. It 1s better to separate statically the input from the output of the limiter with shielding plate. Notes on Application 1) Power supply ® © The CXA1003BM/BN have a voltage regulater [2a om] within the IC, so these have wide operating power 58 w supply range (+4.5 to +9.5V; Typ: 5.0V). There is little change in characteristics in the operating cow vee TRooty range. Decouple pin © (Vcc2) and © (Vec1) with il I | Land C. (See Fig. right) Power supply decoupling 2) Oscillator The method to use oscillator of CXA1003BM/BN is the following: {a) Method to input from pin @ with the self-excitating oscillation signal by composing @ crystal oscillation circuit of the Colpitts type to pin @ and @. (b) Method to input directly the external local oscillation signal to pin @ <Crystal oscillation circuit> The 3rd overtone crystal oscillation circut of the Colpitts type is Fig. bellow. +Ver * 1 i) I ' H ral ' on 3 ! TOT Y tank cvreut 2 \\/! f Kn Lot z a ! u. qi 1 £ @) tay] if | ' 1 ' i) com! J 1 ae i lc: i) ! y’ Zi 45K= 23K tage i i a ae i ! \\f sf | Fa on 0 | fou 1 if 1 =F Cryst = Tankeirount Colpitts type crystal oscillation circuit Reactance characteristics M® =§342383 0005685 707 MM -43- a

SONY. (CXA10038M/BN The conditions of the 3rd overtone oscillation of this oscillation circuit are the following. * The parallel resonance frequency (fe) of the tank circuit should be smaller than the 3rd oscillation frequency (3fxe\\) and the serial resonance frequency (fa) should be smaller than the basic oscillation frequency (fxtal) (3fitai>fe, fusi>fa). + The load capacitance (:Ci) of the crystal should be adequate. + The ft of the amplifier (Tr) should be sufficiently larger than 3frta. The constant 1s determined so as to satisfy these conditions. The oscillation level is set at 280 to 880 mVrms (Typ: 500 mVrms) and adjust the level by changing the resistance value (R). The slight adjustments of the oscillation frequency and oscillation level are performed with Cz and L. <In case of direct imput> In case of direct mput, connect pin @ to Vcc and input external local oscillation signal to pin @ Input level at this point 1s also 280 to 890 mVrms (Typ: 500 mVrms} 3) Mixer Mixer of the CXA10038M/BN is a double balance type. Input ports are pin@ and @, and in case of single input, input signal to pin @, and connect pin ® to GND with capacitor. It is possible to use differential input. The standard input level is — 110 to — 30 dBm (0.74 to 7.0 mVrms), and input through a suitable matching circuit. 4) Filter The band-pass filters which are connected between pin @) and @ and between pin @® and @ of the CXA1003BM/BN are desired to have the specifications as follows. + Inputioutput impedance: 1.5 kQ+ 10% + Insertion loss (center frequency): <6 d8 5) Phase shifter Input to pin @_ to shift the phase of the limiter output (pin 4 } 90° by the RLC parallel resonance circuit of the discriminator, etc. in order to quadrature FM detection. The Fig. below shows the RLC phase shifter. In this case, determine the L and C values so that the 2nd IF signal frequency and the parallel resonance frequency are the same, and the audio output level 1s determined by R value. RLC Phase shifter or Oscillator is connected between pin (3 and (@ , the phase shifted signal is input to pin @ and demodulated in quadrature detector. Lim our quaD IN REC i L RLC phase shifter MH 8382383 O005b8b b43 a —44— a

SONY. (CXA10038M/BN 6) Audio output, data output and muting The FM modulated audio or data signal 1s demodulated in the prior stage and 1s output from pin {AUDIO OUT) and @ (DATA OUT). Output from pin @_ can be muted by control signal of TTL level from pin @) (MUTE IN). (See table below.) Control signal Audio signal H (2>2.0v: Mute L ($0.8) Slew Table of muting control 7) RSSI The function of RSSI 1s to detect the input level, and output current increases monotonously within the range of IF input level —100 to 0 dBm (2.2444 to 224 mVrms). The power supply and temperature effect little on output current. However, the output current is distributed within the range of +20% due to the resistance within the IC. In case voltage output 1s required, it needs current to voltage conversion circuit composing with resistance, etc. The resistance value 1s determined by the RSS! maximum output current and the allowable maximum voltage of pin (2 . The RSSI maximum output current is approximately 60 “A (Typ: 45 4A) and the allowable maximum voltage (recommended maximum voltage) 1s Vec~1.8V, select the resistance according to the power supply and the required output voltage. In case the output voltage is required above Vcc—1.8V, amplify a voltage using an operational amplifier, etc The AMPS defines that the RSSI output voltage increases monotonously from O to 0.5V. The CXA1003BM/BN have an offset of approximately 0.3 to 0.5V (Voc =5V RL=51 kM), if it needs, utilize the offset correction circuit. Inst Vast © if Re Current to voltage conversion with resistance of RSS! output v v : Correction t ° Offset 6 i Input level Input level Offset correction of RSS! output voltage me 8382383 O005b87 S&T MM -4s- a

Mixer I/O characteristics Mixer conversion gain vs. and the 3rd order intercepting point Local input level Ee eal aco (AR « LIV TTT + LTA pe H LAT TT TTT | i VAT ane, i [AT Vy BLT TT srtcve- oe aoe oe nee Fy A 2 LT TTT TT) “ rose LOCAL input level 48m} L {| fuoeuy "80 485MNE Mixer conversion gain IF amplifier voltage gain = frequency characteristics = frequency characteristics if ETI CT) ICAI eons COCCMCE IN MCoecS PICT sees CCI ICTS TE TICE Frequency (Hz) ™ Frequency Hz) “ Limiter voltage gain Audio demodulation characteristics Fy frequency characteristics (IF IN/AUDIO OUT) tes aubio Tae c Ripeuse or ee lpenuimner .. il rh CTI § TARE] ECO | ae PUcomccmie gt ARLE 3 roy ry 108 3 “ a 44 fd yiEd | Input level (dBm) MBH 8382583 O005b88 4b 46 — cS

SONY. (CXA1003BM/BN RSSI characteristics Audio I/O characteristics {MIX IN/RSSI OUT) (TTT Tet) wr aft TTT ty att PPE ete stm | | | | AT inert aah A Leper TTT s LLY Bua fi Le AT BAT ato ot | A | 3 Val eS A i teu ter SA as 4 eee a Crh coo Oi) ‘Audio input levet (68) Input tevel {d8m1 RX-audio filter frequency characteristics (A-B; AMPS Typ.) C-message filter (BPF+DEEMP) frequency characteristics 3 1A S08 mm UT PSS ood TTT ANETTA @ WT ENT a a NT Pa PTT TTT pl CTT TTT a fA CIE TANT eA & TTT 6 MZ TT TTT NT TET ssh 1 well TTP TP UTTAT ell TTT TT Fraquefey (Mel Frequency (H2] Audio measurement circuit frequency characteristics mt TTT TTT x a a UU UATIN 7 S PM UNI TNT BUM TMI NTH © AHMET TANT TTT NZ TTI TAIT ANE TIE TT Frequency He] mm 8382383 0005689 352 MM 47_ ac

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Product Information

CXA1003BN specifications and overview.

Summary

LOW POWER FM IF AMPLIFIER

Description

CXA1003BM/BN are single-chip ICs for FM Radio such as cellular mobile, etc....

Source title CXA1003BN Datasheet(PDF) - Sony Corporation

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