FEATURES
Dynamic Range: 88.5 dB Resolution: 0.375 dB On-Chip Data Latches +5 V Operation AD7111A Pin Compatible with AD7524 Low Power APPLICATIONS
Audio Attenuators Sonar Systems Function Generators Digitally Controlled AGC System LC2MOS LOGDAC Logarithmic D/A Converter AD7111/AD7111A FUNCTIONAL BLOCK DIAGRAMS VDD VIN R FB AD7111 17-BIT DAC I OUT AGND 17-BIT LATCH DECODE LOGIC The LOGDAC® AD7111/AD7111A are monolithic multiplying D/A converters featuring wide dynamic range in a small package. Both DACs can attenuate an analog input signal over the range 0 dB to 88.5 dB in 0.375 dB steps. They are available in 16-pin DIPs and SOIC packages. The very fine step resolution, which is available over the entire dynamic range, is due to the use of this 17-bit DAC. The AD7111/AD7111A are easily interfaced to a standard 8-bit MPU bus via an 8-bit data port and standard microprocessor control lines. The AD7111 WR input is edge triggered and requires a rising edge to load new data to the DAC. The AD7111A WR is level triggered to allow transparent operation of the latches, if required.
Analog Devices
