LTC1598 LINER [Linear Technology], LTC1598 Datasheet

LTC1598

Manufacturer Part Number

LTC1598

Description

4- and 8-Channel, Micropower Sampling 12-Bit Serial I/O A/D Converters

Manufacturer

LINER [Linear Technology]

Datasheet

1.LTC1598.pdf (24 pages)

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Current page: 1 of 24
Download datasheet (241Kb)

FEATURES

APPLICATIO S

TYPICAL APPLICATIO

■

0V TO 5V

ANALOG

INPUTS

RANGE

Pen Screen Digitizing

Battery-Operated Systems

Remote Data Acquisition

Isolated Data Acquisition

Battery Monitoring

Temperature Measurement

12-Bit Resolution

Auto Shutdown to 1nA

Low Supply Current: 320μA Typ

Guaranteed ±3/4LSB Max DNL

Single Supply 5V Operation

(3V Versions Available: LTC1594L/LTC1598L)

Multiplexer: 4-Channel MUX (LTC1594)

Separate MUX Output and ADC Input Pins

MUX and ADC May Be Controlled Separately

Sampling Rate: 16.8ksps

I/O Compatible with QSPI, SPI and MICROWIRE

Small Package: 16-Pin Narrow SO (LTC1594)

24μW, 4-Channel, 12-Bit ADC Samples at 200Hz and Runs Off a 5V Supply

8 COM

CH0

CH1

CH2

CH3

CH4

CH5

CH6

CH7

ADC FILTER

OPTIONAL

8-Channel MUX (LTC1598)

8-CHANNEL

24-Pin SSOP (LTC1598)

MUX

1μF

MUXOUT

ADCIN

SAMPLING

–

12-BIT

GND

ADC

4, 9

REF

15, 19

CSMUX

CSADC

1594/98 TA01

CLK

OUT

5, 14

12-Bit Serial I/O A/D Converters

, etc.

1μF

SERIAL DATA LINK

SPI COMPATABLE

MICROWIRE AND

DESCRIPTIO

The LTC

A/D converters that feature 4- and 8-channel multiplexers,

respectively. They typically draw only 320μA of supply

current when converting and automatically power down to

a typical supply current of 1nA between conversions. The

LTC1594 is available in a 16-pin SO package and the

LTC1598 is packaged in a 24-pin SSOP. Both operate on

a 5V supply. The 12-bit, switched-capacitor, successive

approximation ADCs include a sample-and-hold.

On-chip serial ports allow efficient data transfer to a wide

range of microprocessors and microcontrollers over three

or four wires. This, coupled with micropower consump-

tion, makes remote location possible and facilitates trans-

mitting data through isolation barriers.

The circuit can be used in ratiometric applications or with

an external reference. The high impedance analog inputs

and the ability to operate with reduced spans (to 1.5V full

scale) allow direct connection to sensors and transducers

in many applications, eliminating the need for gain stages.

MPU

All other trademarks are the property of their respective owners.

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

1594/LTC1598 are micropower, 12-bit sampling

Micropower Sampling

4- and 8-Channel,

1000

100

0.1

Supply Current vs Sample Rate

CLK

REF

LTC1594/LTC1598

= 25°C

= 5V

= 320kHz

= 5V

SAMPLE FREQUENCY (kHz)

1594/98 TA02

100

15948fb

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