Additional single-supply applications ideas are found in the LM358 data sheet. The LMC603x 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, the supply voltage range of the LMC603x is smaller than that of the LM358.

Figure 6-6 Instrumentation Amplifier

If R1 = R5, R3 = R6, and R4 = R7, then A_V = 100 for circuit shown.

Use low-drift resistors for good CMRR performance over temperature. Matching of R3 to R6 and R4 to R7 affects CMRR. Gain is adjusted through R2. CMRR is adjusted through R7. An improved circuit can be designed using the RES11A-Q1, low-drift, precision, matched resistor pairs. Figure 6-7 shows how a precise gain of 99 is easily implemented. The capacitors are optional and are be used to improve noise performance, if needed.

Figure 6-7 Improved Instrumentation Amplifier With RES11A

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

f_OSC = 1/2πRC

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

Figure 6-8 Sine-Wave Oscillator

This circuit, as shown, oscillates at 2.0kHz with a peak-to-peak output swing of 4.0V.

Figure 6-9 Low-Leakage Sample-and-Hold

Figure 6-11 Power Amplifier

Figure 6-13 1Hz Low-Pass Filter (Maximally Flat, Dual Supply Only)

Figure 6-10 1Hz Square-Wave Oscillator

fO = 10Hz, Q = 2.1, gain = −8.8

Figure 6-12 10Hz Bandpass Filter

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

Figure 6-14 10Hz High-Pass Filter

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