OPA2325 Datasheet, PDF (16/32 Pages) Texas Instruments – Precision, 10-MHz, Low-Noise, Low-Power, RRIO, CMOS Operational Amplifier

OPA2325
SBOS637 – OCTOBER 2016
www.ti.com
Feature Description (continued)
7.3.2 Low Input Offset Voltage
The OPA2325 is 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
OPA2325 to have excellent offset specifications of 150 µV (max). Figure 42 shows the offset voltage distribution
for the OPA2325.
15
10
5
0
Offset Voltage (µV)
C002
Figure 42. Offset Voltage Distribution
7.3.3 Input and ESD Protection
The OPA2325 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, 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.
I_OVERLOAD
10-mA max
V_IN
5 kW
V+
TI Device
V_OUT
Copyright © 2016, Texas Instruments Incorporated
Figure 43. Input Current Protection
7.4 Device Functional Modes
The OPA2325 has a single functional mode and is operational when the power-supply voltage is greater than
2.2 V (±1.1 V). The maximum power-supply voltage for the OPA2325 is 5.5 V (±2.75 V).
16
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