1

LTC1606

16-Bit, 250ksps,

Single Supply ADC

March 2000

FEATURES

The LTC

verter that draws only 75mW (typical) from a single 5V

supply. This easy-to-use device includes sample-and-

hold, precision reference, switched capacitor successive

approximation A/D and trimmed internal clock.

The LTC1606’s input range is an industry standard

±10V.

Maximum DC specs include

±2.0LSB INL and 16 bits no

missing codes over temperature. An external reference

can be used if greater accuracy over temperature is

needed.

The 90dB signal-to-noise ratio offers an improvement of

3dB over competing devices, and the RMS transition noise

is reduced (0.65LSB vs 1LSB) relative to competitive

parts.

The ADC has a microprocessor compatible, 16-bit or two

byte parallel output port. A convert start input and a data

ready signal (BUSY) ease connections to FIFOs, DSPs and

microprocessors.

s

Sample Rate: 250ksps

s

Single 5V Supply

s

Bipolar Input Range:

s

Signal-to-Noise Ratio: 90dB Typ

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Power Dissipation: 75mW Typ

s

Integral Nonlinearity:

±2.0LSB Max

s

Guaranteed No Missing Codes

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Operates with Internal or External Reference

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Internal Synchronized Clock

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28-Pin SSOP Package

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Improved 2nd Source to AD976A and ADS7805

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Industrial Process Control

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Multiplexed Data Acquisition Systems

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High Speed Data Acquisition for PCs

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Digital Signal Processing

Low Power, 250kHz, 16-Bit Sampling ADC on 5V Supply

, LTC and LT are registered trademarks of Linear Technology Corporation.

4k

7.35k

200

Ω

REFERENCE

2.5k

9k

16-BIT

SAMPLING ADC

D15 TO D0

33.2k

10

µF

10

µF

0.1

µF

2.2

µF

±10V

INPUT

CAP

REF

AGND1

1

4

3

2

AGND2

5

DGND

14

CONTROL

LOGIC AND

TIMING

BUSY

BYTE

CS

R/C

28

27

6 TO 13

15 TO 22

26

25

24

23

DIGITAL

CONTROL

SIGNALS

1606 TA01

16-BIT

OR 2 BYTE

PARALLEL

BUS

5V

1.64x

BUFFER

4.096V

2.5V

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.

Final Electrical Specifications