2.7 V to 5.5 V, 250 μA, Rail-to-Rail Output,

AD5663

Rev. 0

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FEATURES

Low power, dual 16-bit nanoDAC

Relative accuracy: ±12 LSBs maximum

Guaranteed monotonic by design

10-lead MSOP and 3 mm × 3 mm LFCSP_WD

2.7 V to 5.5 V power supply

Per channel power-down

Power-on reset to zero scale or midscale

Hardware LDAC and CLR functions

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

CLR

INPUT

REGISTER

INPUT

REGISTER

DAC

REGISTER

DAC

REGISTER

GND

POWER-ON

RESET

STRING

DAC A

STRING

DAC B

BUFFER

BUFFER

POWER-DOWN

LOGIC

AD5663

LDAC

LDAC

Figure 1.

Table 1. Related Devices

Part No.

Description

AD5623R/AD5643R/AD5663R

2.7 V to 5.5 V, dual 12-/14-/16-bit

DACs with internal reference

GENERAL DESCRIPTION

The AD5663, a member of the nanoDAC family, is a low power,

dual, 16-bit buffered voltage-out DAC that operates from a single

2.7 V to 5.5 V supply and is guaranteed monotonic by design.

The AD5663 requires an external reference voltage to set the

output range of the DAC. The part incorporates a power-on

reset circuit that ensures the DAC output powers up to 0 V or

midscale (AD5663-1) and remains there until a valid write takes

place. The part contains 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 this part in normal operation

makes it ideally suited to portable, battery-operated equipment.

The power consumption is 1.25 mW at 5 V, going down to

2.4 μW in power-down mode.

The on-chip precision output amplifier of the AD5663 allows

rail-to-rail output swing to be achieved.

The AD5663 uses a versatile, 3-wire serial interface that

operates at clock rates up to 50 MHz and is compatible with

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

standards.

PRODUCT HIGHLIGHTS

1.

Dual 16-bit DAC; relative accuracy of ±12 LSBs maximum.

2.

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

LFCSP_WD packages.

3.

Low power; typically consumes 0.6 mW at 3 V and

1.25 mW at 5 V.

4.

7 μs maximum settling time.