32-Channel 12-Bit 3 V/5 V Single-Supply Voltage-Output DAC

The AD5383 is a complete, single-supply, 32-channel, 12-bit denseDAC® available in a 100-lead LQFP package. All 32 channels have an on-chip output amplifier with rail-to-rail operation. The AD5383 includes a programmable 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 optimization of the amplifier slew rate. The AD5383 features:

* Double-buffered parallel interface with a 20 ns WR pulse width.

* SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface with interface speeds in excess of 30 MHz

* I2C-compatible interface that supports a 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 that allows the user to fully calibrate any DAC channel. With boost off, power consumption is typically 0.25 mA/channel.

APPLICATIONS

* Variable optical attenuators (VOA)

* Level setting (ATE)

* Optical microelectro-mechanical systems (MEMS)

* Control systems

* Instrumentation

* Guaranteed Monotonic

* High Accuracy (INL = ±1 LSB)

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

* Temperature range: –40°C to +85°C

* Rail-to-rail output amplifier

* Power-down mode

* Package type: 100-lead LQFP (14 mm × 14 mm)