AD5449YRUZ-REEL

The AD5429/AD5439/AD5449 are CMOS, 8-, 10-, and 12-bit, dual-channel, current output digital-to-analog converters (DAC), respectively. These devices operate from a 2.5 V to 5.5 V power supply, making them suited to battery-powered and other applications. As a result of being manufactured on a CMOS submicron process, these parts offer excellent 4-quadrant multiplication characteristics, with large signal multiplying bandwidths of 10 MHz. The applied external reference input voltage (V_REF) determines the full-scale output current. An integrated feedback resistor (RFB) provides temperature tracking and full-scale voltage output when combined with an external current-to-voltage precision amplifier. These DACs use a double-buffered, 3-wire serial interface that is compatible with SPI, QSPI, MICROWIRE, and most DSP interface standards. In addition, a serial data out (SDO) pin allows daisy-chaining when multiple packages are used. Data readback allows the user to read the contents of the DAC register via the SDO pin. On power-up, the internal shift register and latches are filled with 0s, and the DAC outputs are at zero scale. The AD5429/AD5439/AD5449 DACs are available in 16-lead TSSOP packages.

Applications

• Portable battery-powered applications
• Waveform generators
• Analog processing
• Instrumentation applications
• Programmable amplifiers and attenuators
• Digitally controlled calibration
• Programmable filters and oscillators
• Composite video
• Ultrasound
• Gain, offset, and voltage trimming

Key features

• 10 MHz multiplying bandwidth
• INL of ±0.25 LSB at 8 bits
• 16-lead TSSOP package
• 2.5 V to 5.5 V supply operation
• ±10 μ reference input
• 50 MHz serial interface
• 2.47 MSPS update rate
• Extended temperature range: -40°C to +125°C
• 4-quadrant multiplication
• Power-on reset
• 0.5 μ typical current consumption
• Guaranteed monotonic
• Daisy-chain mode
• Readback function