The MAX9985 high-linearity, dual-channel downconversion mixer is designed to provide approximately 6dB gain, +28.5dBm of IIP3, and 10.5dB of noise figure (NF) ideal for diversity receiver applications. With a 700MHz to 1000MHz RF frequency range and a 570MHz to 865MHz LO frequency range, this mixer is ideal for low-side LO injection architectures. In addition, the broad frequency range makes the MAX9985 ideal for GSM 850/950, 2G/2.5G EDGE, WCDMA, cdma2000®, and iDEN® base-station applications.
The MAX9985 dual-channel downconverter achieves ahigh level of component integration. The MAX9985 integrates two double-balanced active mixer cores, two LO buffers, a dual-input LO selectable switch, and a pair of differential IF output amplifiers. In addition, integrated on-chip baluns at the RF and LO ports allow for single-ended RF and single-ended LO inputs. The MAX9985 requires a typical 0dBm LO drive. Supply current is adjustable up to 400mA.
The MAX9985 is available in a 36-pin thin QFN package (6mm x 6mm) with an exposed paddle. Electrical performance is guaranteed over the extended temperature range, from TC = -40°C to +85°C.
Key Features
Applications/Uses
700MHz to 1000MHz RF Frequency Range
570MHz to 865MHz LO Frequency Range
50MHz to 250MHz IF Frequency Range
6dB Typical Conversion Gain
10.5dB Typical Noise Figure
+28.5dBm Typical Input IP3
+16.2dBm Typical Input 1dB Compression Point
77dBc Typical 2RF-2LO Spurious Rejection at PRF = -10dBm
Dual Channels Ideal for Diversity Receiver Applications
47dB Typical Channel-to-Channel Isolation
-3dBm to +3dBm LO Drive
Integrated LO Buffer
Internal RF and LO Baluns for Single-Ended Inputs
Built-In SPDT LO Switch with 43dB LO1-to-LO2 Isolation and 50ns Switching Time
Pin-Compatible with MAX9995/MAX9995A 1700MHz to 2200MHz Mixers
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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