AD5446

Data Sheet AD5444/AD5446 12-/14-Bit High Bandwidth Multiplying DACs with Serial Interface FEATURES ► 12 MHz multiplying bandwidth ► INL of ±0.5 LSB at 12 bits ► Pin-compatible 12-/14-bit current output DAC ► 2.5 V to 5.5 V supply operation ► 10-lead MSOP package ► ±10 V reference input ► 50 MHz serial interface ► 2.7 MSPS update rate ► Extended temperature range: −40°C to +125°C ► 4-quadrant multiplication ► Power-on reset with brownout detection ► 0.4 µA typical current consumption ► Guaranteed monotonic 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 GENERAL DESCRIPTION The AD5444/AD54461 are CMOS 12-bit and 14-bit, current output, digital-to-analog converters (DACs). Operating from a single 2.5 V to 5.5 V 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 12 MHz. 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. FUNCTIONAL BLOCK DIAGRAM Figure 1. The a...