Additional single-supply applications ideas can be found in the LM358 data sheet. The LMC66x is pin-for-pin compatible with the LM358 and offers greater bandwidth and input resistance over the LM358. These features can improve the performance of many existing single-supply applications. Be aware, however, that the supply voltage range of the LM662 is smaller than that of the LM358.

Figure 6-6 Low Leakage Sample and Hold

Figure 6-7 Instrumentation Amplifier

Use low drift resistors for good CMRR performance over temperature. Matching of R3 to R6 and R4 to R7 affects CMRR. Gain can be adjusted through R2. CMRR can be adjusted through R7. An improved circuit can be designed using the RES11A-Q1, low drift, precision matched resistor pairs. A precise gain of 99 is easily implemented as shown in Figure 6-8.

Figure 6-8 Improved Instrumentation Amplifier With the RES11A

Oscillator frequency is determined by R1, R2, C1, and C2:

f_OSC = 1/2πRC

where R = R1 = R2 and C = C1 = C2.

Figure 6-9 Sine-Wave Oscillator

This circuit, as shown, oscillates at 2.0kHz with a peak-to-peak output swing of 4.5V.

Figure 6-10 1Hz Square-Wave Oscillator

Figure 6-11 Power Amplifier

fO = 10Hz, Q = 2.1, gain = −8.8

Figure 6-12 10Hz Band-Pass Filter

fc = 10Hz, d = 0.895, gain = 1, 2dB pass-band ripple

Figure 6-13 10Hz High-Pass Filter

Figure 6-14 1Hz Low Pass Filter
(Maximally Flat, Dual Supply Only)

Gain = −46.8 Output offset voltage reduced to the level of the input offset voltage of the bottom amplifier (typically 1mV).

Figure 6-15 High Gain Amplifier with
Offset Voltage Reduction