Low-Power, Quad, 12-Bit

Voltage-Output DACs with Serial Interface

6

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Pin Description

PIN

NAME

FUNCTION

1

AGND

Analog Ground

2

FBA

DAC A Output Amplifier Feedback

3

OUTA

DAC A Output Voltage

4

OUTB

DAC B Output Voltage

5

FBB

DAC B Output Amplifier Feedback

6

REFAB

DAC A/DAC B Reference Voltage Input

7

CL

Active-Low Clear Input.

CL clears all DACs and registers. CL resets all outputs (OUT_, UPO, and DOUT)

to 0.

8

CS

Active-Low Chip-Select Input

9

DIN

Serial Data Input

10

SCLK

Serial Clock Input

11

DGND

Digital Ground

12

DOUT

Serial Data Output

13

UPO

User-Programmable Logic Output

14

PDL

Active-Low Power-Down Lockout. Drive

PDL low to lock out software shutdown.

15

REFCD

DAC C/DAC D Reference Voltage Input

16

FBC

DAC C Output Amplifier Feedback

17

OUTC

DAC C Output Voltage

18

OUTD

DAC D Output Voltage

19

FBD

DAC D Output Amplifier Feedback

20

Positive Power Supply

DYNAMIC RESPONSE 3V

MAX5500 toc12

10µs/div

OUTA

0.5V/div

SWITCHING FROM CODE 000 hex TO FB4 hex

OUTPUT AMPLIFIER GAIN = +1

DIGITAL FEEDTHROUGH 3V

(SCLK = 100kHz)

MAX5500 toc13

4µs/div

SCLK

1V/div

OUTA

AC-COUPLED

10mV/div

DACA CODE SET TO 800 hex

DIGITAL FEEDTHROUGH 5V

(SCLK = 100kHz)

MAX5500 toc14

2µs/div

SCLK

2V/div

OUTA

AC-COUPLED

10mV/div

DACA CODE SET TO 800 hex

Typical Operating Characteristics (continued)