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The variation of the ATE-DMG¹s voltage and current offsets as a function of source, time and temperature are tabulated in the static specifications table. These may be used to calculate the output effect by the relationship:
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-DMG STATIC SPECIFICATIONS
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INFLUENCE QUANTITY
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OUTPUT EFFECTS
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OFFSETS
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VOLTAGE MODE
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CURRENT MODE
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TYPICAL |
MAXIMUM
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TYPICAL |
MAXIMUM
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ΔEio |
ΔIio |
Source (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 |
<2nA |
Ripple and Noise (Slow Mode) (2) |
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 (Fast Mode) (2) |
rms |
<1mV |
3mV |
<0.01% IO max. |
0.03% IO max. |
--- |
--- |
p-p (3) |
<10mV |
30mV |
<0.1% IO max. |
0.3% IO max. |
--- |
--- |
(1)
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For IO >50A: load effect = 2mA typ., 5mA max. In slow mode the output capacitor adds 0 to 6 mA to current mode load effect.
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(2)
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One terminal grounded so that common mode current does not flow through the load or current sense resistor.
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(3)
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BW: 20Hz - 10MHz
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