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LTC1274

12-Bit, 10mW, 100ksps ADCs with 1µA Shutdown

Linear Technology 

LTC1274/LTC1277

APPLICATI S I FOR ATIO

In the Sleep mode, the comparator of the ADC will start

consuming power after the rising edge of SLEEP as shown

SLEEP

3ms

(CREF = 4.7µF)

in Figure 18a. If REFRDY is tied to NAP, the comparator will

be powered up after REFRDY’s rising edge. Hence more

power will be saved as in Figure 18b.

3ms

(CREF = 4.7µF)

SLEEP

REFRDY

NAP = REFRDY

COMPARATOR

STATUS ON

OFF

ON

LTC1274/77 • F18a

Figure 18a. Power Saved in Sleep Mode (NAP = HIGH)

COMPARATOR

STATUS

ON

OFF

ON

LTC1274/77 • F18b

Figure 18b. Power Saved in Sleep Mode (NAP = REFRDY)

PACKAGE DESCRIPTIO Dimensions in inches (millimeters) unless otherwise noted.

SW Package

24-Lead Plastic Small Outline (Wide 0.300)

(LTC DWG # 05-08-1620)

0.291 – 0.299**

(7.391 – 7.595)

0.010

(0.254

–

–

0.029

0.737)

×

45°

0.093 – 0.104

(2.362 – 2.642)

0° – 8° TYP

0.037 – 0.045

(0.940 – 1.143)

0.598 – 0.614*

(15.190 – 15.600)

24 23 22 21 20 19 18 17 16 15 14 13

0.050

0.009 – 0.013

(0.229 – 0.330)

NOTE 1

0.016 – 0.050

(0.406 – 1.270)

(1.270)

TYP

0.014 – 0.019

(0.356 – 0.482)

NOTE:

1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS

THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS.

*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE

**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE

NOTE 1

0.004 – 0.012

(0.102 – 0.305)

0.394 – 0.419

(10.007 – 10.643)

1 2 3 4 5 6 7 8 9 10 11 12

RELATED PARTS

PART NUMBER

LTC1272

LTC1273/75/76

LTC1278

LTC1279

LTC1282

LTC1409

LTC1410

DESCRIPTION

12-Bit, 3µs, 250kHz Sampling A/D Converter

12-Bit, 300ksps Sampling A/D Converters with Reference

12-Bit, 500ksps Sampling A/D Converter with Shutdown

12-Bit, 600ksps Sampling A/D Converter with Shutdown

12-Bit, 140ksps Sampling A/D Converter with Reference

12-Bit, 800ksps Sampling A/D Converter with Shutdown

12-Bit, 1.25Msps Sampling A/D Converter with Shutdown

COMMENTS

Single 5V, Sampling 7572 Upgrade

Complete with Clock, Reference

70dB SINAD at Nyquist, Low Power

70dB SINAD at Nyquist, Low Power

3V or ±3V ADC with Reference, Clock

Fast, Complete Low Power ADC, 80mV

Fast, Complete Wideband ADC, 160mV

20 Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● TELEX: 499-3977

LT/GP 1195 10K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1995

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