TA31275FN Datasheet, PDF (1/25 Pages) Toshiba Semiconductor – AM/FM RF/IF Detector IC for Low Power Wireless System

TA31275FN/ TA31275FNG
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA31275FN, TA31275FNG
AM/FM RF/IF Detector IC for Low Power Wireless System
The TA31275FN is an RF/IF detector IC for AM/FM radio.
The IC incorporates an RF amp, 2-level comparator, and local ×8
circuit
Features
• RF frequency: 240 to 450 MHz (multiplication is used)
100 to 450 MHz (multiplication is not used)
• IF frequency: 10.7 MHz
• Operating voltage range: 2.4 to 5.5 V
• Current dissipation: 5.8 mA (FM)/5.4 mA (AM)
(except current at oscillator circuit)
• Current dissipation at BS: 0 µA (typ.)
• Small package: 24-pin SSOP (0.65 mm pitch)
Block Diagram
Weight: 0.09 g (typ.)
SAW
24 23
LPF LPF
OUT IN
22 21 20 19 18
AF RSSI REF AM/FM MIX
OUT
IN
AM/FM
RSSI _Comparator
17 16 15 14 13
GND1 RF- CHARGE RF- RF-
OUT
DEC IN
×8
Detector
OSC-
IN
1
V_CC-
MIX
IF-
Lo LoBS OUT V_CC1 IF-IN DEC GND2
2
3
4
5
6
7
8
BS QUAD V_CC2 DATA
9
10 11 12
BPF
1
03-01-23