AD5778RBCPZ

AD5778RBCPZ is a 2-channel, 16-bit current source digital-to-analogue converter (DAC), providing two high-compliance current source outputs with a guaranteed 1V dropout at 200mA. This device supports load voltages of up to 32V. There are eight current ranges, programmable per channel, with full-scale outputs of up to 300mA. Additionally, the channels can be paralleled to allow for ultrafine adjustments of large currents or for combined outputs of up to 600mA. A dedicated supply pin is provided for every output channel. Each channel can be operated from 2.85V to 33V, and internal switches allow any output to be pulled to the optional negative supply. The SPI-/Microwire-compatible 3-wire serial interface operates on logic levels as low as 1.71V at clock rates up to 50MHz. Applications include tunable lasers, semiconductor optical amplifiers, resistive heaters, current-mode biasing, proportional solenoid drive.

• Flexible 2.85V to 33V supply voltage, 1V dropout voltage guaranteed
• Separate voltage supply per output channel, internal switches to optional negative supply
• Analog mux monitors, voltages, and currents, A/B toggle via SPI or dedicated pin
• Integral nonlinearity is ±12LSB typical at (TJ = 25°C)
• Total unadjusted error is ±0.4%FSR typical at (300mA and 200mA output current ranges)
• VCC supply current is 2.6mA typical at (all ranges (code = 0, all channels))
• VCC shutdown current is 1μA typical at (TJ = 25°C)
• Gain error is ±0.3%FSR typical at (300mA and 200mA output current ranges)
• VREF output voltage noise density is 32nV/√Hz typical at (TJ = 25°C)
• Operating temperature range from -40°C to +125°C, 32-lead QFN package

注释

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