TLV9042IDDFR datasheet(21/54 Pages) TI

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resistor connected in parallel with the capacitive load. The voltage divider introduces a gain error at the output

that reduces the output swing.

load

out

iso

-V

Figure 8-1. Improving Capacitive Load Drive

8.3.6 Overload Recovery

Overload recovery is defined as the time required for the operational amplifier output to recover from a saturated

state to a linear state. The output devices of the operational amplifier enter a saturation region when the output

voltage exceeds the rated operating voltage, because of the high input voltage or high gain. Once one of the

output devices enters the saturation region, the output stage requires additional time to return to the linear

operating state which is referred to as overload recovery time. After the output stage returns to its linear

operating state, the amplifier begins to slew at the specified slew rate. Therefore, the propagation delay (in case

of an overload condition) is the sum of the overload recovery time and the slew time. The overload recovery time

for the TLV904x family is approximately 13-µs typical.

8.3.7 EMI Rejection

The TLV904x uses integrated electromagnetic interference (EMI) filtering to reduce the effects of EMI from

sources such as wireless communications and densely-populated boards with a mix of analog signal chain and

digital components. EMI immunity can be improved with circuit design techniques; the TLV904x benefits from

these design improvements. Texas Instruments has developed the ability to accurately measure and quantify the

immunity of an operational amplifier over a broad frequency spectrum extending from 10 MHz to 6 GHz. Figure

8-2 shows the results of this testing on the TLV904x. Table 8-1 shows the EMIRR IN+ values for the TLV904x at

particular frequencies commonly encountered in real-world applications. The EMI Rejection Ratio of Operational

Amplifiers application report contains detailed information on the topic of EMIRR performance as it relates to op

amps and is available for download from www.ti.com.

Frequency (Hz)

100

10M

100M

D42_

Figure 8-2. EMIRR Testing

www.ti.com

TLV9042, TLV9044

SBOS836B – MARCH 2020 – REVISED DECEMBER 2020

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TLV9042IDDFR Datasheet(PDF) 21 Page - Texas Instruments