OPA698M Datasheet, PDF (14/32 Pages) Texas Instruments – UNITY-GAIN STABLE WIDEBAND VOLTAGE LIMITING AMPLIFIER

OPA698M
SGLS287A – MAY 2005 – REVISED MARCH 2006
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TYPICAL APPLICATIONS (continued)
for each supply consists of two capacitors: one electrolytic 2.2 µF and one ceramic 0.1 µF. The supply bypass
capacitors are shown explicitly in Figure 47 and Figure 48, but is assumed in the other figures. An additional
0.01-µF power-supply decoupling capacitor (not shown here) can be included between the two power-supply
pins. In practical PC board layouts; this optional-added capacitor typically improves the 2^nd harmonic distortion
performance by 3 dB to 6 dB.
+V_S = +5V
3.01kΩ 1.91kΩ
2.2µF ^0.1µF
0.1µF
V_H = +2V
174Ω
37
V_IN
8 ^IVH
49.9Ω
OPA698 ⁶
R_G
402Ω
2
R_F
4
402Ω
5 _IVL
V_O
500Ω
0.1µF
0.1µF
V_L = -2V
-V_S = -5V
2.2µF
3.01kΩ 1.91kΩ
S0035-01
Figure 47. DC-Coupled, Dual-Supply Amplifier
V_S = +5V
2.2µF
0.1µF
0.1µF
806Ω
0.1µF
37
I_VH
V_IN
8
57.6Ω
806Ω _OPA698 6
2
4
5
I_VL
R_F
402Ω
R_G
402Ω
0.1µF
0.1µF
523Ω
V_H = 3.7V
976Ω
0.1µF
V_O
500Ω
V_L = 1.3V
523Ω
S0036-01
Figure 48. AC-Coupled, Single-Supply Amplifier
Single Supply, Noninverting Amplifier
Figure 48 shows an ac-coupled, noninverting gain amplifier for single +5-V supply operation. This circuit was
used for ac characterization of the OPA698, with a 50-Ω source (which it matches) and a 500-Ω load. The
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