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AM457 Datasheet(PDF) 5 Page - Analog Microelectronics

Part # AM457
Description  Precision amplifier for bridge circuits
PDF  10 Pages
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Manufacturer  AME [Analog Microelectronics]
Direct Link  http://www.ame.com.tw/
Logo AME - Analog Microelectronics

AM457 Datasheet(HTML) 5 Page - Analog Microelectronics

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Precision amplifier for bridge circuits
AM457
analog microelectronics
May 2005
Analog Microelectronics GmbH
Phone: +49 (0)6131/91 073 – 0
5/10
An der Fahrt 13, D – 55124 Mainz
Fax:
+49 (0)6131/91 073 – 30
Rev. 2.2
Internet: www.analogmicro.de
Email:
info@analogmicro.de
Error Monitoring (Diagnosis)
Output Voltage on Error (high)
VDIAG
VCC – 0.2
V
Output Voltage without Error (low)
VDIAG
GND+ 0.2
V
Output Current on Error
IERR
VDIAG = 2.5V
1.5
3.5
6
µA
Output Current without Error
INOERR
VDIAG = 2.5V
-6
-3.5
-1.5
µA
Threshold for Temperature Error Monitor-
ing
TERR
105
143
°C
Threshold for Output Current (AMP) Error
Monitoring
IIA,ERR
250
800
µA
Threshold for Supply Voltage Error
Monitoring
VCC,ERR
3.8
4.3
V
Threshold for High Input Voltage (AMP)
Error Monitoring
VIN,high,ERR
With regard to the sensing element
VCC – 1.8
VCC – 0.8
V
Threshold for Low Input Voltage (AMP)
Error Monitoring
VIN,low,ERR
0.4
0.9
V
Operational Amplifier (OP)
Offset Voltage
VOS
±4
±8
mV
VOS vs. Temperature
dVOS/dT
Tamb= -45…105°C
±10
±40
µV/°C
VOS vs. Temperature
dVOS/dT
Tamb= 105…125°C
±320
µV
Input Bias Current
IB
80
300
nA
IB vs. Temperature
dIB/dT
Tamb= -45…125°C
100
400
pA/°C
Input Resistance
RIN
VCM / IB,typ (VCM = 0.5V)
6.25
M
Ω
Input Capacitance
CIN
30
pF
Common Mode Input Range
CMIR
0
0.5
1
V
Open Loop Gain
G0
I0ut =0.1mA
90
110
dB
G0.2mA
I0ut =2mA
75
90
dB
Output Voltage Range
VOUT
0
VCC – 0.2
V
Output Source Current
IOUT
PNP Open Collector Output
2
mA
Output Load Capacitance
C1
1
5
nF
Gain Bandwidth Product
GBW
GGAIN = 10; C1 = 1nF; RL = 1.25kΩ
0.9
1.4
MHz
Slew Rate
SR
GGAIN = 100; C1 = 1nF; RL = 25kΩ
0.2
0.7
V/µs
Table 1: Specifications
Currents flowing into the IC are negative. Positive input of the operational amplifier (fixed internally): 0.1⋅VCC
VCM Input Common Mode Voltage
CIRCUIT
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
AMP Output Capacitor
C1
1
5
nF
Compensation Capacitor
C2
100
pF
DIAG Output Capacitor (optional)
C3
3.3
nF
OP Output Capacitor (optional)
C4
1
5
nF
Stabilization Capacitor (optional)
C5
100
nF
EMV Protection Capacitor (optional)
C6
470
pF
Load Resistor
RL
20
k
Ω
Table 2: Circuit Components
Recommendation: Ceramic capacitor



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