SPT7862

10-BIT, 40 MSPS, DUAL-CHANNEL A/D CONVERTER

FEATURES

• Dual-channel, 10-Bit, 40 MSPS analog-to-digital

converter

• Low power dissipation: 320 mW (typical)

• Internal track-and-hold

• Single +5 volt supply

• Tri-state, TTL/CMOS-compatible outputs

• Selectable +3 or +5 V logic I/O

• High ESD protection of 3,500 volts minimum

APPLICATIONS

• Video set-top boxes

• Cellular base stations

• QPSK/QAM RF demodulation

• S-video digitizers

• Composite video digitizers

• Portable and handheld instrumentation

• Medical ultrasound

• Cable modems

• Video frame grabbers

GENERAL DESCRIPTION

The SPT7862 contains two separate 10-bit CMOS analog-

to-digital converters that have sampling rates of up to 40

MSPS. Each device has its own separate clock and refer-

ence inputs so that they can be used independently in

multichannel applications or can be driven from the same

inputs for demanding quadrature demodulation and S-video

applications. On-chip track-and-hold and advanced propri-

etary circuit design in a CMOS process technology provide

very good dynamic performance.

The SPT7862 operates from a single +5 V supply. Digital

data outputs are user selectable at +3 or +5 V. Output data

format is straight binary.

The SPT7862 is available in a 64-lead TQFP package

(10 x 10 mm) over the industrial temperature range of

–40

°C to +85 °C.

ADC

Reference

Ladder

Timing

Generation

CLK A

ADC

Reference

Ladder

Timing

Generation

CLK B

Output

Buffers

DA9–0

EN

Output

Buffers

DB9–0

AGND

DGND

BLOCK DIAGRAM