Product Summary

The AD7885AQ is a 16-bit monolithic analog-to-digital converter with internal sample-and-hold and a conversion time of 5.3 ms. The maximum throughput rate is 166kSPS. It uses a two pass flash architecture to achieve this speed. Two input ranges are available: ±5 V and ±3 V. Conversion is initiated by the CONVST signal. The result can be read into a microprocessor using the CS and RD inputs on the device. The AD7885AQ has a 16-bit parallel reading structure while the AD7885AQ has a byte reading structure. The conversion result is in 2s complement code. The applications of the AD7885AQ include Automatic Test Equipment, Medical Instrumentation, Industrial Control, Data Acquisition Systems, and Robotics.

Parametrics

AD7885AQ absolute maximum ratings: (1)VDD to AGND :–0.3 V to +7 V; (2)AVDD to AGND:–0.3 V to +7 V; (3)VSS to AGND: +0.3 V to –7 V; (4)AVSS to AGND:–0.3 V to –7 V; (5)AGND Pins to DGND:–0.3 V to VDD + 0.3 V; (6)AVDD to VDD2: –0.3 V to +7 V; (7)AVSS to VSS2: +0.3 V to –7 V; (8)GND to DGND:–0.3 V to VDD + 0.3 V; (9)VINS, VINF to AGND: VSS –0.3 V to VDD + 0.3 V; (10)VREF+ to AGND: VSS –0.3 V to VDD + 0.3 V; (11)VREF– to AGND: VSS –0.3 V to VDD + 0.3 V; (12)VINV to AGND: VSS –0.3 V to VDD + 0.3 V; (13)Digital Inputs to DGND:–0.3 V to VDD + 0.3 V; (14)Digital Outputs to DGND: -0.3 V to VDD + 0.3 V; (15)Operating Temperature Range Commercial Plastic (A, B Versions):–40℃ to +85℃; (16)Industrial Cerdip (A, B Versions):–40℃ to +85℃; (17)Extended Cerdip (T Versions):–55℃ to +125℃; (18)Storage Temperature Range:–65℃ to +150℃; (19)Lead Temperature (Soldering, 10 secs): +300℃; (20)Power Dissipation (Any Package) to +75℃: 1000mW; (21)Derates above +75℃ by: 10 mW/℃.

Features

AD7885AQ features: (1)Monolithic Construction; (2)Fast Conversion: 5.3 ms; (3)High Throughput: 166kSPS; (4)Low Power: 250mW.

Diagrams

AD7885AQ block diagram

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