DESCRIPTION The is a low operation voltage FM IF detector IC. It includes IF circuit, FM detector circuit, RSSI circuit, and noise detector circuit. It is suitable for cordless phones. FEATURES Operating frequency: 1M ~ 1MHz Low-voltage operation Excellent temperature characteristic High sensitivity High intercept point Small package used Built in nd MIX APPLICATIONS Cordless phones. Amateur short wave radios Portable wireless equipment BLOCK DIAGRAM Copyright 1
PIN DESCRIPTION PIN NO. PIN NAME FUNCTION 1 OSCI Local oscillator input pin OSCO Local oscillator output pin 3 MIXO Mix output pin, connect ceramic filter 4 VCC Power supply 5 IF IN IF amplifier input pin 6 DEC IF amplifier bypass pin 7 FILO Filter amplifier output pin 8 FILI Filter amplifier input pin 9 AFO Demodulated signal output terminal 1 QUAD Phase shift signal input terminal of FM demodulator 11 IF OUT IF amplifier output pin 1 RSSI RSSI output pin 13 NDET Noise comparator output pin 14 NDO Noise detector output pin 15 GND GND pin 16 MIXI Mixer input pin Copyright
ABSOLUTE MAXIMUM RATING Ta=5 SYMBOL PARAMETER RATINGS UNIT Vcc Power supply voltage 7 V Pd Power dissipation 35* mw Topr Operating temperature -3~+85 Tstg Storage temperature 55~+15 *Reduced by 3.5mW for each increase in Ta of 1 over 5. ELECTRICAL CHARACTERISTICS Ta=5, Vcc=.V, fin(mix)=1.7mhz, f IN(IF) =45 KHz, f=±1.5khzdev, fm=1 KHz, all AC levels open (EMF) display LIMITS SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNIT I Q Quiescent current No input.1 3. 4. ma G VC Conversion gain Tested after ceramic filter(-3db loss) 15 18 1 db I P Intercept point --- -11 --- dbm R IN Input impedance --- 5.5 --- kω C IN Input impedance --- 4.6 --- pf R O Output impedance 1. 1.8.4 kω S 1dB SINAD sensitivity --- 8 --- dbµv V O FM detector output V IN ( IF ) =8dBµV 79 1 16 mvrms S/N Signal-to-noise ratio V IN ( IF ) =8dBµV 43 63 --- db ARM AM rejection ratio V IN ( IF ) =8dBµV, AM=3% --- 4 --- db R IN Input resistance 1. 1.8.4 kω V RSSI1 RSSI output voltage V CC =3V, V IN ( IF ) =5dBµV.7 1. 1.45 V V RSSI RSSI output voltage V CC =3V, V IN ( IF ) =1dBµV 1.6.3.9 V V NDET Output voltage V NREC =.V, I SINK =.ma ---.1.5 V I LEAK Output leakage current V NREC =.7V, V NDET =V, --- 5 µa V TH-H Noise detection high level Pin 14 voltage so that V NDET.5V.5.6.7 V Copyright 3
SYMBOL PARAMETER TEST CONDITIONS V TH-L Hys Noise detection low level Noise detection hysteresis width Pin 14 voltage so that I SINK 5µA Hysteresis width between V TH-H and V TH-L above LIMITS UNIT MIN TYP MAX.5.6.7 V. 3.5 5. db CHARACTERISTIC DIAGRAM Mixer Frequency Characteristics Mixer Conversion Gain vs. Power Supply Voltage Vcc Mixer Frequency Characteristics Mixer Gain vs. Vcc 18 18 Mixer Conversion Gain GVC (db) 16 14 1 1 8 6 4 Mixer Conversion Gain (db) 16 14 1 1 8 6 4 1 1 Input Frequency Fin (MHz) 1 3 4 5 6 7 Power Supply Voltage Vcc (V) 1 Mixer Conversion Gain GVC, (db) 4 16 1 8 4 Mixer Conversion Gain vs. Local OSC Injection Level Mixer Gain, GVC Mixer Output Level (dbuv) 11 1 9 8 7 6 5 Mixer Intercept Point Characteristics TA31136 7 8 9 1 11 1 Local OSC Injection Level (dbuv) 4 3 4 5 6 7 8 9 1 Input Level Vin (dbuv) 3 Copyright 4
IF AMP Gain (db) 8 78 76 74 7 7 IF AMP Gain Frequency Characteristics IF AMP Gain (db) Vcc=.V Input Condition: IFin = 5KHz, 6 dbuv, Vcc=.V IFOUT Waveform 68 66 64 6 6 1 1 1 Input Frequency (KHz) 6 7 IF Input Detuning Characteristics IF AMP Input Demodulation Characteristics AFOUT DC Level Voltage (V). 1.8 1.6 1.4 1. 1..8.6.4.. S Curve 1 6 6 1 Detuning Frequency (KHz) Vcc=.V 45KHz Demodulation S + N, N ARM (db) 1.. 1.. 3. 4. 5. 6. 7. 8. S + N AMR (AM 3%) N 4 6 8 1 1 IF Input Level Vin (dbuv EMF) 9 5 Copyright 5
IF Input Detuning Characteristics AFOUT Amplitude vs. Powe Supply Voltage Vcc THD & Detuning (db) 5 1 15 5 3 35 4 45 5 Detuning THD Demodulated Output Level, mvpp 9 8 7 6 5 4 3 AFOUT, mvpp 55 6 1 6 6 1 Detuning Frequency (KHz) 1 1 3 4 5 6 7 Power Supply Voltage Vcc (V) 6 7 RSSI Characteristics vs. Mixer Input RSSI Characteristics vs. IF Input.4 RSSI Output Voltage V RSSI (V).4 1.6 1..8.4 VCC = 3V VCC=V RSSI Output Voltage V RSSI (V) 1.6 1..8.4 VCC = 3V VCC=V 4 6 8 1 Mixer Input Level Vin (dbuv EMF) 4 6 8 1 1 IF Input Level Vin (dbuv EMF) 8 13 Copyright 6
1. Noise Detection Characteristics Noise Detection Frequency Characteristics N DET (= High) 1. N REC Output Voltage (V).8.4 N REC Noise Detector Sensitivity (mvrms) 1. 1. 1. TA31136...1..3.4.5 Filter Amp Input Level Vin (mvrms).1 1 1 1 Input Frequency Fin (KHz) 14 1 Current Consumption vs. Power Supply Voltage 4.5 Current Consumption 4 Current Consumption I CCQ 3.5 3.5 1.5 1.5 1 3 4 5 6 7 Power Supply Voltage Vcc (V) 16 Copyright 7
APPLICATION CIRCUIT.1uF.1uF 1K 1PF Copyright 8
ORDERING INFORMATION ORDER NO. PACKAGE PACKING Q TY MARK CHART A TSSOP 16L TAPE & REEL,5ea XXXX A PACKAGE DIMENSIONS TSSOP 16L Copyright 9