AD2S44-TM11B

Overview

The AD2S44-TM11B is a dual-channel, 14-bit synchro/resolver-to-digital converter housed in a 32-lead bottom-brazed ceramic DIP hybrid package. It provides independent tracking for two channels with ±4.0 arc minute accuracy over the −55°C to +125°C temperature range. The device utilizes a ratiometric conversion technique for noise immunity and supports signal frequencies from 400 Hz to 2.6 kHz. Key features include built-in test capabilities, high tracking rates of 20 rev/sec, and three-state parallel digital outputs. Power consumption is approximately 1.9 W under quiescent conditions with ±15 V supplies.

Feature Summary

• Dual-channel architecture with independent Type II servo loop tracking converters
• 14-bit resolution with ±4.0 arc minute accuracy across the full military temperature range
• Built-in test (BIT) facility for fault detection and failsafe system integration
• Independent reference inputs allowing different frequencies per channel

Applications

• Gimbal and gyro control systems
• Military servo control systems
• Avionic systems
• CNC machine tooling
• Fire control systems

Procurement Notes

Verify that the ordering suffix matches the required signal voltage, reference voltage, and accuracy grade. The TM11B designation indicates specific electrical parameters including 90 V signal and 115 V reference synchro format inputs. Confirm the B suffix denotes high-reliability processing standards if required for the application environment.

Selection Notes

Select this component when space, weight, and cost are critical constraints requiring dual-channel conversion. Ensure the application operates within the 400 Hz to 2.6 kHz reference frequency range. Verify that the ±15 V power supply rails are available and that the 32-lead hybrid package footprint fits the mechanical design. Consider the acceleration constant of 62,000 sec⁻² for dynamic performance requirements.

Part Context

The AD2S44 series consists of low-cost, high-reliability hybrid converters designed for demanding environments. The TM11B variant specifically addresses applications needing 90 V signal and 115 V reference inputs with standard military temperature coverage. It complements other Analog Devices products like the monolithic AD2S80A series and the isolated SDC/RDC1740 series.

Replacement Considerations

Public confirmed substitute part numbers: None.