GENERAL DESCRIPTION
The AD5381 is a complete, single-supply, 40-channel, 12-bit denseDAC® 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 MON_OUT pin for external monitoring, and an output amplifier boost mode, which allows optimization of the amplifier slew rate.

FEATURES
    Guaranteed monotonic
    INL error: ±1 LSB max
    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
    Package type: 100-lead LQFP (14 mm × 14 mm)
    User interfaces:
        Parallel
        Serial (SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible,
            featuring data readback)
        I2C®-compatible
    Robust 6.5 kV HBM and 2 kV FICDM ESD rating

INTEGRATED FUNCTIONS
    Channel monitor
    Simultaneous output update via LDAC
    Clear function to user-programmable code
    Amplifier boost mode to optimize slew rate
    User-programmable offset and gain adjust
    Toggle mode enables square wave generation
    Thermal monitors

APPLICATIONS
    Variable optical attenuators (VOAs)
    Level setting (ATE)
    Optical micro-electro-mechanical systems (MEMs)
    Control systems
    Instrumentation