LA72914V

Ordering number : ENA1859B Monolithic Linear IC LA72914V Overview FM Modulator and Demodulator IC The LA72914V is a FM modulation and demodulation IC for audio signals. And it is possible to use that for the data pulse or the control pulse, etc. Functions • Alignment-free FM modulator and demodulator of 4.5MHz. • Alignment-free FM modulator and demodulator of 6.5MHz. • ALC/ FMAGC, Emphasis/ De-emphasis • Carrier frequency adjustment function, Standby switch Specifications Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Pd max Topr Tstg Ta ≤ 70°C * Conditions Ratings 7.0 300 -20 to +70 -40 to +150 Unit V mW °C °C When mounted on a 114.3mm × 76.1mm × 1.6mm, glass epoxy. Recommended Operating Conditions at Ta = 25°C Parameter Recommended supply voltage Allowable operating voltage range Symbol VCC VCC op Ta=25°C Ta = -20 to +70°C Conditions Ratings 5.0 4.7 to 5.5 Unit V V Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer' s products or equipment. D0110 SY 20101118-S00005/N0410 SY/O2710 SY 20101008-S00006 No.A1859-1/9 LA72914V Electrical Characteristics at Ta = 25°C, VCC = 5V DC Characteristic Parameter 2.4V regulator Current dissipation Symbol VREG ICC1 ICC2 Control pin (6 pin) Low level Control pin (6 pin) Middle level Control pin (6 pin) High level AGC stop at pin 11 control voltage TX OFF mode at pin 16 control voltage CNT16L Voltage of input pin (pin 16) in TX off mode 0 0.4 V AGCS Voltage of input pin (pin 11) in AGC stop 4.5 5.0 V CNT6H High level of input pin (6pin) in 6.5MHz TX mode. 4.5 5.0 V CNT6M Middle level of input pin (6pin) in stand-by mode. 2.0 3.0 V CNT6L Conditions min Ratings typ 2.4 33.0 2.5 max 2.6 40.0 3.0 0.4 V mA mA V Unit Measure the DC voltage at pin 2 Measure the current into pin 4 in normal mode. Measure the current into pin 4 in stand-by mode. Low level of input pin (6pin) in 4.5MHz TX mode. 2.2 26.0 2.0 0 Sound FM Modulation Block (TX) Parameter FM carrier output frequency FM carrier output level Symbol FFM1 FFM2 VOFM1 VOFM2 FM carrier output second harmonics distortion 2HD1 2HD2 VFMT DEV FEMP Conditions Output frequency of T1B in no signals. T6=0.6V, T14:open Output frequency of T1B in no signals. T6=4.2V, T14:open Output level of T1B in no signals. Load impedance = 1kΩ T1-GND. T6=0.6V Output level of T1B in no signals. Load impedance = 1kΩ T1-GND. T6=4.2V 2nd harmonics distortion of T1B in no signals. Load impedance = 1kΩ T1-GND. T6=0.6V 2nd harmonics distortion of T1B in no signals. Load impedance = 1kΩ T1-GND. T6=4.2V FM carrier output mute level FM deviation Emphasis Characteristic ALC characteristic Output level of T1B in TX off mode. T6=0.6V (4.2V) FM deviation of T1A, T6=0.6V (4.2V), input at T16=1.0Vp-p/1kHz (sine) T16=200mVp-p, 1kHz (sine), M1=T1 output deviation. T16=200mVp-p, 5kHz (sine), M2=T1 output deviation. FEMP=M2-M1 T16A=0.25Vp-p, 1kHz (sine), T3:Open, T6=0.6V, T3 output level T16A=0.6Vp-p, 1kHz (sine), T3:Open, T6=0.6V, T3 output level T16A=1.0Vp-p, 1kHz (sine), T3:Open, T6=0.6V, T3 output level No signal input. Measure T1B frequency. T16:Open, T6=0.6V (4.2V), T14=0.5V No signal input. Measure T1B frequency. T16:Open, T6=0.6V (4.2V), T14=4.5V 20 7 -60 25 12 -50 30 17 dB kHz kHz -30 -20 dB -30 -20 dB 1.3 1.7 2.1 Vp-p Ratings min 4.455 6.435 1.9 typ 4.500 6.500 2.3 max 4.545 6.565 2.6 Unit MHz MHz Vp-p ALC1 ALC2 ALC3 0.45 0.9 0.95 0.5 1.0 1.05 -0.22 +-.22 0.55 1.1 1.15 Vp-p Vp-p Vp-p MHz MHz FM carrier “fo” adjustment (reference) FCNT1 FCNT2 Sound FM demodulation block (RX) Parameter Sound demodulation level Symbol VOUT1 Conditions Input signal: CAR=4.5MHz, DEV=±25kHz, MOD=1kHz, Level: 100mVp-p. T5A input. Measure T9B signal level. (T9B-GND: ROUT=10kΩ) T6=4.2V VOUT2 Input signal: CAR=6.5MHz, DEV=±25kHz, MOD=1kHz, Level: 100mVp-p. T5A input. Measure T9B signal level. (T9B-GND: ROUT =10kΩ) T6=0.6V S/N SN1 Input signal: CAR=4.5MHz, No-modulation. Level: 100mVp-p. T5A input. T6=4.2V, (IHF-A) M1=T9B signal level. (T9B-GND: ROUT =10kΩ) SN1=20log(VOUT1/M1) Input signal: CAR=6.5MHz, No-modulation. Level: 100mVp-p. T5A input. T6=0.6V, (IHF-A) M1=T9B signal level. (T9B-GND: ROUT =10kΩ) SN1=20log(VOUT2/M1) 35 50 dB 0.7 1.0 1.4 Vp-p Ratings min 0.6 typ 0.9 max 1.3 Unit Vp-p SN2 35 50 dB Continued on next page No.A1859-2/9 LA72914V Continued from preceding page. Parameter THD Symbol THD1 THD2 De-emphasis characteristic DEEM1 Conditions Same condition VOUT1. Measure T9B signal. Same condition VOUT2. Measure T9B signal. Input signal: CAR=4.5MHz, DEV=±25kHz, MOD=5kHz, Level: 100mVp-p. T5A input. T6=4.2V, M1=T9B signal level. DEEM=20log(M1/VOUT1) Input signal: CAR=6.5MHz, DEV=±25kHz, MOD=5kHz, Level: 100mVp-p. T5A input. T6=0.6V, M1=T9B signal level. DEEM=20log(M2/VOUT2) T11=4.5V, T6=4.2V, T5A=4.5MHz, 100mVp-p. T12A=A1. T5A=6.5MHz. 100mVp-p. T12A=B1. TRP1=20log(B1/A1) T11=4.5V, T6=0.6V, T5A=4.5MHz, 100mVp-p. T12A=A1. T5A=6.5MHz. 100mVp-p. T12A=B1. TRP2=20log(A1/B1) T6=4.2V. T5A=4.5MHz, 300mVp-p. Measure T12 signal level. T6=0.6V. T5A=6.5MHz, 300mVp-p. Measure T12 signal level. T6=4.2V. T5A=4.5MHz, 30mVp-p. Measure T12 signal level. T6=0.6V. T5A=6.5MHz, 30mVp-p. Measure T12 signal level. T6=4.2V. T11=4.5V, T5A=4.5MHZ, 100mVp-p. Measure T12 signal level. AGCSTP2 FM input sensitivity FMIN1 T6=0.6V. T11=4.5V, T5A=6.5MHz, 100mVp-p. Measure T12 signal level. Input signal: CAR=4.5MHz, DEV=±25kHz, MOD=1kHz, T6=4.2V. When T9B signal is OK, then measure T5A FM input level range. Input signal: CAR=6.5MHz, DEV=±25kHz, MOD=1kHz, T6=0.6V. When T9B signal is OK, then measure T5A FM input level range. 30 100 300 mVp-p 70 100 140 mVp-p 250 250 200 200 70 Ratings min 0 0 -10 typ 0.3 0.3 -7.5 max 1.0 1.0 -5 Unit % % dB DEEM2 -10 -7.5 -5 dB Trap-filter characteristic TRP1 TRP2 -20 -20 350 350 300 300 100 -15 -15 450 450 400 400 140 dB dB mVp-p mVp-p mVp-p mVp-p mVp-p FM AGC characteristic AGC1 AGC2 AGC3 AGC4 FM AGC STOP characteristic AGCSTP1 FMIN2 30 100 300 mVp-p Package Dimensions unit: mm (typ) 3178B 5.2 16 9 4.4 6.4 1 0.65 (0.33) 8 0.15 0.22 1.5max SANYO : SSOP16(225mil) 0.1 (1.3) 0.5 No.A1859-3/9 LA72914V Pin Layout and Measurement circuit Sign: Highly accurate part use T1B T1 T16 FM_out 1 FM_out T2 Audio_in /TX_CTL 16 ALC filter 15 T16A AUDIO_IN T15 T3 VREG filter 2 (2.4V) Emphasis 3 filter + T14 VCO_CTL 14 GND 13 FMAGC 12 monitor T12 FMAGC_OUT T11 Power supply (VCC) 5V A T5 T5A FM_IN T6 4 VCC(5V) 5 FM_IN MODE_CTL T7 De-emphasis T8 Mode control 6 (TX,RX/STBY) AGC filter 11 7 De-emphasis filter FM filter 10 + + T9B T10 T9 GND De-emphasis 8 Audio_in Audio_out 9 + Top view Block Diagram and Application Circuit TX control (High:TX-OFF /Low:TX-ON) ALC Filter VCO Auto tune FMAGC-OUT Monitor AGC Filter FM Filter Audio-OUT (1Vp-p) 16 15 14 13 12 11 FMAGC-DET Phase Detector VCO 6.5M/4.5M Mode & Standby Control T4R6/STBY/T6R 10 9 Bias 2.4V 6dB AMP ALC (1.0Vp-p) 10k LPF Emphasis FMAGC 6dB-AMP DRIVER Loop Filter Offset Cancel De-emphasis FMMOD FM-AMP DRIVER 1 VCO 4.5M/6.5M VREG 2.4V 2 6800pF TRP 4.5M/6.5M 3 4 1000pF Bias 2.4V 6 7 8 5 BPF FM-OUT (2Vp-p) Ripple Filter Emphasis Filter VCC(5V) FM-IN (0.1Vp-p) State control T6R4:P-Up STBY:Open T4R6:P-Down De-emphasis Filter : Push-pull output + + + No.A1859-4/9 LA72914V Pin Description Pin No. 1 Pin Name FM OUT Description 4.5MHz or 6.5MHz FM carrier output. Push-pull output pin. Output level is 2.5Vp-p (Load resistance=1kΩ) Equivalent circuit 1 2 2.4V REG Filter Internal regulator filter pin. Please connect 0.1μF (C1) 4V VCC 2 C1 3 Emphasis Filter Emphasis filter pin. Before FM modulation, make emphasis Characteristic at audio signal. C1(6800pF) Emphasis time constant must be matching de-emphasis time constant. (If you don’t need the emphasis, this pin is open.) 3 C1 4 VCC VCC pin. Supply voltage is 5V DC. Please connect de-coupling capacitor. (about 47μF) FM signal input. Please use capacitor coupling. 5 FM IN C1 SIG 5 2.4V 6 Mode CTL MODE control pin. Control modulation frequency TX=4.5MHz: 0 to 0.4V Stand-by: 2.0 to 3.0V TX=6.5MHz: 4.5V to VCC 6 Continued on next page. No.A1859-5/9 LA72914V Continued from preceding page. Pin No. 7 Pin Name De-emphasis Filter Description De-emphasis filter pin. De-emphasis time constant must be matching at emphasis time constant. Recommend value is 6800pF to 0.01μF. Connect Cap. Coupling to pin8. Equivalent circuit SIG C1 7 8 RX Audio IN Internal DC bias is 2.4V. Please connect Cap. coupling. 8 C1 2.4V 9 Audio OUT Audio signal output pin. Push-pull output pin. Output level is 1.0Vp-p at 1kHz. (Load resistance=10kΩ) 9 10 FM Filter FM demodulator filter pin. Please connect 1.0μF capacitor. (If you need rising of low frequency gain, then change more large capacitor in use.) 10 11 AGC Filter FM AGC filter pin. Please connect 0.1μF capacitor. If you need reduce AGC-gain, then connect resistor (R1: 11pin-VCC) If FM AGC no need, please set pin11 voltage over 4.5V DC voltage. AGC-DET R1 11 C1 Continued on next page. No.A1859-6/9 LA72914V Continued from preceding page. Pin No. 12 Pin Name AGC monitor FM AGC monitor pin. Description Equivalent circuit 12 13 GND GND pin. 14 VCO CTL Modulation frequency fine control pin. Adjustment frequency is, about ±220kHz at 0.5V to 4.5V DC. VR1 14 C1 2.4V 15 ALC CTL Audio ALC filter pin. Please connect 0.47μF capacitor. 15 C1 16 TX Audio IN (TX-OFF_CTL) Audio signal input pin. Internal bias is 2.4V DC. Please use capacitor coupling. If DC voltage set to under 0.4V DC, then modulator circuit stops. Demodulation circuit is work. This is receiving only mode. (TX-OFF: 0 to 0.4V) C1 16 2.4V Signal processing outline [Modulation block] • Audio signal is input from pin16. (Internal bias is DC 2.4V.) Go through AMP (6dB)/ALC/LPF (10 kHz) and emphasis circuit, then input FM-modulation block. After FM-modulation block, go to output driver block then FM-audio signal output from pin1. • ALC: ALC circuit work at pin16 input level over than 0.5Vp-p. • LPF: LPF gain is -3dB at 10 kHz and -6dB/oct. Keep over modulation from emphasis characteristic. • Emphasis circuit: The pin3 owns an Emphasis characteristic which connected capacitor. Recommended value = 6800pF. • FM modulation: Carrier frequency is choosing from pin6 voltage. When pin16 input level is 0.5Vp-p, then FM deviation set to ±25 kHz. Internal LPF reduce harmonic spectrum. • Output Driver: Output AC voltage is about 2.0Vp-p. (Load resistance: 1kΩ) No.A1859-7/9 LA72914V [De-modulation block] • Demodulate audio signal from modulated audio signal. • FM-Audio signal is input from pin5. Go through 4.5M-Trap-filter or 6.5MHz-Trap-filter and AGC go to demodulator. After demodulator go to De-emphasis circuit. After de-emphasis circuit signal is output pin7. Pin7 signal is charge to DC bias for coupling capacitor at pin8. Audio signal from pin8 go to 6dB AMP then output from pin9. (Door-phone application, there are two FM carrier. In this case we recommend add BPF before pin5 FM-Audio signal input.) • 4.5M/6.5MHz-Trap-filter: Internal Trap-filter is change for pin6 mode control. (If modulator frequency is 4.5MHz, then internal Trap-filter is 4.5MHz.) • AGC: After AGC level is control about 0.3Vp-p. After AGC signal go to pin12 FM-monitor and de-modulator. • De-emphasis circuit: The pin7 owns an De-emphasis characteristic which connected capacitor. Recommended value = 10nF. • Output signal level: If input FM signal deviation is ±25 kHz, then output signal level is 1Vp-p (TYP) from pin9/ (Load resistance: 10kΩ at 1 kHz.) Characteristics ALC characteristics FMAGC characteristics fo=4.5MHz (unmodulated signals) 2000 500 2500 600 Internal level of IC, [mVp-p] 6dB 1500 Output level, [mVp-p] 400 Pin 12 300 1000 Pin 9 ALC Pin 16 200 500 100 0 0 200 400 600 800 1000 1200 0 1 10 100 1000 10000 Input level, [mVp-p] 3 Input level, [mVp-p] Frequency responce TxIn-RxOut 0 Output level, [dB] -3 -6 -9 -12 -15 0.01 0.1 1 10 100 Frequency, [kHz] No.A1859-8/9 LA72914V Application example WIRE BPF 4.5MHz RX 4.5MHz MIC LA72914V (pin6:High) LPF 6.5MHz TX 6.5MHz LPF 4.5MHz TX 4.5MHz BPF 6.5MHz RX 6.5MHz LA72914V (pin6:Low) MIC [Above-mentioned recommendation BPF] Made by Murata Mfg.: SFSKA4M50DF00 (4.5MHz)/SFSKA6M50CF00 (6.5MHz) SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. 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SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of Novenber, 2010. Specifications and information herein are subject to change without notice. PS No.A1859-9/9