TLV313IDBVR.A datasheet(19/44 Pages) TI2

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1.8

3.6

0.5

OUT

VSUP+

VOUT

VIN

VSUP±

TLV313, TLV2313, TLV4313

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SBOS753B – JUNE 2016 – REVISED FEBRUARY 2017

Product Folder Links: TLV313 TLV2313 TLV4313

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9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The TLVx313 devices are a family of low-power, rail-to-rail input and output operational amplifiers specifically

designed for portable applications. The devices operate from 1.8 V to 5.5 V, are unity-gain stable, and are

suitable for a wide range of general-purpose applications. The class AB output stage is capable of driving

≤ 10-

kΩ loads connected to any point between V+ and ground. The input common-mode voltage range includes both

rails, and allows the TLV313 family to be used in virtually any single-supply application.

9.2 Typical Application

A typical application for an operational amplifier is an inverting amplifier, as shown in Figure 20. An inverting

amplifier takes a positive voltage on the input and outputs a signal inverted to the input, making a negative

voltage of the same magnitude. In the same manner, the amplifier also makes negative input voltages positive on

the output. In addition, amplification may be added by selecting the input resistor RI and the feedback resistor RF.

Figure 20. Application Schematic

9.2.1 Design Requirements

The supply voltage must be chosen to be larger than the input voltage range and the desired output range. The

limits of the input common-mode range (VCM) and the output voltage swing to the rails (VO) must also be

considered. For instance, this application scales a signal of ±0.5 V (1 V) to ±1.8 V (3.6 V). Setting the supply at

±2.5 V is sufficient to accommodate this application.

9.2.2 Detailed Design Procedure

Determine the gain required by the inverting amplifier using Equation 1 and Equation 2:

(1)

(2)

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