Instruction Manual

MAX1471
315MHz/434MHz Low-Power, 3V/5V
ASK/FSK Superheterodyne Receiver
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, AV
DD
= DV
DD
= HV
IN
= +2.4V to +3.6V, f
RF
= 300MHz to 450MHz, T
A
= -40°C to +125°C, unless otherwise
noted. Typical values are at AV
DD
= DV
DD
= HV
IN
= +3.0V, f
RF
= 434 MHz, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input-High Leakage Current I
IH
(Note 2) -10 µA
Input-Low Leakage Current I
IL
(Note 2) 10 µA
Input Capacitance C
IN
(Note 2) 2.0 pF
VOLTAGE REGULATOR
Output Voltage V
REG
HV
IN
= 5.0V, I
LOAD
= 7.0mA 3.0 V
AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, AV
DD
= DV
DD
= HV
IN
= +2.4V to +3.6V, f
RF
= 300MHz to 450MHz, T
A
= -40°C to +125°C, unless otherwise
noted. Typical values are at AV
DD
= DV
DD
= HV
IN
= +3.0V, f
RF
= 434 MHz, T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
GENERAL CHARACTERISTICS
ASK
-114
Receiver Sensitivity RF
IN
0.2% BER, 4kbps
Manchester Code, 280kHz
IF BW, 50Ω
FSK
-108
dBm
Maximum Receiver Input Power
Level
RF
MAX
0
dBm
Receiver Input Frequency Range
f
RF
300
450
MHz
Receiver Image Rejection IR (Note 3) 45 dB
LNA/MIXER (Note 4)
f
RF
= 315MHz 1 - j4.7
LNA Input Impedance Z
11
Normalized to 50Ω
f
RF
= 434MHz 1 - j3.4
Voltage Conversion Gain (High-
Gain Mode)
47.5
dB
Input-Referred 3rd-Order
Intercept Point (High-Gain Mode)
-38
dBm
Voltage Conversion Gain (Low-
Gain Mode)
12.2
dB
Input-Referred 3rd-Order
Intercept Point (Low-Gain Mode)
-5
dBm
LO Signal Feedthrough to
Antenna
-90
dBm
Mixer Output Impedance Z
OUT
330
Ω
IF
Input Impedance Z
11
330
Ω
Operating Frequency f
IF
10.7
MHz
3dB Bandwidth 10
MHz
FM DEMODULATOR
Demodulator Gain G
FM
2.2
mV/kHz