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MAX2108

Manufacturer: MAX

Direct-Conversion Tuner IC
Partnumber Manufacturer Quantity Availability
MAX2108 MAX 486 In Stock

Description and Introduction

Direct-Conversion Tuner IC The MAX2108 is a direct-conversion tuner IC designed for digital satellite applications, manufactured by Maxim Integrated (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Frequency Range:** 925 MHz to 2175 MHz  
- **Supply Voltage:** +4.5V to +5.5V  
- **Current Consumption:** 120 mA (typical)  
- **Conversion Gain:** 45 dB (typical)  
- **Noise Figure:** 7 dB (typical)  
- **Input IP3 (Third-Order Intercept Point):** -5 dBm (typical)  
- **LO (Local Oscillator) Phase Noise:** -85 dBc/Hz at 100 kHz offset  
- **IF (Intermediate Frequency) Output:** DC to 500 MHz  
- **Package:** 48-pin TQFP (Thin Quad Flat Pack)  

### **Descriptions:**  
The MAX2108 is a direct-conversion tuner IC optimized for digital satellite receivers, set-top boxes, and other broadband communication systems. It integrates a low-noise amplifier (LNA), mixer, LO synthesizer, and baseband amplifiers, eliminating the need for external IF SAW filters. Its direct-conversion architecture simplifies receiver design by converting RF signals directly to baseband.  

### **Features:**  
- **Integrated LNA, Mixer, and LO Synthesizer**  
- **On-Chip VCO (Voltage-Controlled Oscillator) with PLL**  
- **Single 5V Supply Operation**  
- **Low Phase Noise for High-Quality Signal Reception**  
- **DC-Coupled IF Outputs for Baseband Processing**  
- **I²C-Compatible Serial Interface for Control**  
- **High Linearity for Improved Signal Handling**  

The MAX2108 is designed for applications requiring high performance in satellite and broadband communication systems.

Application Scenarios & Design Considerations

Direct-Conversion Tuner IC

Alternative Part Number

  • SI4133 --: Dual-band RF synthesizer with integrated VCOs, functionally similar to the MAX2108 tuner IC and widely used as a drop-in style alternative in RF front-end designs.
  • LMX2541 --: Integrated PLL/VCO frequency synthesizer covering a similar RF range, offering comparable performance and easy replacement in tuner applications.
  • ADF4351 --: Broadband fractional-N synthesizer with integrated VCO, a common alternative when the MAX2108 is unavailable, with similar RF output capability.
  • LTC5505-2 --: RF power detector in the same functional class as the MAX2108, with comparable frequency range and logarithmic output, suitable as a direct functional substitute.
  • AD8317 --: Wideband logarithmic RF detector offering similar detection range and response, commonly used to replace MAX-series RF detectors in receiver designs.
  • LMH2110 --: RF power detector with logarithmic output covering a similar frequency band, providing an alternative source with comparable performance characteristics.

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