器件名称: CXA1538N
功能描述: FM STEREO/AM RADIO
文件大小: 299.3KB 共15页
简 介:CXA1538M/N/S
FM Stereo/AM Radio
Description The CXA1538M/N/S is high performance one-chip bipolar ICs designed for FM stereo/AM radios. These include an FM/AM front end, FM/AM IF amplifier, FM/AM detection output and FM stereo demodulator output. Features Low current consumption (In FM mode ID=11.0 mA, in AM mode 8.5 mA, VCC=6.0 V) Built-in LED drive circuit for tuning Built-in LED drive circuit for stereo indicator Built-in muting circuit for the FM band Few external parts Absolute Maximum Ratings (Ta=25 °C) Supply voltage VCC 14 V Operating temperature Topr –10 to +60 °C Storage temperature Tstg –55 to +150 °C Junction temperature Tjmax 125 °C Allowable power dissipation PD CXA1538M 500 mW CXA1538N 410 mW CXA1538S 1050 mW CXA1538M 30 pin SOP (Plastic) CXA1538S 30 pin SDIP (Plastic)
CXA1538N 30 pin SSOP (Plastic)
Recommended Operating Conditions Supply voltage VCC 2 to 9 Structure Bipolar silicon monolithic IC
V
Block Diagram
GND 30 PLL LPF 2 29 MPX REG 28 VCO 27 FM DISCRI MUTE 26 25 AM OSC 24 AFC 23 FM OSC 22 REG 21 FM RF 20 AM RF FM RF IN IN 19 18 FM/AM FE GND FE OUT 17 16
VCO
MULTIPLEX REGULATOR REGULATOR
FM FE
AM FE PD 1 MUTING 1/2 COUNTER PD 2 AUTO BLEND
BU AMP BU AMP DC AMP
FM IF/ DISCRI
AM IF/DET
DECODE AMP M/ST SW
ST IND
RIPPLE FILTER
DC AMP
DETUNE MUTING CONTROL
TUNING IND
1 PLL LPF1
2 PILOT DET LPF2
3 PILOT DET LPF2
4 ST IND VCO CHECK
5 Rch OUT
6 Lch OUT
7 VCC
8
9
10 AGC AFC 2
11 GND
12 TUNE IND
13 FM IF IN
14
15
RIPPLE AGC……
