RATIOMETRIC VOLTAGE TRANSMITTER
Parameter
Voltage Output Stage (cont.)
Output Current
Output Current Pin
VOUT
Current Limitation Threshold
V
THRESH
vs. Temperature
Output Resistance
Linearity
I
OUT
I
VOUT
V
THRESH
dV
THRESH
/dT
R
OUT
with transistor BCW68H
pin
VOUT
V
THRESH
=
V
VCC
–
V
VOUTmin
,
R
2
= 27Ω,
I
OUT
≈
14mA
–40...+100°C
virtual
ideal input
100
120
1.00
0.1
200
150
Symbol
Conditions
Min.
Typ.
AM417
Max.
Unit
12.5
300
180
1.15
0.85
0.01
mA
µA
mV
mV
Ω
%FS
BOUNDARY CONDITIONS
Parameter
Resistor Adjustment Current Source (Transducer)
Gain Resistor Sum
Capacitor Power Supply
Capacitor Frequency Compensation (Output Stage)
Capacitor Load (Output Stage)
Resistor Sense Current Limitation
Symbol
R
1
R
3
+
R
4
C
1
C
2
C
3
R
2
100
4.3
1.0
0
5.8
10.0
50
Conditions
Min.
400
Typ.
Max.
1000
2.0
Unit
Ω
kΩ
nF
nF
nF
Ω
FUNCTIONAL DIAGRAM
I
BR
V
S
(ratriometrical)
GAIN
= 20...110
AMP
V
OUT
Ground
Figure 2
analog microelectronics
April 99
3/6
AME [ ANALOG MICROELECTRONICS ]
