Datasheet

MAX7042
308MHz/315MHz/418MHz/433.92MHz
Low-Power, FSK Superheterodyne Receiver
_______________________________________________________________________________________ 5
6.1
6.5
6.3
6.9
6.7
7.3
7.1
7.5
300 350 375325 400 425 450
SUPPLY CURRENT vs. RF FREQUENCY
(2x I
LNA
)
MAX7042 toc04
RF FREQUENCY (MHz)
SUPPLY CURRENT (mA)
+125°C
+85°C
+25°C
-40°C
DEEP-SLEEP CURRENT vs. TEMPERATURE
MAX7042 toc05
TEMPERATURE (°C)
DEEP-SLEEP CURRENT (nA)
11085603510-15
200
400
600
800
1000
0
-40
V
DD
= +3.6V
V
DD
= +3.0V
V
DD
= +2.4V
BIT-ERROR RATE vs. AVERAGE INPUT POWER
(1x I
LNA
)
MAX7042 toc06
AVERAGE INPUT POWER (dBm)
BIT-ERROR RATE (%)
-106
-108-110
-112
0.1
1
10
100
0.01
-114 -104
f
RF
= 433.92MHz
0.2% BER
f
RF
= 315MHz
BIT-ERROR RATE vs. AVERAGE INPUT POWER
(2x I
LNA
)
MAX7042 toc07
AVERAGE INPUT POWER (dBm)
BIT-ERROR RATE (%)
-109
-113 -111
-115
0.1
1
10
100
0.01
-117 -107
f
RF
= 433.92MHz
0.2% BER
f
RF
= 315MHz
SENSITIVITY (dBm)
-108
-107
-106
-105
-104
-103
-109
SENSITIVITY vs. TEMPERATURE
(1x I
LNA
)
MAX7042 toc08
TEMPERATURE (
°
C)
11085603510-15-40
f
RF
= 433.92MHz
f
RF
= 315MHz
SENSITIVITY (dBm)
-111
-110
-109
-108
-107
-106
-112
SENSITIVITY vs. TEMPERATURE
(2x I
LNA
)
MAX7042 toc09
TEMPERATURE (
°
C)
11085603510-15-40
f
RF
= 433.92MHz
f
RF
= 315MHz
SENSITIVITY
vs. FREQUENCY DEVIATION
MAX7042 toc10
FREQUENCY DEVIATION (kHz)
SENSITIVITY (dBm)
10
-110
-108
-106
-104
-102
-100
-112
1 100
FREQUENCY DEVIATION IS
MEASURED FROM 0 TO PEAK
0
0.6
0.3
1.2
0.9
1.5
1.8
-3
-1
-2
1
0
2
3
-90 -50 -30-70 -10 10
RSSI AND DELTA
vs. IF INPUT POWER
MAX7042 toc11
IF INPUT POWER (dBm)
RSSI (V)
DELTA (%)
RSSI
DELTA
0
0.8
0.4
1.6
1.2
2.0
10.3 10.5 10.610.4 10.810.7 10.9 11.0
FSK DEMODULATOR OUTPUT
vs. IF FREQUENCY
MAX7042 toc12
IF FREQUENCY (MHz)
FSK DEMODULATION OUTPUT (V)
Typical Operating Characteristics (continued)
( Typical Application Circuit , V
DD
= 3.0V, f
RF
= 433.92MHz, IF BW = 280kHz, data rate = 4kbps Manchester encoded, frequency
deviation = ±50kHz, BER = 0.2%, T
A
= +25°C, unless otherwise noted.)