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參數(shù)資料
| 型號： | 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)： | 9/55頁 |
| 文件大?。?/td> | 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
9 of 55
Philips Semiconductors
TEF6701HL
Car radio tuner front-end for digital IF
7.4 Crystal oscillator
The crystal oscillator provides a 20.5 MHz signal that is used for:
Reference frequency for frequency synthesizer PLL
Local oscillator for AM mixer 2
Reference frequency for the IF counter
Timing signal for the RDS update algorithm.
7.5 PLL
The fast synthesizer PLL tuning system with local control is used for inaudible RDS
updating.
7.6 DAA
To reduce the number of manual alignments in production, the following I
2
C-bus controlled
Digital Auto Alignment (DAA) functions are included:
FM RF DAA
–
7-bit DAA circuitry for the conversion of the VCO tuning voltage to a controlled
alignment voltage for the FM antenna tank circuit.
FM and AM level DAA
–
Level DAA circuitry for alignment of slope (3-bit) and starting point (5-bit) of the
level curve.
7.7 FM keyed AGC
The AGC threshold is programmable and the keyed AGC function is switchable via the
I
2
C-bus. AGC detection occurs at the input of the FM mixer. If the keyed AGC function is
activated, the AGC is keyed only by the narrow-band level. The AGC PIN diode drive can
be activated via the I
2
C-bus as a local function for search tuning. The AGC sources a
constant 10 mA current into the FM PIN diode in AM mode.
7.8 FM IF amplifier
The FM IF amplifier provides 10.5 dB or 14 dB gain, selectable via the I
2
C-bus with high
linearity over a wide dynamic range. In IBOC DAB mode (activated via the I
2
C-bus) FM IF
is buffered and directly fed to FM IFAGC, bypassing the second FM ceramic filter.
7.9 FM IFAGC
This is a linear FM IFAGC amplifier with multiplexed inputs for FM standard and
FM IBOC DAB. The gain controlled FM IF is output by the multiplexed FM IF/AM IF2
buffer for a car IF DSP IC (e.g. SAA7724H).
7.10 AM tuner including mixer 1 and mixer 2
The AM tuner is realized in a double conversion technique and is capable of selecting LW,
MW and SW bands.
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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 |
| TEF6721HL/V1 | 功能描述:調(diào)諧器 DIGITAL IF TUNER IC RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: |
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| TEF6721HL/V1S,518 | 功能描述:調(diào)諧器 CAR RADIO TUNER FRNT END FOR DIGITAL IF RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: |
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