Overview
The ADF4208BRUZ-R7 from Analog Devices Inc. is a dual RF PLL (Phase-Locked Loop) frequency synthesizer designed for high-performance RF applications. This integrated circuit is part of the ADF4206/ADF4208 family and is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP). It operates over a wide temperature range of -40°C to +85°C, making it suitable for various industrial environments.
The device features a precision charge pump, programmable reference divider, and programmable A and B counters, along with a dual modulus prescaler. These components enable the implementation of a complete phase-locked loop when used with external loop filters and voltage-controlled oscillators (VCOs). The ADF4208BRUZ-R7 is controlled via a simple 3-wire interface and supports power supply voltages ranging from 2.7 V to 5.5 V.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 20-Lead TSSOP |
| Operating Temperature Range | -40°C to +85°C |
| Power Supply Voltage | 2.7 V to 5.5 V |
| Maximum Operating Frequency | Up to 2 GHz |
| Reference Counter Bits | 14-bit |
| A Counter Bits | 6-bit |
| B Counter Bits | 11-bit |
| Phase Noise (typical) | -91 dBc/Hz @ 1750 MHz, -91 dBc/Hz @ 900 MHz |
| Spurious Signals (typical) | -80 dBc @ 200 kHz offset, -84 dBc @ 400 kHz offset |
| Thermal Impedance (θJA) | 112°C/W (TSSOP), 30.4°C/W (LFCSP with paddle soldered) |
Key Features
- Precision charge pump and programmable reference divider
- Programmable A and B counters with dual modulus prescaler (P/P + 1)
- On-chip oscillator circuitry supporting crystal oscillators
- Simple 3-wire interface for control of all on-chip registers
- Power-down mode when not in use
- High performance phase noise characteristics
- Low spurious signal levels
Applications
- Wireless communication systems (e.g., cellular, satellite, and microwave links)
- RF transceivers and receivers
- Base stations and repeaters
- Test and measurement equipment
- Industrial and medical RF applications
Q & A
- What is the operating temperature range of the ADF4208BRUZ-R7?
The operating temperature range is -40°C to +85°C.
- What is the maximum operating frequency of the ADF4208BRUZ-R7?
The maximum operating frequency is up to 2 GHz.
- What type of package does the ADF4208BRUZ-R7 come in?
The device is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP).
- What are the key components of the ADF4208BRUZ-R7?
The key components include a precision charge pump, programmable reference divider, programmable A and B counters, and a dual modulus prescaler.
- How is the ADF4208BRUZ-R7 controlled?
The device is controlled via a simple 3-wire interface.
- What are the typical phase noise values for the ADF4208BRUZ-R7?
The typical phase noise values are -91 dBc/Hz @ 1750 MHz and -91 dBc/Hz @ 900 MHz.
- What are the spurious signal levels for the ADF4208BRUZ-R7?
The spurious signal levels are typically -80 dBc @ 200 kHz offset and -84 dBc @ 400 kHz offset.
- Can the ADF4208BRUZ-R7 be powered down when not in use?
Yes, the device can be powered down when not in use.
- What are some common applications of the ADF4208BRUZ-R7?
Common applications include wireless communication systems, RF transceivers and receivers, base stations, test and measurement equipment, and industrial and medical RF applications.
- What is the thermal impedance of the ADF4208BRUZ-R7 in TSSOP and LFCSP packages?
The thermal impedance is 112°C/W for TSSOP and 30.4°C/W for LFCSP with the paddle soldered.
