AD5778R
RECOMMENDED FOR NEW DESIGNS2-Channel, 300 mA Current Source Output 16-Bit SoftSpan DAC
- Part Models
- 1
- 1ku List Price
- Starting From $9.50
Part Details
- Per channel programmable output ranges: 300 mA, 200 mA, 100 mA, 50 mA, 25 mA, 12.5 mA, 6.25 mA, and 3.125 mA
- Flexible 2.85 V to 33 V supply voltage
- 1 V dropout guaranteed
- Separate voltage supply per output channel
- Internal switches to optional negative supply
- Full 16-bit resolution at all ranges
- Guaranteed operation –40°C to 125°C
- Precision (10 ppm/°C maximum) internal reference or external reference input
- Analog mux monitors, voltages, and currents
- A/B toggle via SPI or dedicated pin
- 1.8 V to 5 V SPI
- 32-lead (5 mm × 5 mm) QFN package
The AD5778R is a 2-channel, 16-bit current source digital-to-analog converter (DAC), providing two high-compliance current source outputs with a guaranteed 1 V dropout at 200 mA. The device supports load voltages of up to 32 V. There are eight current ranges, programmable per channel, with full-scale outputs of up to 300 mA. Additionally, the channels can be paralleled to allow for ultrafine adjustments of large currents or for combined outputs of up to 600 mA.
A dedicated supply pin is provided for every output channel. Each channel can be operated from 2.85 V to 33 V, and internal switches allow any output to be pulled to the optional negative supply.
The AD5778R includes a precision integrated 1.25 V reference (10 ppm/°C maximum), with the option to use an external reference.
The SPI-/Microwire-compatible 3-wire serial interface operates on logic levels as low as 1.71 V at clock rates up to 50 MHz.
APPLICATIONS
- Tunable lasers
- Semiconductor optical amplifiers
- Resistive heaters
- Current-mode biasing
- Proportional solenoid drive
Documentation
Data Sheet 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD5778RBCPZ | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
IBIS Model 1
Evaluation Kits
LTC2662 Demo Board | 5-Channel, 16-/12-Bit, 300mA, SoftSpan Current Source DACs
Resources
Software
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