TLV4313IPWR datasheet(18/44 Pages) TI2

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OUT

V+

Device

TLV313, TLV2313, TLV4313

SBOS753B – JUNE 2016 – REVISED FEBRUARY 2017

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Product Folder Links: TLV313 TLV2313 TLV4313

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Feature Description (continued)

One technique for increasing the capacitive load drive capability of the amplifier when it operates 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 19.

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

problem with this technique 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 19. 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 op amp, the dc offset observed at the amplifier output may shift from the nominal value

while EMI is present. This shift is a result of signal rectification associated with the internal semiconductor

junctions. While all op amp pin functions may be affected by EMI, the signal input pins are likely to be the most

susceptible. The TLV313 family incorporates an internal input low-pass filter that reduces the amplifiers response

to EMI. Both common-mode and differential mode filtering are provided by this filter. The filter is designed for a

cutoff frequency of approximately 35 MHz (–3 dB), with a roll-off of 20 dB per decade.

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. The EMI rejection ratio (EMIRR)

metric allows op amps to be directly compared by the EMI immunity. Figure 18 illustrates the results of this

testing on the TLV313 family. Detailed information may be found in EMI Rejection Ratio of Operational Amplifiers

(SBOA128), available for download from www.ti.com.

8.4 Device Functional Modes

The TLV313 devices have a single functional mode. The 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).

TLV4313IPWR Datasheet(PDF) 18 Page - Texas Instruments