AD7118*

Features:

Dynamic Range 85.5 dB
Resolution 1.5 dB
Full 625 V Input Range Multiplying DAC
Full Military Temperature Range 558C to +1258C
Low Distortion
Low Power Consumption
Latch Proof Operation (Schottky Diodes Not Required)
Single 5 V to 15 V Supply


Application

Digitally Controlled AGC Systems
Audio Attenuators
Wide Dynamic Range A/D Converters
Sonar Systems
Function Generators


Pinout




Specifications

V_DD (to DGND)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +17 V
V_IN (to AGND)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 V
Digital Input Voltage to DGND  . . . . .   0.3 V to V_DD + 0.3 V
I_OUT to AGND . . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to V_DD
AGND to DGND  . . . . . . . . . . . . . . . . . . . . . . . . . . .   0 to V_DD
DGND to AGND  . . . . . . . . . . . . . . . . . . . . . . . . . . .   0 to V_DD
Power Dissipation (Any Package)
To +75°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450 mW
Derates Above +75°C by  . . . . . . . . . . . . . . . . . . .6 mW/°C
Operating Temperature Range
Commercial (K, L Versions)  . . . . . . . . . . . . .   0°C to +70°C
Industrial (B, C Versions)  . . . . . . . . . . . . . 25°C to +85°C
Extended (T, U Versions)  . . . . . . . . . . . . 55°C to +125°C
Storage Temperature  . . . . . . . . . . . . . . .65°C to +150°C
Lead Temperature (Soldering, 10 sec)  . . . . . . . . . .+300°C


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 of AD7118 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 AD7118 is manufactured using an advanced monolithic silicon gate thin-film on CMOS process and is packaged in a 14-pin dual-in-line package.