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LTC1605-1/LTC1605-2

Single Supply 16-Bit, 100ksps,

Sampling ADCs

The LTC

16-bit A/D converters that draw only 55mW (typical) from

a single 5V supply. These easy-to-use devices include a

sample-and-hold, precision reference, switched capacitor

successive approximation A/D and trimmed internal clock.

The LTC1605-1’s input range is 0V to 4V while the

LTC1605-2’s input range is

±4V. An external reference

can be used if greater accuracy over temperature is

needed.

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.

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Sample Rate: 100ksps

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Complete 16-Bit Solution on a Single 5V Supply

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Unipolar Input Range: 0V to 4V (LTC1605-1)

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Bipolar Input Range:

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Power Dissipation: 55mW Typ

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Signal-to-Noise Ratio: 86dB Typ

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Operates with Internal or External Reference

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Internal Synchronized Clock

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28-Pin 0.3" PDIP and SSOP Packages

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

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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

LTC1605-1 Low Power, 100kHz, 16-Bit Sampling ADC on 5V Supply

4k

4k

200

Ω

2.5V

REFERENCE

20k

10k

16-BIT

SAMPLING ADC

D15 TO D0

33.2k

2.2

µF

2.5V

2.5V

10

µF

0.1

µF

2.2

µF

0V TO 4V

INPUT

CAP

REF

AGND1

1

4

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

1605-1/2 TA01

16-BIT

OR 2 BYTE

PARALLEL

BUS

5V

BUFFER

3

CODE

0

65535

1605-1/2 TA02/G04

16384

32768

49152

2.0

1.5

1.0

0.5

0

–0.5

–1.0

–1.5

–2.0

Typical INL Curve

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO