Overview
The MAX2172ETL/V+T is a direct-conversion to low-IF tuner designed by Maxim Integrated, now part of Analog Devices Inc. This component is specifically tailored for digital audio broadcast (DAB) and terrestrial digital multimedia broadcast (T-DMB) applications. It covers a wide range of input frequencies including 87MHz to 108MHz (FM), 168MHz to 240MHz (VHF-III), and 1452MHz to 1492MHz (L-band). The MAX2172ETL/V+T features a high level of component integration, enabling low-power, tuner-on-board designs. The direct-conversion to low-IF architecture eliminates the need for an IF-SAW filter, providing a balanced 2.048MHz center frequency baseband output to the demodulator. Additionally, it includes a sigma-delta fractional-N synthesizer to optimize phase noise performance for OFDM applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 40-pin TQFN (6mm x 6mm) |
| Supply Voltage Range | 2.7V to 3.5V |
| Operating Temperature Range | -40°C to 85°C |
| Input Frequency Range | 87MHz to 108MHz (FM), 168MHz to 240MHz (VHF-III), 1452MHz to 1492MHz (L-band) |
| Typical Noise Figure (VHF-III) | 2.9dB |
| Typical Noise Figure (L-Band) | 3.1dB |
| Sensitivity (VHF-III and L-Band) | -101dBm |
| ACPR (N±1) | +45dBc |
| FM (S+N)/N at -111dBm | 26dB |
| Baseband Overload Detector | Controls RF AGC |
| Fast Channel Scan RSSI Output | 5-Bit |
| Max Supply Current | 62 mA |
Key Features
- High component integration for low-power, tuner-on-board designs.
- Direct-conversion to low-IF architecture, eliminating the need for an IF-SAW filter.
- Provides a balanced 2.048MHz center frequency baseband output to the demodulator.
- Incorporates a sigma-delta fractional-N synthesizer for optimized phase noise performance in OFDM applications.
- Buffered reference clock at the crystal frequency.
- Baseband overload detector controls RF AGC.
- Fast channel scan RSSI 5-Bit output.
Applications
The MAX2172ETL/V+T is primarily used in digital audio broadcast (DAB) and terrestrial digital multimedia broadcast (T-DMB) applications. It is also suitable for communications and networking systems due to its robust performance and low power consumption.
Q & A
- What is the MAX2172ETL/V+T used for?
The MAX2172ETL/V+T is used for digital audio broadcast (DAB) and terrestrial digital multimedia broadcast (T-DMB) applications.
- What is the input frequency range of the MAX2172ETL/V+T?
The input frequency range includes 87MHz to 108MHz (FM), 168MHz to 240MHz (VHF-III), and 1452MHz to 1492MHz (L-band).
- What type of package does the MAX2172ETL/V+T come in?
The MAX2172ETL/V+T comes in a 40-pin TQFN package (6mm x 6mm).
- What is the operating temperature range of the MAX2172ETL/V+T?
The operating temperature range is -40°C to 85°C.
- What is the typical noise figure for VHF-III and L-Band frequencies?
The typical noise figure is 2.9dB for VHF-III and 3.1dB for L-Band.
- What is the sensitivity of the MAX2172ETL/V+T for VHF-III and L-Band frequencies?
The sensitivity is -101dBm for both VHF-III and L-Band frequencies.
- Does the MAX2172ETL/V+T require an IF-SAW filter?
No, the direct-conversion to low-IF architecture eliminates the need for an IF-SAW filter.
- What type of synthesizer is used in the MAX2172ETL/V+T?
A sigma-delta fractional-N synthesizer is used to optimize phase noise performance.
- What is the maximum supply current of the MAX2172ETL/V+T?
The maximum supply current is 62 mA.
- What is the purpose of the baseband overload detector in the MAX2172ETL/V+T?
The baseband overload detector controls the RF AGC.
