MAX7042 Maxim Integrated Products, MAX7042 Datasheet
MAX7042
Manufacturer Part Number
MAX7042
Description
308MHz/315MHz/418MHz/433.92MHz Low-Power FSK Superheterodyne Receiver
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX7042.pdf
(19 pages)
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Manufacturer:
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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 thin QFN and
is specified over the automotive -40°C to +125°C
temperature range.
19-3704; Rev 1; 3/07
Typical Application Circuit appears at end of data sheet.
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.
Remote Keyless Entry
Tire-Pressure Monitoring
Home and Office Lighting Control
Remote Sensing
Smoke Alarms
Home Automation
Local Telemetry Systems
Security Systems
Low-Power, FSK Superheterodyne Receiver
________________________________________________________________ Maxim Integrated Products
General Description
308MHz/315MHz/418MHz/433.92MHz
Applications
♦ +2.4V to +3.6V or +4.5V to +5.5V Single-Supply
♦ Four User-Selectable Carrier Frequencies
♦ -110dBm RF Input Sensitivity at 315MHz
♦ -109dBm RF Input Sensitivity at 433.92MHz
♦ Fast Startup (< 250µs)
♦ Small 32-Pin Thin QFN Package
♦ Low Operating Supply Current
♦ Integrated PLL, VCO, and Loop Filter
♦ 45dB Integrated Image Rejection
♦ Selectable IF BW with External Filter
♦ Positive and Negative Peak Detectors
♦ RSSI Output
+Denotes a lead-free package.
*EP = Exposed paddle.
**Future product—contact factory for availability.
MAX7042ATJ+
MAX7042AAX+**
Operation
308, 315, 418, and 433.92MHz
TOP VIEW
6.2mA Continuous
20nA Power-Down
LNASEL
PART
FSEL1
FSEL2
DATA
HV
N.C.
N.C.
EN
IN
25
26
27
28
29
30
31
32
+
24
1
TEMP RANGE PIN-PACKAGE
23
2
-40°C TO
-40°C TO
+125°C
+125°C
Ordering Information
22
3
THIN QFN
MAX7042
21
4
Pin Configuration
20
5
32 Thin QFN-EP*
19
6
36 SSOP
www.DataSheet4U.com
18
7
17
8
Features
16
15
14
13
12
11
10
9
IFIN+
IFIN-
AGND
MIXOUT
MIXIN-
MIXIN+
LNAOUT
LNASRC
T3255-3
CODE
A36-2
PKG
1
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