AD7118_15 Datasheet, PDF (1/6 Pages) Analog Devices – CMOS Logarithmic D/A Converter

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LOGDAC
CMOS Logarithmic D/A Converter
AD7118*
FEATURES
FUNCTIONAL DIAGRAM
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
OBSOLETE 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
GENERAL DESCRIPTION
The LOGDAC^® AD7118 is a CMOS multiplying D/A con-
verter 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.
PIN CONFIGURATION
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
Temperature
Range
Specified
Accuracy
Range
Package
Option¹
AD7118KN
AD7118LN
AD7118BQ
AD7118CQ
AD7118TQ²
AD7118UQ²
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
0 to 42 dB
0 to 48 dB
0 to 42 dB
0 to 48 dB
0 to 42 dB
0 to 48 dB
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
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