The AD5380 is a complete， single-supply， 40-channel， 14-bit denseDAC? available in a 100-lead LQFP package. All 40 channels have an on-chip output amplifier with rail-to-rail operation. The AD5380 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 that allows optimization of the amplifier slew rate. The AD5380 contains a double-buffered parallel interface that features a 20 ns WR pulse width， an SPI-， QSPI-， -MICROWIRE， -DSP compatible serial interface with interface speeds in excess of 30 MHz， and an I2 C-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 off.