TA2154AFN TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA2154AFN 1.5 V 1 Chip Tuner IC (for Digital Tuning System) TA2154AFN is developed for 1.5 V headphone stereos. It incorporates all the functions of an FM/TV front end, AM/FM IF, and FM multiplex. The IC can be used for IF count digital tuning systems. Since the IC divides the buffer output frequency by 16 while suppressing the FM/TV local oscillation level, the IC can suppress unnecessary emission, facilitating conformance to the new FCC specifications (part 15). Features · FM/TV local oscillator level is low (Built-in auto level control circuit) · Suitable for combination with digital tuning system, which is included IF counter. · · · Weight: 0.17 g (typ.) One terminal type AM/FM IF count output for IF counter of digital tuning system. · AM: 450 kHz · FM: 10.7 MHz One terminal type FM/TV local oscillator. Local oscillator buffer output terminal shared by AM, FM and TV · AM: 1/1 · FM: 1/32 · TV: 1/8 · For adopting ceramic discriminator, it is not necessary to adjust the FM quad detector circuit. · Built-in FM MPX VCO circuit. · Low supply current (VCC = 1.2 V, Ta = 25°C) Iccq (AM) = 5.0 mA (typ.) Iccq (FM) = 13.0 mA (typ.) Iccq (TV) = 13.5 mA (typ.) · Operating supply voltage: VCC = 1.0~2.2 V (Ta = 25°C) · Monaural operating supply voltage: VCC = 0.95~2.2 V (Ta = 25°C) 1 2002-10-21 TV RF 2 29 FM RM AM BYPASS RF GND FM RF OUT FM RF IN 3 28 27 4 FM/TV MIX AM MIX AM RF IN FM MIX TV RF OUT TV RF IN BPF 1 30 5 26 RFVCC AM MIX 25 6 AGC BUFF AM OSC AM OSC AGC 24 7 IF OUT 19 IF REQ 20 MODE SW1 21 MODE SW2 22 OSC OUT 23 2 8 FM IF 1/8 or 1/16 BUFF BUFF FM TV OSC OSC 1/2 TV FM OSC VCC OSC OUT FM IF IN 9 10 AM IF AM DET FM/AM/TV PW SW IF BUFF MODE2 GND 11 FM DET LEVEL DET 12 AF SW IF COUNT DET OUT VT LPF2B 17 14 FM MPX MONO 13 18 STEREO MPX IN MODE1 AM IF IN IF REQ QUAD LPF2A LPF1 Block Diagram R OUT 15 16 L OUT L OUT R OUT VCC 2002-10-21 TA2154AFN TA2154AFN Explanation of Terminals Terminal voltage: Typical terminal voltage at no signal with the test circuit (VCC = 1.2 V, Ta = 25°C) Pin No. Name Function Terminal Voltage Internal Circuit AM FM TV 0 0 0.1 0 0.1 0 0 0 0 ¾ 0.5 0.5 0.6 ¾ ¾ 0 0 0 1.2 1.2 1.2 TV RF OUT 30 TV RF IN Input of TV RF signal 100 9 1 60 pF 1 RF GND 3 FM RF OUT 29 FM RF IN Input of FM RF signal 100 9 2 RF GND 3 3 RF-GND 60 pF 2 ¾ GND (GND for TV/FM stage) 7 VCC 4 FM MIX Output of TV/FM signal TV/FM MIX 220 W 4 3 RF GND VCC 7 14 kW 5 AM MIX 3 kW Output of AM IF signal 5 14 kW AM MIX GND 9 IF 6 AGC AGC · AGC time constant is determined by external capacitor FM AM 6 7 VCC VCC (VCC for AM, FM IF, MPX stage) ¾ 3 2002-10-21 TA2154AFN Pin No. Name Function Terminal Voltage Internal Circuit AM FM TV ¾ 0.7 0.7 0 0 0 1.2 1.2 1.2 1.2 1.1 1.1 0.6 0.8 0.8 0.1 0.1 0.1 VCC 7 8 FM IF IN Input of FM IF signal Input impedance: 330 W (typ.) 8 330 W GND 9 9 GND GND (GND for AM, FM IF, MPX stage) ¾ 10 AM IF IN Input of AM IF signal Input impedance: 3 kW (typ.) 3 k9 3 k9 VCC 7 10 GND 9 1 k9 7 VCC 11 11 QUAD FM QUAD detector 9 GND 7 VCC 12 DET OUT Detector output Output impedance AM: 4 kW (typ.) FM: 500 W (typ.) 34 kW 3.5 kW 500 W 12 AM DET FM DET. 9 7 VCC Input of MPX 41 kW 13 4 58.5 kW 3.4 k9 MPX IN 5 k9 13 9 GND 2002-10-21 TA2154AFN Pin No. Name Function Terminal Voltage Internal Circuit AM FM TV ¾ ¾ ¾ 0.5 0.5 0.5 ¾ ¾ ¾ ¾ ¾ ¾ 1.2 1.2 1.2 ¾ ¾ ¾ LPF terminal for PLL phase detection. 14 15 LPF1 Connecting this terminal to GND sets the IC to forced Monaural mode. 14 VCC 7 R OUT 16 L OUT 17 LPF2A 15/16 10 k9 Output of Stereo signal 9 VCC 7 13 100 kW 39 kW 100 kW 39 kW LPF terminals for synchronous detector 18 GND 9 LPF2B 19 IF COUNT 2 k9 VCC 7 2 k9 17 100 W Output of IF count signal AM: 450 kHz FM: 10.7 MHz 18 19 GND 9 Request sensitivity controller IF request switch 20 5 500 9 IF REQ 2.4 k9 20 9 GND 2002-10-21 TA2154AFN Pin No. Name Function Terminal Voltage Internal Circuit Standby: AM: FM: TV: MODE2 OPEN VCC OPEN VCC 23 OSC OUT 1 k9 1 k9 9 RFVCC 26 FM PSC Local oscillation buffer output 40 k9 MODE1 OPEN OPEN VCC VCC FM TV ¾ 1.2 1.2 1.2 ¾ 1.2 1.0 1.0 1.0 1.2 1.2 1.2 1.2 1.2 1.2 ¾ ¾ ¾ 0.9 ¾ ¾ 0.9 ¾ ¾ 22 MODE SW 2 k9 MODE2 Mode switch 2 k9 22 MODE1 40 k9 21 21 AM VCC 7 23 AM PSC RF GND 3 GND 9 24 26 RFVCC 24 ALC TV/FM OSC TV/FM OSC 3 RF GND 25 AM OSC AM OSC 200 9 25 200 9 7 VCC 9 GND 26 RFVCC VCC for TV/FM F/E stage 27 AM RF IN Input of AM RF signal ¾ VCC 7 AGC 28 AM BYPASS Referential voltage bypass terminal for AM RF 28 AGC 1 k9 27 AGC GND 9 29 FM RF OUT FM RF turning circuit Cf. pin 2 1.2 1.2 1.2 30 TV RF OUT Cf. pin 1 1.2 1.2 1.2 TV RF turning circuit 6 2002-10-21 TA2154AFN Application Note 1. Mode switch The IC controls the mode using pins 21 and 22. Switch conditions by modes are as listed below: MODE1 (pin 21) MODE2 (pin 22) Standby OPEN OPEN AM OPEN VCC FM VCC OPEN TV VCC VCC To change mode, a 10 mA (typ.) current must flow from the IC to the pin connected to VCC. When the pin is open, set the pin voltage to 0.2 V or less (typ.). 2. Forced monaural switch Forced monaural switch over is done by pin 14. In case of the electrical switch over by transistor, set up VCE (saturation voltage between collector and emitter) 100 mV or less, otherwise there are some cases that it does not become forced monaural (VCO STOP) mode. VCE (sat) VCC 14 3. IF count output To output the signal for IF count, connect IF REQ (pin 20) to GND via RSEN and input the IF count sensitivity or larger. Switch Condition AM MODE1 MODE2 OPEN VCC FM VCC OPEN TV VCC VCC Output Frequency Output Voltage 450 kHz 180 mVp-p 10.7 MHz 190 mVp-p 10.7 MHz 190 mVp-p IF REQ Grounded via RSEN Output Impedance 2 kW 4. Constant of LPF Caputer range and Lock range is decided by constant of LPF, pin 14, 17, 18. Care should be taken in changing constant of LPF. Otherwise there are some cases that stereo characteristics may worse or IC may not operate stereo mode. 5. TV/FM local oscillator This IC uses the same oscillator for TV and FM. The circuit structure is shown below. In TV mode, the IC inputs the local oscillator frequency to the mixer as-is. In FM mode, the IC halves the local oscillator frequency then inputs it to the mixer. This is how the IC receives TV and FM band frequencies. TV MIX 24 23 OSC BUFF When TV is on FM MIX When FM is on 1/2 divider 1/4 divider 7 TV FM 1/4 divider 2002-10-21 TA2154AFN Maximum Ratings (Ta = 25°C) Characteristics Supply voltage Power dissipation Symbol Rating Unit VCC 4.5 V 550 mW PD (Note 2) Operating temperature Topr -10~60 °C Storage temperature Tstg -55~150 °C Note 2: Derated above Ta = 25°C in the proportion of 4.4 mW/°C. Electrical Characteristics Unless otherwise specified mV EMF : VCC = 1.2 V, Ta = 25°C, FM F/E: f = 98 MHz, fm = 1 kHz, Df = ±75 kHz, Vin = 60dBm mV EMF FM IF: f = 10.7 MHz, fm = 1 kHz, Df = ±75 kHz, Vin = 80dBm mV EMF AM: f = 1000 kHz, fm = 1 kHz, MOD = 30%, Vin = 60dBm MPX: fm = 1 kHz, fp = 19 kHz Symbol Test Circuit ICC1 ¾ PW SW off ICC2 ¾ AM mode, Vin = 0 5.0 7 ICC3 ¾ FM mode, Vin = 0 13.0 17 ICC4 ¾ TV mode, Vin = 0 13.5 17 Vin (lim) ¾ Point where detection output is -3dB with Vin = 60dBmV EMF as reference ¾ 12 ¾ dBmV EMF Vosc (Buff) FM ¾ fosc = 6.79375 MHz (217.4 MHz divided by 32) 150 200 ¾ mVp-p Vin (lim) ¾ Point where detection output is -3dB with Vin = 60dBmV EMF as reference Vosc (Buff) TV ¾ fosc = 26.3375 MHz (210.7 MHz divided by 8) Vin (lim) ¾ Recovered output voltage VOD (FM) Signal to noise ratio 1 Characteristics Supply current Input limiting voltage FM F/E Local OSC buffer output voltage Typ. Max Unit 20 mA mA dBmV EMF 150 200 mVp-p Point where detection output is -3dB with Vin = 80dBmV EMF as reference 37 42 47 dBmV EMF ¾ ¾ 115 140 180 mVrms S/N (FM) ¾ ¾ ¾ 73 ¾ dB Total harmonic distortion 1 THD (FM) ¾ ¾ ¾ 0.2 ¾ % AM rejection ration AMR (FM) ¾ ¾ 62 ¾ dB VIF (FM) ¾ 150 190 ¾ mVp-p IFSENS (FM) ¾ RSEN = 3.3 kW 48 53 58 dBmV EMF Gv ¾ Vin = 32dBmV EMF 19 29 51 mVrms Recovered output voltage VOD (AM) ¾ ¾ 27 40 54 mVrms Signal to noise ratio 2 S/N (AM) ¾ ¾ ¾ 37 ¾ dB Total harmonic distortion 2 THD (AM) ¾ ¾ ¾ 13 ¾ % Local OSC buffer output voltage Vosc (Buff) AM ¾ 130 180 ¾ mVp-p IF count output voltage VIF (AM) ¾ 140 180 ¾ mVp-p IFSENS (AM) ¾ 27 32 37 dBmV EMF TV F/E Local oscillator buffer output Input limiting voltage IF count output voltage IF count sensitivity Gain AM Min 14 Input limiting voltage FM IF Test Condition IF count sensitivity MOD = 30% ¾ fosc = 14.5 MHz ¾ RSEN = 3.3 kW 8 2002-10-21 TA2154AFN Characteristics Input resistance Output resistance Voltage gain Channel balance Symbol Test Circuit Test Condition Min Typ. Max RIN ¾ ¾ ¾ 26 ¾ ROUT ¾ ¾ ¾ 10 ¾ Gv ¾ -2.5 -0.5 +1.5 dB C.B. ¾ -2.0 0 +2.0 dB ¾ 250 ¾ mVrms fm = 100 Hz ¾ 40 ¾ fm = 1 kHz 30 40 ¾ fm = 10 kHz Vin = 150 mVrms (MONO) Vin (max) ¾ SEP. ¾ L+R= 135 mVrms, P = 15 mVrms ¾ 40 ¾ THD (MONO) ¾ Vin = 150 mVrms (MONO) ¾ 0.2 ¾ ST THD (ST) ¾ L + R = 135 mVrms, P = 15 mVrms ¾ 0.4 ¾ ON ST (ON) ¾ ¾ 5.7 8.5 mVrms OFF ST (OFF) ¾ Separation MPX MONO ST indicator sensitivity kW L + R = 90%, P = 10%, THD = 3% Max composite signal input level Total harmonic distortion Unit ¾ dB % 1.0 3.2 ¾ mVrms ¾ 2.5 ¾ mVrms VH ¾ To indicator turn OFF from turn ON Capture range C.R. ¾ P = 15 mVrms ¾ 14 ¾ % Signal to noise ratio S/N3 ¾ Vin = 150 mVrms (MONO) ¾ 70 ¾ dB Stereo indicator hysteresis 9 2002-10-21 TV/FM RF IN BPF L2 75 W VCC 1 30 RFVCC L1 2 29 3 28 2.7 mH 2 kW 4 5 26 FM IF IN 27 270 W 6 25 7 OSC OUT 23 22 0.033 mF 8 10 9 TA2154AFN 24 RFVCC MODE SW 10 21 IF REQ 11 20 fvco MON 3.3 kW 0.022 mF CR AM RF IN TV RF OUT TV RF IN FM RF OUT FM RF IN 0.033 mF AM BYPASS RF GND AM RF IN FM MIX RFVCC AM MIX T1 AM OSC AGC 4.7 mF L3 TV FM OSC VCC MODE2 MODE1 CF2 0.01 mF OSC OUT FM IF IN MODE1 AM IF IN 10 pF CF1 IF REQ QUAD 12 19 IF OUT fvco MPX IN 14 15 16 L OUT R OUT MONO/ST GND/OPEN PHASE 13 PILOT 0.1 mF 18 17 0.01 mF 0.068 mF 1 kW MODE2 GND IF COUNT DET OUT 680 pF LPF2B MPX IN 10 mF LPF2A LPF1 1 kW Test Circuit 0.47 mF L OUT R OUT 4.7 mF 0.033 mF VCC DET 2.4 kW OUT VCC2 = 5 V BPF: GTVS05 Soshin Electric Co., Ltd. CF1: SFE10.7MA5 Murata Co. Ltd. CF2: PFS450A Murata Co. Ltd. CR: CDALA10M7GA113 - BO Murata Co. Ltd. 220 mF 2.2 kW 68 kW 68 kW 2.2 mF 4.7 mF 4700 pF 4700 pF TA2154AFN 2002-10-21 0.022 mF 22 kW TA2154AFN Coil Data Test Frequency L (mH) Co (pF) Q0 L1 FM RF 100 MHz ¾ ¾ L2 TV RF 100 MHz ¾ L3 TV/FM OSC 100 MHz T1 AM OSC 796 kHz Coil L1: FM RF Turns 1-2 2-3 1-3 4-6 Wire (mmf) 79 ¾ ¾ 2 1 2 ¾ 0.16UEW TOKO 666SNF-305NK ¾ 73 ¾ ¾ 1 1 4 ¾ 0.16UEW TOKO 666SNF-381NK ¾ ¾ 73 ¾ ¾ 1 1 4 ¾ 0.16UEW TOKO 666SNF-381NK 268 ¾ 65 19 95 ¾ ¾ 0.05UEW TOKO 5PNR-4957Y L2: TV RF L3: TV/FM OSC T1: AM OSC Pin 25 3 3 3 3 4 2 1 1 1 1 6 VCC (BOTTOM VIEW) 11 2002-10-21 TA2154AFN Package Dimensions Weight: 0.17 g (typ.) 12 2002-10-21 TA2154AFN RESTRICTIONS ON PRODUCT USE 000707EBA · TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products 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 TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc.. · The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk. · 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. · The information contained herein is subject to change without notice. 13 2002-10-21