LTC2664

1

2664fa

For more information www.linear.com/LTC2664

Block Diagram

Features

Description

Quad 16-Bit/12-Bit ±10V

10ppm/°C Max Reference

The LTC®2664 is a family of four-channel, 16-/12-bit ±10V

digital-to-analog converters with integrated precision

references. They are guaranteed monotonic and have

built-in rail-to-rail output buffers. These SoftSpan™ DACs

offer five output ranges up to ±10V. The range of each

channel is independently programmable, or the part can

be hardware-configured for operation in a fixed range.

Theintegrated2.5Vreferenceisbufferedseparatelytoeach

channel; an external reference can be used for additional

range options. The LTC2664 also includes A/B toggle

capabilityviaadedicatedpinorsoftwaretogglecommand.

The SPI/Microwire-compatible 3-wire serial interface

operates on logic levels as low as 1.71V at clock rates

up to 50MHz.

Integral Nonlinearity (LTC2664-16)

applications

n

Precision Reference 10ppm/°C Max

n

Independently Programmable Output Ranges:

0V to 5V, 0V to 10V, ±2.5V, ±5V, ±10V

n

Full 16-Bit/12-Bit Resolution at All Ranges

n

Maximum INL Error: ±4LSB at 16 Bits

n

A/B Toggle via Software or Dedicated Pin

n

Analog Multiplexer with Auxiliary Inputs

n

Guaranteed Monotonic Over Temperature

n

Internal or External Reference

n

Outputs Drive ±10mA Guaranteed

n

1.8V to 5V SPI Serial interface

n

32-Lead (5mm × 5mm) QFN Package

n

Optical Networking

n

Instrumentation

n

Data Acquisition

n

Automatic Test Equipment

n

Process Control and Industrial Automation

L

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

SoftSpan is a trademark of Linear Technology Corporation. All other trademarks are the property

of their respective owners. Protected by U.S. Patents, including 6891433, 5859606, 5936245,

7671770.

INTERNAL REFERENCE

CONTROL LOGIC

DECODE

TOGGLE SELECT REGISTER

MONITOR MUX

POWER-ON RESET

REFCOMP

OVRTMP

2664 BD

GND

11, 29

REFLO

10, 27

MUX

DAC 0

MUX

DAC 3

MUX

DAC 1

MUX

DAC 2

26

30

MUXIN0

MUXIN1

3

2

5

CS/LD

SCK

SDI

SDO

13

14

16

15

REF

25

28

CLR

24

7

8

MUXIN3

22

23

MUXIN2

LDAC

20

21

12

TGP

MSP0

MSP1

MSP2

17

31

32

1

18

32-BIT SHIFT REGISTER

CODE

0

16384

32768

49152

65535

–4

–3

–2

–1

0

1

2

3

4

2664 TA01b

±10V RANGE