Quad, 12-/14-/16-Bit nanoDACs with

5 ppm/°C On-Chip Reference

Data Sheet

AD5624R/AD5644R/AD5664R

Rev. D

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FEATURES

Low power, smallest pin-compatible, quad nanoDACs

AD5664R: 16 bits

AD5644R: 14 bits

AD5624R: 12 bits

User-selectable external or internal reference

External reference default

On-chip 1.25 V/2.5 V, 5 ppm/°C reference

10-lead MSOP; 10-lead, 3 mm × 3 mm LFCSP_WD; and

12-ball, 1.665 mm × 2.245 mm WLCSP

2.7 V to 5.5 V power supply

Guaranteed monotonic by design

Power-on reset to zero scale

Per channel power-down

Serial interface, up to 50 MHz

APPLICATIONS

Process controls

Data acquisition systems

Portable battery-powered instruments

Digital gain and offset adjustment

Programmable voltage and current sources

Programmable attenuators

FUNCTIONAL BLOCK DIAGRAM

BUFFER

BUFFER

AD5624R/AD5644R/AD5664R

1.25V/2.5V REF

GND

POWER-

DOWN

LOGIC

POWER-ON

LOGIC

SCLK

SYNC

DIN

STRING

DAC A

STRING

DAC B

STRING

DAC C

STRING

DAC D

DAC

REGISTER

DAC

REGISTER

DAC

REGISTER

DAC

REGISTER

INPUT

REGISTER

INPUT

REGISTER

INPUT

REGISTER

INPUT

REGISTER

INTERFACE

LOGIC

BUFFER

BUFFER

Figure 1.

Table 1. Related Devices

Part No.

Description

AD5624/AD5664

2.7 V to 5.5 V quad, 12-/16-bit DACs, external

reference

AD5666

2.7 V to 5.5 V quad, 16-bit DAC, internal

reference, LDAC, CLR pins

GENERAL DESCRIPTION

The AD5624R/AD5644R/AD5664R, members of the nanoDAC®

family, are low power, quad, 12-/14-/16-bit buffered voltage-

out DACs. All devices operate from a single 2.7 V to 5.5 V

supply and are guaranteed monotonic by design.

The AD5624R/AD5644R/AD5664R have an on-chip reference.

The AD56x4R-3 has a 1.25 V, 5 ppm/°C reference, giving a full-

scale output range of 2.5 V; the AD56x4R-5 has a 2.5 V,

5 ppm/°C reference giving a full-scale output range of 5 V. The

on-chip reference is off at power-up, allowing the use of an

external reference; all devices can be operated from a single

2.7 V to 5.5 V supply. The internal reference is enabled via a

software write.

The part incorporates a power-on reset circuit that ensures the

DAC output powers up to 0 V and remains there until a valid

write takes place. The part contains a per-channel power-down

feature that reduces the current consumption of the device to

480 nA at 5 V and provides software-selectable output loads

while in power-down mode. The low power consumption of

this part in normal operation makes it ideally suited to portable

battery-operated equipment.

The AD5624R/AD5644R/AD5664R use a versatile 3-wire serial

interface that operates at clock rates up to 50 MHz, and is com-

patible with standard SPI, QSPI™, MICROWIRE™, and DSP

interface standards. The on-chip precision output amplifier

enables rail-to-rail output swing.

PRODUCT HIGHLIGHTS

1.

Quad 12-/14-/16-bit DACs.

2.

On-chip 1.25 V/2.5 V, 5 ppm/°C reference.

3.

Available in 10-lead MSOP; 10-lead, 3 mm × 3 mm

LFCSP_WD; and 12-ball, 1.665 mm × 2.245 mm WLCSP.

4.

Low power, typically consumes 1.32 mW at 3 V and

2.25 mW at 5 V.