6.3.5 Full-Power Bandwidth Improved

The full-power bandwidth curve has been a staple in data sheets for decades. The full-power bandwidth of an op

amp provides some indication about where designers can expect slew-induced distortion on a signal of a given

amplitude and frequency. The full-power bandwidth curve is generated using Equation 2.

FPBW= SR

2πVOUT_MAX

(2)

Figure 6-3 shows the full-power bandwidth of the OPAx596. The curve is a good reference for designers

that need to achieve high-voltage, high-frequency output swings with little concern for distortion performance.

Unfortunately, the curve provides little indication of the true distortion at any given point on the curve. The

full-power bandwidth curve is, after all, only a theoretical value and slew-induced distortion appears gradually

as the output nears the maximum rate of change. Furthermore, slew-induced distortion is only one of several

sources of op-amp distortion. Therefore, the curve is a decent starting point, but not a reliable source for

distortion performance.

Figure 6-4 shows the full power bandwidth in terms of total harmonic distortion (THD) performance for the

OPAx596. This curve provides a better indication of the level of distortion that a designer can expect for a signal

of a given amplitude and frequency. For example, the OPAx596 can achieve approximately −100dB or better

of THD at 70VPP up to approximately 1kHz. As a second example, the OPAx596 can achieve approximately

−130dB or better of THD at 10VPP up to about 1kHz. As a result of limitations in measurement bandwidth, only

20kHz data are recorded.

Frequency (Hz)

0

10

20

30

40

50

60

70

80

90

100

110

1

10

100

1k

10k

100k

1M

10M

VS= 42.5V

VS= 4V

Figure 6-3. Full-Power Bandwidth

Figure 6-4. Full-Power Bandwidth Improved

6.4 Device Functional Modes

The OPAx596 has a single functional mode and is operational when the power-supply voltage is between 8V

(±4V) and 85V (±42.5V).

OPA596, OPA2596

SBOSA42B – JUNE 2024 – REVISED DECEMBER 2025

www.ti.com

18

Submit Document Feedback

Copyright © 2025 Texas Instruments Incorporated

Product Folder Links: OPA596 OPA2596