TA31275FN TOSHIBA [Toshiba Semiconductor], TA31275FN Datasheet - Page 7

• Manufacturer Part Number: TA31275FN
• Description: AM/FM RF/IF Detector IC for Low Power Wireless System
• Manufacturer: TOSHIBA [Toshiba Semiconductor]

7. RF Amp Gain 2
8. IF Amp Gain
9. Waveform-Shaping Output Duty Cycle
10. Local Frequency Range (after multiplying frequency by 8)
11. Treatment of FM Terminal when Using AM
external circuit. To use the bit rate filter, connect the RSSI pin (pin 21) to the bit rate filter through a
resistor. The AF-OUT pin (pin 22) should be left open.
connect it to the BS pin (pin 9).
G
RF amp gain 2 (G
The intended value is 75dB.
The specified range of electrical characteristics is only available for single-tone.
When the multiplier circuit is used, the local frequency will be in the range 250.7 MHz to 439.3 MHz.
When using AM, it is not necessary to treat the QUAD pin (pin 10). Leave it open or connected to an FM
Using AM causes current to flow through the AM/FM pin (pin 19). Ground the AM/FM pin (pin 19) or
v (RF) 2
G
v (RF) 2
is calculated as follows:
= G
RF
v (RF) 2
G
18
Bit rate filter for FM
4
RF
1000 pF
− G
Figure 5
22
0.01 µF
v (MIX)
AF
OUT
) is a reference value calculated as follows. Measure G
21
RSSI
0.01 µF
16
6
Figure 4
7
13
1000 pF
6 pF
Bit rate filter for AM
Figure 6
TA31275FN/ TA31275FNG
22
AF
OUT
36 kΩ
SG
50dBµV
21
RSSI
RF
in the following figure.
03-01-23