315MHz/434MHz ASK Superheterodyne
Receiver
AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, V DD5 = +4.5V to +5.5V, all RF inputs are referenced to 50 Ω , f RF = 433.92MHz, T A = -40°C to +125°C,
unless otherwise noted. Typical values are at V DD5 = +5.0V and T A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DATA FILTER
Maximum Bandwidth
DATA SLICER
Comparator Bandwidth
Output High Voltage
Output Low Voltage
CRYSTAL OSCILLATOR
50
100
V VDD5
0
kHz
kHz
V
V
Crystal Frequency (Note 5)
f XTAL
f RF = 433.92MHz
f RF = 315MHz
V XTALSEL = 0V
V XTALSEL = V DVDD
V XTALSEL = 0V
V XTALSEL = V DVDD
6.6128
13.2256
4.7547
9.5094
MHz
Crystal Tolerance
50
ppm
Input Capacitance
Maximum Load Capacitance
C LOAD
From each pin to ground
6.2
10
pF
pF
Note 1: 100% tested at T A = +125°C. Guaranteed by design and characterization over entire temperature range.
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: Peak power level. BER = 2 x 10 -3 , Manchester encoded, data rate = 4kbps, IF bandwidth = 280kHz.
Note 4: The voltage conversion gain is measured with the LNA input matching inductor and the LNA/Mixer resonator in place, and
does not include the IF filter insertion loss.
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 DVDD .
4
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