AD9901TQ/883B

Overview

The AD9901TQ/883B is a military-grade digital phase/frequency discriminator from Analog Devices, compliant with MIL-STD-883. It operates within a temperature range of –55°C to +125°C and is housed in a 14-lead ceramic DIP package (Q-14). The device directly compares phase and frequency inputs up to 200 MHz using a high-speed trench-oxide isolated process. It features a linear transfer function without indeterminate detection zones. Electrical operation supports TTL/CMOS logic with a single +5 V supply or ECL inputs with a –5.2 V supply. Open-collector outputs allow configurable swing matching for post-filtering requirements.

Feature Summary

• MIL-STD-883 compliant version with extended military temperature range (–55°C to +125°C)
• Ultrahigh speed phase/frequency discrimination up to 200 MHz
• Linear transfer function free of dead zones common in other digital designs
• Configurable for TTL, CMOS, or ECL logic levels via supply voltage selection

Applications

• Low phase noise reference loops
• Fast-tuning agile intermediate frequency (IF) loops
• Secure hopping communications systems
• Coherent radar transmitter and receiver chains

Procurement Notes

Verify the specific revision level and lot traceability documentation required for MIL-STD-883 compliance when sourcing this component. Confirm that the 14-lead ceramic DIP packaging meets the mechanical specifications for the target application environment. Ensure supply chain sources provide appropriate certification for military-grade parts.

Selection Notes

Select the AD9901TQ/883B when military qualification and wide temperature operation are mandatory. Choose this model over commercial variants if the application requires operation below 0°C or above +70°C. Ensure the system design accommodates the specific power supply requirements (+5 V for TTL/CMOS or –5.2 V for ECL) and the open-collector output configuration.

Part Context

This part belongs to the AD9901 family of digital phase/frequency discriminators. The 'TQ' suffix indicates the 14-lead ceramic DIP package, while '/883B' denotes compliance with MIL-STD-883 standards. It serves as a core component in phase-locked loop (PLL) architectures, replacing traditional analog mixers or standard digital detectors to improve locking speed and phase stability.

Replacement Considerations

Direct replacements must be MIL-STD-883 qualified versions of the AD9901. Commercial equivalents like the AD9901KQ lack the required temperature range and military certification. Cross-referencing should focus on pin-compatible digital phase detectors with similar input frequency limits and linear detection characteristics.