AD5541/AD5542

–5–

REV. A

AD5541 PIN FUNCTION DESCRIPTIONS

Mnemonic

Pin No.

Description

1

Analog Output Voltage from the DAC.

AGND

2

Ground Reference Point for Analog Circuitry.

REF

3

This is the voltage reference input for the DAC. Connect to external 2.5 V reference.

CS

4

This is a logic input signal. The chip select signal is used to frame the serial data input.

SCLK

5

Clock Input. Data is clocked into the input register on the rising edge of SCLK. Duty cycle

must be between 40% and 60%.

DIN

6

Serial Data Input. This device accepts 16-bit words. Data is clocked into the input register on

the rising edge of SCLK.

DGND

7

Digital Ground. Ground reference for digital circuitry.

8

Analog Supply Voltage, 5 V

± 10%.

Mnemonic

Pin No.

Description

RFB

1

Feedback Resistor. In bipolar mode connect this pin to external op amp output.

2

Analog Output Voltage from the DAC.

AGNDF

3

Ground Reference Point for Analog Circuitry (Force).

AGNDS

4

Ground Reference Point for Analog Circuitry (Sense).

REFS

5

This is the voltage reference input (sense) for the DAC. Connect to external 2.5 V reference.

REFF

6

This is the voltage reference input (force) for the DAC. Connect to external 2.5 V reference.

CS

7

This is a logic input signal. The chip select signal is used to frame the serial data input.

SCLK

8

Clock input. Data is clocked into the input register on the rising edge of SCLK. Duty cycle

must be between 40% and 60%.

NC

9

No Connect.

DIN

10

Serial Data Input. This device accepts 16-bit words. Data is clocked into the input register on

the rising edge of SCLK.

LDAC

11

LDAC Input. When this input is taken low, the DAC register is simultaneously updated with

the contents of the input register.

DGND

12

Digital Ground. Ground reference for digital circuitry.

INV

13

Connected to the Internal Scaling Resistors of the DAC. Connect INV pin to external op amps

inverting input in bipolar mode.

14

Analog Supply Voltage, 5 V

± 10%.

AD5542 PIN FUNCTION DESCRIPTIONS

AD5541 PIN CONFIGURATION

SOIC

TOP VIEW

(Not to Scale)

8

7

6

5

1

2

3

4

AGND

REF

DGND

DIN

SCLK

CS

AD5541

AD5542 PIN CONFIGURATION

SOIC

TOP VIEW

(Not to Scale)

14

13

12

11

10

9

8

1

2

3

4

5

6

7

NC = NO CONNECT

RFB

AGNDF

AGNDS

REFS

REFF

CS

INV

DGND

LDAC

DIN

NC

SCLK

AD5542