9

TP2311/TP2312 / TP2314

10MHz Bandwidth, Low Noise Precision Op-amps

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Rev. A04

Pin Functions

-IN: Inverting Input of the Amplifier.

+IN: Non-Inverting Input of Amplifier.

OUT: Amplifier Output. The voltage range extends to

within mV of each supply rail.

is from 2.2V to 5.5V. Split supplies are possible as long

as the voltage between V+ and V

– is between 2.2V and

5.5V

. A bypass capacitor of 0.1μF as close to the part as

possible should be used between power supply pins or

between supply pins and ground.

ground. It can also be tied to a voltage other than

2.2V to 5.5V. If it is not connected to ground, bypass it

with a capacitor of 0.1μF as close to the part as

possible.

Operation

The TP2311 series op amps can operate on a single-supply voltage (2.2 V to 5.5 V), or a split-supply voltage (±1.1 V to

±2.75 V), making them highly versatile and easy to use. The power-supply pins should have local bypass ceramic

capacitors (typically 0.001 μF to 0.1 μF). These amplifiers are fully specified from +2.2 V to +5.5 V and over the

extended temperature range of

–40°C to +125°C. Parameters that can exhibit variance with regard to operating voltage

or temperature are presented in the Typical Characteristics.

Applications Information

Input ESD Diode Protection

The TP2311 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. Many input signals are inherently current-limited to less than

10 mA; therefore, a limiting resistor is not required. Figure 1 shows how a series input resistor (RS) 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 should be kept to the minimum in noise-sensitive applications.