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PDF AM457 Data sheet ( Hoja de datos )
| Número de pieza | AM457 | |
| Descripción | Precision amplifier | |
| Fabricantes | Analog Microelectronics | |
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Precision amplifier for bridge circuits
AM457
PRINCIPLE FUNCTION
Adjustable amplification of differential voltage signals (±5 to ±100mV FS)
to an adjustable, ratiometric output voltage of between
0.2 and Vcc-0.2Volt with a diagnostic unit
VCC = 5V ± 5%
Differential input
voltages
( 5... 100mV FS)
AM457
Iout = 2mA
TYPICAL APPLICATIONS
• Precision amplifiers for bridge circuits with
low sensitivity:
for ceramic measurement cells
for DMS sensing elements
for GMR sensing elements
• Sensor amplification with functional control
Diagnostic unit
e.g. VOUT = 0.2...VCC-0.2V
(adjustable)
e.g. 0.5...4.5V
ratiometric
analog microelectronics
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Internet: www.analogmicro.de
Phone: +49 (0)6131/91 073 – 0
Fax: +49 (0)6131/91 073 – 30
Email: info@analogmicro.de
May 2005
1/10
Rev. 2.2
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
Precision amplifier for bridge circuits
AM457
Error Monitoring (Diagnosis)
Output Voltage on Error (high)
Output Voltage without Error (low)
Output Current on Error
Output Current without Error
Threshold for Temperature Error Monitor-
ing
VDIAG
VDIAG
IERR
INOERR
TERR
VDIAG = 2.5V
VDIAG = 2.5V
VCC – 0.2
GND+ 0.2
1.5 3.5
-6 -3.5
105
Threshold for Output Current (AMP) Error IIA,ERR
Monitoring
250
Threshold for Supply Voltage Error
Monitoring
VCC,ERR
3.8
Threshold for High Input Voltage (AMP) VIN,high,ERR With regard to the sensing element VCC – 1.8
Error Monitoring
Threshold for Low Input Voltage (AMP)
Error Monitoring
VIN,low,ERR
0.4
Operational Amplifier (OP)
Offset Voltage
VOS vs. Temperature
VOS vs. Temperature
Input Bias Current
IB vs. Temperature
Input Resistance
Input Capacitance
Common Mode Input Range
VOS
dVOS/dT
dVOS/dT
IB
dIB/dT
RIN
CIN
CMIR
Tamb= -45…105°C
Tamb= 105…125°C
Tamb= -45…125°C
VCM / IB,typ (VCM = 0.5V)
±4
±10
80
100
6.25
30
0 0.5
Open Loop Gain
Output Voltage Range
Output Source Current
Output Load Capacitance
Gain Bandwidth Product
Slew Rate
G0
G0.2mA
VOUT
IOUT
C1
GBW
SR
I0ut =0.1mA
I0ut =2mA
PNP Open Collector Output
GGAIN = 10; C1 = 1nF; RL = 1.25kΩ
GGAIN = 100; C1 = 1nF; RL = 25kΩ
90
75
0
1
0.9
0.2
110
90
1.4
0.7
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
6
-1.5
143
800
4.3
VCC – 0.8
0.9
±8
±40
±320
300
400
1
VCC – 0.2
2
5
V
V
µA
µA
°C
µA
V
V
V
mV
µV/°C
µV
nA
pA/°C
MΩ
pF
V
dB
dB
V
mA
nF
MHz
V/µs
CIRCUIT
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
AMP Output Capacitor
Compensation Capacitor
DIAG Output Capacitor (optional)
OP Output Capacitor (optional)
Stabilization Capacitor (optional)
EMV Protection Capacitor (optional)
Load Resistor
C1
C2
C3
C4
C5
C6
RL
1 5 nF
100 pF
3.3 nF
1 5 nF
100 nF
470 pF
20 kΩ
Table 2: Circuit Components
Recommendation: Ceramic capacitor
analog microelectronics
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Internet: www.analogmicro.de
Phone: +49 (0)6131/91 073 – 0
Fax: +49 (0)6131/91 073 – 30
Email: info@analogmicro.de
May 2005
5/10
Rev. 2.2
Datasheet pdf - http://www.DataSheet4U.net/
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet AM457.PDF ] | |
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