AD5398

www.DataSheet4U.com 120 mA, Current Sinking, 10-Bit, I2C DAC AD5398 FEATURES 120 mA current sink Available in 8-lead LFCSP package 2-wire (I2C®-compatible) 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 FUNCTIONAL BLOCK DIAGRAM VDD 6 AD5398 REFERENCE POWER-ON RESET SDA 3 SCL 4 I2C SERIAL INTERFACE 10-BIT CURRENT OUTPUT DAC 8 ISINK R PD 1 5 2 7 DGND DGND AGND Figure 1. CONSUMER APPLICATIONS Lens autofocus Image stabilization Optical zoom Shutters Iris/exposure Neutral density filter NDFs Lens covers Camera phones Digital still cameras Camera modules Digital video cameras (DVCs)/camcorders Camera-enabled devices Security cameras Web/PC cameras GENERAL DESCRIPTION The AD5398 is a single 10-bit DAC 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 AD5398 incorporates a power-on reset circuit, which 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 max. The AD5398 is designed for autofocus, image stabilization, and optical zoom applications in came...