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SPT7862 Datasheet, PDF (1/10 Pages) List of Unclassifed Manufacturers – 10-BIT, 40 MSPS, DUAL-CHANNEL A/D CONVERTER | |||
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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
â40 °C to +85 °C.
BLOCK DIAGRAM
AVDD AGND DVDD DGND
VINA
VINRA
VRHFA
VRHSA
VRLFA
VRLSA
CLK A
VINB
VINRB
VRHFB
VRHSB
VRLFB
VRLSB
CLK B
ADC
Reference
Ladder
Timing
Generation
ADC
Reference
Ladder
Timing
Generation
Output
Buffers
Output
Buffers
OVDDA (+3.3/5.0 V)
DA9â0
OGNDA
DAVA
EN
OVDDB (+3.3/5.0 V)
DB9â0
OGNDB
DAVB
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