Linear Technology LTC2657-H16 Octal I²C 16-bit Voltage Output DAC with 2.048V Reference, req DC590 DC1529A-B DC1529A-B Datenbogen

LTC2657

1

2657f

Octal I

2

C 16-/12-Bit 

Rail-to-Rail DACs with 

10ppm/°C Max Reference

The LTC

®

2657 is a family of octal I

2

C 16-/12-Bit Rail-to-

Rail DACs with Integrated 10ppm/°C Max Reference. The 
DACs have built-in high performance, rail-to-rail, output 
buffers and are guaranteed monotonic. The LTC2657-L has 
a full-scale output of 2.5V with the integrated reference and 
operates from a single 2.7V to 5.5V supply. The LTC2657-H 
has a full-scale output of 4.096V with the integrated reference 
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 2 times the external reference voltage.

The parts use a 2-wire I

2

C  compatible serial interface. The 

LTC2657 operates in both the standard mode (maximum 
clock rate of 100kHz) and the fast mode (maximum clock 
rate of 400kHz). The LTC2657 incorporates a power-on reset 
circuit that is controlled by the PORSEL pin. If PORSEL is tied 
to GND the DACs reset to zero-scale at power-up. If PORSEL 
is tied to V

CC

, the DACs reset to mid-scale at power-up.

L, 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, 6891433 and patent pending.

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  Integrated Reference 10ppm/°C Max

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  Maximum INL Error: ±4LSB

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  Guaranteed Monotonic Over Temperature

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  Selectable Internal or External Reference

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  2.7V to 5.5V Supply Range (LTC2657-L)

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  Integrated Reference Buffers

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  Ultralow Crosstalk between DACs(0.8nV•s)

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

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 400kHz I

2

C Interface

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  Tiny 20-Lead 4mm 

× 5mm QFN and 20-Lead 

Thermally enhanced TSSOP packages

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 Mobile Communications

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  Process Control and Industrial Automation

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 Instrumentation

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  Automatic Test Equipment

n

 Automotive

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INTERNAL REFERENCE

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POWER-ON RESET

REFCOMP

REFIN/OUT

V

CC

GND

DAC A

REF

DAC H

V

OUTH

DAC G

V

OUTG

DAC F

V

OUTF

DAC E

V

OUTE

PORSEL

SDA

SCL

REFLO

V

OUTA

DAC B

V

OUTB

DAC C

V

OUTC

DAC D

V

OUTD

CA2

LDAC

CA0

CA1

2-WIRE INTERFACE

32-BIT SHIFT REGISTER

2657 BD

CODE

128

INL (LSB)

0

1

2

65535

2657 TA01

–1

–2

–4

16384

32768

49152

–3

4

3

DAC A
DAC B
DAC C
DAC D

DAC E
DAC F
DAC G
DAC H