INA213CIRSWR datasheet(15/50 Pages) TI2

15 / 50 page

With the adjustment factor from Equation 1, including the device internal input resistance, this factor varies with

each gain version, as shown in Table 6-1. Each individual device gain error factor is shown in Table 6-2.

Table 6-1. Input Resistance

PRODUCT

GAIN

RINT (kΩ)

INA210

200

INA211

500

INA212

1000

INA213

INA214

100

INA215

13.3

Table 6-2. Device Gain Error Factor

PRODUCT

SIMPLIFIED GAIN ERROR FACTOR

INA210

1000

+ 1000

INA211

10,000

(13

+ 10,000

INA212

5000

+ 5000

INA213

20,000

(17

+ 20,000

INA214

10,000

+ 10,000

INA215

8,000

(7 RS) + 8,000

The gain error that can be expected from the addition of the external series resistors can then be calculated

based on Equation 2:

Gain Error (%) = 100

(100

Gain Error Factor)

(2)

For example, using an INA212 and the corresponding gain error equation from Table 6-2, 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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INA210, INA211, INA212, INA213, INA214, INA215

SBOS437K – MAY 2008 – REVISED NOVEMBER 2023

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Product Folder Links: INA210 INA211 INA212 INA213 INA214 INA215

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