V

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V

OUT

V+

R

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10

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20

W

W

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L

Device

16

TLV316-Q1, TLV2316-Q1, TLV4316-Q1

SBOS845B – NOVEMBER 2016 – REVISED AUGUST 2017

www.ti.com

Product Folder Links: TLV316-Q1 TLV2316-Q1 TLV4316-Q1

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Copyright © 2016–2017, Texas Instruments Incorporated

Feature Description (continued)

One technique for increasing the capacitive load drive capability of the amplifier operating in a unity-gain

configuration is to insert a small resistor (typically 10-Ω to 20-Ω) in series with the output, as shown in Figure 14.

This resistor significantly reduces the overshoot and ringing associated with large capacitive loads. One possible

problem with this technique, however, is that a voltage divider is created with the added series resistor and any

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

that reduces the output swing.

Figure 14. Improving Capacitive Load Drive

8.3.6 EMI Susceptibility and Input Filtering

Operational amplifiers vary with regard to the susceptibility of the device to electromagnetic interference (EMI). If

conducted EMI enters the operational amplifier, the dc offset measured at the amplifier output can shift from the

nominal value when EMI is present. This shift is a result of signal rectification associated with the internal

semiconductor junctions. Although EMI can affect all operational amplifier pin functions, the signal input pins are

likely to be the most susceptible. The TLVx316-Q1 operational amplifier family incorporates an internal input low-

pass filter that reduces the amplifier response to EMI. This filter provides both common-mode and differential-

mode filtering. The filter is designed for a cutoff frequency of approximately 80 MHz (–3 dB), with a roll-off of 20

dB per decade.

The immunity of an operational amplifier can be accurately measured and quantified over a broad frequency

spectrum extending from 10 MHz to 6 GHz. The EMI rejection ratio (EMIRR) metric allows operational amplifiers

to be directly compared by the EMI immunity. Figure 12 illustrates the results of this testing on the TLVx316-Q1.

Detailed information can be found in EMI Rejection Ratio of Operational Amplifiers, available for download from

www.ti.com.

8.3.7 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, either because of the high input voltage or the high gain. After the

device enters the saturation region, the charge carriers in the output devices require time to return back to the

linear state. After the charge carriers return back to the linear state, the device begins to slew at the specified

slew rate. Thus, 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 TLVx316-Q1 is approximately 300 ns.

8.4 Device Functional Modes

The TLVx316-Q1 family has a single functional mode. These devices are powered on as long as the power-

supply voltage is between 1.8 V (±0.9 V) and 5.5 V (±2.75 V).