User guide

MAX7032
Low-Cost, Crystal-Based, Programmable,
ASK/FSK Transceiver with Fractional-N PLL
4 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS (continued)
(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
POWER AMPLIFIER
T
A
= +25°C (Note 4) 4.6 10.0 15.5
T
A
= +125°C, AV
DD
= DV
DD
= HV
IN
=
PAV
DD
= +2.1V (Note 2)
3.9 6.7
Output Power P
OUT
T
A
= -40°C, AV
DD
= DV
DD
= HV
IN
=
PAV
DD
= +3.6V (Note 4)
13.1 15.8
dBm
Modulation Depth 82 dB
Maximum Carrier Harmonics With output-matching network -40 dBc
Reference Spur -50 dBc
PHASE-LOCKED LOOP
Transmit VCO Gain K
VCO
340 MHz/V
10kHz offset, 200kHz loop BW -68
Transmit PLL Phase Noise
1MHz offset, 200kHz loop BW -98
dBc/Hz
Receive VCO Gain 340 MHz/V
10kHz offset, 500kHz loop BW -80
Receive PLL Phase Noise
1MHz offset, 500kHz loop BW -90
dBc/Hz
Transmit PLL 200
Loop Bandwidth
Receive PLL 500
kHz
Minimum Transmit Frequency
Step
f
XTAL
/
4096
kHz
Reference Frequency Input Level 0.5 V
P-P
Programmable Divider Range In transmit mode (Note 4) 20 27
LOW-NOISE AMPLIFIER/MIXER (Note 9)
f
RF
= 315MHz 1 - j4.7
LNA Input Impedance Z
INLNA
Normalized to
50Ω
f
RF
= 434MHz 1 - j3.3
f
RF
= 315MHz 50
High-gain state
f
RF
= 434MHz 45
f
RF
= 315MHz 13
Voltage-Conversion Gain
Low-gain state
f
RF
= 434MHz 9
dB
High-gain state -42
Input-Referred 3rd-Order
Intercept Point
IIP3
Low-gain state -6
dBm
Mixer Output Impedance 330 Ω
LO Signal Feedthrough to
Antenna
-100 dBm
RSSI
Input Impedance 330 Ω
Operating Frequency f
IF
10.7 MHz
3dB Bandwidth 10 MHz