OPA607 datasheet(24/50 Pages) TI1

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VS+

VS±

VIN+

Power Sup ply

ESD Cell

VIN±

300 A

ICLAMP

OPA810

SBOS799A – AUGUST 2019 – REVISED DECEMBER 2019

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Feature Description (continued)

8.3.2 ESD Protection

As Figure 61 shows, all device pins are protected with internal ESD protection diodes to the power supplies.

These diodes provide moderate protection to input overdrive voltages above the supplies. The protection diodes

can typically support 10-mA continuous input and output currents. The differential input clamps only limit the bias

current when the input common-mode voltages are within the supply voltage range, whereas current-limiting

series resistors must be added at the inputs if common-mode voltages higher than the supply voltages are

possible. Keep these resistor values as low as possible because using high values degrades noise performance

and frequency response.

Figure 61. Internal ESD Protection

8.4 Device Functional Modes

8.4.1 Split-Supply Operation (±2.375 V to ±13.5 V)

To facilitate testing with common lab equipment, the OPA810 can be configured to allow for split-supply

operation (see the OPA2810DGK Evaluation Module user guide). This configuration eases lab testing because

the mid-point between the power rails is ground, and most signal generators, network analyzers, oscilloscopes,

spectrum analyzers, and other lab equipment reference the inputs and outputs to ground. Figure 62 depicts the

OPA810 configured as a noninverting amplifier and Figure 63 illustrates the OPA810 configured as an inverting

amplifier. For split-supply operation referenced to ground, the power supplies VS+ and VS- are symmetrical around

ground and VREF is at GND. Split-supply operation is preferred in systems where the signals swing around

ground because of the ease-of-use; however, the system requires two supply rails.

8.4.2 Single-Supply Operation (4.75 V to 27 V)

Many newer systems use a single power supply to improve efficiency and reduce the cost of the extra power

supply. The OPA810 can be used with a single supply (with the negative supply set to ground) with no change in

performance if the input and output are biased within the linear operation of the device. To change the circuit

from split supply to a balanced, single-supply configuration, level shift all voltages by half the difference between

the power-supply rails. An additional advantage of configuring an amplifier for single-supply operation is that the

effects of PSRR are minimized because the low-supply rail is grounded. See the Single-Supply Op Amp Design

Techniques application report for examples of single-supply designs.

OPA607 Datasheet(PDF) 24 Page - Texas Instruments