Overview
The ADF4111BRU-REEL7 is a RF PLL Frequency Synthesizer manufactured by Analog Devices Inc. This device is part of the ADF411x family, designed to implement local oscillators (LO) 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, programmable reference divider, and programmable A and B counters, along with a dual-modulus prescaler. The synthesizer operates with a power supply ranging from 2.7 V to 5.5 V and can be powered down when not in use.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Power Supply Range | 2.7 V to 5.5 V | V | |
| Operating Temperature Range | −40°C to +85°C (B Version) | °C | Industrial grade |
| Reference Input Frequency | 5 to 100 MHz | MHz | For f < 5 MHz, ensure SR > 30 V/μs |
| RF Input Frequency | 0.08 to 1.2 GHz | GHz | For lower frequencies, ensure slew rate (SR) > 30 V/μs |
| Dual-Modulus Prescaler | 32/33 | ||
| A and B Counters | A: 5-bit, B: 13-bit | ||
| Reference Counter (R Counter) | 14-bit | ||
| Interface | 3-wire serial interface | ||
| Maximum Prescaler Output Frequency | 165 MHz (AVDD, DVDD = 3 V), 200 MHz (AVDD, DVDD = 5 V) | MHz |
Key Features
- Low noise digital phase frequency detector (PFD) and precision charge pump.
- Programmable reference divider, A and B counters, and dual-modulus prescaler.
- 3-wire serial interface for control of all on-chip registers.
- Power-down mode to conserve power when not in use.
- Fastlock mode for quick locking time.
- Digital lock detect feature.
- Extended tuning voltage capability in 3 V systems with separate VP pin.
Applications
- Base stations for wireless radio (GSM, PCS, DCS, CDMA, WCDMA).
- Wireless handsets (GSM, PCS, DCS, CDMA, WCDMA).
- Wireless LANs.
- Communications test equipment.
- CATV equipment.
Q & A
- What is the power supply range of the ADF4111BRU-REEL7?
The power supply range is from 2.7 V to 5.5 V.
- What is the operating temperature range for the B Version of the ADF4111BRU-REEL7?
The operating temperature range is −40°C to +85°C.
- What is the maximum RF input frequency for the ADF4111BRU-REEL7?
The maximum RF input frequency is 1.2 GHz.
- What type of interface does the ADF4111BRU-REEL7 use for control?
The device uses a 3-wire serial interface.
- Does the ADF4111BRU-REEL7 have a power-down mode?
- What is the purpose of the dual-modulus prescaler in the ADF4111BRU-REEL7?
The dual-modulus prescaler (32/33) is used in conjunction with the A and B counters to implement the N divider.
- What are some of the key applications of the ADF4111BRU-REEL7?
Key applications include base stations, wireless handsets, wireless LANs, communications test equipment, and CATV equipment.
- How does the ADF4111BRU-REEL7 implement a complete phase-locked loop (PLL)?
A complete PLL can be implemented by using the synthesizer with an external loop filter and voltage controlled oscillator (VCO).
- What is the significance of the Fastlock mode in the ADF4111BRU-REEL7?
The Fastlock mode allows for quick locking time, which is beneficial in applications requiring fast frequency switching.
- What is the maximum allowable prescaler output frequency for the ADF4111BRU-REEL7?
The maximum allowable prescaler output frequency is 165 MHz for AVDD, DVDD = 3 V and 200 MHz for AVDD, DVDD = 5 V.
