TLV2401, TLV2402, TLV2404

FAMILY OF 880-nA/Ch RAIL-TO-RAIL INPUT/OUTPUT

OPERATIONAL AMPLIFIERS WITH REVERSE BATTERY PROTECTION

SLOS244B – FEBRUARY 2000 – REVISED NOVEMBER 2000

13

POST OFFICE BOX 655303

APPLICATION INFORMATION

reverse battery protection

The TLV2401/2/4 are protected against reverse battery voltage up to 18 V. When subjected to reverse battery

condition the supply current is typically less than 100 nA at 25

°C (inputs grounded and outputs open). This

current is determined by the leakage of 6 Schottky diodes and will therefore increase as the ambient

temperature increases.

When subjected to reverse battery conditions and negative voltages applied to the inputs or outputs, the input

ESD structure will turn on—this current should be limited to less than 10 mA. If the inputs or outputs are referred

to ground, rather than midrail, no extra precautions need be taken.

common-mode input range

differential pair will provide the gain.

provide the gain. This special combination of NPN/PNP differential pair enables the inputs to be taken 5 V above

as diodes. This will lead to an increase in input bias current. The second PNP differential pair continues to

The TLV2401/2/4 has a negative common-input range that exceeds ground by 100 mV. If the inputs are taken

much below this, reduced open loop gain will be observed with the ultimate possibility of phase inversion.

offset voltage

the corresponding gains. The following schematic and formula can be used to calculate the output offset

voltage:

V

OO +

V

IO

1

)

R

F

R

G

" I

IB

)

R

S

1

)

R

F

R

G

" I

IB–

R

F

+

–

VI

+

RG

RS

RF

IIB–

VO

IIB+

Figure 37. Output Offset Voltage Model