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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:
DELTAEo= ±DELTAEr (Rf/RiDELTAEio(1+Rf/RiDELTAIio(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
INFLUENCE QUANTITY OUTPUT EFFECTS OFFSETS
VOLTAGE MODE CURRENT MODE
TYPICAL MAXIMUM TYPICAL MAXIMUM 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) 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.
(2) One terminal grounded so that common mode current does not flow through the load or current sense resistor.
(3) BW: 20Hz - 10MHz

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