AD5570

Rev. 0 | Page 9 of 24

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

CLR

3

LDAC

4

SYNC

5

SCLK

6

SDIN

7

SDO

8

REFGND

REFIN

REFGND

AGNDS

16

15

14

13

12

AGND

PD

DGND

11

10

9

AD5570

TOP VIEW

(Not to Scale)

Figure 5. 16-Lead SSOP Pin Configuration (RS-16)

Table 5. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

Negative Analog Supply Voltage. −12 V ± 5% to −15 V ± 10% for specified performance.

2

Positive Analog Supply Voltage. 12 V ± 5% to 15 V ± 10% for specified performance.

3

CLR

untouched.

4

LDAC

Active Low Control Input. Transfers the contents of the input register to the DAC register. LDAC may be tied

permanently low, enabling the outputs to be updated on the rising edge of SYNC.

5

SYNC

Active Low Control Input. This is the frame synchronization signal for the data. When SYNC goes low, it powers

on the SCLK and SDIN buffers and enables the input shift register. Data is transferred in on the falling edges of

the following 16 clocks.

6

SCLK

Serial Clock Input. Data is clocked into the input register on the falling edge of the serial clock input. Data can

be transferred at rates of up to 8 MHz.

7

SDIN

Serial Data Input. This device has a 16-bit register. Data is clocked into the register on the falling edge of the

serial clock input.

8

SDO

Serial Data Output. Can be used for daisy chaining a number of devices together or for reading back the data in

the shift register for diagnostic purposes. This is an open-drain output; it should be pulled to logic high with an

external pull-up resistor of ~5 kΩ.

9

DGND

Digital Ground. Ground reference for all digital circuitry.

10

PD

Active Low Control Input. Allows the DAC to be put into a power-down state.

11

AGND

Analog Ground. Ground reference for all analog circuitry.

12

AGNDS

Analog Ground Sense. This is normally tied to AGND.

13

Analog Output Voltage.

14

REFGND

This pin should be tied to 0 V.

15

REFIN

Voltage Reference Input. This is internally buffered before being applied to the DAC. For bipolar ±10 V output

range, REFIN is 5 V.

16

REFGND

This pin should be tied to 0 V.