Datasheet

TLV2760, TLV2761, TLV2762, TLV2763, TLV2764, TLV2765
FAMILY OF 1.8 V MICROPOWER RAIL-TO-RAIL INPUT/OUTPUT
OPERATIONAL AMPLIFIERS WITH SHUTDOWN
SLOS326F − JUNE 2000 − REVISED AUGUST 2013
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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
than 10 pF, it is recommended that a resistor be placed in series (R
NULL
) with the output of the amplifier, as
shown in Figure 31. A minimum value of 20 Ω should work well for most applications.
C
LOAD
R
F
Input
Output
R
G
R
NULL
+
−
V
DD
/2
Figure 31. Driving a Capacitive Load
offset voltage
The output offset voltage, (V
OO
) is the sum of the input offset voltage (V
IO
) and both input bias currents (I
IB
) times
the corresponding gains. The following schematic and formula can be used to calculate the output offset
voltage:
V
OO
+ V
IO
ǒ
1 ) ǒ
R
F
R
G
Ǔ
Ǔ
" I
IB)
R
S
ǒ
1 ) ǒ
R
F
R
G
Ǔ
Ǔ
" I
IB–
R
F
+
−
V
I
+
R
G
R
S
R
F
I
IB−
V
O
I
IB+
Figure 32. Output Offset Voltage Model
general configurations
When receiving low-level signals, limiting the bandwidth of the incoming signals into the system is often
required. The simplest way to accomplish this is to place an RC filter at the noninverting terminal of the amplifier
(see Figure 33).