Rainbow Electronics MAX7044 User Manual
Page 2
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
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 (Note 8)
t
ON
Oscillator settled to within 5kHz
450
µs
f
RF
= 315MHz
48
Transmit Efficiency with CW
(Notes 5, 10)
f
RF
= 433MHz
47
%
f
RF
= 315MHz
43
Transmit Efficiency with 50%
OOK (Notes 3, 10)
f
RF
= 433MHz
41
%