Datasheet

Gain Error (%) = 100 (100 Gain Error Factor)- ´
8,000
(7 R
S
) + 8,000
x
10,000
(9 R + 10,000´
S
)
20,000
(17 R + 20,000´
S
)
5000
(9 R + 5000´
S
)
10,000
(13 R + 10,000´
S
)
1000
R + 1000
S
INA210 , INA211 , INA212 , INA213 , INA214 , INA215
www.ti.com SBOS437F –MAY 2008–REVISED JUNE 2014
Device Functional Modes (continued)
With the adjustment factor equation including the device internal input resistance, this factor varies with each
gain version, as shown in Table 1. Each individual device gain error factor is shown in Table 2.
Table 1. Input Resistance
PRODUCT GAIN R
INT
(kΩ)
INA210 200 5
INA211 500 2
INA212 1000 1
INA213 50 20
INA214 100 10
INA215 75 13.3
Table 2. Device Gain Error Factor
PRODUCT SIMPLIFIED GAIN ERROR FACTOR
INA210
INA211
INA212
INA213
INA214
INA215
The gain error that can be expected from the addition of the external series resistors can then be calculated
based on Equation 2:
(2)
For example, using an INA212 and the corresponding gain error equation from Table 2, a series resistance of
10 Ω results in a gain error factor of 0.982. The corresponding gain error is then calculated using Equation 2,
resulting in a gain error of approximately 1.77% solely because of the external 10-Ω series resistors. Using an
INA213 with the same 10-Ω series resistor results in a gain error factor of 0.991 and a gain error of 0.84% again
solely because of these external resistors.
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Product Folder Links: INA210 INA211 INA212 INA213 INA214 INA215