Complete SDARS Receiver The MAX2140ETH is a direct conversion tuner IC manufactured by Maxim Integrated (now part of Analog Devices). Below are its specifications, descriptions, and features based on factual information:
### **Specifications:**
- **Manufacturer:** Maxim Integrated (now Analog Devices)
- **Part Number:** MAX2140ETH
- **Package:** 48-Pin TQFN-EP (7x7mm)
- **Operating Temperature Range:** -40°C to +85°C
- **Supply Voltage:** 3.3V (typical)
- **Frequency Range:** 48MHz to 860MHz (covers VHF and UHF bands)
- **Input Signal Level:** -85dBm to +5dBm (adjustable gain)
- **Noise Figure:** Typically 4dB
- **Conversion Gain:** Adjustable up to 70dB
- **IF Output:** Zero-IF (direct conversion to baseband I/Q signals)
- **LO Phase Noise:** Typically -95dBc/Hz at 10kHz offset
### **Description:**
The MAX2140ETH is a direct conversion tuner designed for digital TV and set-top box applications. It integrates a low-noise amplifier (LNA), mixer, local oscillator (LO), and baseband amplifiers to convert RF signals directly to I/Q baseband outputs. It supports global TV standards, including DVB-T, ISDB-T, and ATSC.
### **Features:**
- **Direct Conversion Architecture:** Eliminates the need for external IF SAW filters.
- **Integrated LNA and Mixer:** Reduces external component count.
- **Programmable Gain Control (PGC):** Adjustable RF and baseband gain.
- **Low Power Consumption:** Typically 500mW in active mode.
- **I/Q Outputs:** Differential baseband outputs for demodulation.
- **Integrated LO with PLL:** Supports fractional-N synthesis for fine-tuning.
- **SPI Interface:** For digital control and configuration.
- **ESD Protection:** Robust ESD protection on critical pins.
For further details, refer to the official datasheet from Analog Devices (formerly Maxim Integrated).
