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

Preliminary Technical Data

AD5662

Rev. PrA

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FEATURES

True 12-bit accuracy guaranteed

Tiny 8-lead SOT-23/MSOP package

Power-down to 200 nA @ 5 V, 50 nA @ 3 V

Power-on-reset to zero/midscale

2.7 V to 5.5 V power supply

Guaranteed 16-bit monotonic by design

3 power-down functions

Serial interface with Schmitt-triggered inputs

Rail-to-rail operation

SYNC interrupt facility

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

AD5662

REF(+)

RESISTOR

NETWORK

POWER-DOWN

CONTROL LOGIC

DAC

REGISTER

POWER-ON

RESET

OUTPUT

BUFFER

16-BIT

DAC

INPUT

CONTROL

LOGIC

SYNC

SCLK

DIN

Figure 1.

GENERAL DESCRIPTION

devices. They are low power, single, 16-bit buffered voltage-out

DACs. All devices operate from a single 2.7 V to 5.5 V, and are

guaranteed monotonic by design.

The AD5662 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

(AD5662x-1) or midscale (AD5662x-2), 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

200 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 0.7 mW at 5 V, reducing to 1 µW in

power-down mode.

The AD5662’s on-chip precision output amplifier allows rail-to-

rail output swing to be achieved. The AD5662 utilizes a versatile

3-wire serial interface that operates at clock rates up to 30 MHz,

and is compatible with standard SPI™, QSPI™, MICROWIRE™,

and DSP interface standards.

The AD5662 is designed with new technology, and is the next

generation to the AD53xx family.

PRODUCT HIGHLIGHTS

1.

16-bit DAC; true 12-bit accuracy guaranteed.

2.

Available in 8-lead SOT-23 and 8-lead MSOP package.

3.

Power-on-reset to zero or midscale.

4.

Low power. Operates with 2.7 V to 5.5 V supply. Typically

consumes 0.35 mW at 3 V and 0.7 mW at 5 V, making it

ideal for battery-powered applications.

5.

Power-down capability. When powered down, the DAC

typically consumes 50 nA at 3 V and 200 nA at 5 V.

6.

10 µs settling time.

RELATED DEVICES

Part No.

Description

AD5620/AD5640/AD5660

3 V/5 V 12-/14-/16-bit DAC with

internal ref in Sot-23