Detector IC. TA31273FN Datasheet

TA31273FN IC. Datasheet pdf. Equivalent

Part TA31273FN
Description AM RF/IF Detector IC
Feature ( DataSheet : www.DataSheet4U.com ) TA31273FN TOSHIBA Bipolar Linear Integrated Circuit Silicon Mon.
Manufacture Toshiba Semiconductor
Datasheet
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TA31273FN
( DataSheet : www.DataSheet4U.com )
TA31273FN
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA31273FN
AM RF/IF Detector IC
The TA31273FN is an RF/IF detector IC for AM radio.
The IC incorporates an RF amp, 2-level comparator, and local x8
circuit.
Features
RF frequency: 240 to 450 MHz
IF frequency: 10.7 MHz
Operating voltage range: 3.0 to 5.5 V
Current dissipation: 6.8 mA (typ.)
(Not operating local oscillator)
Current dissipation at BS: 0 µA (typ.)
Small package: 20-pin SSOP (0.65-mm pitch)
Block Diagram
Weight: 0.09 g (typ.)
SAW
20 19 18 17
FIL FIL RSSI BS
OUT IN
RSSI
16 15 14 13 12 11
MIX GND1 RF MONI RF RF
IN
OUT
DEC IN
Comparator
×8
OSC
IN VCC1 LOBS
123
MIX IF IF
OUT VCC2 IN DEC REF GND2 DATA
4 5 6 7 8 9 10
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2002-07-08



TA31273FN
TA31273FN
Pin Function (The Values Of Resistor And Capacitor In The Internal Equivalent Circuit
Are Typical.)
Pin
No.
Pin Name
Function
Internal Equivalent Circuit
1 OSC IN
Local oscillator input pin.
2 VCC1
Power supply pin 1.
3 LOBS
Lo switch pin.
H: x8 circuit in operation
Lo: Through pass
1
2 pF
60 k
3
4 MIX OUT Mixer output pin.
5 VCC2
Power supply pin 2.
6 IF IN
IF amp input pin.
7 IF DEC
IF amp input pin.
Used as a bias coupling pin.
8 REF
AM comparator REF pin.
9 GND2
GND pin 2.
10 DATA
AM waveform shaping output pin.
Open collector output.
Connect a pull-up resistor.
210
4
3 k
6
7
500
20
19
5.5 k
8
40 kCOMP
40 k
DATA
10
2 k
2 2002-07-08





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