INA821 datasheet(9/28 Pages) TI

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7.5 Electrical Characteristics (continued)

at TA = 25°C, VS = ±15 V, VICM = VOCM = mid-supply, VCLAMP+ = VS+, VCLAMP– = VS–, RL = 10 kΩ, and G = 1 (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

OUTPUT CLAMPING

VCLAMP+ Positive clamp voltage(9)

RL = 2 kΩ, TA = –40°C to +125°C

No output clamping

VS+

Output clamp enabled

VS+ – 1.5

VCLAMP– Negative clamp voltage(9) RL = 2 kΩ, TA = –40°C to +125°C

No output clamping

VS–

Output clamp enabled

VS– + 1.5

ΔVCLAMP Clamp voltage(9)

ΔVCLAMP = (VCLAMP+) – (VCLAMP–), output clamp enabled

Rejection ratio, VCLAMP±

pins to VOUT

TBD

Fail-safe current VCLAMP+ VS+ = VS– = 0 V, VCLAMP+ = 10 V

POWER SUPPLY

ICLAMP+

Positive clamp current

VCLAMP+ ≤ VS+ – 1.5 V

–80

–60

µA

ICLAMP–

Negative clamp current

VCLAMP– ≥ VS– + 1.5 V

µA

Quiescent current

VIN = 0 V

TA = –40°C to +125°C

(1)

Total offset, referred-to-input (RTI): VOS = (VOSI) + (VOSO / G).

(2)

Specified by design.

(3)

Specified by characterization.

(4)

Offset drifts are uncorrelated. Input-referred offset drift is calculated using: ΔVOS(RTI) = √[ΔVOSI 2 + (ΔVOSO / G)2].

(5)

Input voltage range of the instrumentation amplifier input stage. The input range depends on the common-mode voltage, differential

voltage, gain, and VOCM.

(6)

The values specified for G > 1 do not include the effects of the external gain-setting resistor, RG.

(7)

Total RTI voltage noise is equal to: eN(RTI) = √[eNI 2 + (eNO / G)2].

(8)

See Typical Characteristics.

(9)

See detailed explanation in the Output Clamping section.

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SBOS999 – MARCH 2022

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