20

LTC1274/LTC1277

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

© LINEAR TECHNOLOGY CORPORATION 1995

LT/GP 1195 10K • PRINTED IN USA

S

APPLICATI

I FOR ATIO

PACKAGE DESCRIPTIO

Dimensions in inches (millimeters) unless otherwise noted.

RELATED PARTS

PART NUMBER

DESCRIPTION

COMMENTS

LTC1272

12-Bit, 3

µs, 250kHz Sampling A/D Converter

Single 5V, Sampling 7572 Upgrade

LTC1273/75/76

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

Complete with Clock, Reference

LTC1278

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

70dB SINAD at Nyquist, Low Power

LTC1279

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

70dB SINAD at Nyquist, Low Power

LTC1282

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

3V or

±3V ADC with Reference, Clock

LTC1409

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

Fast, Complete Low Power ADC, 80mV

LTC1410

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

Fast, Complete Wideband ADC, 160mV

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

consuming power after the rising edge of SLEEP as shown

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.

REFRDY

COMPARATOR

STATUS

ON

OFF

ON

LTC1274/77 • F18a

SLEEP

3ms

NAP = REFRDY

COMPARATOR

STATUS

ON

OFF

ON

LTC1274/77 • F18b

SLEEP

3ms

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

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

SW Package

24-Lead Plastic Small Outline (Wide 0.300)

(LTC DWG # 05-08-1620)

NOTE 1

0.598 – 0.614*

(15.190 – 15.600)

22

21

20

19

18

17

16

15

1

23

4

5

6

78

0.394 – 0.419

(10.007 – 10.643)

910

13

14

11

12

23

24

0.037 – 0.045

(0.940 – 1.143)

0.004 – 0.012

(0.102 – 0.305)

0.093 – 0.104

(2.362 – 2.642)

0.050

(1.270)

TYP

0.014 – 0.019

(0.356 – 0.482)

0

° – 8° TYP

NOTE 1

0.009 – 0.013

(0.229 – 0.330)

0.016 – 0.050

(0.406 – 1.270)

0.291 – 0.299**

(7.391 – 7.595)

× 45°

0.010 – 0.029

(0.254 – 0.737)

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

*

**