Datasheet
MAX7044
300MHz to 450MHz High-Efficiency,
Crystal-Based +13dBm ASK Transmitter
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(
Typical Application Circuit
, all RF inputs and outputs are referenced to 50Ω, V
DD
= +2.1V to +3.6V, T
A
= -40°C to +125°C, unless
otherwise noted. Typical values are at V
DD
= +2.7V, T
A
= +25°C, unless otherwise noted.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
DD
to GND ..........................................................-0.3V to +4.0V
All Other Pins to GND ................................-0.3V to (V
DD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range .............................-60°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SYSTEM PERFORMANCE
Supply Voltage V
DD
2.1 3.6 V
V
DATA
at 50% duty
cycle, (Notes 3, 4)
7.7 14.1
PA on (Note 5) 13.8 25.4
f
RF
= 315MHz
PA off (Note 6) 1.7 2.8
V
DATA
at 50% duty
cycle, (Notes 3, 4)
8.0 14.4
PA on (Note 5) 14.0 25.7
Supply Current
(Note 2)
I
DD
f
RF
= 433MHz
PA off (Note 6) 1.9 3.1
mA
T
A
< +25°C 40 130
Standby Current I
STDBY
V
DATA
< V
IL
for
more than WAIT
time (Notes 4, 7)
T
A
< +125°C 550 2900
nA
Frequency Range (Note 4) f
RF
300 450 MHz
Data Rate (Note 4) 0 100 kbps
Modulation Depth (Note 8) ON to OFF P
OUT
ratio 90 dB
T
A
= +25° C, V
DD
=
+2.7V
9.6 12.5 15.4
T
A
= +125°C, V
DD
=
+2.1V
5.9 9.0 12.0
Output Power, PA On
(Notes 4, 5)
P
OUT
f
RF
= 300MHz to
450MHz
T
A
= -40°C, V
DD
=
+3.6V
13.1 15.8 18.5
dBm
Oscillator settled to within 50kHz 220
Turn-On Time t
ON
Oscillator settled to within 5kHz 450
µs
f
RF
= 315MHz 48
Transmit Efficiency with CW
(Notes 5, 9)
f
RF
= 433MHz 47
%
f
RF
= 315MHz 43
Transmit Efficiency with 50%
OOK (Notes 3, 9)
f
RF
= 433MHz 41
%