7.3 Feature Description

7.3.1 Rail-to-Rail Input

The TLVx365 product family features true rail-to-rail input operation, with supply voltages as low as ±1.1 V

(2.2 V). A unique zero-crossover input topology eliminates the input offset transition region typical of many

rail-to-rail, complementary stage operational amplifiers. As shown in Figure 7-1, this topology also allows the

TLVx365 to provide excellent common-mode performance over the entire input range, which extends 100 mV

beyond both power-supply rails. When driving ADCs, the highly linear VCM range of the TLVx365 makes sure

that the system linearity performance is not compromised. For a simplified schematic illustrating the rail-to-rail

input circuitry, see Section 7.2.

200

150

100

50

0

−50

−150

−100

−200

−2

−3

Common−Mode Voltage (V)

3

−1

0

1

2

V =

S

±2.75 V

Competitors

TLV365-Q1

Figure 7-1. TLVx365 Linear Offset Over the Entire Common-Mode Range

7.3.2 Input and ESD Protection

Figure 7-2 shows that the TLVx365 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. These ESD protection diodes also provide in-circuit, input overdrive

protection if the current is limited to 10 mA; see also Section 6.1. Figure 7-3 shows how a series input resistor

can be added to the driven input to limit the input current. The added resistor contributes thermal noise at the

amplifier input; the resistor must be kept to the minimum value in noise-sensitive applications.

Power-Supply

ESD Cell

TVS

V+

TLV365

+

–

V–

VOUT

+IN

–IN

Figure 7-2. ESD Protection Scheme

5 kΩ

TLV365

10 mA max

V+

V

IN

V

OUT

I

OVERLOAD

Figure 7-3. Input Current Protection

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TLV365, TLV2365

SBOSAA8C – DECEMBER 2022 – REVISED AUGUST 2024

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