AD5378 Datasheet

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32-Channel, 14-Bit, Parallel and

Serial Input, Bipolar Voltage Output DAC

Preliminary Technical Data

FEATURES

32-channel DAC in 13 mm 脳 13 mm 108-lead CSPBGA

Guaranteed monotonic to 14 bits

Buffered voltage outputs

Output voltage span of 3.5 V 脳 V

REF

(+)

Maximum output voltage span of 17.5 V

System calibration function allowing user-programmable

offset and gain

Pseudo differential outputs relative to REFGND

Clear function to user-defined REFGND (CLR pin)

Simultaneous update of DAC outputs (LDAC pin)

DAC increment/decrement mode

Channel grouping and addressing features

AD5378

Interface options

Parallel interface

DSP/microcontroller-compatible 3-wire serial interface

2.5 V to 5.5 V JEDEC-compliant digital levels

SDO daisy-chaining option

Power-on reset

Digital reset (RESET pin and soft reset function)

APPLICATIONS

Level setting in automatic test equipment (ATE)

Variable optical attenuators (VOAs)

Optical switches

Industrial control systems

FUNCTIONAL BLOCK DIAGRAM

V

CC

POWER-ON

RESET

RESET

DCEN/WR

SYNC/CS

REG0

REG1

DB13

SCLK/DB12

DIN/DB11

14

V

DD

V

SS

AGND

DGND

LDAC

V

BIAS

V

REF

1(+) V

REF

1(鈥? REFGND A1

VBIAS

CLR

AD5378

/

INPUT

14

REG

0鈥?

14

/

m REG0鈥?

c REG0鈥?

14

/

DAC

14

REG

0鈥?

/

DAC 0鈥?

VOUT 0

VOUT 1

/

STATE MACHINE

14

INTERFACE

DB0

A7

/

INPUT 14

REG

2

14

/

m REG2

c REG2

14

/

DAC 14

REG

2

/

DAC 2

VOUT 2

14

/

14

/

VOUT 3

A0

SER/PAR

DIN

SCLK

SDO

FIFOEN

REFGND B1

REFGND B2

REFGND C1

REFGND C2

REFGND D1

REFGND D2

BUSY

14

14

/

INPUT

14

REG

5

14

/

m REG7

c REG7

14

/

DAC

14

REG

5

VOUT 4

/

DAC 5

VOUT 5

/

/

/

INPUT 14

REG

6鈥?

14

/

DAC 14

REG

6鈥?

/

DAC 6鈥?

VOUT 6

VOUT 7

VOUT 8

VOUT 31

05292-001

/

m REG8鈥?

c REG8鈥?

脳4

V

REF

2(+) V

REF

2(鈥? REFGND A2

Figure 1.

Protected by U.S. Patent No. 5,969,657 and 6,823,416; other patents pending.

Rev. PrA

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 2005 Analog Devices, Inc. All rights reserved.

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