AD5398 Datasheet | Analog Devices

FEATURES 120 m A current sink Available in 8-lead LFCSP package 2-wire (I2C®-patible) 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 REFERENCE POWER-ON RESET SDA 3 SCL 4 I2C SERIAL INTERFACE 10-BIT CURRENT OUTPUT DAC ISINK R PD 1 5 2 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 m A 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-patible) serial interface that operates at clock rates up to 400 k Hz. 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 camera phones, digital still cameras, and camcorders. The AD5398 also has many industrial applications, such as controlling temperature, light, and movement, over the range - 40°C to +85°C without derating. The I2C address range for the AD5398 is 0x18 to 0x1F inclusive. INDUSTRIAL APPLICATIONS Heater control Fan control Cooler (Peltier) control Solenoid control Valve control Linear actuator control Light control Current loop control Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog...