MAX7042_12 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – 308MHz/315MHz/418MHz/433.92MHz Low-Power, FSK Superheterodyne Receiver

19-3704; Rev 2; 1/12
EVAALVUAAILTAIOBNLEKIT _{308MHz/315MHz/418MHz/433.92MHz}
Low-Power, FSK Superheterodyne Receiver
General Description
The MAX7042 fully integrated, low-power, CMOS
superheterodyne RF receiver is designed to receive
frequency-shift-keyed (FSK) data at rates up to 66kbps
nonreturn-to-zero (NRZ) (33kbps Manchester). The
MAX7042 requires only a few external components to
realize a complete wireless RF receiver at 308, 315,
418, and 433.92MHz.
The MAX7042 includes all the active components
required in a superheterodyne receiver including a low-
noise amplifier (LNA), an image-rejection (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 regulator. Differential peak-detecting data
demodulators are included for baseband data recovery.
The MAX7042 is available in a 32-pin TQFN and is
specified over the automotive -40°C to +125°C tem-
perature range.
Features
o +2.4V to +3.6V or +4.5V to +5.5V Single-Supply
Operation
o Four User-Selectable Carrier Frequencies
308, 315, 418, and 433.92MHz
o -110dBm RF Input Sensitivity at 315MHz
o -109dBm RF Input Sensitivity at 433.92MHz
o Fast Startup (< 250µs)
o Small 32-Pin TQFN Package
o Low Operating Supply Current
6.2mA Continuous
20nA Power-Down
o Integrated PLL, VCO, and Loop Filter
o 45dB Integrated Image Rejection
o Selectable IF BW with External Filter
o Positive and Negative Peak Detectors
o RSSI Output
Applications
Remote Keyless Entry
Tire-Pressure Monitoring
Home and Office Lighting Control
Remote Sensing
Smoke Alarms
Home Automation
Local Telemetry Systems
Security Systems
Typical Application Circuit appears at end of data sheet.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX7042ATJ+
-40°C TO +125°C
32 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configuration
TOP VIEW
24 23 22 21 20 19 18 17
N.C. 25
16 IFIN+
EN 26
15 IFIN-
FSEL1 27
14 AGND
FSEL2 28
HVIN 29
MAX7042
13 MIXOUT
12 MIXIN-
DATA 30
11 MIXIN+
LNASEL 31
EP
N.C. 32
10 LNAOUT
9 LNASRC
+
12345678
TQFN
________________________________________________________________ Maxim Integrated Products 1
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or visit Maxim’s website at www.maxim-ic.com.