AD9901KQ - 200MHz Phase/Frequency Discriminator | Analog Devices
MPN: AD9901KQ ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
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AD9901KQ Overview
A digital phase/frequency discriminator is a timing IC that compares two periodic signals and produces an error indication representing their relative phase and frequency. Within the broader hierarchy of clock and timing integrated circuits, it combines input frequency comparison with phase-error generation. Unlike simple binary phase comparators, the AD9901 is designed to avoid the indeterminate detection zones associated with many digital phase-detection implementations.
The AD9901 uses a high-speed trench-oxide isolated process to compare inputs directly to 200 MHz. According to the manufacturer datasheet, its innovative architecture provides a linear detection range, making it useful in closed-loop clocking, phase-locked-loop error paths, frequency-discriminator instrumentation, and laboratory signal-chain designs. The commercial AD9901 family is also offered in a 20-pin PLCC package, while the AD9901KQ specifically uses the 14-pin ceramic DIP.
Typical uses include comparing a reference oscillator against a signal under test, generating phase-error voltage for servo loops, evaluating frequency drift, and supporting clock-distribution alignment. In these systems, the discriminator can operate directly at the stated 200 MHz input limit, reducing the need for external prescaling when signals remain within range.
One key design consideration is that available verified data identifies the function, maximum input frequency, package, and commercial or military product options, but does not provide a complete electrical table, individual pin map, supply-voltage range, or output characteristics. Those values should therefore be confirmed in the manufacturer datasheet before final circuit implementation. Ceramic-DIP construction and the absence of verified lead-free or environmental declarations should also be considered during lifecycle planning.
This page combines the verified manufacturer and distributor information for AD9901KQ with application guidance, comparison parameters, and engineering-oriented cautions. It is intended to help engineers identify the correct function, package, operating class, and sourcing path without presenting unsupported electrical claims.
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Request AlternativesAD9901KQ Specifications
| Device Type | Digital phase/frequency discriminator IC |
| Maximum Comparison Input Frequency | 200 MHz |
| Number of Discriminator Channels | 1 |
| Package Type | 14-CDIP ceramic DIP |
| Package Width | 0.300 inch (7.62 mm) |
| Pin Count | 14 pins |
| Process Technology | High-speed trench-oxide isolated process |
| Input Function | Direct phase/frequency comparison |
| Detection Behavior | Linear detection range without indeterminate phase-detection zones common to other digital designs |
| Commercial Package Options | 14-pin ceramic DIP and 20-pin PLCC |
| Military Version Availability | Available in versions compliant with MIL-STD-883 |
| Mounting Type | Through-hole |
| Supplier Packaging | Tube |
AD9901KQ 14-pin ceramic dip and 20-pin plcc Pin Configuration Guide
Pin configuration for AD9901KQ (14-pin ceramic dip and 20-pin plcc package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for AD9901KQ.
Refer to the datasheet for full pin configuration.
Typical Applications
AD9901KQ is suitable for 6 applications: High-Speed Frequency Comparison, Phase-Locked-Loop Error Detection, Clock Alignment and Skew Measurement, Frequency-Drift Test Instrumentation, Telecommunications Clock Recovery, Radar and RF System Timing.
High-Speed Frequency Comparison
The AD9901KQ is suited to comparing two periodic signals when the required comparison frequency reaches 200 MHz and the designer wants direct comparison without an external prescaler. Its one-channel digital phase/frequency-discriminator architecture and verified linear detection range make it useful in laboratory and production-test systems that must determine frequency offset or phase error between related signals. The ceramic 14-CDIP package supports through-hole assembly and prototype accessibility. Before implementation, verify the input thresholds, output characteristics, supply voltage, and timing limits from the complete manufacturer datasheet, because those values were not exposed in the supplied search results.
Recommended
Phase-Locked-Loop Error Detection
The AD9901KQ can serve as the phase and frequency error detector in a high-speed clocking architecture because it directly compares inputs up to 200 MHz and offers a linear detection range. Such a detector is useful where a PLL or delay-based servo loop requires a continuously meaningful error signal rather than the discontinuous zones associated with some digital phase detectors. The AD9901KQ is appropriate where a 14-CDIP implementation is acceptable and through-hole serviceability is valuable. The precise error-output transfer, polarity, and loop-gain relationship must be taken from the manufacturer data before choosing component values or loop bandwidth.
Recommended
Clock Alignment and Skew Measurement
The AD9901KQ can compare a reference clock with a propagated or delayed clock to support alignment and skew measurement. Its verified 200 MHz direct-comparison capability makes it relevant to communication-clock and instrumentation systems where phase error must be evaluated rapidly, while the stated linear detection range helps avoid undefined digital phase zones. The 14-CDIP footprint favors laboratory instruments and higher-reliability through-hole assemblies rather than compact production electronics. Designers should confirm output swing, settling behavior, temperature range, and permissible input duty cycle because the supplied verified data does not specify those electrical limits.
Recommended
Frequency-Drift Test Instrumentation
The AD9901KQ fits bench and automated test equipment intended to reveal phase and frequency drift between a reference and a device under test. Direct comparison up to 200 MHz allows the instrument to retain the native signal rate when no prescaling is desired, while the linear detection range provides a more useful error representation than many basic digital phase detectors. Its through-hole ceramic DIP package also simplifies socketed laboratory use. A practical implementation still requires a known-good reference source, suitable coupling or termination, and output-amplifier design based on the manufacturer's specified characteristics.
Recommended
Telecommunications Clock Recovery
The AD9901KQ can support phase and frequency error detection in telecommunications equipment that uses clock-recovery or synchronization feedback paths. Its one-channel format is appropriate for comparing a recovered signal with a reference, and its direct 200 MHz comparison capability avoids adding a prescaler in designs operating at or below that limit. The through-hole ceramic DIP package is less compact than modern surface-mount clock ICs but can be useful in specialized, serviceable, or legacy-style instrumentation. Signal conditioning, input logic thresholds, supply requirements, and loop stability must be verified from the full AD9901 documentation before production deployment.
Recommended
Radar and RF System Timing
The AD9901KQ can be evaluated for phase-comparison tasks in radar, RF instrumentation, and coherent test systems where periodic signals must be related to a local reference. Its verified direct input capability extends to 200 MHz, allowing it to compare low-IF or baseband timing signals without prescaling, and its linear detection range avoids the undefined regions described for many digital detectors. The 14-CDIP package is practical for laboratory prototypes and modular instrument construction. Engineers should verify allowable input amplitude, duty-cycle limits, propagation delay, and output timing directly from the datasheet before implementing an RF front end.
Recommended
Recommended Products Summary
Engineering reference data for AD9901KQ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Device Function | Digital phase/frequency discriminator |
| Maximum Comparison Input Frequency | 200 MHz |
| Discriminator Channels | 1 |
| Package | 14-CDIP ceramic DIP (0.300 inch, 7.62 mm) |
| Brand | Analog Devices |
| Mounting Type | Through-hole |
| Process Technology | High-speed trench-oxide isolated process |
| Detection Behavior | Linear detection range without indeterminate phase-detection zones common to other digital designs |
| Commercial Package Family Options | 14-pin ceramic DIP and 20-pin PLCC |
| Military Availability | Versions compliant with MIL-STD-883 are offered |
| Supplier Packaging | Tube |
Design Notes
Do not assume that a generic phase detector, a PLL multiplier, or another AD9901 package variant is a direct replacement. The AD9901KQ is a specific 14-CDIP ordering configuration, and the supplied data does not expose its complete pin map. Before PCB assembly, verify every pin against the official Analog Devices datasheet, including supply, ground, reference-input, and error-output assignments.
Preserve the quality of the two periodic signals being compared. Use controlled impedance, short return paths, and clean grounding because discontinuities or unequal rise and fall times can alter measured phase error even when both signals remain below 200 MHz. Confirm the allowed input logic levels, slew behavior, duty-cycle range, and loading in the full manufacturer datasheet before selecting termination or coupling components.
Treat the 14-CDIP as a through-hole ceramic component with a 7.62 mm row width. Provide adequate hole tolerances and mechanical support, especially in vibration-prone equipment, and avoid excessive insertion stress on the ceramic body. A socket can simplify replacement and prototype interchange, but its contact resistance and pin capacitance should be included in high-speed signal-integrity reviews.
The verified snippets do not state the AD9901KQ supply-voltage range, quiescent current, or output loading. Do not infer those values from other AD9901 package variants. Build the supply from the complete manufacturer specification, include decoupling appropriate to that specification, and verify absolute maximum ratings—especially because this is a 200 MHz-capable timing device where lead and ground-return inductance can affect internal behavior.
Compliance Information
The supplied data states that MIL-STD-883-compliant versions of the AD9901 are available, but it does not explicitly tie that qualification to the AD9901KQ ordering code. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not provided.
