The AD5444 is CMOS 12-bit current output, digital-to-analog converters (DACs). Operating from a single 2.5V to 5.5V power supply, these devices are suited for battery-powered and other applications.
As a result of the CMOS submicron manufacturing process, these parts offer excellent 4-quadrant multiplication characteristics of up to 12MHz.
These DACs use a double-buffered, 3-wire serial interface that is compatible with SPI®, QSPI™, MICROWIRE™, and most DSP interface standards. On power-up, the internal shift register and latches are filled with 0s, and the DAC output is at zero scale.
The applied external reference input voltage (VREF) determines the full-scale output current. These parts can handle ±10 V inputs on the reference, despite operating from a single-supply power supply of 2.5V to 5.5V. An integrated feedback resistor (RFB) provides temperature tracking and full-scale voltage output when combined with an external current-to-voltage precision amplifier.
- 12-bit current output DACs
- +2.5 V to +5.5 V Supply Operation
- 50 MHz Serial Interface
- 10 MHz Multiplying Bandwidth
- 2.5 MSPS update rate
- ±10 V reference input
- Low glitch energy < 2 nV-s
- Extended temperature range -40°C to +125°C
- 10-lead MSOP package
- Guaranteed Monotonic
- Four Quadrant Multiplication
- Power On reset with brownout detection
- Daisy Chain Mode
- Readback Function
- 0.4 µA typical power consumption
- Applications
- Portable battery-powered applications
- Waveform generators
- Instrumentation
- Programmable amplifiers and attenuators
- Digitally controlled calibration
- Programmable filters and oscillators
- Composite video
- Ultrasound
- Gain, offset, and voltage trimming
