NXP Semiconductors Triple high-speed Analog-to-Digital Converter 110 Msps TDA8752B User Manual

Tda8752b, General description, Features

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TDA8752B

Triple high-speed Analog-to-Digital Converter 110 Msps

Rev. 03 — 21 July 2000

Product specification

c

c

1.

General description

The TDA8752B is a triple 8-bit ADC with controllable amplifiers and clamps for the
digitizing of large bandwidth RGB signals.

The clamp level, the gain and all other settings are controlled via a serial interface
(either I

2

C-bus or 3-wire serial bus, selected via a logic input).

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 can also be input to the ADC.

It is possible to set the TDA8752B serial bus address to four different values, when
several TDA8752B ICs are used in a system, by means of the I

2

C-bus interface (for

example, two ICs used in an odd/even configuration).

2.

Features

Triple 8-bit ADC

Sampling rate up to 110 Msps

IC controllable via a serial interface, which can be either I

2

C-bus or 3-wire serial

bus, selected via a TTL input pin

IC analog voltage input from 0.4 to 1.2 V (p-p) to produce a full-scale ADC input of
1 V (p-p)

Three clamps for programming a clamping code between

63.5 and +64 in steps

of

1

2

LSB for RGB signals, and from +120 to +136 in steps of

1

2

LSB for YUV

signals

Three controllable amplifiers: gain controlled via the serial interface to produce a
full-scale resolution of

1

2

LSB peak-to-peak

Amplifier bandwidth of 250 MHz

Low gain variation with temperature

PLL controllable via the serial interface to generate the ADC clock which can be
locked to a line frequency of 15 to 280 kHz

Integrated PLL divider

Programmable phase clock adjustment cells

Internal voltage regulators

TTL compatible digital inputs and outputs

Chip enable high-impedance ADC output

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