MAX1471 Maxim Integrated Products, MAX1471 Datasheet
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MAX1471
Manufacturer Part Number
MAX1471
Description
3V/5V ASK/FSK Superheterodyne Receiver
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX1471.pdf
(26 pages)
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The MAX1471 low-power, CMOS, superheterodyne, RF
dual-channel receiver is designed to receive both ampli-
tude-shift-keyed (ASK) and frequency-shift-keyed (FSK)
data without reconfiguring the device or introducing any
time delay normally associated with changing modula-
tion schemes. The MAX1471 requires few external com-
ponents 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 low-
noise amplifier (LNA), an image-reject (IR) mixer, a fully
integrated phase-locked loop (PLL), local oscillator
(LO), 10.7MHz IF limiting amplifier with received-signal-
strength 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.
19-3272; Rev 1; 3/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Automotive Remote Keyless Entry (RKE)
Tire Pressure Monitoring Systems
Garage Door Openers
Wireless Sensors
Wireless Keys
Security Systems
Medical Systems
Home Automation
Local Telemetry Systems
________________________________________________________________ Maxim Integrated Products
General Description
ASK/FSK Superheterodyne Receiver
315MHz/434MHz Low-Power, 3V/5V
Applications
♦ ASK and FSK Demodulated Data on Separate
♦ Specified over Automotive -40°C to +125°C
♦ Low Operating Supply Voltage Down to 2.4V
♦ On-Chip 3V Regulator for 5V Operation
♦ Low Operating Supply Current
♦ Discontinuous Receive (DRX) Low-Power
♦ Fast-On Startup Feature < 250µs
♦ Integrated PLL, VCO, and Loop Filter
♦ 45dB Integrated Image Rejection
♦ RF Input Sensitivity*
♦ Selectable IF BW with External Filter
♦ Programmable Through Serial User Interface
♦ RSSI Output and High Dynamic Range with AGC
**EP = Exposed pad.
*0.2% BER, 4kbps, Manchester-encoded data, 280kHz IF BW
MAX1471ATJ
Outputs
Temperature Range
Management
TOP VIEW
7mA Continuous Receive Mode
1.1µA Deep-Sleep Mode
ASK: -114dBm
FSK: -108dBm
PART
XTAL2
XTAL1
LNAIN
DSA+
OPA+
DSA-
AV
DFA
DD
1
2
3
4
5
6
7
8
32
9
31
10
-40°C to +125°C
TEMP RANGE
Ordering Information
11
30
THIN QFN
MAX1471
12
29
Pin Configuration
13
28
14
27
15
26
PIN-PACKAGE
32 Thin QFN-EP**
16
25
Features
24
23
22
21
20
19
18
17
DGND
DFF
OPF+
DSF+
DSF-
PDMAXF
PDMINF
DV
DD
1