Rainbow Electronics DS1870 - Manual (Page 6)

DS1870
LDMOS RF Power-Amplifier Bias
Controller
6 _____________________________________________________________________
Typical Operating Characteristics
(V
CC
= +5.0V, T
A
= +25°C, unless otherwise noted.)
POTENTIOMETER 1 AND 2 OUTPUT VOLTAGE
vs. POSITON
DS1870 toc04
WIPER POSITION (DEC)
WIPER VOLTAGE (V)
192 128 64
1
2
3
4
5
6
0
0 256
H COM = 5V
L1 AND L2
NOT CONNECTED
POTENTIOMETER 1 DIFFERENTIAL
NONLINEARITY vs. WIPER POSITION
DS1870 toc05
WIPER POSITION (DEC)
DIFFERENTIAL NONLINEARITY (LSB)
192 128 64
-0.20
-0.15
-0.10
-0.05
0
0.05
0.10
0.15
0.20
0.25
-0.25
0 256
POTENTIOMETER 2 DIFFERENTIAL
NONLINEARITY vs. WIPER POSITION
DS1870 toc06
WIPER POSITION (DEC)
DIFFERENTIAL NONLINEARITY (LSB)
192 128 64
-0.20
-0.15
-0.10
-0.05
0
0.05
0.10
0.15
0.20
0.25
-0.25
0 256
POTENTIOMETER 1 INTEGRAL
NONLINEARITY vs. WIPER POSITION
DS1870 toc07
WIPER POSITION (DEC)
INTEGRAL NONLINEARITY (LSB)
192 128 64
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
0 256
POTENTIOMETER 2 INTEGRAL
NONLINEARITY vs. WIPER POSITION
DS1870 toc08
WIPER POSITION (DEC)
INTEGRAL NONLINEARITY (LSB)
192 128 64
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
0 256
POTENTIOMETER 1 AND 2
WIPER RESISTANCE vs. WIPER VOLTAGE
DS1870 toc09
WIPER VOLTAGE (V)
WIPER RESISTANCE (
Ω
)
4 3 2 1
100
200
300
400
500
600
700
800
900
1000
0
0 5
H COM = 5.0V
SUPPLY CURRENT vs. SUPPLY VOLTAGE
DS1870 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5.3 5.1 4.9 4.7
620
640
660
680
700
720
740
760
780
800
600
4.5 5.5
SUPPLY CURRENT vs. TEMPERATURE
DS1870 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
80 60 20 40 0 -20
450
500
550
600
650
700
750
800
850
900
400
-40 100
V CC = 5.5V
V CC = 4.5V
V CC = 5.0V
H
COM
CURRENT vs. H
COM
VOLTAGE
DS1870 toc03
H
COM
VOLTAGE (V)
H
COM
CURRENT (mA)
5.3 5.1 4.9 4.7
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
0.45
0.50
0
4.5 5.5