Overview
The AD9901KPZ-REEL, produced by Analog Devices Inc., is a digital phase/frequency discriminator designed for high-speed applications. This integrated circuit is capable of directly comparing phase/frequency inputs up to 200 MHz, making it suitable for various high-frequency signal processing tasks. The AD9901 operates on a single +5 V supply and can be configured to work with TTL, CMOS, or ECL logic levels, enhancing its versatility in different system designs. Its innovative design ensures a linear detection range without the indeterminate phase detection zones common in other digital designs.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Positive Supply Voltage (+VS for TTL Operation) | - | - | +7 | V |
| Negative Supply Voltage (–VS for ECL Operation) | - | - | –7 | V |
| Input Voltage Range (TTL Operation) | 0 | - | +5.5 | V |
| Differential Input Voltage (ECL Operation) | - | - | 4.0 | V |
| ISET Current | - | - | 12 | mA |
| Output Current | - | - | 30 | mA |
| TTL Input Logic '1' Voltage | 2.0 | - | - | V |
| TTL Input Logic '0' Voltage | - | - | 0.8 | V |
| ECL Differential Switching Voltage | - | - | 300 mV | - |
| Peak-to-Peak Output Voltage Swing (TTL) | 1.6 | 1.8 | 2.0 | V |
| Internal Reference Voltage | 0.42 | 0.47 | 0.52 | V |
Key Features
- Phase and Frequency Detection: Capable of directly comparing phase/frequency inputs up to 200 MHz.
- ECL/TTL/CMOS Compatibility: Operates with TTL, CMOS, or ECL logic levels.
- Linear Transfer Function: Ensures a linear detection range without indeterminate phase detection zones.
- No “Dead Zone”: Eliminates excessive phase uncertainty common in standard PLL configurations.
- MIL-STD-883 Compliant Versions Available: Available in both commercial and military temperature ranges.
- Flexible Power Management: Allows reduction in power consumption when operated at lower frequencies.
Applications
- Low Phase Noise Reference Loops: Ideal for applications requiring high phase stability.
- Fast-Tuning “Agile” IF Loops: Suitable for fast-tuning intermediate frequency loops.
- Secure “Hopping” Communications: Used in secure communication systems that require frequency hopping.
- Coherent Radar Transmitter/Receiver Chains: Applicable in coherent radar systems for precise phase and frequency control.
Q & A
- What is the maximum frequency that the AD9901 can handle?
The AD9901 can handle phase/frequency inputs up to 200 MHz.
- What are the compatible logic levels for the AD9901?
The AD9901 is compatible with TTL, CMOS, and ECL logic levels.
- Does the AD9901 have a “dead zone” in its detection range?
No, the AD9901 does not have a “dead zone” in its detection range.
- What are the temperature ranges for the AD9901?
The AD9901 is available in both commercial (0°C to +70°C) and military (–55°C to +125°C) temperature ranges.
- How does the AD9901 manage power consumption at lower frequencies?
The AD9901 allows for a reduction in power consumption when operated at lower frequencies through a simple current setting resistor.
- What are some typical applications of the AD9901?
Typical applications include low phase noise reference loops, fast-tuning “agile” IF loops, secure “hopping” communications, and coherent radar transmitter/receiver chains.
- What is the maximum output current of the AD9901?
The maximum output current of the AD9901 is 30 mA.
- How is the output stage current range controlled in the AD9901?
The output stage current range is controlled by a simple current setting resistor (RSET).
- Is the AD9901 compliant with MIL-STD-883?
Yes, the AD9901 has versions that are compliant with MIL-STD-883.
- What is the typical internal reference voltage of the AD9901?
The typical internal reference voltage of the AD9901 is 0.47 V.
