OPA2377 datasheet(9/26 Pages) TI1

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100nF

10kW

1kW

+5V

OUT

=2.5V

OPA377

-0.5

-1

-2

-3

InputCommon-ModeVoltage(V)

6.0

0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

-V

OPA377

OPA2377

OPA4377

www.ti.com

SBOS504B

– FEBRUARY 2010 – REVISED JANUARY 2011

APPLICATION INFORMATION

OPERATING CHARACTERISTICS

The OPA377 family of amplifiers has parameters that

are fully specified from 2.2V to 5.5V (

±1.1V to

±2.75V). Many of the specifications apply from –40°C

to +125

°C. Parameters that can exhibit significant

variance

with

regard

operating

voltage

temperature

are

presented

the

Typical

Characteristics.

GENERAL LAYOUT GUIDELINES

For best operational performance of the device, good

printed circuit board (PCB) layout practices are

required. Low-loss, 0.1mF bypass capacitors must be

connected between each supply pin and ground,

placed as close to the device as possible. A single

bypass capacitor from V+ to ground is applicable to

single-supply applications.

BASIC AMPLIFIER CONFIGURATIONS

Figure 21. Basic Single-Supply Connection

The OPA377 family is unity-gain stable. It does not

exhibit output phase inversion when the input is

overdriven. A typical single-supply connection is

COMMON-MODE VOLTAGE RANGE

shown in Figure 21. The OPA377 is configured as a

The input common-mode voltage range of the

basic inverting amplifier with a gain of

–10V/V. This

OPA377 series extends 100mV beyond the supply

single-supply connection has an output centered on

rails. The offset voltage of the amplifier is low, from

the common-mode voltage, VCM. For the circuit

approximately (V

–) to (V+) – 1V, as shown in

shown, this voltage is 2.5V, but may be any value

Figure

22.

The

offset

voltage

increases

within the common-mode input voltage range.

common-mode

voltage

exceeds

(V+)

–1V.

Common-mode rejection is specified from (V

–) to

(V+)

– 1.3V.

Figure 22. Offset and Common-Mode Voltage

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