am422 AME, Inc., am422 Datasheet - Page 3

• Manufacturer Part Number: am422
• Description: Voltage/current Converter - Analog Microelectronics
• Manufacturer: AME, Inc.

VOLTAGE/CURRENT CONVERTER
* In 2–wire operation a maximum current of I
Currents flowing into the IC are negative
BOUNDARY CONDITIONS
analog microelectronics
Parameter
V/I Converter
Internal Gain
Trim Range
Voltage Range at R
Offset Voltage
V
Output Offset Current
I
Output Offset Current
I
Output Control Current
I
Output Voltage Range
Output Current Range FS
Output Resistance
Load Capacitance
Protection Functions
Voltage Limitation at R
Temperature Limitation
Protection against reverse polarity
Current in case of reverse polarity
System Parameters
Nonlinearity
Parameter
Sense Resistor
Stabilisation Resistor
Load Resistance
Sum Offset Resistors
V
Output Capacitance
D
T
OUTOS
OUTOS
OUTC
OS
1
REF
1
Forward Current Gain
Breakdown Voltage
vs. Temperature
Capacitance
vs. Temperature
vs. Temperature
vs. Temperature
0
FS
0
G
V
V
dV
I
dI
I
dI
I
dI
V
V
I
R
C
V
V
T
OUTOS
OUTOS
OUTC
OUTFS
LIMIT
R0
OS
OUT
OUT
OUT
LIMR0
LIMR0
L
VI
OUTOS
OUTOS
OUTC
Symbol
OS
Symbol
FS
R
/dT
3
V
R
R
R
R
R
C
C
β
OUTmin
/dT
+ R
BR
F
/dT
/dT
0
0
5
5
L
1
2
4
– I
adjustable by R
β
β
3–wire operation
3–wire operation
2–wire operation
2–wire operation
2–wire operation, V
2–wire operation
V
V
I
V
V
Ground vs. V
Ground = 35V, V
ideal input
CC
I
c = 20mA/I
I
c = 20mA/I
limitation only for 3–wire operation
only for 2–wire operation
OUT
OUTFS
OUTFS
F
F
OUT
OUT
R0
IN
≥ 100
≥ 100
= 0, V
is valid
= V
= V
= R
= R
= 20mA
= 20mA
IN
R0
L
L
/2, SET = V
R0
I
I
/R
OUT
OUT
OUTFS
OUTFS
= V
Conditions
0
S
Conditions
, 3–wire operation
vs. I
, V
, V
0
SET
S
CC
CC
/2 – V
= I
OUT
R0
< 16V
≥ 16V
REF
/100mV
OUT
/2
REF
= 0
/2
Min.
c ⋅ 20
c ⋅ 35
0.75
Min.
400
580
580
110
0.5
1.9
20
35
20
90
35
50
0
0
0
0
Typ.
1.00
1.00
0.05
c ⋅ 25
c ⋅ 40
Typ.
500
–35
635
640
130
1.0
3.8
150
±2
±7
55
14
22
–9
20
100
2.2
25
40
50
5
V
Max.
CC
Max.
c ⋅ 29
c ⋅ 45
AM422
1.25
0.15
±20
580
–50
500
690
700
150
±6
500
200
250
80
22
35
10
35
5.0
29
45
– 6
April 99
µV/°C
nA/°C
nA/°C
nA/°C
Unit
%FS
Unit
MΩ
mV
mV
mV
mV
mA
mA
µA
µA
µA
kΩ
nF
°C
µF
nF
V
V
V
Ω
Ω
Ω
Ω
Ω
V
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