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-2.5 V

+2.5 V

Copyright © 2016, Texas Instruments Incorporated

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LM7301

SNOS879I – AUGUST 1999 – REVISED MAY 2016

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Copyright © 1999–2016, Texas Instruments Incorporated

7 Detailed Description

7.1 Overview

Low supply current, wide bandwidth, input common mode voltage range that includes both rails, rail-to-rail

output, good capacitive load driving ability, wide supply voltage (1.8 V to 32 V), and low distortion all make the

LM7301 ideal for many diverse applications.

The high common-mode rejection ratio and full rail-to-rail input range provides precision performance when

operated in noninverting applications where the common-mode error is added directly to the other system errors.

7.2 Feature Description

7.2.1 Capacitive Load Driving

The LM7301 has the ability to drive large capacitive loads. For example, 1000 pF only reduces the phase margin

to about 25°.

7.2.2 Transient Response

The LM7301 offers a very clean, well-behaved transient response. Figure 19, Figure 20, Figure 22, and

Figure 23 show the response when operated at gains of +1 and

−1 when handling both small and large signals.

The large phase margin, typically 70° to 80°, assures clean and symmetrical response. In the large signal scope

photos, Figure 19 and Figure 22, the input signal is set to 4.8 V. The output goes to within 100 mV of the

supplies cleanly and without overshoot. In the small signal samples, the response is clean, with only slight

overshoot when used as a follower. Figure 21 and Figure 24 are the circuits used to make these photos.

Figure 19. AV = –1 V/V, Large Signal Behavior (1 V/div,

2 µs/div)

Figure 20. AV = –1 V/V, Small Signal Behavior (0.2 V/div,

100 µs/div)

Figure 21. AV = –1 V/V Schematic