Name: OPA277UA/2K5
Brand: Texas Instruments
SKU: OPA277UA/2K5

Type

Parameter

Number of channels

Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V)

Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V)

Vos (offset voltage at 25°C) (max) (mV)

0.02

Offset drift (typ) (µV/°C)

0.1

Input bias current (max) (pA)

1000

GBW (typ) (MHz)

Features

Small Size

Slew rate (typ) (V/µs)

0.8

Rail-to-rail

Iq per channel (typ) (mA)

0.79

Vn at 1 kHz (typ) (nV√Hz)

CMRR (typ) (dB)

140

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Iout (typ) (A)

0.035

Architecture

Bipolar

Input common mode headroom (to negative supply) (typ) (V)

Input common mode headroom (to positive supply) (typ) (V)

-2

Output swing headroom (to negative supply) (typ) (V)

0.5

Output swing headroom (to positive supply) (typ) (V)

-1.2

THD + N at 1 kHz (typ) (%)

0.002

Manufacturer:

Texas Instruments

Product Category:

Precision Amplifiers

Number of Channels:

1 Channel

GBP - Gain Bandwidth Product:

1 MHz

SR - Slew Rate:

800 mV/us

Vos - Input Offset Voltage:

35 uV

Ib - Input Bias Current:

500 pA

Supply Voltage - Max:

36 V

Supply Voltage - Min:

4 V

Operating Supply Current:

790 uA

Output Current per Channel:

35 mA

CMRR - Common Mode Rejection Ratio:

140 dB

en - Input Voltage Noise Density:

8 nV/sqrt Hz

Package / Case:

SOIC-8

Mounting Style:

SMD/SMT

Shutdown:

No Shutdown

Minimum Operating Temperature:

- 40 C

Maximum Operating Temperature:

+ 85 C

Series:

OPA277

Packaging:

MouseReel

Amplifier Type:

Low Offset Amplifier

Brand:

Texas Instruments

In - Input Noise Current Density:

200 fA

Input Type:

Rail-to-Rail

Moisture Sensitive:

Yes

Output Type:

Rail-to-Rail

Product:

Precision Amplifiers

Product Type:

Precision Amplifiers

PSRR - Power Supply Rejection Ratio:

130.46 dB

Subcategory:

Amplifier ICs

Technology:

Bipolar

Voltage Gain dB:

140 dB

Unit Weight:

0.002677 oz

Description for the OPA277

The OPAx277 series of precision operational amplifiers replace the industry standard OP-177. The OPAx277 devices offer improved noise, wider output voltage swing, and are twice as fast with half the quiescent current. Features include ultra-low offset voltage and drift, low bias current, high common-mode rejection, and high power supply rejection.

The OPAx277 operate from ±2-V to ±18-V supplies with excellent performance. Unlike most op amps that are specified at only one supply voltage, the OPAx277 series is specified for real-world applications; a single limit applies over the ±5-V (10-V) to ±15-V (30-V) supply range. High performance is maintained as the amplifiers swing to the specified limits. Because the initial offset voltage (±20 µV, maximum) is so low, user adjustment is usually not required. However, the single version (OPA277) provides external trim pins for special applications.

The OPAx277 are easy to use and free from phase inversion and the overload problems found in some other op amps. These devices are unity-gain stable and provide excellent dynamic behavior over a wide range of load conditions. Dual and quad versions feature completely independent circuitry for lowest crosstalk and freedom from interaction, even when overdriven or overloaded.

Item	Description
Part Number	OPA277UA/2K5
Manufacturer	Texas Instruments
Product Category	Operational Amplifier / Precision Op Amp
Amplifier Type	High-precision bipolar operational amplifier
Number of Channels	1 channel
Input Type	Bipolar
Supply Voltage Range	±2V to ±18V, or up to 36V total supply span
Input Offset Voltage	10µV
Offset Voltage Drift	±0.1µV/°C
Open-Loop Gain	134dB
Common-Mode Rejection Ratio	140dB
Power-Supply Rejection Ratio	130dB
Input Bias Current	1nA maximum
Quiescent Current	800µA per amplifier
Package	SOIC-8 / D package
Operating Temperature	-40°C to +85°C
Product Status	Active
Packaging	Tape & Reel, 2.5K reel quantity style

Ultra-low offset voltage: 10 µV
Ultra-low drift: ±0.1 µV/°C
High open-loop gain: 134 dB
High common-mode rejection: 140 dB
High power-supply rejection: 130 dB
Low bias current: 1-nA maximum
Wide supply range: ±2 V to ±18 V
Low quiescent current: 800 µA/amplifier
Single, dual, and quad versions
Replaces OP-07, OP-77, and OP-177
For similar performance with ±40-V overvoltage protection, see the OPA2206

Key Features

1. Ultra-low 10µV input offset voltage
The very low input offset voltage helps reduce DC error in precision measurement and signal-conditioning circuits, especially when amplifying small sensor or instrumentation signals.

2. Very low ±0.1µV/°C offset drift
Low offset drift improves measurement stability across temperature changes, making the device suitable for industrial, medical, and test equipment that must remain accurate over time and temperature.

3. Wide ±2V to ±18V supply range
OPA277UA/2K5 can operate from dual supplies as low as ±2V and as high as ±18V, or up to a 36V total supply span, giving designers flexibility in both low-voltage and higher-voltage analog systems.

4. High open-loop gain
The 134dB open-loop gain supports accurate closed-loop amplification, which is important in precision gain stages, instrumentation circuits, and low-error analog signal chains.

5. Excellent common-mode rejection
With 140dB CMRR, the amplifier helps reject common-mode noise and unwanted input signal components, which is valuable in sensor interfaces and differential measurement-related circuits.

6. High power-supply rejection
The 130dB PSRR helps reduce the effect of supply noise on the amplifier output, supporting stable performance in mixed-signal and industrial systems where supply rails may contain switching noise.

7. Low input bias current
The 1nA maximum input bias current helps reduce error when working with high-impedance signal sources, precision sensors, and resistor networks.

8. Low quiescent current
At 800µA per amplifier, the device provides precision performance while keeping supply current moderate, making it useful in systems where both accuracy and power consumption matter.

9. Compact SOIC-8 package
The SOIC-8 package is widely used, easy to assemble, and suitable for production SMT designs. TI lists the OPA277UA/2K5 in an 8-pin SOIC D package.

Applications

OPA277UA/2K5 is suitable for analog circuits that require high DC accuracy, low drift, low offset error, and stable precision signal conditioning.

Application Area	Typical Use
Precision instrumentation	Sensor signal conditioning, low-level signal amplification
Industrial control systems	Accurate analog measurement, control-loop signal conditioning
Data acquisition systems	ADC front-end amplifiers, gain stages, buffering
Medical instrumentation	Precision measurement circuits and low-frequency signal conditioning
Test and measurement equipment	Accurate voltage/current measurement, reference buffering
Bridge sensor circuits	Load cells, pressure sensors, strain gauges
Precision filters	Active filters requiring low offset and low drift
Power monitoring systems	Current sense amplification, voltage monitoring, analog scaling
Calibration equipment	Stable precision amplifier stages
Replacement / upgrade designs	Replacement for older precision op amps such as OP-07, OP-77, and OP-177