40-Channel, 3 V/5 V, Single-Supply,12-Bit, DAC

The AD5381 is a complete, single-supply, 40-channel, 12-Bit DAC available in a 100-lead LQFP package. All 40 channels have an on-chip output amplifier with rail-to-rail operation. The AD5381 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, which allows optimization of the amplifier slew rate. The AD5381 contains a double-buffered parallel interface featuring 20 ns WR pulse width, an SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface with interface speeds in excess of 30 MHz, and an 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. Power consumption is typically 0.25 mA/channel with boost mode disabled.

APPLICATIONS

* Variable optical attenuators (VOAs)

* Level setting (ATE)

* Optical micro-electro-mechanical systems (MEMS)

* Control systems

* Instrumentation

* Guaranteed Monotonic

* INL error: ±1 LSB max

* On-Chip 1.25 V/2.5 V Reference With 10 ppm/ºC TempCo

* Temperature range: –40°C to +85°C

* Rail-to-rail output amplifier

* Power-down

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

* I2C®-compatible

* Robust 6.5 kV HBM and 2 kV FICDM ESD rating