TLV2460-Q1_16 Datasheet, PDF (26/46 Pages) Texas Instruments – Low-Power Rail-to-Rail Input/Output Operational Amplifiers

TLV2460-Q1, TLV2460A-Q1, TLV2461-Q1, TLV2461A-Q1
TLV2462-Q1, TLV2462A-Q1, TLV2463-Q1, TLV2463A-Q1, TLV2464A-Q1
SGLS008F – MARCH 2003 – REVISED DECEMBER 2015
10.2 Typical Application
C1
C3
330 pF
R3
4.7 k
C2
680 pF
33 pF
R2
47 kŸ
VCC
VIN
R1
6
U1B
62 NŸ
7
VCC/2 5
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OUT
GND
Figure 55. Typical Operational Amplifier Application
10.2.1 Design Requirements
See Table 2 for Design Requirements.
Table 2. Recommended Design Parameters
PARAMETER
Supply voltage
Reference voltage
Input voltage
Capacitors
Resistors
VALUE
5V
2.5 V
2.5 VDC and maximum ripple 40 mV peak-to-
peak
Better than X5R
Better than 2% tolerance
10.2.2 Detailed Design Procedure
The following is the detailed design procedure. See Equation 2 for the Type 3 compensation gain.
(1 R2C2s) (1 (R1 R3)C3s)
Type 3 Compensation Gain =
R1(C1
C2)s(1
R2
C1C2 _s)(1
R3Cs)
C1 C2
(2)
Type 3 compensation poles and zeros are shown in the ideal asymptotic graph, see Figure 56. They can be
moved around by changing the values of the resistors and capacitors according to the compensation
requirement. The operational amplifier cannot achieve the ideal case, because of its open-loop gain and phase
limitation.
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