Datasheet

MAX1472
300MHz-to-450MHz Low-Power,
Crystal-Based ASK Transmitter
4
Typical Operating Characteristics
(Typical Application Circuit , V
DD
= 2.7V, T
A
= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX1472 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
3.22.4 2.8
6
7
8
9
10
11
12
13
5
2.0 3.6
V
ENABLE
= V
IH
,
V
DATA
= V
IH
,
f
RF
= 315MHz
-40°C
+25°C
+85°C
+125°C
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX1472 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
3.22.82.4
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0 3.6
+85°C
+125°C
-40°C
+25°C
V
ENABLE
= V
IH
,
V
DATA
= V
IL
,
f
RF
= 315MHz
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX1472 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
3.22.82.4
7
8
9
10
11
12
13
6
5
2.0 3.6
V
ENABLE
= V
IH
,
V
DATA
= V
IH
,
f
RF
= 433MHz
+25°C
-40°C
+125°C
+85°C
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX1472 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
3.22.82.4
1.2
1.4
1.6
1.8
2.0
2.2
2.0 3.6
+125°C
-40°C
V
ENABLE
= V
IH
,
V
DATA
= V
IL
,
f
RF
= 433MHz
+85°C
+25°C
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX1472 toc05
SUPPLY VOLTAGE (V)
OUTPUT POWER (dBm)
3.22.4 2.8
6
7
8
9
10
11
12
13
14
5
2.0 3.6
V
ENABLE
= V
IH
,
V
DATA
= V
IH
,
f
RF
= 315MHz
-40
°
C
-25
°
C
+85
°
C
+125
°
C
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX1472 toc06
SUPPLY VOLTAGE (V)
OUTPUT POWER (dBm)
3.22.4 2.8
6
7
8
9
10
11
12
13
14
2.0 3.6
V
ENABLE
= V
IH
,
V
DATA
= V
IH
,
f
RF
= 433MHz
-40
°
C
+25
°
C
+85
°
C
+125
°
C
REFERENCE SPUR MAGNITUDE
vs. SUPPLY VOLTAGE
MAX1472 toc07
SUPPLY VOLTAGE (V)
REFERENCE SPUR (dBc)
3.22.82.4
-83
-81
-79
-77
-75
-73
-71
-69
-67
-65
-85
2.0 3.6
315MHz
433MHz
FREQUENCY STABILITY
vs. SUPPLY VOLTAGE
MAX1472 toc08
SUPPLY VOLTAGE (V)
OFFSET FREQUENCY (ppm)
3.22.82.4
-3
-2
-1
0
1
2
-4
2.0 3.6
433MHz
315MHz
TRANSMIT POWER EFFICIENCY
vs. SUPPLY VOLTAGE
MAX1472 toc09
SUPPLY VOLTAGE (V)
EFFICIENCY (%)
3.22.82.4
30
35
40
45
50
55
25
2.0 3.6
+25
°
C
+85°C
+125°C
-40
°
C
CW OUTPUT
f
RF
= 315MHz