TA31275FNG - Toshiba Semiconductor

TA31275FNG AM/FM RF/IF Detector IC for Low Power Wireless System

(the values of resistor and capacitor in the internal equivalent circuit are typical.) Pin No. Pin Name Function Internal Equivalent Circuit 15 kΩ 1 OSC IN Local oscillator input pin. 1 2 pF 5 kΩ 2 VCC-Lo Local’ power supply pin  3 LOBS Lo switch pin. H: ×8 circuit pin. L: Through pass 3 70 kΩ Mixer output pin. 4 MIX OUT The output impedance.

Features

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• 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) Weight: 0.09 g (typ.) Block Diagram SAW 22 20 19 18 17 16 15 14 13 21 24 23 LPF LPF AF RSSI REF AM/FM MIX GND1 RF- CHARGE RFRFOUT IN OUT IN OUT DEC IN AM/FM RSSI Comparator ×8 OSCIN 1 VCCLo LoBS 2 3 MIX OUT 4 IFDEC GND2 7 8 Detector VCC1 5 IF-IN 6 BS QUAD.