The AD7396/AD7397 series are dual-channel, pin-compatible 12/10-bit output digital-to-analog converters that are power-saving and operate from a +3 V to +5 V supply. The high input impedance reference input has a unique feature that connects the VREF to the VDD, thus establishing a full DAC output swing from 0 to VDD. With a guaranteed operating voltage range of +2.7 V to +5.5 V, these devices are ideal for battery-powered applications.
With a 12-bit latch with a write time of 45 ns, it is possible to interface with fast processors without waiting. The dual-buffer input structure allows the input registers to be preloaded with data one at a time, and then a load strobe connected to the LDA+LDB input updates both DAC outputs at the same time. In addition, the asynchronous RS input can set the output to zero level when powered on or requested by the user. The shutdown mode is controlled directly by the active/low-level active/SHDN pin, where power consumption drops to sub-microamps. In the shutdown state, register data can be changed even if the output buffer is open. When returning to normal operation, the output voltage will be determined by the latest data loaded into the DAC register.
Both devices feature the same pinout, allowing users to select the appropriate resolution for their specific application without having to change the board. Key applications for the AD7396/AD7397 include: automotive sensor voltage generation and calibration, portable communications, PC peripherals, and digital control calibration.
The AD7396/AD7397 are rated for a temperature range of -40°C to +85°C industrial temperatures. AD7397AN/AD7397AR is rated for a temperature range of -40°C to +125°C for automotive applications. The AD7396s and AD7397s are available in both plastic DIP and 24-pin SOIC packages. AD7397ARU is available in a 1.1 mm, ultra-thin TSSOP-24 package for ultra-compact applications such as PCMCIA cards.
Both the AD7396 and AD7397 are micropower, single/dual/quad digital-to-analog converters (AD7390 ... AD7398) series, which adopts a serial or parallel data loading structure.