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FEATURES
Dynamic Range: 88.5 dB
Resolution: 0.375 dB
On-Chip Data Latches
+5 V Operation
AD7111A Pin Compatible with AD7524
Low Power LC2MOS LOGDAC
Logarithmic D/A Converter
AD7111/AD7111A
FUNCTIONAL BLOCK DIAGRAMS
VDD VIN R FB AD7111 I OUT
17-BIT DAC
AGND APPLICATIONS
Audio Attenuators
Sonar Systems
Function Generators
Digitally Controlled AGC System GENERAL DESCRIPTION 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 AD7111 is also available
in a 20-terminal LCCC package.
The degree of attenuation across the DAC is determined by an …