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AD5821

Analog Devices
Part Number AD5821
Manufacturer Analog Devices
Description single 10-bit digital-to-analog converter
Published Mar 26, 2007
Detailed Description www.DataSheet4U.com 120 mA, Current Sinking, 10-Bit, I2C® DAC AD5821 FEATURES 120 mA current sink Available in 3 × 3 ar...
Datasheet PDF File AD5821 PDF File

AD5821
AD5821

Overview
www.
DataSheet4U.
com 120 mA, Current Sinking, 10-Bit, I2C® DAC AD5821 FEATURES 120 mA current sink Available in 3 × 3 array WLCSP package 2-wire (I2C-compatible) 1.
8 V serial interface 10-bit resolution Integrated current sense resistor 2.
7 V to 5.
5 V power supply Guaranteed monotonic over all codes Power-down to 0.
5 μA typical Internal reference Ultralow noise preamplifier Power-down function Power-on reset INDUSTRIAL APPLICATIONS Heater controls Fan controls Cooler (Peltier) controls Solenoid controls Valve controls Linear actuator controls Light controls Current loop controls GENERAL DESCRIPTION The AD5821 is a single 10-bit digital-to-analog converter with 120 mA output current sink capability.
It features an internal reference and operates from a single 2.
7 V to 5.
5 V supply.
The DAC is controlled via a 2-wire (I2C-compatible) serial interface that operates at clock rates up to 400 kHz.
The AD5821 incorporates a power-on reset circuit that ensures that 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 1 μA maximum.
The AD5821 is designed for autofocus, image stabilization, and optical zoom applications in camera phones, digital still cameras, and camcorders.
The AD5821 also has many industrial applications, such as controlling temperature, light, and movement, over the range of −40°C to +85°C without derating.
The I2C address for the AD5821 is 0x18.
CONSUMER APPLICATIONS 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 FUNCTIONAL BLOCK DIAGRAM XSHUTDOWN REFERENCE POWER-ON RESET SDA SCL I2C SERIAL INTERFACE 10-BIT CURRENT OUTPUT DAC VDD D1 ISINK VDD DGND R AD5821 DGND RSENSE 3.
3Ω 05950-001 AGND Figure 1.
Rev.
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