Datasheet > TDA8757AHL/21

TDA8757AHL/21

更新时间： 2024-09-19 06:43:55

品牌	Logo	应用领域
恩智浦 - NXP		转换器
页数	文件大小	规格书
37页	908K
描述
IC 3-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP144, PLASTIC, HLQFP-144, Analog to Digital Converter

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TDA8757AHL/21 数据手册

TDA8757A

Triple 8-bit ADC 205 Msps

Rev. 01 — 22 March 2002

Preliminary data

1. General description

The TDA8757A is a triple 8-bit ADC for the digitizing of large bandwidth RGB/YUV

signals at a sampling rate up to 205 Msps.

The IC supports display resolutions up to 1600 × 1200 (UXGA) at 75 Hz.

The IC also includes a PLL that can be locked to the horizontal line frequency and

generates the ADC clock. The PLL jitter is minimized for high resolution PC graphics

applications. An external clock signal can also be used to clock the ADC.

The outputs are available either on one port up to 110 Msps or on two ports up to

205 Msps. The operating mode is selectable with the serial interface for either

I²C-bus or 3-wire serial bus (3W-bus) operation.

The clamp level, the gain and the other settings are controllable through the serial

interface.

2. Features

■ Triple 8-bit ADC

■ Sampling rate up to 205 Msps

■ IC controllable by a serial interface which can be I²C-bus or 3W-bus, selected by a

TTL input pin

■ Three clamps for programming a clamping code from −63.5 to +64 in steps of

¹⁄₂LSB (RGB) and from +120 to +136 in steps of ¹⁄₂LSB (YUV)

■ Three controllable ampliﬁers: gain controlled through the serial interface to

produce a full-scale resolution of ¹⁄₂LSB peak-to-peak

■ Ampliﬁer bandwidth of 250 MHz

■ Low gain variation with temperature

■ PLL controllable with the serial interface to generate the ADC clock which can be

locked to any line frequency of 15 to 150 kHz

■ Integrated PLL divider

■ Programmable phase clock adjustment cells

■ Internal voltage regulators

■ TTL compatible digital inputs and outputs

■ Outputs on one port or demultiplexed on two ports; selectable with the serial

interface

■ Chip enable high-impedance ADC output

■ Power-down mode

■ 1.7 W power dissipation

■ Sync on green extractor.

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