GENERAL DESCRIPTION

The LOGDAC® AD7118 is a CMOS multiplying D/A converter which attenuates an analog input signal over the range 0 to –85.5 dB in 1.5 dB steps. The analog output is determined by a six-bit attenuation code applied to the digital inputs. Operating frequency range of the device is from dc to several hundred kHz.

FEATURES

Dynamic Range 85.5 dB

Resolution 1.5 dB

Full ±25 V Input Range Multiplying DAC

Full Military Temperature Range –558°C to +1258°C

Low Distortion

Low Power Consumption

Latch Proof Operation (Schottky Diodes Not Required)

Single 5 V to 15 V Supply

APPLICATIONS

Digitally Controlled AGC Systems

Audio Attenuators

Wide Dynamic Range A/D Converters

Sonar Systems

Function Generators