Ultra-Wideband, Direct-Conversion, L-Band Satellite Tuner
Industry's Widest L-Band Tuner with 1GHz RF Bandwidth
说明The MAX2223 low-cost, direct-conversion tuner IC is designed for satellite set-top and Very Small Aperture Terminal (VSAT) applications. The device directly converts the satellite signals from the LNB to baseband using a broadband I/Q down-converter. The operating frequency range extends from 925MHz to 2175MHz.
The device includes an LNA and an RF variable-gain amplifier, I and Q down-converting mixers, and baseband amplifiers. The RF variable-gain amplifier provides more than 70dB of gain control range. The device supports an RF bandwidth of 1GHz.
The device includes fully monolithic VCOs, as well as a complete fractional-N frequency synthesizer. Additionally, an on-chip crystal oscillator is provided along with a buffered output for driving additional tuners and demodulators. Synthesizer programming and device configuration are accomplished with a 2-wire serial interface. The IC features a VCO auto-select (VAS) function that automatically selects the proper VCO. For multituner applications, the device can be configured to have one of two 2-wire interface addresses. A low-power standby mode is available whereupon the signal path is shutdown while leaving the reference oscillator, digital interface, and buffer circuits active, providing a method to reduce power in single and multituner applications.
A small number of passive components are needed to form a complete broadband satellite tuner DVB-S2 RF front-end solution. The tuner is available in a very small, 5mm x 5mm, 28-pin TQFN package.
- 925MHz to 2175MHz Frequency Range
- Monolithic VCO
- Low Phase Noise: -97dBc/Hz at 10kHz
- No Calibration Required
- High Dynamic Range: -75dBm to 0dBm
- 1GHz RF Bandwidth Supported
- Single +3.3V ±5% Supply
- Low-Power Standby Mode
- Address Pin for Multituner Applications
- Differential I/Q Interface
- I2C 2-Wire Serial Interface
- Very Small, 5mm x 5mm, 28-Pin TQFN Package
|Part Number||Input Frequency|
|IF Output Freq.|
(mm x mm)
|MAX2223 NEW!||925 to 2175||500||8||3.13 to 3.47||VSAT||5.0 x 5.0||-40 to +85|