RATIOMETRISCHES TRANSMITTER–IC
Parameter
Voltage Output Stage (cont.)
Offset Voltage
V
OS
vs. Temperature
Input Current
Input Current Pin
RSC
Output Voltage Range
Output Current
Output Current Pin
VOUT
Current Limitation Threshold
Output Resistance
Linearity
Current Source – Output
Internal Sense Voltage
Input Sense Current
Output Current
Output Current
Output Voltage Range
V
RIC
I
RIC
I
VIC
I
OUT
V
OUT
with transistor BC848C
with transistor BC848C,
I
OUT
= 5mA
0.8
20
ratiometric with
VCC
485
500
25
35
V
OS
dV
OS
/dT
I
IN
I
RSC
V
OUT
I
OUT
I
VOUT
V
THRESH
R
OUT
∆V
IN
= 50mV
∆V
IN
= 50mV
V
RSC
=
V
VCC
– 150mV
with transistor BCW68H
I
OUT
= 10mA (see figure 5)
with transistor BCW68H
pin
VOUT
ratiometric with
VCC
virtual
ideal input
100
120
200
150
0.1
8.0
0.5
20
12.5
Symbol
Conditions
Min.
Typ.
AM427
Max.
Unit
±3.0
±15
75
25.0
4.5
12.5
300
180
0.85
0.01
mV
µV/°C
nA
µA
V
mA
µA
mV
Ω
%FS
515
75
75
6
6
mV
nA
µA
mA
V
RANDBEDINGUNGEN
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
Resistor Adjustment Current Source (Output Stage)
Symbol
R
1
R
3
+
R
4
C
1
C
2
C
3
R
2
R
5
100
4.3
1.0
0
90
5.8
10.0
50
1000
Conditions
Min.
400
Typ.
Max.
1000
2.0
Unit
Ω
kΩ
nF
nF
nF
Ω
Ω
FUNKTIONSDIAGRAMM
V
S
I
BR
COMP
(ratriometrisch)
12 V
GAIN
= 20...110
AMP
V
OUT
Ground
Abbildung 2
analog microelectronics
April 99
3/9
AME [ ANALOG MICROELECTRONICS ]
