OPA325IDBVR datasheet(18/42 Pages) TI1

18 / 42 page

IOVERLOAD

10 mA max

NŸ

VIN

VOUT

+5V

Current-limiting resistor

required if input voltage

exceeds supply rails by

> 0.3V.

Offset Voltage (µV)

C002

OPA325, OPA2325, OPA4325

SBOS637D – OCTOBER 2016 – REVISED JUNE 2019

www.ti.com

Product Folder Links: OPA325 OPA2325 OPA4325

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Feature Description (continued)

7.3.2 Low Input Offset Voltage

The OPAx325 are manufactured using TI's e-trim technology. Each amplifier is trimmed in production, thereby

minimizing errors associated with input offset voltage. The e-trim technology is a TI proprietary method of

trimming internal device parameters during either wafer probing or final testing. This process allows the

OPAx325 to have an excellent offset specification of 150 µV (maximum). Figure 42 shows the offset voltage

distribution for the OPAx325.

Figure 42. Offset Voltage Distribution

7.3.3 Input and ESD Protection

The OPAx325 incorporate 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, as long

as the current is limited to 10 mA as stated in the Absolute Maximum Ratings table. Figure 43 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; thus, keep the value to a minimum in noise-sensitive applications.

Figure 43. Input Current Protection

7.4 Device Functional Modes

The OPAx325 have a single functional mode and are operational when the power-supply voltage is greater than

2.2 V (±1.1 V). The maximum power-supply voltage for the OPAx325 is 5.5 V (±2.75 V).

OPA325IDBVR bảng dữ liệu(PDF) 18 Page - Texas Instruments