Overview
The ADF4002BRUZ-RL from Analog Devices Inc. is a high-performance RF integrated circuit designed for frequency synthesis applications. This device is particularly suited for implementing local oscillators in the upconversion and downconversion sections of wireless receivers and transmitters. It features a low noise digital phase frequency detector (PFD), a precision charge pump, a programmable reference divider, and a programmable N divider. The ADF4002 can be used to create a complete phase-locked loop (PLL) when combined with an external loop filter and voltage-controlled oscillator (VCO).
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Temperature Range | −40 | +85 | °C | ||
| AVDD (Analog Supply Voltage) | 2.7 | 3.3 | 3.6 | V | |
| DVDD (Digital Supply Voltage) | 2.7 | 3.3 | 3.6 | V | |
| VP (Charge Pump Supply Voltage) | 2.7 | 5.5 | V | ||
| RF Input Frequency (RFIN) | 5 | 400 | MHz | For RFIN < 5 MHz, ensure slew rate (SR) > 4 V/µs | |
| REFIN Input Frequency | 20 | 300 | MHz | For REFIN < 20 MHz, ensure SR > 50 V/µs | |
| Phase Detector Frequency | 104 | MHz | ABP[2:1] = 00 (2.9 ns antibacklash pulse width) | ||
| Charge Pump Current (ICP) | 625 µA | 5 mA | RSET = 5.1 kΩ |
Key Features
- Low Noise Digital Phase Frequency Detector (PFD): Ensures high accuracy and stability in phase detection.
- Precision Charge Pump: Programmable charge pump currents with high and low value settings, and an absolute accuracy of 2.5%.
- Programmable Reference and N Dividers: 14-bit reference counter (R counter) and 13-bit N counter for flexible frequency synthesis.
- 3-Wire Serial Interface: Allows for easy programming and control of the device.
- Hardware and Software Power-Down Mode: Reduces power consumption when the device is not in use.
- Digital and Analog Lock Detect: Provides both digital and analog lock detect outputs for phase lock indication.
Applications
- Clock Conditioning: Used to generate stable clock signals in various systems.
- Clock Generation: Suitable for generating clocks in a wide range of frequencies.
- IF and LO Generation: Implemented in the upconversion and downconversion sections of wireless receivers and transmitters.
- Defense and Aerospace: The ADF4002-EP version is specifically designed to support defense and aerospace applications with an extended temperature range.
Q & A
- What is the operating temperature range of the ADF4002BRUZ-RL?
The operating temperature range is −40°C to +85°C.
- What are the supply voltage ranges for AVDD and DVDD?
Both AVDD and DVDD can operate from 2.7V to 3.6V).
- What is the frequency range for the RF input (RFIN)?
The RF input frequency range is from 5 MHz to 400 MHz).
- How does the digital lock detect work?
Digital lock detect is active high and is set based on the phase error on consecutive phase detector cycles. It can be configured to require either three or five consecutive cycles with phase errors less than 15 ns).
- What is the purpose of the 24-bit input shift register?
The 24-bit input shift register is used to clock in data that is then transferred to one of four latches based on control bits).
- Can the ADF4002 be used as a standalone PFD and charge pump?
Yes, by programming R and N to 1, the device can be used as a standalone PFD and charge pump).
- What is the maximum charge pump current?
The maximum charge pump current is 5 mA with an RSET of 5.1 kΩ).
- How does the device support power-down mode?
The device supports both hardware and software power-down modes to reduce power consumption when not in use).
- What are the typical applications of the ADF4002?
The ADF4002 is typically used in clock conditioning, clock generation, and IF/LO generation in wireless receivers and transmitters).
- Is there a version of the ADF4002 specifically for defense and aerospace applications?
Yes, the ADF4002-EP version is designed to support defense and aerospace applications with an extended temperature range and other enhanced features).
