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SP7800

12-Bit 3µs Sampling A/D Converter

Signal Processing Technologies 

®

SP7800A

12-Bit 3µs Sampling A/D Converter

s 333k Samples Per Second

s Standard ±10V and ±5V Input

s No Missing Codes Over Temperature

s AC Performance Over Temperature

71.5dB Signal–to–Noise Ratio at Nyquist

85dB Spurious–free Dynamic Range at

49KHz

–81dB Total Harmonic Distortion at

49KHz

s Internal Sample/Hold, Reference,

Clock, and 3-State Outputs

s Power Dissipation: 90mW

s 24–Pin Narrow DIP and 24–Lead SOIC

s Enhanced Single (+5V) Supply Version of

ADS7800

DESCRIPTION…

The SP7800A is a complete 12-bit sampling A/D converter using state–of–the–art CMOS structures.

It contains a complete 12–bit successive approximation A/D converter with internal sample/hold,

reference, clock, digital interface for microprocessor control, and three–state output drivers. AC and

DC performance are completely specified. Two grades based on linearity and dynamic performance

are available to provide the optimum price/performance fit in a wide range of applications.

±10VIN

±5VIN

CS R/C HBE

Control

Logic

Clock

IBIP

CDAC.....

.....

Internal

Ref

.....

.....

SAR

Comparator

Output

Latches

And

Three

State

Drivers

BUSY

Three

State

Parallel

Output

Data

Bus

SP7800ADS/02

SP7800A 12-Bit 3µs Sampling A/D Converter

1

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