The MAX5742AUB+ is a 12bit, low power, quad, buffered voltage output digital to analogue converter (DAC) with serial interface in 10 pin μMAX package. The wide supply voltage range of 2.7V to 5.5V, supply current of 229μA (VDD = 3.6V) and 271μA (VDD = 5.5V) accommodates low power and low voltage applications. In power-down mode reference input is high impedance which further reduces system's total power consumption. The 20MHz, 3-wire SPI, QSPI, MICROWIRE and DSP compatible serial interface saves board space and reduces the complexity of opto and transformer isolated applications. The MAX5742 on-chip power-on reset circuit resets the DAC outputs to zero and loads the output with 100Kohm resistor to ground. This provides additional safety for applications that drive valves or other transducers that need to be off on power-up. It is used in automatic tuning gain and offset adjustment, power amplifier control, battery powered instruments and VCO control.
- Reference input accepts voltage range from 0 to VDD
- Automotive temperature range from -40°C to 125°C
- Power-down supply current of 0.29μA
- Power supply rejection ratio of 58.8dB and voltage output slew rate of 0.5V/μs
- 12bit monotonicity, ±1LSB differential nonlinearity error and ±2LSB integral nonlinearity error
- Safe power-up reset to zero volts at DAC output
- Three software selectable power-down impedances (100Kohm, 1Kohm, hi-Z)
- Rail to rail output buffer amplifiers
- Schmitt triggered logic inputs for direct interfacing to optocouplers
- Zero code error of 0.4% of FS and gain error of ±3% of FS
信号处理, 自动化与过程控制
(EN)
