AD9901KP

Overview

The AD9901KP is a digital phase/frequency discriminator from Analog Devices, packaged in a 20-lead Plastic Leaded Chip Carrier (PLCC). It operates on a single +5 V supply for TTL/CMOS compatibility or a –5.2 V supply for ECL inputs. The device compares phase and frequency inputs up to 200 MHz using a trench-oxide isolated process. Key electrical characteristics include a linear phase detection range of 360 degrees at 40 kHz and 270 degrees at 70 MHz. Supply current is typically 54.0 mA at +25 °C with a nominal power dissipation of 218 mW. The operating temperature range for the commercial KP variant is 0 °C to +70 °C.

Feature Summary

• Digital phase and frequency detection with no indeterminate "dead zone".
• Compatible with ECL, TTL, and CMOS logic levels via configurable supply voltage.
• Open-collector outputs allow adjustable output swing to match post-filtering requirements.
• Linear transfer function maintained across frequencies up to 200 MHz.

Applications

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

Procurement Notes

Verify the package type matches the 20-lead PLCC specification for the AD9901KP suffix. Confirm the temperature grade corresponds to the commercial range (0 °C to +70 °C), as military versions use different suffixes. Check RoHS compliance status if required by the specific manufacturing environment. Ensure sourcing channels provide valid traceability documentation for this component.

Selection Notes

Select the AD9901KP when a digital solution is preferred over analog mixers to eliminate excessive phase uncertainty. Choose this model for applications requiring direct comparison of standard IF frequencies without prescalers. Consider the open-collector output flexibility for matching specific load impedances. Verify that the input signal levels align with either the +5 V TTL/CMOS or –5.2 V ECL configuration requirements.

Part Context

The AD9901 series includes variants such as the AD9901KQ (14-lead Cerdip) and military-compliant versions like the AD9901TQ/883. The KP suffix specifically denotes the 20-lead Plastic Leaded Chip Carrier package for commercial temperature operation. This component belongs to a family of high-speed phase detectors designed for robust performance in demanding RF environments.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult Analog Devices for current equivalent recommendations or verify pin-to-pin compatibility with other digital phase discriminators if cross-referencing is necessary.