3 .6 V, 1 W RF P o w e r Tra n s is t o rs
fo r 9 0 0 MHz Ap p lic a t io n s
1/MAX602
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(Test Circuit of Figure 1, input/output matching networks optimized for specific measurement frequency, V = 3.6V, V = 0.750V,
CC
BB
P
= 30dBm, Z
= Z
= 50Ω, f = 836MHz, T = +25°C, unless otherwise noted.)
OUT
LOAD
SOURCE
A
TWO-TONE OUTPUT POWER, IM3, IM5
vs. INPUT POWER
TWO-TONE OUTPUT POWER AND IM3
COLLECTOR CURRENT
vs. COLLECTOR CURRENT
1.0
0.8
0.6
0.4
0.2
0
35
25
15
5
31
P
, IM3, AND IM5
OUT
P
, IM3, AND IM5
OUT
P
OUT
ARE RMS COMPOSITE
TWO-TONE POWER
LEVELS
ARE RMS COMPOSITE
TWO-TONE POWER LEVELS
P
V
= 1.00V
OUT
BB
30
29
28
27
V
BB
= 0.95V
IM3
V
= 0.90V
BB
IM3
IM5
V
= 0.85V
3
BB
V
BB
= 0.80V
5
-5
0
1
2
4
6
5
10
15
INPUT POWER (dBm)
20
25
0.4
0.5
0.6
(A)
0.7
0.8
V
CE
(V)
I
CC
ACPR vs. OUTPUT POWER
(IS-54 π/4 DQPSK MODULATION, V = 0.85V)
COLLECTOR EFFICIENCY vs. OUTPUT POWER
(IS-54 π/4 DQPSK MODULATION, V = 0.85V)
TWO-TONE OUTPUT POWER, IM3, IM5
vs. INPUT POWER (f = 433MHz)
BB
BB
-20
60
50
40
30
20
10
0
35
25
15
5
P , IM3, AND IM5
OUT
P
OUT
3.0V
-22
-24
-26
ARE RMS COMPOSITE
TWO-TONE POWER
LEVELS
3.0V
3.6V
P
, IM3, AND IM5
OUT
IM3
-28
-30
-32
-34
-36
-38
-40
ARE RMS COMPOSITE
TWO-TONE
POWER LEVELS
3.6V
4.2V
4.2V
IM5
4.8V
4.8V
-5
10
15
20
25
30
35
10
15
20
25
30
35
5
10
15
INPUT POWER (dBm)
20
25
OUTPUT POWER (dBm)
OUTPUT POWER (dBm)
______________________________________________________________P in De s c rip t io n
PIN
NAME
FUNCTION
MAX2601
MAX2602
1, 8
1, 8
C
E
Transistor Collector
Transistor Emitter
2, 3, 6, 7, Slug
2, 6, 7, Slug
Anode of the Biasing Diode that matches the thermal and process char-
acteristics of the power transistor. Requires a high-RF-impedance, low-
DC-impedance (e.g., inductor) connection to the transistor base (Pin 4).
Current through the biasing diode (into Pin 3) is proportional to 1/15 the
collector current in the transistor.
—
3
BIAS
B
4, 5
4, 5
Transistor Base
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
