AD5381

40通道， 3 V / 5 V单电源， 12位电压输出DAC 40-Channel, 3 V/5 V, Single-Supply, 12-Bit, Voltage Output DAC

Product Details

The 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 wiht rail-to-rail operarion. 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. 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 chan-nel. Power consumption is typically 0.25 mA/channel with boost mode disabled.

**Applications**

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Variable optical attenuators VOAs

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Level setting ATE

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Optical micro-electro-mechanical systems MEMs

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Control systems

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Instrumentation

### Features and Benefits

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Guaranteed Monotonic

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INL error: ±1 LSB max

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

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Temperature range: –40°C to +85°C

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Rail-to-rail output amplifier

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Power-down

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Package type: 100-lead LQFP 14 mm × 14 mm

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User interfaces:  Parallel Serial SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible, featuring data readback

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I2C®-compatible

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Robust 6.5 kV HBM and 2 kV FICDM ESD rating

INTEGRATED FUNCTIONS

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Channel monitor

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Simultaneous output update via LDAC

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Clear function to user-programmable code

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Amplifier boost mode to optimize slew rate

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User-programmable offset and gain adjust

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Toggle mode enables square wave generation

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Thermal monitors