14-Bit, 500Msps, Interpolating and Modulating

Dual DAC with CMOS Inputs

10

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Pin Description

PIN

NAME

FUNCTION

1

CLKP

2

CLKN

3, 4, 5, 24, 25,

42, 43

N.C.

Internally Connected. Do not connect.

6, 21, 30, 37

Digital Power Supply. Accepts a 1.71V to 1.89V supply range. Bypass each pin to ground with a

0.1µF capacitor as close to the pin as possible.

7–12, 15–20,

22, 23

A13–A0

A-Port Data Inputs.

Dual-port mode:

I-channel data input. Data is latched on the rising/falling edge (programmable) of the DATACLK.

Single-port mode:

I-channel and Q-channel data input, with SELIQ.

13, 44

CMOS I/O Power Supply. Accepts a 3.0V to 3.6V supply range. Bypass each pin to ground with a

0.1µF capacitor as close to the pin as possible.

14

DATACLK

Programmable Data Clock Input/Output. See the DATACLK Modes section for details.

26

SELIQ/B13

Select I-/Q-Channel Input or B-Port MSB Input.

Single-port mode:

If SELIQ = LOW, data is latched into Q-channel on the rising/falling edge (programmable) of

the DATACLK.

If SELIQ = HIGH, data is latched into I-channel on the rising/falling edge (programmable) of the

DATACLK.

Dual-port mode:

Q-channel MSB input.

27

DATACLK/B12

Alternate DATACLK Input/Output or B-Port Bit 12 Input.

Single-port mode:

See the DATACLK Modes section for details.

Dual-port mode:

Q-channel bit 12 input.

If unused connect to GND.

28, 29, 31–36,

38–41

B11–B0

B-Port Data Bits 11–0.

Dual-port mode:

Q-channel inputs. Data is latched on the rising/falling (programmable) edge of the DATACLK.

Single-port mode:

Connect to GND.

45

DOUT

Serial-Port Data Output

46

DIN

Serial-Port Data Input

47

SCLK

Serial-Port Clock Input. Data on DIN is latched on the rising edge of SCLK.

48

CS

Serial-Port Interface Select. Drive CS low to enable serial-port interface.

49

RESET

Reset Input. Set RESET low during power-up.

50

REFIO

Reference Input/Output. Bypass to ground with a 1µF capacitor as close to the pin as possible.

51

DACREF

Current-Set Resistor Return Path. For a 20mA full-scale output current, connect a 2k

Ω resistor between

FSADJ and DACREF. Internally connected to GND. DO NOT USE AS AN EXTERNAL GROUND

CONNECTION.

52

FSADJ

Full-Scale Adjust Input. This input sets the full-scale output current of the DAC. For a 20mA full-

scale output current, connect a 2k

Ω resistor between FSADJ and DACREF.