Rainbow Electronics DS1870 - Manual (Page 7)

DS1870
LDMOS RF Power-Amplifier Bias
Controller
_____________________________________________________________________ 7
Typical Operating Characteristics (continued)
(V
CC
= +5.0V, T
A
= +25°C, unless otherwise noted.)
OUTPUT DRIFT (PPM/C)
-15
-10
-5
0
5
10
15
20
-20
POTENTIOMETER LOW TERMINAL VOLTAGE
vs. TEMPERATURE
DS1870 toc12
TEMPERATURE (°C)
80 60 -20 0 20 40 -40 100
L1
L2
H COM = 5.0V
V CC CONVERSION ERROR
vs. SUPPLY VOLTAGE
DS1870 toc13
SUPPLY VOLTAGE (V)
ERROR (% FS)
5.0 4.5 4.0 3.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
3.0 5.5
DEFAULT V CC
CALIBRATION
VD CONVERSION ERROR
vs. INPUT VOLTAGE
DS1870 toc14
INPUT VOLTAGE (V)
ERROR (% FS)
2.0 1.5 1.0 0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
0 2.5
DEFAULT VD
CALIBRATION
ID1 CONVERSION ERROR
vs. INPUT VOLTAGE
DS1870 toc15
INPUT VOLTAGE (V)
ERROR (% FS)
0.4 0.3 0.2 0.1
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
0 0.5
DEFAULT ID1
CALIBRATION
ID2 CONVERSION ERROR
vs. INPUT VOLTAGE
DS1870 toc16
INPUT VOLTAGE (V)
ERROR (% FS)
0.4 0.3 0.2 0.1
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
0 0.5
DEFAULT ID2
CALIBRATION
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
POTENTIOMETER 1 AND 2
WIPER RESISTANCE vs. TEMPERATURE
DS1870 toc10
TEMPERATURE (°C)
RESISTANCE CHANGE FROM 25
°
C (PPM/C)
80 60 20 40 0 -20
100
200
300
400
500
600
700
800
900
1000
0
-40 100
H COM = 5V
WIPER VOLTAGE = 4V
POTENTIOMETER END-TO-END RESISTANCE
vs. TEMPERATURE
DS1870 toc11
TEMPERATURE (°C)
CHANGE FROM RESISTANCE AT 25
°
C (PPM/C)
80 60 -20 0 20 40
-150
-100
-50
0
50
100
150
200
-200
-40 100
R POT2 + R S2
R POT1 + R S1