2.7 V to 5.5 V, 450 µA, Rail-to-Rail Output,

Quad, 12-/16-Bit nanoDACs

Data Sheet

AD5624/AD5664

Rev. A

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FEATURES

Low power, quad nanoDACs

AD5664: 16 bits

AD5624: 12 bits

Relative accuracy: ±12 LSBs max

Guaranteed monotonic by design

10-lead MSOP and 3 mm × 3 mm LFCSP_WD

2.7 V to 5.5 V power supply

Power-on reset to zero

Per channel power-down

Serial interface, up to 50 MHz

APPLICATIONS

Process control

Data acquisition systems

Portable battery-powered instruments

Digital gain and offset adjustment

Programmable voltage and current sources

Programmable attenuators

FUNCTIONAL BLOCK DIAGRAM

INTERFACE

LOGIC

SCLK

SYNC

DIN

INPUT

REGISTER

DAC

REGISTER

GND

POWER-ON

RESET

STRING

DAC A

BUFFER

INPUT

REGISTER

DAC

REGISTER

STRING

DAC B

BUFFER

INPUT

REGISTER

DAC

REGISTER

STRING

DAC C

BUFFER

INPUT

REGISTER

DAC

REGISTER

STRING

DAC D

BUFFER

AD5624/AD5664

POWER-DOWN

LOGIC

Figure 1.

GENERAL DESCRIPTION

The AD5624/AD5664, members of the nanoDAC® family, are

low power, quad, 12-, 16-bit buffered voltage-out DACs that

operate from a single 2.7 V to 5.5 V supply and are guaranteed

monotonic by design.

The AD5624/AD5664 require an external reference voltage to

set the output range of the DAC. The device 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

devices contain a 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 these devices in normal

operation makes them ideally suited to portable battery-

operated equipment. The power consumption is 2.25 mW at 5

V, going down to 2.4 μW in power-down mode.

The AD5624/AD5664 on-chip precision output amplifier allows

rail-to-rail output swing to be achieved.

The AD5624/AD5664 use a versatile 3-wire serial interface that

operates at clock rates up to 50 MHz, and are compatible with

standard SPI®, QSPI™, MICROWIRE™, and DSP interface

standards.

PRODUCT HIGHLIGHTS

1.

Relative accuracy: ±12 LSBs maximum.

2.

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

LFCSP_WD.

3.

Low power, typically consumes 1.32 mW at 3 V and

2.25 mW at 5 V.

4.

Maximum settling time of 4.5 μs (AD5624) and 7 μs

(AD5664).

Table 1. Related Devices

Part No.

Description

AD5624R/AD5644R/AD5664R

2.7 V to 5.5 V quad, 12-, 14-,

16-bit DACs with internal

reference