TDA8752A Datasheet, PDF (2/36 Pages) NXP Semiconductors – Triple high-speed Analog-to-Digital Converter ADC

Philips Semiconductors
Triple high-speed Analog-to-Digital
Converter (ADC)
Product specification
TDA8752A
FEATURES
• Triple 8-bit ADC
• Sampling rate up to 100 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 full-scale ADC input of 1 V (p-p)
• 3 clamps for programming a clamping code between
−63.5 and +64 in steps of ¹â„₂LSB
• 3 controllable amplifiers: gain controlled via the serial
interface to produce a full scale resolution of ¹â„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 from
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 W power dissipation.
GENERAL DESCRIPTION
The TDA8752A 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 on 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 TDA8752A serial bus address
between four fixed values, in the event that several
TDA8752A 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
TDA8752AH/6
TDA8752AH/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)
60
100
1999 Feb 24
2