Linear Technology LTC2635-LMI12: 12-Bit Quad I²C DAC, req DC590 DC1593A-A DC1593A-A 数据表

LTC2635



2635fb

Block Diagram

Description

Quad 12-/10-/8-Bit I

2

C V

OUT

  

DACs with 10ppm/°C Reference

The  LTC

®

2635  is  a  family  of  quad  12-,  10-,  and  8-bit 

voltage-output DACs with an integrated, high-accuracy, 

low-drift reference in a 16-pin QFN or a 10-lead MSOP 

package. It has rail-to-rail output buffers and is guaran-

teed monotonic. The LTC2635-L has a full-scale output 

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

The LTC2635-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 a 2-wire I

2

C-compatible  

serial interface. The LTC2635 operates in both the standard 

mode (clock rate of 100kHz) and the fast mode (clock rate 

of 400kHz). The LTC2635 incorporates a power-on reset 

circuit. Options are available for reset to zero-scale, reset 

to mid-scale in internal reference mode, reset to mid-scale 

in external reference mode, or reset with all DAC outputs 

in a high-impedance state after power-up.

Features

applications

n

  Integrated Precision Reference

  2.5V Full-Scale 10ppm/°C (LTC2635-L)

  4.096V Full-Scale 10ppm/°C (LTC2635-H)

n

  Maximum INL Error: ±2.5 LSB (LTC2635-12)

n

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

n

  Low Noise: 0.75mV

P-P

 0.1Hz to 200kHz

n

  Guaranteed Monotonic Over –40°C to 125°C 

Automotive Temperature Range

n

  Selectable Internal or External Reference

n

  2.7V to 5.5V Supply Range (LTC2635-L)

n

  Ultralow Crosstalk Between DACs (3nV•s)

n

  Low Power: 0.6mA at 3V

n

  Double-Buffered Data Latches

n

  Small 16-Pin 3mm × 3mm QFN and 10-Lead MSOP 

Packages

n

  Mobile Communications

n

  Process Control and Industrial Automation

n

  Power Supply Margining

n

  Portable Equipment

n

  Automotive

REGISTER

REGISTER

REGISTER

REGISTER

DAC A

V

OUTA

(REFLO)

(LDAC)

CA0

(CA1)

(CA2)

( ) QFN PACKAGE ONLY

GND

V

OUTB

V

REF

DAC D

REGISTER

REGISTER

REGISTER

REGISTER

DAC B

DAC C

V

REF

V

OUTD

REF

V

CC

V

REF

V

OUTC

SWITCH

INTERNAL

REFERENCE

I

2

C INTERFACE

DECODE

I

2

C

ADDRESS

DECODE

POWER-ON

RESET

SCL

SDA

2635 BD

L

, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and 

ThinSOT is a trademark 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.

CODE

0

INL (LSB)

2

1

0

–1

–2

1024

3072

2635 TA01

4095

2048

V

CC

 = 3V

INTERNAL REF.