5 kW

10-mA max

V+

V

IN

V

OUT

I

OVERLOAD

Device

V

IN

V

OUT

V+

R

S

10

to

20

W

W

R

L

C

L

Device

16

TLV6001, TLV6002, TLV6004

SBOS779B – JUNE 2016 – REVISED OCTOBER 2016

www.ti.com

Product Folder Links: TLV6001 TLV6002 TLV6004

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Copyright © 2016, Texas Instruments Incorporated

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 TLV600x family incorporates an internal input low-pass filter that reduces the amplifiers

response to EMI. 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 TLV600x 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 TLV600x 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).

8.5 Input and ESD Protection

The TLV600x incorporates internal electrostatic discharge (ESD) protection circuits on all pins. In the case of

input and output pins, this protection primarily consists of current-steering diodes connected between the input

and power-supply pins. The ESD protection diodes provide in-circuit, input overdrive protection, as long as the

current is limited to 10 mA, as stated in the Absolute Maximum Ratings table. Figure 20 shows how a series

input resistor may be added to the driven input to limit the input current. The added resistor contributes thermal

noise at the amplifier input and the value must be kept to a minimum in noise-sensitive applications.

Figure 20. Input Current Protection