43

s 3

µs, 5µs or 10µs Sample/Conversion

Time

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 Low Power Dissipation: 90mW

s 28–Pin Narrow PDIP and SOIC

DESCRIPTION…

The SP85XX Series are complete 12-bit sampling A/D converters using state–of–the–art

CMOS structures. They contain 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. Power dissipation is only 90mW. AC and DC performance are

completely specified. Sampling/conversion rates of 3

µs, 5µs and 10µs are offered.

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±10V

CS

R/C HBE

IBIP

IN

Internal

Ref

Control

Logic

Clock

Comparator

Three

State

Parallel

Output

Data

Bus

BUSY

CDAC

(1.2043V)

SAR

Output

Latches

And

Three

State

Drivers

SP8503, SP8505, SP8510

12-Bit Sampling A/D Converters