TA31180FN

The TA31180FN is a kind of IF detector IC. The device includes the external 2nd IF ceramic filter and external discriminator and that realized to be able to eliminate the external parts extremely. There are some features as follows: (1)no need of the external ceramic filter and discriminator; (2)low voltage operation: VCC=1.8 to 5.5 V; (3)high sensitivity: 12 dB sensitivity 20 dBV EMF (50 input); (4)built-in noise detector circuit; (5)RSSI function; (6)small package: SSOP24 pin (0.65 mm pitch).

What comes next is about the maximum ratings (Ta=25) of the TA31180FN: (1)supply voltage, VCC: 7 V; (2)power dissipation, PD: 780 mW; (3)operating temperature, Topr: -20 to +70; (4)storage temperature, Tstg: -55 to +150.

The following is about the electrical characteristics of the TA31180FN (unless otherwise specified, VCC=2.0 V, fIN=21.30 MHz, f=±1.5 kHz, fMOD=1 kHz, Ta=25): (1)power supply voltage, VCC: 1.8 V min, 2.0 V typ and 5.5 V max; (2)current consumption, ICC: 4.3 mA min, 6.7 mA typ and 9.0 mA max when no signal; (3)MIX operating frequency, fIN: 21.30 MHz; (4)MIX image rejection ratio, IRR: 20 dB min and 35 dB typ at VIN=70 dBVEMF, pin 4 GND; (5)MIX conversion gain, GVC: 26 dB min and 29.5 dB max at VIN=60 dBVEMF, pin 4 GND; (6)MIX intercept point, IP: 103 dBVEMF typ; (7)MIX input impedance, RIN: 5 k typ; (8)MIX input impedance, CIN: 3 pF typ; (9)12dB sensitivity, 12dB SN: 20 dBVEMF typ; (10)demodulation output cut-off frequency, fC: 3 kHz typ at -3 dB.