AD7118

a FEATURES Dynamic Range 85.5 dB Resolution 1.5 dB Full ؎25 V Input Range Multiplying DAC Full Military Temperature Range –55؇ C to +125؇ 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 LOGDAC CMOS Logarithmic D/A Converter AD7118* FUNCTIONAL DIAGRAM PIN CONFIGURATION 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. The device is manufactured using an advanced monolithic silicon gate thin-film on CMOS process and is packaged in a 14-pin dual-in-line package. ORDERING INFORMATION Model AD7118KN AD7118LN AD7118BQ AD7118CQ AD7118TQ2 AD7118UQ2 Temperature Range 0°C to +70°C 0°C to +70°C –25°C to +85°C –25°C to +85°C –55°C to +125°C –55°C to +125°C Specified Accuracy Range 0 to 42 dB 0 to 48 dB 0 to 42 dB 0 to 48 dB 0 to 42 dB 0 to 48 dB Package Option1 N-16 N-16 Q-16 Q-16 Q-16 Q-16 NOTES 1 N = Plastic DIP; Q = Cerdip. 2 To order MIL-STD-883, Class B processed parts, add /883B to part number. *Protected by U.S. Patent No. 4521,764. LOGDAC is a registered trademark of Analog Devices, Inc. REV. A In...