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參數(shù)資料
| 型號： | UPC2533GS-02 |
| 廠商： | NEC Corp. |
| 英文描述： | AM TUNER FOR ELECTRONIC TUNING CAR RADIOS |
| 中文描述： | 上午調(diào)諧器電子調(diào)諧汽車收音機(jī) |
| 文件頁數(shù)： | 1/36頁 |
| 文件大小： | 212K |
| 代理商： | UPC2533GS-02 |
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1993
DATA SHEET
BIPOLAR ANALOG INTEGRATED CIRCUIT
μ
PC2533
The
μ
PC2533 is an IC developed as an AM tuner for car stereos and car radios.
It employs an up-conversion type double super-heterodyne configuration (IF1 = 10.71 MHz, IF2 = 450 kHz).
The internal configuration consists of the MIX1 block (MIX1, OSC1, Buff1), MIX2 block (MIX2, OSC2, Buff2), IF
amplifier, detection circuit, AGC circuit, signal meter circuit, SD (station detector) circuit, and Lo/DX (short range/long
range) circuit.
Features
Possible to select stations using only one varactor diode with narrow variable capacitance range
Tracking adjustment unnecessary
Coil switching between LW (long wave) and MW (middle wave) unnecessary
Less sensitivity deviation due to tracking error
High S/N: 60 dB
Signal meter output with good linearity
Signal meter output voltage inclination setting possible by external resistor.
Can be used with IF (intermediate frequency) counter turning system or high/low tuning system.
SD Sensitivity Setting
Signal Meter Voltage
Inclination Setting
Type Number
IF Counter Output
High/Low Output
Remarks
μ
PC2533GS-01
Set by pin No. 7
Set by pin No. 9
Depends on SD
sensitivity setting
SD sensitivity of IF counter
system and high/low system
can be set independently.
μ
PC2533GS-02
Set by pin No. 7
Set by pin No. 9
Tilt of the signal meter
voltage can be set without
regard to SD sensitivity.
L
O
/DX function on-chip
Since IFT (intermediate frequency transformer) turn ratio is free from limitation for matching of ceramic filter
impedance, it is easy to design MIX gain with IFT.
AM TUNER FOR ELECTRONIC TUNING CAR RADIOS
The information in this document is subject to change without notice.
The mark
shows major revised points.
Document No. S11989EJ4V0DS00 (4th edition)
Date Published August 1998 N CP(K)
Printed in Japan
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