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
