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参数资料
| 型号： | AM457 |
| 厂商： | AME, Inc. |
| 英文描述： | Precision amplifier for bridge circuits |
| 中文描述： | 精密放大器电路的桥梁 |
| 文件页数： | 5/10页 |
| 文件大小： | 271K |
| 代理商： | AM457 |
Precision amplifier for bridge circuits
AM457
analog microelectronics
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Internet: www.analogmicro.de
May 2005
Phone: +49 (0)6131/91 073 – 0
Fax:
+49 (0)6131/91 073 – 30
Email:
info@analogmicro
.
de
5/10
Rev. 2.2
Error Monitoring (Diagnosis)
Output Voltage on Error (high)
V
DIAG
V
DIAG
VCC
– 0.2
V
Output Voltage without Error (low)
GND+
0.2
V
Output Current on Error
I
ERR
V
DIAG
= 2.5V
1.5
3.5
6
μA
Output Current without Error
I
NOERR
V
DIAG
= 2.5V
-6
-3.5
-1.5
μA
Threshold for
Temperature
Error Monitor-
ing
T
ERR
105
143
°C
Threshold for Output Current (AMP) Error
Monitoring
I
IA,ERR
250
800
μA
Threshold for Supply Voltage Error
Monitoring
V
CC,ERR
3.8
4.3
V
Threshold for High Input Voltage (AMP)
Error Monitoring
V
IN,high,ERR
With regard to the sensing element
VCC
– 1.8
VCC
– 0.8
V
Threshold for Low Input Voltage (AMP)
Error Monitoring
V
IN,low,ERR
0.4
0.9
V
Operational Amplifier (OP)
Offset Voltage
V
OS
±
4
±
8
mV
V
OS
vs. Temperature
d
V
OS
/d
T
T
amb
= -45…105°C
±
10
±
40
μV/°C
V
OS
vs. Temperature
d
V
OS
/d
T
T
amb
= 105…125°C
±
320
300
μV
Input Bias Current
I
B
80
nA
I
B
vs. Temperature
d
I
B
/d
T
T
amb
= -45…125°C
100
400
pA/°C
Input Resistance
R
IN
V
CM
/
I
B,typ
(
V
CM
= 0.5V)
6.25
M
Input Capacitance
C
IN
30
pF
Common Mode Input Range
CMIR
0
0.5
1
V
Open Loop Gain
G
0
I
0ut
=0.1mA
90
110
dB
G
0.2mA
I
0ut
=2mA
75
90
dB
Output Voltage Range
V
OUT
I
OUT
0
VCC
– 0.2
V
Output Source Current
PNP Open Collector Output
2
mA
Output Load Capacitance
C
1
1
5
nF
Gain Bandwidth Product
GBW
G
GAIN
= 10;
C
1
= 1nF;
R
L
= 1.25k
G
GAIN
= 100;
C
1
= 1nF;
R
L
= 25k
0.9
1.4
MHz
Slew Rate
SR
0.2
0.7
V/μs
Table 1:
Specifications
Currents flowing into the IC are negative. Positive input of the o
perational amplifier (fixed internally): 0.1
V
CC
V
CM
Input Common Mode Voltage
CIRCUIT
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
AMP Output Capacitor
C
1
1
5
nF
Compensation Capacitor
C
2
100
pF
DIAG
Output Capacitor (optional)
C
3
3.3
nF
OP Output Capacitor (optional)
C
4
1
5
nF
Stabilization Capacitor (optional)
C
5
100
nF
EMV Protection Capacitor (optional)
C
6
470
pF
Load Resistor
R
L
20
k
Table 2
:
Circuit Components
Recommendation: Ceramic capacitor
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