Manual

MAX7042
308MHz/315MHz/418MHz/433.92MHz
Low-Power, FSK Superheterodyne Receiver
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, 50Ω system impedance, AV
DD
= DV
DD
= HV
IN
= +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 AV
DD
= DV
DD
= HV
IN
= +3.0V, f
RF
= 433.92MHz,
P
RFIN
≤ -80dBm, T
A
= +25°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
HV
IN
= +3.6V 8 15
Input High Pulldown Current I
IH
HV
IN
= +5.5V 20 40
µA
HV
IN
= +3.6V <1 1
Input Low-Leakage Current I
IL
HV
IN
= +5.5V <1 1
µA
Output High Voltage V
OH
I
SOURCE
= 500µA HV
IN
- 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, AV
DD
= DV
DD
= HV
IN
= +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 AV
DD
= DV
DD
= HV
IN
= +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
11
Normalized to
50Ω
2x I
LNA
433.92MHz 0.94 - j2.1
1x I
LNA
315MHz -47
1dB Input Compression Point
(Notes 2, 3)
P
1dB
2x I
LNA
315MHz -52
dBm
1x I
LNA
315MHz -37
Input-Referred 3rd-Order Intercept
Point (Notes 2, 3)
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
(Notes 2, 3)
2x I
LNA
433.92MHz 52
dB
IF LIMITING AMPLIFIER
Input Impedance Z
11
330 Ω
-3dB Bandwidth 10 MHz