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40-Channel, 3 V/5 V, Single-Supply,

12-Bit, Voltage Output DAC

AD5381

FEATURES

Guaranteed monotonic

INL error: 鹵1 LSB max

On-chip 1.25 V/2.5 V, 10 ppm/擄C reference

Temperature range: 鈥?0擄C to +85擄C

Rail-to-rail output amplifier

Power-down

Package type: 100-lead LQFP (14 mm 脳 14 mm)

User Interfaces:

Parallel

Serial (SPI廬/QSPI鈩?MICROWIRE鈩?DSP compatible,

featuring data readback)

2

I C廬 compatible

INTEGRATED FUNCTIONS

Channel monitor

Simultaneous output update via LDAC

Clear function to user programmable code

Amplifier boost mode to optimize slew rate

User programmable offset and gain adjust

Toggle mode enables square wave generation

Thermal monitors

APPLICATIONS

Variable optical attenuators (VOA)

Level setting (ATE)

Optical micro-electro-mechanical systems (MEMs)

Control systems

Instrumentation

AGND (脳5)

DAC GND (脳5)

REFGND

REFOUT/REFIN

SIGNAL GND (脳5)

FUNCTIONAL BLOCK DIAGRAM

DVDD (脳3)

PD

SER/PAR

FIFO EN

CS/(SYNC/AD 0)

WR/(DCEN/AD 1)

SDO

DB11/(DIN/SDA)

DB10/(SCLK/SCL)

DB9/(SPI/I2C)

DB8

12

INPUT 12

REG 0

12

FIFO

+

STATE

MACHINE

+

CONTROL

LOGIC

12

m REG 0

c REG 0

R

12

INPUT 12

REG 1

12

12

m REG 1

c REG 1

R

VOUT4

12

POWER-ON

RESET

INPUT 12

REG 6

12

12

m REG 6

c REG 6

R

12

INPUT 12

REG 7

12

39-TO-1

MUX

12

m REG 7

c REG 7

R

03732-0-001

DGND (脳3)

AVDD (脳5)

AD5381

1.25V/2.5V

REFERENCE

12

DAC 12

REG 0

DAC 0

VOUT0

R

DB0

A5

A0

REG 0

REG 1

RESET

BUSY

CLR

INTERFACE

CONTROL

LOGIC

12

DAC 12

REG 1

DAC 1

VOUT1

VOUT2

R

VOUT3

12

DAC 12

REG 6

DAC 6

VOUT5

VOUT6

R

V

OUT

0鈥︹€︹€

OUT

38

12

DAC 12

REG 7

DAC 7

VOUT7

VOUT8

R

VOUT38

脳5

VOUT 39/MON_OUT

LDAC

Figure 1.

Rev. A

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.326.8703

漏 2004 Analog Devices, Inc. All rights reserved.

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