21

Maxim Integrated

9-Channel, 14-Bit Current DAC

with SPI Interface

MAX5113

01h–09h: Individual DAC (1 to 9) Configuration Registers

Note: Any change to individual DAC configuration settings resets the affected DAC code to 0000h.

BIT

15

14

13

12

11

10

9

8

NAME

GSW

CLR_CFG[1:0]

T/H_EN

RNG

MUX[3:1]

DEFAULT

1

0

0

0

1

0

1

0

BIT

7

6

5

4

3

2

1

0

NAME

MUX0

X

X

X

X

X

X

X

DEFAULT

0

0

0

0

0

0

0

0

BIT

NAME

DESCRIPTION

15

GSW

Ground Switch Control

0: Output is left open when DAC code = 0000h

1: Output is connected to ground when DAC code = 0000h. For DACs 1 and 2, this setting

applies to the active mux output.

14:13

CLR_CFG[1:0]

Clear Configuration Settings (determine how CLR pin affects each DAC)

00 (Ignore): The DAC is not affected by the CLR pin (default)

01 (Shutter): DAC output polarity is held negative (current level determined by 1Bh) as long

as the CLR pin is asserted (level sensitive, applies to DAC 6 only; otherwise, implements the

ignore function)

10 (Gate): DAC output is held at zero scale (with ground switches engaged if enabled) as

long as the CLR pin is asserted (level sensitive)

11 (Reset): DAC output is set to zero scale (with ground switches engaged if enabled) when

CLR is asserted and remains valid after CLR is removed (edge sensitive)

12

T/H_EN

Track and Hold Enable

0: Track and Hold disabled

1: Track and Hold enabled

11

RNG

Range (DAC 3, 8, and 9)

0: DAC full-scale output level is set to high range.

1: DAC full-scale output level is set to low range.

Note: For all DACs not supporting RNG settings, this bit is reserved and should be set to 1

(default).

10:7

MUX[3:0]

Output Mux Settings for DAC (mux settings are only supported for DAC 1 and DAC 2)

0000: Output A active, all others high impedance

0001: Output B active, all others high impedance

0010: Output C active, all others high impedance

0011: Output D active, all others high impedance

01XX: All outputs high impedance (open)

1000: Output A active, all others shunted to GND

1001: Output B active, all others shunted to GND

1010: Output C active, all others shunted to GND

1011: Output D active, all others shunted to GND

11XX: All outputs shunted to GND (default)

6:0

X

Reserved