TLV6001 Datasheet, PDF (17/36 Pages) Texas Instruments – Low-Power, Rail-to-Rail In/Out, 1-MHz Operational Amplifier for Cost-Sensitive Systems

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TLV6001, TLV6002, TLV6004
SBOS779A – JUNE 2016 – REVISED JUNE 2016
Typical Application (continued)
When the desired gain is determined, choose a value for R_I or R_F. Choosing a value in the kilohm range is
desirable for general-purpose applications because the amplifier circuit uses currents in the milliamp range. This
milliamp current range ensures the device does not draw too much current. The trade-off is that very large
resistors (100s of kilohms) draw the smallest current but generate the highest noise. Very small resistors (100s of
ohms) generate low noise but draw high current. This example uses 10 kΩ for R_I, meaning 36 kΩ is used for R_F.
The values are determined by Equation 3:
A_V
R_F
R_I
(3)
9.2.3 Application Curve
2
Input
1.5
Output
1
0.5
0
-0.5
-1
-1.5
-2
Time
Figure 22. Inverting Amplifier Input and Output
9.3 System Examples
When receiving low-level signals, limiting the bandwidth of the incoming signals into the system is often required.
The simplest way to establish this limited bandwidth is to place an RC filter at the noninverting terminal of the
amplifier, as shown in Figure 23.
R_G
R_F
R₁
V_IN
V_OUT
C₁
f_{-3 dB} =
1
2pR₁C₁
( ( ^VOUT
V_IN
=
1
+
R_F
R_G
1
1 + sR₁C₁
Figure 23. Single-Pole Low-Pass Filter
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