AD5546 datasheet(7/20 Pages) AD

Part #	AD5546

Description	Current Output, Parallel Input, 16-/14-Bit Multiplying DACs with Four-Quadrant Resistors

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Data Sheet

AD5546/AD5556

Rev. D | Page 7 of 20

Pin No.

Mnemonic

Description

13

REF

DAC Reference Input in Two-Quadrant Mode and R2 Terminal in Four-Quadrant Mode. In two-quadrant mode, this

pin is the reference input with constant input resistance vs. code. In four-quadrant mode, this pin is driven by the

external reference amplifier.

14

IOUT

DAC Current Output. Connects to the inverting node of an external op amp for I-V conversion.

15

LDAC

Digital Input Load DAC Control. The signal level must be ≤ VDD + 0.3 V.

16

WR

Write Control Digital Input in Active Low. Transfers shift-register data to the DAC register on the rising edge. The

signal level must be ≤ VDD + 0.3 V.

17

MSB

Power On Reset State. MSB = 0 resets at zero scale; MSB = 1 resets at midscale. The signal level must be

≤ VDD + 0.3 V.

18

RS

Reset in Active Low. Resets to zero scale if MSB = 0 and resets to midscale if MSB = 1. The signal level must be

≤ VDD + 0.3 V.

19

GND

Analog and Digital Grounds.

20 to 27

D13 to D6

Digital Input Data Bits[D13:D6]. The signal level must be ≤ VDD + 0.3 V.

28

VDD

Positive Power Supply Input. Specified range of operation: 2.7 V to 5.5 V.

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