LTC2634CUD-LMI8TRPBF datasheet, PDF

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LTC2634CUD-LMI8TRPBF: DescriptionQuad 12-/10-/8-Bit Rail-to-Rail DACs with 10ppm/∑C Reference; File Size381KB，28 Pages; ManufacturerLinear ( ADI ); Websitehttp://www.analog.com/cn/index.html

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LTC2634CUD-LMI8TRPBF Overview

Quad 12-/10-/8-Bit Rail-to-Rail DACs with 10ppm/∑C Reference

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LTC2634

Quad 12-/10-/8-Bit

Rail-to-Rail DACs with

10ppm/°C Reference

FEATURES

DESCRIPTION

The LTC

2634 is a family of quad 12-, 10- and 8-bit volt-

age output DACs with an integrated, high accuracy, low

drift 10ppm/°C reference in 16-lead QFN and 10-lead

MSOP packages. It has rail-to-rail output buffers and is

guaranteed monotonic. The LTC2634-L has a full-scale

output of 2.5V, and operates from a single 2.7V to 5.5V

supply. The LTC2634-H has a full-scale output of 4.096V,

and operates from a 4.5V to 5.5V supply. Each DAC can

also operate with an external reference, which sets the

full-scale output to the external reference voltage.

These DACs communicate via an SPI/MICROWIRE compat-

ible 3-wire serial interface which operates at clock rates

up to 50MHz. Serial data output (SDO), a hardware clear

(CLR), and an asynchronous DAC update (LDAC) capability

are available in the QFN package. The LTC2634 incorporates

a power-on reset circuit. Options are available for reset

to zero-scale or reset to mid-scale in internal reference

mode, or reset to mid-scale in external reference mode

after power-up.

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

All other trademarks are the property of their respective owners.

Protected by U.S. Patents including 5396245, 5859606, 6891433, 6937178, 7414561.

Integrated Precision Reference

2.5V Full-Scale 10ppm/°C (LTC2634-L)

4.096V Full-Scale 10ppm/°C (LTC2634-H)

Maximum INL Error: ±2.5 LSB (LTC2634-12)

Low Noise: 0.75mV

P-P

0.1Hz to 200KHz

Guaranteed Monotonic over –40°C to 125°C

Temperature Range

Selectable Internal or External Reference

2.7V to 5.5V Supply Range (LTC2634-L)

Ultralow Crosstalk Between DACs (2.4nV•s)

Low Power: 0.6mA at 3V

Power-On Reset to Zero-Scale/Mid-Scale

Double Buffered Data Latches

Tiny 16-Lead 3mm

3mm QFN and 10-Lead

MSOP Packages

APPLICATIONS

Mobile Communications

Process Control and Industrial Automation

Automatic Test Equipment

Portable Equipment

Automotive

BLOCK DIAGRAM

GND

INTERNAL

REFERENCE

SWITCH

REF

(REFLO)

OUTA

DAC D

OUTD

REF

DAC B

DAC C

OUTC

INL (LSB)

= 3V

INTERNAL REF

REF

Integral Nonlinearity

(LTC2634-LZ12)

DAC A

REF

OUTB

CS/LD

CONTROL

LOGIC

DECODE

SDI

–1

–2

SCK

(LDAC)

( ) QFN PACKAGE ONLY

32-BIT SHIFT REGISTER

POWER-ON

RESET

(CLR)

(SDO)

2634 BD

1024

2048

CODE

3072

4095

2634 TA01

2634f

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