The topology chosen for the LMC66x, shown in Figure 6-1, is unconventional compared to general-purpose op amps. The LMC66x incorporates novel op amp design that enables a wide input common-mode range and rail to rail output swing even when driving a large load. The input common-mode range includes ground, making the LMC66x an excellent choice for single supply applications. While the LMC66x supports both a wide supply and common-mode voltage range, large input common-mode voltage can cause an increase in input bias current.

Figure 6-1 LMC66x Circuit Topology (Each Amplifier)

The large signal voltage gain while sourcing is comparable to traditional bipolar op amps, even with a 600Ω load. The gain while sinking is higher than most CMOS op amps, due to the additional gain stage; however, under heavy load (600Ω) the gain is reduced as indicated in the Electrical Characteristics.