The MAX1471 low-power, CMOS, superheterodyne, RF
dual-channel receiver is designed to receive both amplitude-
shift-keyed (ASK) and frequency-shift-keyed (FSK)
data without reconfiguring the device or introducing any
time delay normally associated with changing modulation
schemes. The MAX1471 requires few external components
to realize a complete wireless RF digital data
receiver for the 300MHz to 450MHz ISM bands.
The MAX1471 includes all the active components
required in a superheterodyne receiver including: a lownoise
amplifier (LNA), an image-reject (IR) mixer, a fully
integrated phase-locked loop (PLL), local oscillator
(LO), 10.7MHz IF limiting amplifier with received-signalstrength
indicator (RSSI), low-noise FM demodulator,
and a 3V voltage regulator. Differential peak-detecting
data demodulators are included for both the FSK and
ASK analog baseband data recovery. The MAX1471
includes a discontinuous receive (DRX) mode for low-power
operation, which is configured through a serial
interface bus.
The MAX1471 is available in a 32-pin thin QFN package
and is specified over the automotive -40°C to +125°C
temperature range.
Key Features
Applications/Uses
ASK and FSK Demodulated Data on Separate Outputs
Specified over Automotive -40°C to +125°C Temperature Range
Low Operating Supply Voltage Down to 2.4V
On-Chip 3V Regulator for 5V Operation
Low Operating Supply Current
7mA Continuous Receive Mode
1.1µA Deep-Sleep Mode
Discontinuous Receive (DRX) Low-Power Management
Fast-On Startup Feature < 250µs
Integrated PLL, VCO, and Loop Filter
45dB Integrated Image Rejection
RF Input Sensitivity*
ASK: -114dBm
FSK: -108dBm
Selectable IF BW with External Filter
Programmable Through Serial User Interface
RSSI Output and High Dynamic Range with AGC
*0.2% BER, 4kbps, Manchester-encoded data, 280kHz IF BW
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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