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MAX2871
23.5MHz to 6000MHz Fractional/Integer-N Synthesizer/VCO
High-Performance, Wide-Frequency PLL with Integrated VCOs Simplifies Signal Chain and Improves Performance
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Key Features
Applications/Uses
Parametric specs for PLLs/PLLs with Integrated VCO
| Synthesizer Mode | Fractional Integer |
| VSUPPLY (V) | 3.0 to 3.6 |
| Oper. Freq. (MHz) (min) | 23.5 |
| Oper. Freq. (MHz) (max) | 6000 |
| Prog. POUT (dBm) | -4 to +5 |
| Differential RF Outputs | 2 |
| Inband Noise Floor (dBc/Hz) | -229 |
| RMS Jitter (ps RMS) (typ) | 0.2 |
| Package/Pins | TQFN/32 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | 6.81 |
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Simplified Block Diagram
Technical Docs
Tutorial: All About Frequency Synthesis
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Parameters
Parametric specs for PLLs/PLLs with Integrated VCO
| Synthesizer Mode | Fractional Integer |
| VSUPPLY (V) | 3.0 to 3.6 |
| Oper. Freq. (MHz) (min) | 23.5 |
| Oper. Freq. (MHz) (max) | 6000 |
| Prog. POUT (dBm) | -4 to +5 |
| Differential RF Outputs | 2 |
| Inband Noise Floor (dBc/Hz) | -229 |
| RMS Jitter (ps RMS) (typ) | 0.2 |
| Package/Pins | TQFN/32 |
| Oper. Temp. (°C) | -40 to +85 |
| Budgetary Price (See Notes) | 6.81 |
Key Features
- Output Binary Buffers/Dividers Enable Extended Frequency Range
- Divider Ratios of 1/2/4/8/16/32/64/128
- 23.5MHz to 6000MHz
- High-Performance Phase Frequency Detector (PFD) and Reference Frequency Reduces Spectral Noise
- PFD Up to 140MHz
- Reference Frequency Up to 210MHz
- Low Normalized Inband Phase Noise of -230dBc/Hz Reduces System Noise Floor Contribution
- Manual or Automatic VCO Selection Permits Fast Switching
- Output Phase Reset and Adjustment Allow Synchronization of Multiple Synthesizers
- On-Chip Temperature Sensor with 7-Bit ADC Ensures Optimum VCO Selection
- Cycle Slip Reduction and Fast Lock Features Improve Accuracy and Acquisition Time
- VCO Lock Maintained Over Entire Temperature Range Provides Glitch-Free Operation
- Dual Differential Programmable Outputs Maximize Flexibility of Use
Applications/Uses
- Clock Generation
- Microwave Radios
- Test and Measurement
- Wireless Infrastructure
Description
The MAX2871 is an ultra-wideband phase-locked loop (PLL) with integrated voltage control oscillators (VCOs) capable of operating in both integer-N and fractional-N modes. When combined with an external reference oscillator and loop filter, the MAX2871 is a high-performance frequency synthesizer capable of synthesizing frequencies from 23.5MHz to 6.0GHz while maintaining superior phase noise and spurious performance.
The ultra-wide frequency range is achieved with the help of multiple integrated VCOs covering 3000MHz to 6000MHz, and output dividers ranging from 1 to 128. The device also provides dual differential output drivers, which can be independently programmed to deliver -1dBm to +8dBm output power. Both outputs can be muted by either software or hardware control.
The MAX2871 is controlled by a 4-wire serial interface and is compatible with 1.8V control logic. The device is available in a lead-free, RoHS-compliant, 5mm x 5mm, 32-pin TQFN package, and operates over an extended -40°C to +85°C temperature range.
The MAX2871 has an improved feature set and better overall phase noise and is fully pin- and software-compatible with the MAX2870.
The ultra-wide frequency range is achieved with the help of multiple integrated VCOs covering 3000MHz to 6000MHz, and output dividers ranging from 1 to 128. The device also provides dual differential output drivers, which can be independently programmed to deliver -1dBm to +8dBm output power. Both outputs can be muted by either software or hardware control.
The MAX2871 is controlled by a 4-wire serial interface and is compatible with 1.8V control logic. The device is available in a lead-free, RoHS-compliant, 5mm x 5mm, 32-pin TQFN package, and operates over an extended -40°C to +85°C temperature range.
The MAX2871 has an improved feature set and better overall phase noise and is fully pin- and software-compatible with the MAX2870.
What are the differences between MAX2870 and MAX2871? ›
Technical Docs
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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