MAX2850

PRODUCTION

5GHz, 4-Channel MIMO Transmitter

High-Performing, Cost-Effective RF Design for Wireless HD Video (WHDI) Enabling Longer Range and Better Video Reception

Data Sheet (Rev. 2) Product Selection Table

Part Models: 2
1ku List Price: Starting From $11.91

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Overview

5GHz 4x MIMO Downlink Transmitters, Single Uplink IEEE 802.11a Receiver
- 4900MHz to 5900MHz Frequency Range
- -5dBm Transmit Power (54Mbps OFDM)
- Coherent LO Among Transmitters
- 31dB Tx Gain-Control Range with 0.5dB Step Size, Digitally Controlled
- Tx/Rx I/Q Error and LO Leakage Detection and Adjustment
- Programmable 20MHz/40MHz Tx I/Q Lowpass Anti-Aliasing Filter
- 4-to-1 Analog Mux for PA Power Detect
- 4-Channel PA On/Off Control
- 4.5dB Rx Noise Figure
- 70dB Rx Gain-Control Range with 2dB Step Size, Digitally Controlled
- 60dB Dynamic Range Receiver RSSI
- RF Wideband Receiver RSSI
- Programmable 20MHz/40MHz Rx I/Q Lowpass Channel Filters
- Sigma-Delta Fractional-N PLL with 76Hz Resolution
- Monolithic Low-Noise VCO with -35dBc Integrated Phase Noise
- 4-Wire SPI™ Digital Interface
- I/Q Analog Baseband Interface
- Digital Tx/Rx Mode Control
- On-Chip Digital Temperature Sensor Readout
- Complete Baseband Interface
- Digital Tx/Rx Mode Control
+2.7V to +3.6V Supply Voltage
Small, 68-Pin Thin QFN Package (10mm x 10mm)

The MAX2850 is a single-chip, 4-channel RF transmitter IC designed for 5GHz wireless HDMI applications. The IC includes all circuitry required to implement the complete 4-channel MIMO RF transmitter function and crystal oscillator, providing a fully integrated transmit path, VCO, frequency synthesis, and baseband/control interface. It includes a fast-settling, sigma-delta RF fractional synthesizer with 76Hz frequency programming step size. The IC also integrates on-chip I/Q amplitude and phase-error calibration circuits. Dynamic on/off control of four external PAs is implemented with programmable precision voltages. A 4-to-1 analog mux routes external PA power-detect voltages to the RSSI pin.

On-chip monolithic filters are included for transmitter I/Q baseband signal reconstruction to support both 20MHz and 40MHz RF channels. The baseband filtering and Tx signal paths are optimized to meet stringent WHDI requirements. The upconverter local oscillator is coherent among all the transmitter channels.

The reverse-link control channel uses an on-chip 5GHz OFDM receiver. It shares the RF synthesizer and LO generation circuit with the MIMO transmitters. The receiver includes both an in-channel RSSI and an RF RSSI.

The MIMO transmitter chip is housed in a small, 68-pin thin QFN leadless plastic package with exposed pad.

Applications

5GHz Beam Steering Transmitter
5GHz FDD Backhaul and WiMax™
5GHz MIMO Transmitter Up to Four Spatial Streams
5GHz Wireless HDMI (WHDI)

Part Models: 2
1ku List Price: Starting From $11.91

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX2850ITK+	68-LFCSP-10X10X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX2850ITK+T	68-LFCSP-10X10X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 14, 2023 - 2275A WAFER FAB
		pcn_2275a
MAX2850ITK+	PRODUCTION
MAX2850ITK+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
RF Analog Receivers 1
MAX2852	Obsolete	5GHz Receiver
RF Analog Transceivers 1
MAX2851	PRODUCTION	5GHz, 5-Channel MIMO Receiver

Tools & Simulations

IBIS Model 1

MAX2850 IBIS Model

Evaluation Kits

Evaluation Kit for the MAX2850

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Features and Benefits

On-Board Line Driver and Voltage Reference
50Ω SMA Connectors on All RF and Baseband Ports
PC Control Software Available at www.maximintegrated.com

Product Details

The MAX2850 evaluation kit (EV kit) simplifies testing of the MAX2850’s receive and transmit performance in 802.11a applications operating in the 4.9GHz to 5.9GHz ISM band. The EV kit provides 50Ω SMA connectors for all RF and baseband inputs and outputs. Differential-to-single- ended and single-ended-to-differential line drivers are provided to convert the differential I/Q baseband inputs and outputs to single-ended.

Applications