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315MHz/433MHz ASK Superheterodyne
Receiver with AGC Lock
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, V AVDD = V DVDD = V DD5 = +3.0V to +3.6V, all RF inputs are referenced to 50 Ω , f RF = 315MHz,
T A = -40°C to +105°C, unless otherwise noted. Typical values are at V AVDD = V DVDD = V DD5 = +3.3V and T A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Maximum Load Capacitance
Output High Voltage
Output Low Voltage
C LOAD
10
V DD5
0
pF
V
V
CRYSTAL OSCILLATOR
Crystal Frequency (Note 5)
f XTAL
f RF = 433MHz
f RF = 315MHz
V XTALSEL = 0V
V XTALSEL = V DD5
V XTALSEL = 0V
V XTALSEL = V DD5
6.6128
13.2256
4.7547
9.5094
MHz
Crystal Tolerance
50
ppm
Input Capacitance
From each pin to ground
6.2
pF
Note 1: 100% tested at T A = +25 ° C. Guaranteed by design and characterization over temperature.
Note 2: IRSEL is internally set to 375MHz IR mode. It can be left open when the 375MHz image-rejection setting is desired. Bypass
to AGND with a 1nF capacitor in a noisy environment.
Note 3: BER = 2 x 10 -3 , Manchester encoded, data rate = 4kbps, IF bandwidth = 280kHz.
Note 4: Input impedance is measured at the LNAIN pin. Note that the impedance includes the 15nH inductive degeneration con-
nected from the LNA source to ground. The equivalent input circuit is 50 Ω in series with 2.2pF.
Note 5: Crystal oscillator frequency for other RF carrier frequency within the 300MHz to 450MHz range is (f RF - 10.7MHz)/64 for
XTALSEL = 0V, and (f RF - 10.7MHz)/32 for XTALSEL = V DD5 .
Typical Operating Characteristics
(Typical Application Circuit , V AVDD = V DVDD = V DD5 = +3.3V, f RF = 315MHz, T A = +25°C, unless otherwise noted.)
6.0
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
7.0
SUPPLY CURRENT
vs. RF FREQUENCY
100
BIT-ERROR RATE
vs. AVERAGE CARRIER POWER
5.8
5.6
5.4
+85 ° C
+105 ° C
6.5
6.0
+105 ° C
10
f RF = 433MHz
5.2
5.5
5.0
4.8
4.6
4.4
4.2
-40 ° C
+25 ° C
5.0
4.5
4.0
3.5
-40 ° C
+25 ° C
+85 ° C
1
0.1
f RF = 315MHz
4.0
3.0
0.01
3.0
3.1
3.2
3.3
3.4
3.5
3.6
250
300
350
400
450
500
-130 -128 -126 -124 -122 -120 -118 -116 -114
SUPPLY VOLTAGE (V)
RF FREQUENCY (MHz)
AVERAGE CARRIER POWER (dBm)
_______________________________________________________________________________________
5
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