Overview
The MAX2172ETL/V+T is a direct-conversion to low-IF tuner designed for digital audio broadcast (DAB) and terrestrial digital multimedia broadcast (T-DMB) applications. This component, produced by Analog Devices Inc./Maxim Integrated, is packaged in a 40-pin TQFN and 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 and tuner-on-board designs. It utilizes a direct-conversion to low-IF architecture, eliminating the need for an IF-SAW filter and providing a balanced 2.048MHz centre frequency baseband output to the demodulator. The tuner also includes a sigma-delta fractional-N synthesizer to optimize phase noise performance, which is crucial for OFDM applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 40-pin TQFN |
| Supply Voltage Range | 2.7V to 3.5V |
| Operating Temperature Range | -40°C to 85°C |
| 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 |
| VHF-III Sensitivity | -101dBm |
| L-Band Sensitivity | -101dBm |
| ACPR (N±1) | +45dBc |
| FM (S+N)/N | 26dB at -111dBm |
| Baseband Overload Detector | Controls RF AGC |
| Fast Channel Scan RSSI Output | 5-Bit |
Key Features
- Direct-conversion to low-IF architecture, eliminating the need for an IF-SAW filter.
- Provides a balanced 2.048MHz centre frequency baseband output to the demodulator.
- Sigma-delta fractional-N synthesizer for optimized phase noise performance.
- High level of component integration, enabling low power and tuner-on-board designs.
- 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 wide frequency range.
Q & A
- What is the primary application of the MAX2172ETL/V+T?
The MAX2172ETL/V+T is designed for digital audio broadcast (DAB) and terrestrial digital multimedia broadcast (T-DMB) applications.
- What is the package type of the MAX2172ETL/V+T?
The MAX2172ETL/V+T is packaged in a 40-pin TQFN.
- What is the supply voltage range for the MAX2172ETL/V+T?
The supply voltage range is 2.7V to 3.5V.
- What are the operating temperature ranges for the MAX2172ETL/V+T?
The operating temperature range is from -40°C to 85°C.
- What frequencies does the MAX2172ETL/V+T support?
The MAX2172ETL/V+T supports frequencies of 87MHz to 108MHz (FM), 168MHz to 240MHz (VHF-III), and 1452MHz to 1492MHz (L-band).
- What is the typical noise figure for VHF-III and L-Band?
The typical noise figure for VHF-III is 2.9dB and for L-Band is 3.1dB.
- What is the sensitivity of the MAX2172ETL/V+T for VHF-III and L-Band?
The sensitivity for both VHF-III and L-Band is -101dBm.
- What is the ACPR (N±1) of the MAX2172ETL/V+T?
The ACPR (N±1) is +45dBc.
- Does the MAX2172ETL/V+T have a baseband overload detector?
Yes, the MAX2172ETL/V+T has a baseband overload detector that controls RF AGC.
- What is the output of the fast channel scan RSSI?
The fast channel scan RSSI output is 5-Bit.
