40-Channel, 3 V/5 V Single-Supply, Serial 14-Bit DAC

The AD5384 is a complete single-supply, 40-channel, 14-bit digital-to-analog converter (DAC) available in a 100-ball CSPBGA package. All 40 channels have an on-chip output amplifier with rail-to-rail operation. The AD5384 includes an internal 1.25 V/2.5 V, 10 ppm/°C reference, an on-chip channel monitor function that multiplexes the analog outputs to a common MONOUT pin for external monitoring, and an output amplifier boost mode that allows the amplifier slew rate to be optimized. The AD5384 contains a serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards with interface speeds in excess of 30 MHz and an I2C-compatible interface supporting 400 kHz data transfer rate. An input register followed by a DAC register provides double buffering, allowing the DAC outputs to be updated independently or simultaneously, using the LDAC input. Each channel has a programmable gain and offset adjust register letting the user fully calibrate any DAC channel. Power consumption is typically 0.25 mA per channel with boost mode off.

APPLICATIONS

* Variable optical attenuators (VOAs)

* Level settings (automatic test equipment{ATE})

* Optical micro-electromechanical systems (MEMS) control systems

* Instrumentation

* Guaranteed Monotonic

* Relative Accuracy (INL): ±4 LSB max

* On-chip 1.25 V/2.5 V, 10 ppm/°C reference

* Temperature range: −40°C to +85°C

* Package Type: 100-ball CSPBGA

* Serial SPI-/QSPI™/MICROWIRE®/DSP-compatible, featuring Data Readback Mode

* I2C Compatible Serial Interface