LTC2627 查看數據表（PDF） - Linear Technology

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LTC2627

16-/14-/12-Bit Dual Rail-to-Rail DACs with I2C Interface

Linear Technology 

FEATURES

■ Smallest Pin-Compatible Dual DACs:

LTC2607: 16 Bits

LTC2617: 14 Bits

LTC2627: 12 Bits

■ Guaranteed Monotonic Over Temperature

■ 27 Selectable Addresses

■ 400kHz I2CTM Interface

■ Wide 2.7V to 5.5V Supply Range

■ Low Power Operation: 260µA per DAC at 3V

■ Power Down to 1µA, Max

■ High Rail-to-Rail Output Drive (±15mA, Min)

■ Ultralow Crosstalk (30µV)

■ Double-Buffered Data Latches

■ Asynchronous DAC Update Pin

■ LTC2607/LTC2617/LTC2627: Power-On Reset to

Zero Scale

■ LTC2607-1/LTC2617-1/LTC2627-1: Power-On Reset

to Midscale

■ Tiny (3mm × 4mm) 12-Lead DFN Package

U

APPLICATIO S

■ Mobile Communications

■ Process Control and Industrial Automation

■ Instrumentation

■ Automatic Test Equipment

LTC2607/LTC2617/LTC2627

16-/14-/12-Bit Dual Rail-to-Rail

DACs with I2C Interface

DESCRIPTIO

The LTC®2607/LTC2617/LTC2627 are dual 16-, 14- and

12-bit, 2.7V to 5.5V rail-to-rail voltage output DACs in a

12-lead DFN package. They have built-in high perfor-

mance output buffers and are guaranteed monotonic.

These parts establish new board-density benchmarks for

16- and 14-bit DACs and advance performance standards

for output drive and load regulation in single-supply,

voltage-output DACs.

The parts use a 2-wire, I2C compatible serial interface. The

LTC2607/LTC2617/LTC2627 operate in both the standard

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

of 400kHz). An asynchronous DAC update pin (LDAC) is

also included.

The LTC2607/LTC2617/LTC2627 incorporate a power-on

reset circuit. During power-up, the voltage outputs rise less

than 10mV above zero scale; and after power-up, they stay

at zero scale until a valid write and update take place. The

power-on reset circuit resets the LTC2607-1/LTC2617-1/

LTC2627-1 to midscale. The voltage outputs stay at

midscale until a valid write and update takes place.

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

All other trademarks are the property of their respective owners. Protected by U.S. Patents

including 5396245 and 6891433. Patent Pending

BLOCK DIAGRA

REFLO

GND

11

10

VOUTA 12

12-/14-/16-BIT DAC

REF

VCC

9

8

12-/14-/16-BIT DAC

7 VOUTB

DAC REGISTER

DAC REGISTER

INPUT REGISTER

INPUT REGISTER

32-BIT SHIFT REGISTER

1

2

CA0 CA1

3

LDAC

2-WIRE INTERFACE

4

5

SCL

SDA

6

CA2

2607 BD

Differential Nonlinearity

(LTC2607)

1.0

VCC = 5V

0.8 VREF = 4.096V

0.6

0.4

0.2

0

–0.2

–0.4

–0.6

–0.8

–1.0

0

16384

32768

CODE

49152

65535

2607 G02

26071727f

1

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