TLV2780, TLV2781, TLV2782, TLV2783, TLV2784, TLV2785, TLV278xA

FAMILY OF 1.8 V HIGHSPEED RAILTORAIL INPUT/OUTPUT

OPERATIONAL AMPLIFIERS WITH SHUTDOWN

SLOS245E − MARCH 2000 − REVISED JANUARY 2005

13

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PARAMETER MEASUREMENT INFORMATION

_

+

RNULL

RL

CL

Figure 29

APPLICATION INFORMATION

driving a capacitive load

When the amplifier is configured in this manner, capacitive loading directly on the output will decrease the

device’s phase margin leading to high frequency ringing or oscillations. Therefore, for capacitive loads of greater

shown in Figure 30.

CL

RF

Input

Output

RG

RNULL

+

−

RL

CL

RF

Input

Output

RG

RNULL

+

−

RL

Snubber

C

(a)

(b)

Figure 30. Driving a Capacitive Load

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 31. Output Offset Voltage Model