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參數(shù)資料
| 型號(hào)： | TEF6701HL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 接收器 |
| 英文描述： | Car radio tuner front-end for digital IF |
| 中文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| 封裝： | 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64 |
| 文件頁數(shù)： | 8/55頁 |
| 文件大小： | 318K |
| 代理商： | TEF6701HL |
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9397 750 13471
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 01 — 16 November 2004
8 of 55
Philips Semiconductors
TEF6701HL
Car radio tuner front-end for digital IF
7.
Functional description
7.1 FM I/Q mixer
The FM quadrature mixer converts FM RF (64 MHz to 162.55 MHz) to an IF of 10.7 MHz.
The FM mixer provides inherent image rejection and high RF sensitivity. The image
rejection can be switched from low injection Local Oscillator (LO) to high injection LO via
the I
2
C-bus. The mixer gain can be increased by 6 dB via the I
2
C-bus. In this case the
threshold of the FM keyed AGC has to be lowered by 6 dB to prevent the mixer from being
overloaded.
The mixer is capable of tuning the:
US FM and US IBOC DAB from 87.9 MHz to 107.9 MHz
US weather FM from 162.4 MHz to 162.55 MHz
Europe FM from 87.5 MHz to 108 MHz
Japan FM from 76 MHz to 91 MHz
East Europe FM from 64 MHz to 74 MHz.
7.2 Buffer output for weather band flag
The buffer output (pin WBFLAG) is HIGH for weather band mode.
7.3 VCO
The varactor tuned LC oscillator provides the local oscillator signal for both FM and AM
mixer 1. It has a frequency range from 159.9 MHz to 248.2 MHz.
ADDRSEL
BUSENABLE
SDA
SCL
AMNBHOLD
AFHOLD
VLEVEL
SWPORT2
XTAL1
XTAL2
XTALGND
IREF
IFOUT
TAMIF2AGC
TFMIFAGC
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
hardware address select for I
2
C-bus
enable input for I
2
C-bus
I
2
C-bus data line input and output
I
2
C-bus clock line input
AM noise blanker threshold
AF hold flag output for a car IF DSP IC (e.g. SAA7724H)
level voltage output for AM and FM
software programmable port 2
crystal oscillator 1
crystal oscillator 2
crystal oscillator ground
reference current for power supply
multiplexer output for FM IFAGC and AM IF2 AGC
time constant for AM IF2 AGC
time constant for FM IFAGC
Table 3:
Symbol
Pin description
…continued
Pin
Description
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| TEF6721HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Car radio tuner front-end for digital IF |
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