120 mA, Current Sinking,

AD5398A

Rev. 0

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FEATURES

Current sink: 120 mA

10-bit resolution

Integrated current sense resistor

Power supply: 2.7 V to 5.5 V

Guaranteed monotonic over all codes

Power down to: 0.5 μA typical

Internal reference

Ultralow noise preamplifier

Power-down function

Power-on reset

Available in 3 × 3 array WLCSP package

APPLICATIONS

Consumer

Lens autofocus

Image stabilization

Optical zoom

Shutters

Iris/exposure

Neutral density (ND) filters

Lens covers

Camera phones

Digital still cameras

Camera modules

Digital video cameras/camcorders

Camera-enabled devices

Security cameras

Web/PC cameras

Industrial

Heater control

Fan control

Cooler (Peltier) control

Solenoid control

Valve control

Linear actuator control

Light control

Current loop control

GENERAL DESCRIPTION

The AD5398A is a single, 10-bit digital-to-analog converter

(DAC) with a current sink output capability of 120 mA. This

device features an internal reference and operates from a

single 2.7 V to 5.5 V supply. The DAC is controlled via a

at clock rates up to 400 kHz.

The AD5398A incorporates a power-on reset circuit, which

ensures the DAC output powers up to 0 V and remains there

until a valid write takes place. It has a power-down feature

that reduces the current consumption of the device to 0.5 μA

typically.

The AD5398A is designed for autofocus, image stabilization,

and optical zoom applications in camera phones, digital still

cameras, and camcorders. The AD5398A is also suitable for

many industrial applications, such as controlling temperature,

light, and movement without derating, over temperatures

AD5398A is 0x18 to 0x1F inclusive.

FUNCTIONAL BLOCK DIAGRAM

POWER-ON

RESET

D1

SDA

AGND

DGND

SCL

PD

3.3Ω

INTERFACE

10-BIT

CURRENT

OUTPUT DAC

REFERENCE

R

AD5398A

DGND

Figure 1.