AN7280S
AN7280S is FM Front-end manufactured by Panasonic.
Overview
The AN7280S is an FM front-end IC designed for DTS except RF amp. of car radio. It features built-in local oscillation frequency buffer output, PIN diode driver for antenna damping and SSC (search stop control).
Unit : mm 0.4 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 1.5±0.2
0.4±0.25 s Features
- High sensitivity, high S/N ratio
- Good IM characteristics at strong input
- Available for two loop AGC (keyed AGC)
- Pre IF amp. gain variable
- PIN diode driver (ADX) built-in
0.1±0.1
5.4±0.3 7.7±0.3
20-Lead SOP Package (SOP020-P-0300B) s Block Diagram
GND 20 19 18 17 16 15 14 13 12 11
IF Amp. Mixer
VREG Buffer AGC Amp.
Buffer
SSC Det.
8 GND
10 VCC
0.15 0.65
12.6±0.3
AN7280S s Absolute Maximum Ratings (Ta=25˚C)
Parameter Supply Voltage Supply Current Power Dissipation Operating Ambient Temperature Storage Temperature Symbol VCC ICC PD Topr Tstg Rating 9.2 50 460
- 40 ~ + 85
- 55 ~ + 150
ICs for FM/AM Tuner
Unit V m A m W ˚C ˚C s Remended Operating Range (Ta=25˚C)
Parameter Operating Supply Voltage Range Symbol VCC Range 6.8V ~ 9.2V s Electrical Characteristics (Ta=25˚C)
Parameter S/N Ratio Local Oscillation Level IF Output Level AGC Level (L) AGC Level (H) Symbol NOUT VOSC VOUT VAGC (L) VAGC (H) Condition VCC= 8V, Vin=17d BµNo modulation However, S= output at 400Hz, 30%modulation VCC= 8V, f OSC= 108.7MHz Measured by Pin4, No signal input VCC= 8V, Vin= 51d Bµ VCC= 8V, Vin= 67d Bµ VCC= 8V, Vin= 53d Bµ 6 min. 22 219 41 typ. 30 384 58 0.05 6.5 435 82 0.5 max. Unit d B m V m V V V s Characteristics Curve
Level
- Diagram
50 43.5 (max.) 40 Level (d B) 0 30 20 13.5 AFOUT (d B) 10 0 8.5
- 40 24.5 16.0 (min.)
- 20 Vin (d BµV) VCC=8V fin=98MHz Mod.=22.5k Hz fm=1k Hz IF : AN7256 400Hz HPF ON 20 15 10 5 0
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