Eo= ±Er
(Rf/Ri)±Eio(1+Rf/Ri)±Iio(Rf) where Rf is the feedback resistor, and Ri is the input resistor from the reference, Er.The tabulated offsets, more particularly their change as a function of source, time and temperature, allow a user to calculate performance of the uncommitted amplifier(s) with user specified input and feedback components. The formula for this is given above.
| ATE STATIC SPECIFICATIONS | |||||||
| INFLUENCE QUANTITY | OUTPUT EFFECTS |
PREAMPLIFIER OFFSETS |
|||||
| VOLTAGE MODE | CURRENT MODE | ||||||
| TYPICAL | MAXIMUM | TYPICAL | MAXIMUM | ΔEio | ΔIio | ||
| Source Voltage (min.-max.) | <0.0005% EO max | 0.001% EO max | <0.002% IO max | 0.005% IO max | <1μV | <1nA | |
| Load (no load-full load) | <0.001% EO max | 0.002% EO max | <0.5mA (1) | 1mA (1) | --- | --- | |
| Time (8-hour drift) | <0.005% EO max | 0.01% EO max | <0.01% IO max | 0.02% IO max | <20μV | <1nA | |
| Temperature, per °C | <0.005% EO max | 0.01% EO max | <0.01% IO max | 0.02% IO max | <20μV | <1nA | |
| Ripple and Noise (2) (Slow Mode) |
rms | <0.1mV | 0.3mV | <0.01% IO max | 0.03% IO max | --- | --- |
| p-p (3) | <1mV | 3mV | <0.1% IO max | 0.3% IO max | --- | --- | |
| Ripple and Noise (2) (Fast Mode) |
rms | <1mV | 3mV (4) | <0.01% IO max | 0.03% IO max | --- | --- |
| p-p (3) | <10mV | 30mV (4) | <0.1% IO max | 0.3% IO max | --- | --- | |
| (1) | For IO50A, load effect = 2mA typ., 5mA max. In slow mode the output capacitor adds 0 to 6mA to current mode load effect. |
| (2) | One terminal grounded so that the common mode current does not flow throught the load or current-sense resistor. |
| (3) | Bandwidth: 20Hz to 10MHz. |
| (4) | For high voltage ATE 325-0.8M, the maximum output ripple and noise is 10mV rms and 50mV p-p. |
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