AD2S44:Low Cost, 14-Bit, Dual Channel Synchro/Resolver-to-Digital Converter

AD2S44: Low Cost, 14-Bit, Dual Channel Synchro/Resolver-to-Digital Converter

The AD2S44 is a 14-bit dual channel, continuous tracking synchro/ resolver-to-digital converter. It has been designed specifically for applications where space, weight, and cost are at a premium. Each 32-lead hybrid device contains two independent Type II servo loop tracking converters. The ratiometric conversion technique employed provides excellent noise immunity and tolerance of long lead lengths.

The core of each conversion is performed by state-of-the-art mono-lithic, integrated circuits manufactured by the Analog Devices, Inc., proprietary BiMOS II process, which combines the advantages of low power CMOS digital logic with bipolar linear circuits. The use of these ICs keeps the internal component count low and ensures high reliability.

The built-in test (BIT) facility can be used in failsafe systems to provide an indication of whether the converter is tracking accurately.

Each channel incorporates a high accuracy differential condi-tioning circuit for signal inputs providing more than 74 dB of common-mode rejection. Options are available for both synchro and resolver format inputs. The converter output is via a three-state transparent latch allowing data to be read without interruption of the converter operation. The A/B and OE control lines select the channel and present the digital position to the common data outputs.

The AD2S44 also features independent reference inputs where different reference frequencies can be used for each channel.

All components are 100% tested at −55°C, +25°C, and +125°C. Devices are processed to high reliability screening standards and receive further levels of testing and screening to ensure high levels of reliability.

AD2S44 特点

Low per-channel cost
32-lead DIL hybrid package
2.6 arc minute accuracy
14-bit resolution
Built-in test
Independent reference inputs
High tracking rate

AD2S44 功能框图

AD2S44 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD2S44-TM11B	量产	32 ld BB Hybrid DIP (43.89mm)	32	军用
AD2S44-TM12B	量产	32 ld BB Hybrid DIP (43.89mm)	32	军用
AD2S44-TM18B	量产	32 ld BB Hybrid DIP (43.89mm)	32	军用
AD2S44-UM18B	量产	32 ld BB Hybrid DIP (43.89mm)	32	军用