User guide

MAX7032
Low-Cost, Crystal-Based, Programmable,
ASK/FSK Transceiver with Fractional-N PLL
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, 50Ω system impedance, AV
DD
= DV
DD
= P
AVDD
= HV
IN
= +2.1V 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
= PAV
DD
= HV
IN
= +2.7V, T
A
= +25°C, unless otherwise
noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL I/O
Input High Threshold V
IH
(Note 2) 0.9 x HV
IN
V
Input Low Threshold V
IL
(Note 2) 0.1 x HV
IN
V
Pulldown Sink Current SCLK, ENABLE, T/R, DATA (HV
IN
= 5.5V) 20 µA
Pullup Source Current DIO, CS (HV
IN
= 5.5V) 20 µA
Output-Low Voltage V
OL
I
SINK
= 500µA 0.15 V
Output-High Voltage V
OH
I
SOURCE
= 500µA
HV
IN
-
0.26
V
AC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, 50Ω system impedance, AV
DD
= DV
DD
= PAV
DD
= HV
IN
= +2.1V to +3.6V, f
RF
= 300MHz to 450MHz, T
A
=
-40°C to +125°C, unless otherwise noted. Typical values are at PAV
DD
= AV
DD
= DV
DD
= HV
IN
= +2.7V, T
A
= +25°C, unless otherwise
noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
GENERAL CHARACTERISTICS
Frequency Range 300 450 MHz
Maximum Input Level P
RFIN
0dBm
f
RF
= 315MHz (Note 6) 32
Transmit Efficiency 100% Duty
Cycle
f
RF
= 434MHz (Note 6) 30
%
f
RF
= 315MHz (Note 6) 24
Transmit Efficiency 50% Duty
Cycle
f
RF
= 434MHz (Note 6) 22
%
ENABLE or T/R transition low to high,
transmitter frequency settled to within
50kHz of the desired carrier
200
ENABLE or T/R transition low to high,
transmitter frequency settled to within 5kHz
of the desired carrier
350
Power-On Time t
ON
ENABLE transition low to high, or T/R
transition high to low receiver startup time
(Note 5)
250
µs
RECEIVER
ASK (315MHz) -114
ASK (434MHz) -113
FSK (315MHz) -110
Sensitivity
0.2% BER, 4kbps
Manchester data rate,
280kHz IF BW, ±50kHz
FSK deviation,
average power
FSK (434MHz) -107
dBm
Image Rejection (Note 8) 46 dB