INA321

INA2321

SBOS168B − DECEMBER 2000 − REVISED JULY 2004

www.ti.com

3

At TA = +25°C, RL = 25kΩ, G = 25, and IA common = VS/2, unless otherwise noted.

INA321E

INA321EA

INA2321EA

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

INPUT

Input Offset Voltage, RTI

VS = +5V

±0.2

±0.5

∗

1

mV

Over Temperature

VOS

±2.2

2.5

mV

vs Temperature

dVOS/dT

±7

*

µV/°C

vs Power Supply

PSRR

VS = +2.7V to +5.5V

±50

±200

∗

∗

µV/V

Over Temperature

±220

*

µV/V

Long-Term Stability

±0.4

∗

µV/month

Input Impedance

1013 || 3

∗

Ω || pF

Input Common-Mode Range

VS = 2.7V

0.35

1.5

∗

∗

V

VS = 5V

0.55

3.8

∗

∗

V

Common-Mode

Rejection

CMRR

VS = 5V, VCM = 0.55V to 3.8V

90

94

80

∗

dB

Over Temperature

VS = 5V, VCM = 0.55V to 3.8V

77

75

dB

VS = 2.7V, VCM = 0.35V to 1.5V

94

∗

dB

Crosstalk, Dual

110

∗

dB

INPUT BIAS CURRENT

Bias Current

IB

±0.5

±10

∗

∗

pA

Offset Current

IOS

±0.5

±10

∗

∗

pA

NOISE, RTI

en

RS = 0Ω

Voltage Noise: f = 10Hz

500

∗

nV/

√Hz

f = 100Hz

190

∗

nV/

√Hz

f = 1kHz

100

∗

nV/

√Hz

f = 0.1Hz to 10Hz

20

∗

µVPP

Current Noise: f = 1kHz

3

∗

fA/

√Hz

GAIN(1)

Gain Equation, Externally Set

G > 5

G = 5 + 5 (R2/R1)

∗

Range of Gain

5

1000

∗

∗

V/V

Gain Error

±0.02

±0.1

∗

∗

%

vs Temperature

G = 5

±2

±10

*

*

ppm/

°C

Nonlinearity

G = 25, VS = 5V, VO = 0.05 to 4.95

±0.001

±0.010

∗

∗

% of FS

Over Temperature

±0.002

±0.015

*

*

% of FS

OUTPUT

Output Voltage Swing from Rail(2, 5)

G

≥ 10

50

25

∗

∗

mV

Over Temperature

50

*

mV

Capacitance Load Drive

See Typical Characteristic(3)

∗

pF

Short-Circuit Current

+ISC

8

−ISC

16

∗

mA

NOTE:

∗ Specification is same as INA321E.

(1) Does not include errors from external gain setting resistors.

(2) Output voltage swings are measured between the output and power-supply rails.

(3) See typical characteristic Percent Overshoot vs Load Capacitance.

(4) See typical characteristic Shutdown Voltage vs Supply Voltage.

(5) Output does not swing to positive rail if gain is less than 10.