AD515 Analog Devices, AD515 Datasheet
AD515
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AD515 Summary of contents
Page 1
... This feature will also shield the input circuitry from external noise and supply transients. The AD515A is available in three versions of bias current and offset voltage, the “J”, “K” and “L”; all are specified for rated performance from +70 C and supplied in a hermetically sealed TO-99 package ...
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... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD515A features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
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... AD515A can deliver. The best performance will be realized by using a teflon IC socket for the AD515A minimum a teflon standoff should be used for the high impedance lead. If this is not feasible, the input guarding scheme shown in Figure 1 will minimize leakage as much as possible ...
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... AD515A COAXIAL CABLE AND CAPACITANCE EFFECTS not possible to attach the AD515A virtually on top of the signal source, considerable care should be exercised in designing the connecting lines carrying the high impedance signal. Shielded coaxial cable must be used for noise reduction, but use of coaxial cables for high impedance work can add problems from cable leakage, noise and capacitance ...
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... V to 1.5 V above the other terminal. Input current limits under these conditions. AD515A CIRCUIT APPLICATION NOTES The AD515A is quite simple to apply to a wide variety of applications because of the pretrimmed offset voltage and internal compensation, which minimize required external components and eliminate the need for adjustments to the device itself ...
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... AD515A the total noise by about 40%. Noise currents driving the resistors also add, but in the AD515A are significant only above 10 Figure 11. Very High Impedance Instrumentation Amplifier Figure 12. Low Drift Integrator and Low Leakage Guarded Reset LOW LEVEL CURRENT-TO-VOLTAGE CONVERTERS Figure 2 shows a standard low level current-to-voltage converter. ...