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TDA8752B

Triple high-speed Analog-to-Digital Converter 110 Msps (ADC)

Philips Electronics 

Philips Semiconductors

Triple high-speed Analog-to-Digital

Converter 110 Msps (ADC)

Preliminary specification

TDA8752B

FEATURES

• Triple 8-bit ADC

• Sampling rate up to 110 MHz

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

I2C-bus or 3-wire, 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)

• 3 clamps for programming a clamping code between

−63.5 and +64 in steps of 1⁄2LSB

• 3 controllable amplifiers: gain controlled via 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 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

• Power-down mode

• Possibility to use up to four ICs in the same system,

using the I2C-bus interface, or more, using the 3-wire

serial interface

• 1.1 W power dissipation.

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 of the other settings are

controlled via a serial interface (either I2C-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

between four fixed values, in the event that several

TDA8752B ICs are used in a system, using the I2C-bus

interface (for example, two ICs used in an odd/even

configuration).

APPLICATIONS

• R, G and B high-speed digitizing

• LCD panels drive

• LCD projection systems

• VGA and higher resolutions

• Using two ICs in parallel, higher display resolution can

be obtained; 200 MHz pixel frequency.

ORDERING INFORMATION

TYPE NUMBER

NAME

PACKAGE

DESCRIPTION

TDA8752BH/8 QFP100 plastic quad flat package; 100 leads (lead length

1.95 mm); body 14 × 20 × 2.8 mm

VERSION

SOT317-2

SAMPLING

FREQUENCY

(MHz)

110

2000 Jan 10

2

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