R

S

A1

0.1 F

m

V+>3V

A2

R

L

Load

V

IN+

-

16Vto+80V

Negative

and

Positive

Common-Mode

Voltage

V

IN+

V

IN-

V+

I

L

OUT

INA193-INA198

R

1

R

2

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

0

2

4

6

8

10

12

14

16

18

20

22

V

(mV)

SENSE

24

INA195,INA198V

TestedLimit

OUT

(1)

V

CM2

V

CM3

V

CM4

V

,V

,andV

CM2

CM3

CM4 illustratethevariance

fromparttopartoftheV

thatcancause

CM

maximumV

OUT

SENSE

withV

<20mV.

V

testedlimitat

OUT

V

=0mV,0

V

£

SENSE

CM1

S

V

£

.

Ideal

VCM1

20

INA193, INA194, INA195

INA196, INA197, INA198

SBOS307G – MAY 2004 – REVISED JANUARY 2015

www.ti.com

Product Folder Links: INA193 INA194 INA195 INA196 INA197 INA198

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Copyright © 2004–2015, Texas Instruments Incorporated

Device Functional Modes (continued)

(1) INA193, INA196 VOUT Tested Limit = 0.4V. INA194, INA197 VOUT Tested Limit = 1V.

Figure 27. Example for Low VSENSE Case 2 (INA195, INA198: Gain = 100)

8.4.3 Shutdown

Because the INA193-INA198 devices consume a quiescent current less than 1 mA, they can be powered by

either the output of logic gates or by transistor switches to supply power. Use a totem-pole output buffer or gate

that can provide sufficient drive along with 0.1-μF bypass capacitor, preferably ceramic with good high-frequency

characteristics. This gate should have a supply voltage of 3 V or greater because the INA193-INA198 devices

require a minimum supply greater than 2.7 V. In addition to eliminating quiescent current, this gate also turns off

the 10-μA bias current present at each of the inputs. An example shutdown circuit is shown in Figure 28.

Figure 28. INA193-INA198 Example Shutdown Circuit