am457 AME, Inc., am457 Datasheet
am457
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am457 Summary of contents
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... Sensor amplification with functional control analog microelectronics Analog Microelectronics GmbH An der Fahrt 13, D – 55124 Mainz Internet: www.analogmicro. ± CC AM457 e. 2mA out Phone: +49 (0)6131/91 073 – 0 Fax: +49 (0)6131/91 073 – 30 Email: info@analogmicro.de AM457 Diagnostic unit = 0.2...V -0.2V OUT CC (adjustable) e.g. 0.5...4.5V ratiometric May 2005 1/10 Rev. 2.2 ...
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... Table 1: Specifications Table 2: Circuit Table 3: Pin configuration Figure 1: Block diagram Figure 2: Schematic circuit diagram for resistance bridges with low sensitivity Figure 3: Block diagram of AM457 Figure 4: AM457 Pin out Figure 5 : SOP 8 Package dimensions analog microelectronics Analog Microelectronics GmbH An der Fahrt 13, D – 55124 Mainz Internet: www ...
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... AMP can be operated independently of the OP, for example. The functionality of both component groups (AMP and OP) is autonomous with regard to the diagnostic unit. AM457 is a combination of high-impedance precision amplifier, additional OP and extensive diagnostic unit, enabling a self-monitoring sensor system to be assembled using very few components. ...
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... L Including filters for EMC protection G ^ 100 C = 1nF 20k ; amb Source Impedance Phone: +49 (0)6131/91 073 – 0 Fax: +49 (0)6131/91 073 – 30 Email: info@analogmicro.de AM457 Min. Typ. Max. Unit 4.5 5 5.5 V 1.5 2.5 mA -45 125 °C -55 150 °C 150 °C 111 °C/W 181 ° ...
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... C = 1nF 25k: GAIN 1 L perational amplifier (fixed internally): 0.1˜V Symbol Conditions Recommendation: Ceramic capacitor Phone: +49 (0)6131/91 073 – 0 Fax: +49 (0)6131/91 073 – 30 Email: info@analogmicro.de AM457 VCC – 0.2 V GND+ 0.2 V 1.5 3.5 6 µA -6 -3.5 -1.5 µA 105 143 °C 250 800 µA 3.8 4.3 V VCC – ...
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... Besides amplifying and conditioning signals the IC can also display a range of system errors ("system" in this context refers to the sensor bridge and the IC plus the voltage supply). AM457 works on the principle of ratiometry with a supply voltage of 5V r5%. ...
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... To compensate for or calibrate the offset and span and to amplify the signal as necessary a network was developed (see Figure 2) for a four-resistor resistance bridge circuit (such as a DMS sensing element, for example) consisting of the resistance bridge, an AM457 IC, four resistors and a maximum of six capacitors (see [1]). AM457's characteristics define the network and the IC amplifies the bridge output signal to the required output values ...
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... In order to calculate the discrete adjusting resistors R resistance of the sensing element to be calibrated are first determined. The sensing element is then connected AM457 to form the circuit illustrated in Figure 2. The resistors are dimensioned and applied according to the given formulae. The values of the capacitors are selected according to Table 1 ...
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... Precision amplifier for bridge circuits BLOCK DIAGRAM AND PINOUT AM457 7 OUTOP 3 IN+ AMP 2 IN- 6 Figure 3: Block diagram of AM457 PIN NAME EXPLANATION 1 OUT Output AMP 2 IN- Negative Input AMP 3 IN+ Positive Input AMP GND 4 IC Ground 5 DIAG Output Diagnosis 6 INOP Negative Input OP ...
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... Figure 5: SOP 8 package dimensions FURTHER READING www.analogmicro.de [1] Application notes AN1011: the AM457 amplifier IC for DMS sensing elements [2] Application notes AN1012: the AM457 amplifier IC for ceramic sensing elements analog microelectronics Analog Microelectronics GmbH An der Fahrt 13, D – 55124 Mainz Internet: www.analogmicro. ...