INA159 datasheet(6/50 Pages) TI2

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INA821

SBOS893D – AUGUST 2018 – REVISED JUNE 2020

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(1)

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

(2)

Offset drifts are uncorrelated. Input-referred offset drift is calculated using: ΔVOS(RTI) = √[ΔVOSI

2 + (ΔV

OSO / G)

2].

(3)

Specified by characterization.

(4)

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

voltage, gain, and reference voltage. See Typical Characteristic curves Figure 51 through Figure 54 for more information.

(5)

Total RTI voltage noise is equal to: eN(RTI) = √[eNI

2 + (e

NO / G)

2].

7.5 Electrical Characteristics

at TA = 25°C, VS = ±15 V, RL = 10 kΩ, VREF = 0 V, and G = 1 (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

INPUT

VOSI

Input stage offset

voltage(1)(2)

INA821ID,

INA821DRG

µV

INA821IDGK

TA = –40°C to +125°C

(3)

INA821ID,

INA821DRG

INA821IDGK

vs temperature, TA = –40°C to +125°C

0.1

0.4

µV/°C

VOSO

Output stage offset

voltage(1)(2)

INA821ID,

INA821DGK

350

µV

INA821DRG

400

TA = –40°C to +125°C

(3)

850

vs temperature, TA = –40°C to +125°C

µV/°C

PSRR

Power-supply rejection

ratio

G = 1, RTI

110

120

G = 10, RTI

114

130

G = 100, RTI

130

135

G = 1000, RTI

136

140

zid

Differential impedance

100 || 1

GΩ || pF

zic

Common-mode

impedance

100 || 7

Ω || pF

RFI filter, –3-dB

frequency

MHz

VCM

Operating input range(4)

(V–) + 2

(V+) – 2

VS = ±2.25 V to ±18 V, TA = –40°C to +125°C

See Figure 51 to Figure 54

Input overvoltage range

TA = –40°C to +125°C

(3)

±40

CMRR

Common-mode rejection

ratio

At DC to 60 Hz, RTI, VCM = (V–) + 2 V to (V+) – 2 V,

G = 1

105

At DC to 60 Hz, RTI, VCM = (V–) + 2 V to (V+) – 2 V,

G = 10

112

125

At DC to 60 Hz, RTI, VCM = (V–) + 2 V to (V+) – 2 V,

G = 100

132

145

At DC to 60 Hz, RTI, VCM = (V–) + 2 V to (V+) – 2 V,

G = 1000

140

150

BIAS CURRENT

Input bias current

VCM = VS / 2

0.15

0.5

TA = –40°C to +125°C

IOS

Input offset current

VCM = VS / 2

0.15

0.5

TA = –40°C to +125°C

NOISE VOLTAGE

eNI

Input stage voltage

noise(5)

f = 1 kHz, G = 100, RS = 0 Ω

nV/

√Hz

fB = 0.1 Hz to 10 Hz, G = 100, RS = 0 Ω

0.14

µVPP

eNO

Output stage voltage

noise(5)

f = 1 kHz, RS = 0 Ω

nV/

√Hz

fB = 0.1 Hz to 10 Hz, RS = 0 Ω

2.5

µVPP

Noise current

f = 1 kHz

130

fA/

√Hz

fB = 0.1 Hz to 10 Hz, G = 100

4.7

pAPP

GAIN

Gain equation

1 + (49.4 k

Ω / RG)

V/V

Range of gain

10000

V/V

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