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MAX7042ATJ+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
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.
Applications
Remote Keyless Entry
Tire-Pressure Monitoring
Home and Office Lighting Control
Remote Sensing
Smoke Alarms
Home Automation
Local Telemetry Systems
Security Systems
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
MAX7042
308MHz/315MHz/418MHz/433.92MHz
Low-Power, FSK Superheterodyne Receiver
________________________________________________________________
Maxim Integrated Products
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MAX7042
TQFN
TOP VIEW
EN
N.C.
FSEL1
FSEL2
HVIN
DATA
LNASEL
32
EP
N.C.
N.C.
N.C.
N.C.
RSSI
XTAL2
XTAL1
AVDD
LNAIN
DVDD
DGND
DF
OP+
DS+
DS-
PDMAX
17
PDMIN
IFIN+
IFIN-
AGND
MIXOUT
MIXIN-
MIXIN+
LNAOUT
9
LNASRC
8
+
Pin Configuration
Ordering Information
19-3704; Rev 2; 1/12
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX7042ATJ+ -40°C TO +125°C 32 TQFN-EP*
Typical Application Circuit appears at end of data sheet.
MAX7042
308MHz/315MHz/418MHz/433.92MHz
Low-Power, FSK Superheterodyne Receiver
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(
Typical Application Circuit
, 50Ω system impedance, V
AVDD
= V
DVDD
= V
HVIN
= +2.4V to +3.6V, f
RF
= 308, 315, 418, and
433.92MHz; T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
AVDD
= V
DVDD
= V
HVIN
= +3.0V,
f
RF
= 433.92MHz, P
RFIN
≤ -80dBm, T
A
= +25°C, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
HVIN to AGND or DGND .......................................-0.3V to +6.0V
AVDD, DVDD to AGND or DGND..........................-0.3V to +4.0V
FSEL1, FSEL2, LNASEL,
EN, DATA...............................(DGND - 0.3V) to (HVIN + 0.3V)
All Other Pins............................(AGND - 0.3V) to (AVDD + 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
32-Pin TQFN (derate 34.5mW/°C above +70°C)..........2759mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Maximum RF Input Power ................................................+0dBm
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage (3V) V
DD
HVIN, AVDD, and DVDD connected
to power supply
2.4 3.0 3.6 V
Supply Voltage (5V) HVIN
HVIN connected to power supply,
AVDD and DVDD unconnected from
HVIN, but connected together
4.5 5.0 5.5 V
Operating, 1x I
LNA
6.2
315M H z ( 3V )
Operating, 2x I
LNA
6.8
Operating, 1x I
LNA
6.4
315M H z ( 5V )
Operating, 2x I
LNA
7.0
Operating, 1x I
LNA
6.4 8.7
434M H z ( 3V )
Operating, 2x I
LNA
7.0 8.6
Operating, 1x I
LNA
6.6 8.4
Supply Current I
DD
434M H z ( 5V )
Operating, 2x I
LNA
7.2 9.2
mA
T
A
= +25°C 0.02
T
A
= +85°C 0.1
Shutdown Current (3V) I
SHDN
All digital
inputs low
T
A
= +125°C 0.85 6
µA
T
A
= +25°C 0.6
T
A
= +85°C 1.4Shutdown Current (5V) I
SHDN
All digital
inputs low
T
A
= +125°C 4 7
µA
Startup Time t
ON
Time from EN = high to final signal
detection; does not include
baseband filter or data-
slicer reference settling
250 µs
DIGITAL I/O
Input High Threshold V
IH
0.9 x V
HVIN
V
Input Low Threshold V
IL
0.1 x V
HVIN
V
MAX7042
308MHz/315MHz/418MHz/433.92MHz
Low-Power, FSK Superheterodyne Receiver
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(
Typical Application Circuit
, 50Ω system impedance, V
AVDD
= V
DVDD
= V
HVIN
= +2.4V to +3.6V, f
RF
= 308, 315, 418, and
433.92MHz; T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
AVDD
= V
DVDD
= V
HVIN
= +3.0V,
f
RF
= 433.92MHz, P
RFIN
≤ -80dBm, T
A
= +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
HVIN
= +3.6V 8 15
Input High Pulldown Current I
IH
V
HVIN
= +5.5V 20 40
µA
V
HVIN
= +3.6V < 1 1
Input Low-Leakage Current I
IL
V
HVIN
= +5.5V < 1 1
µA
Output High Voltage V
OH
I
SOURCE
= 500µA V
HVIN
- 0.4 V
Output Low Voltage V
OL
I
SINK
= 500µA 0.4 V
VOLTAGE REGULATOR
Output Voltage V
REG
2.5 3.0 3.5 V
AC ELECTRICAL CHARACTERISTICS
(
Typical Application Circuit
, 50Ω system impedance, V
AVDD
= V
DVDD
= V
HVIN
= +2.4V to +3.6V, f
RF
= 308, 315, 418, and
433.92MHz; T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at V
AVDD
= V
DVDD
= V
HVIN
= +3.0V,
f
RF
= 433.92MHz, P
RFIN
≤ -80dBm, T
A
= +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Maximum Input Level 0 dBm
Operating, 1x I
LNA
-107
315MHz
setting
Operating, 2x I
LNA
-110
Operating, 1x I
LNA
-106
Sensitivity (Note 1)
434MHz
setting
Operating, 2x I
LNA
-109
dBm
Receiver Image Rejection 45 dB
LNA/MIXER
2x I
LNA
315MHz 0.94 - j3.2
Input Impedance (Note 2) Z
IN_LNA
Normalized to
50Ω
2x I
LNA
433.92MHz 0.94 - j2.1
1x I
LNA
315MHz -47
1dB Input Compression Point P
1dB
2x I
LNA
315MHz -52
dBm
1x I
LNA
315MHz -37
Input-Referred 3rd-Order Intercept
Point
IIP3
2x I
LNA
315MHz -42
dBm
LO Signal Feedthrough to
Antenna
-80 dBm
Mixer Output Impedance Zout
MIX
330 Ω
1x I
LNA
315MHz 52
2x I
LNA
315MHz 57
1x I
LNA
433.92MHz 47
Voltage Conversion Gain
330Ω IF filter
load
(Note 3)
2x I
LNA
433.92MHz 52
dB
IF LIMITING AMPLIFIER
Input Impedance Z
IN_IF
330 Ω
-3dB Bandwidth 10 MHz
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

MAX7042ATJ+T

Mfr. #:
Buy MAX7042ATJ+T
Manufacturer:
Maxim Integrated
Description:
RF Receiver 308/315/418/433.9MHz FSK Superhtrdyne Rec
Lifecycle:
New from this manufacturer.
Delivery:
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