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OPA2277UA/2K5

IC OPAMP GP 2 CIRCUIT 8SOIC

Part Number: OPA2277UA/2K5

Manufacturer: Texas Instruments

Category: Instrumentation, Op Amps, Buffer Amps

Package: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: OPA2277UA/2K5.pdf

Description: IC OPAMP GP 2 CIRCUIT 8SOIC

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

OPA2277UA/2K5 High-Precision, Low-Power Operational Amplifier

A comprehensive technical overview of the OPA2277UA/2K5, a dual high-precision operational amplifier from Texas Instruments featuring ultra-low offset voltage and drift. Covers device function, core features, electrical specifications, 8-pin SOIC package, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 8-Pin SOIC (D) ±2V to ±18V Dual Supply

Device Classification Dual High-Precision Operational Amplifier

Part Number: OPA2277UA/2K5

Mounting Type: Surface Mount

Operating Temperature Range: -40°C to +85°C

PRODUCT OVERVIEW

What Is the OPA2277UA/2K5?

OPA2277UA/2K5 is a dual high-precision operational amplifier from Texas Instruments, designed as an upgrade replacement for the industry-standard OP-177. The device offers improved noise performance, wider output voltage swing, and is twice as fast with half the quiescent current of its predecessor.[reference:0]

The OPA2277UA/2K5 features ultra-low offset voltage of 10 µV and ultra-low drift of ±0.1 µV/°C[reference:1], making it ideal for precision instrumentation and data acquisition applications. With high open-loop gain of 134 dB, high CMRR of 140 dB, and high PSRR of 130 dB[reference:2], the device maintains excellent performance over a wide range of operating conditions.

Operating from ±2-V to ±18-V dual supplies, the OPA2277UA/2K5 is specified for real-world applications with a single limit applying over the ±5-V to ±15-V supply range[reference:3]. The device is unity-gain stable, free from phase inversion, and provides excellent dynamic behavior over a wide range of load conditions.[reference:4]

Ultra-Low Offset & Drift 10 µV max offset voltage with ±0.1 µV/°C drift for precision performance.[reference:5]

High Precision 134 dB open-loop gain, 140 dB CMRR, and 130 dB PSRR.[reference:6]

Wide Supply Range Operates from ±2 V to ±18 V dual supplies for versatile system integration.[reference:7]

DEVICE HIGHLIGHTS

Key Features and Benefits of OPA2277UA/2K5

Ultra-Low Offset Voltage

10 µV maximum input offset voltage eliminates the need for user adjustment in most applications, simplifying design and improving accuracy.[reference:8][reference:9]

Ultra-Low Offset Drift

±0.1 µV/°C maximum drift ensures stable performance over temperature variations, critical for precision instrumentation.[reference:10]

High Common-Mode & Power-Supply Rejection

140 dB CMRR and 130 dB PSRR provide excellent rejection of noise and interference, maintaining signal integrity in noisy environments.[reference:11][reference:12]

Wide Supply Voltage Range

Operates from ±2 V to ±18 V with specified performance across ±5 V to ±15 V, offering flexibility for various system voltages.[reference:13]

Low Quiescent Current

790 µA per amplifier (x2 channels) with improved noise and twice the speed of the industry-standard OP-177, ideal for power-sensitive designs.[reference:14][reference:15]

Industry-Standard Upgrade

Direct replacement for OP-07, OP-77, and OP-177 with improved performance, offering a drop-in upgrade path for existing designs.[reference:16]

REFERENCE DATA

Technical Specifications for OPA2277UA/2K5

Part Number	OPA2277UA/2K5	Manufacturer	Texas Instruments
Device Type	Dual High-Precision Operational Amplifier	Number of Channels	2
Supply Voltage (Dual)	±2V to ±18V	Supply Voltage (Single)	4V to 36V
Quiescent Current (per channel)	790 µA (Typical)[reference:17]	Output Current per Channel	35 mA[reference:18]
Input Offset Voltage (Max)	10 µV[reference:19]	Input Offset Drift (Max)	±0.1 µV/°C[reference:20]
Input Bias Current (Max @ 25°C)	1 nA[reference:21]	Input Bias Current (Max over Temp)	4 nA[reference:22]
Open-Loop Gain	134 dB[reference:23]	CMRR	140 dB[reference:24]
PSRR	130 dB[reference:25]	Gain-Bandwidth Product	1 MHz[reference:26]
Slew Rate	0.8 V/µs[reference:27]	Input Voltage Noise Density	12 nV/√Hz @ 10 Hz[reference:28]
Package	8-Pin SOIC (D)[reference:29]	Package Body Size	4.90 mm × 3.91 mm
Mounting Type	Surface Mount	Operating Temperature	-40°C to +85°C[reference:30]
Storage Temperature	-65°C to +150°C	MSL Rating	Level-3-260C-168 HR[reference:31]
Lead Finish	NiPdAu[reference:32]	RoHS	Yes[reference:33]
Packaging	Tape & Reel (2,500 per Reel)[reference:34]	US ECCN	EAR99[reference:35]

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use.

DESIGN REFERENCE

Circuit Considerations for OPA2277UA/2K5

Typical Application Configurations

The OPA2277UA/2K5 is a high-precision operational amplifier suitable for a wide range of applications:

Precision Instrumentation: Ultra-low offset voltage and drift enable accurate measurement in data acquisition and test equipment
Sensor Signal Conditioning: Low bias current (1 nA max) and high CMRR for bridge sensors and thermocouple amplifiers[reference:36]
Active Filters: 1 MHz gain-bandwidth product supports precision filter designs[reference:37]
Medical Equipment: ECG and patient monitoring systems requiring high precision and low noise
Industrial Control: Process control and automation systems
Audio Equipment: Professional audio signal processing

PCB and Power-Supply Guidance

High-precision op-amp performance depends on layout, bypassing, and power supply quality:

Bypass Capacitors: Place 0.1 µF ceramic capacitors close to each supply pin to reduce noise and oscillation
Layout Considerations: Keep input traces short and away from noisy digital signals. Use a ground plane for optimal performance
Feedback Network: Keep feedback components close to the inverting input to minimize parasitic capacitance
Guard Rings: For high-impedance applications, consider guard ring techniques to prevent leakage currents
Output Load: The device can drive up to 35 mA output current; ensure adequate thermal management for high load currents[reference:38]
Dual Supply Operation: The device is specified for ±2 V to ±18 V operation; single-supply operation from 4 V to 36 V is also supported[reference:39]
Common-Mode Input Range: For optimal performance, keep the input common-mode voltage within 2 V of the supply rails[reference:40]
Verify the recommended PCB footprint from the official datasheet before production

8-PIN SOIC (D)

Pin Configuration Reference for OPA2277UA/2K5

OPA 2277U

SOIC (D) TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The D package has 8 pins with 1.27mm pitch. Device marking is "OPA 2277U".[reference:41]

1 OUT A Output of Amplifier A

2 IN- A Inverting Input of Amplifier A

3 IN+ A Non-Inverting Input of Amplifier A

4 V- Negative Supply Voltage - Connect to negative supply (or GND for single supply)

5 IN+ B Non-Inverting Input of Amplifier B

6 IN- B Inverting Input of Amplifier B

7 OUT B Output of Amplifier B

8 V+ Positive Supply Voltage - ±2V to ±18V or 4V to 36V single supply

APPLICATION AREAS

Typical Applications for OPA2277UA/2K5

Precision Instrumentation

Data acquisition systems, test equipment, and precision measurement instruments.

Medical Equipment

ECG, patient monitoring, and medical diagnostic systems.

Sensor Signal Conditioning

Bridge sensors, thermocouples, pressure sensors, and strain gauges.

Industrial Control

Process control, factory automation, and industrial instrumentation.

Active Filters

Precision active filter designs for signal processing.

Professional Audio

High-quality audio signal processing and mixing equipment.

REPLACEMENT GUIDANCE

Selecting an Alternative for OPA2277UA/2K5

A replacement for the OPA2277UA/2K5 should not be selected only by product category. The electrical characteristics, package, and pin configuration must be evaluated against the actual circuit requirements.

Supply voltage range (±2V–±18V)

Number of channels (2)

Input offset voltage (10 µV max)[reference:42]

Offset drift (±0.1 µV/°C max)[reference:43]

Input bias current (1 nA max)[reference:44]

CMRR / PSRR (140 dB / 130 dB)[reference:45]

Package (8-pin SOIC, D)[reference:46]

Temperature range (–40°C to 85°C)[reference:47]

Family alternatives: OPA2277UA (tube packaging, 75 per tube), OPA2277U/2K5 (standard grade). Single-channel version: OPA277UA. Quad-channel version: OPA4277UA. For similar performance with ±40-V overvoltage protection, see the OPA2206.[reference:48] Select based on channel count, packaging, and protection requirements.

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MANUFACTURER INFORMATION

Texas Instruments

The OPAx277 series (OPA2277UA/2K5) is a high-precision operational amplifier family from Texas Instruments, designed as an upgrade replacement for the industry-standard OP-177. The series offers improved noise, wider output voltage swing, and is twice as fast with half the quiescent current.[reference:49] The devices are easy to use and free from phase inversion and overload problems found in some other op amps.[reference:50]

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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Specifications

Product Attribute: Attribute Value

Part Number: OPA2277UA/2K5

Manufacturer: Texas Instruments

Package: 8-SOIC (0.154", 3.90mm Width)

Series: -

Package/Case: 8-SOIC (0.154", 3.90mm Width)

Packaging: Tape & Reel (TR)

Product Status: Active

Amplifier Type: General Purpose

Number of Circuits: 2

Output Type: -

Slew Rate: 0.8V/µs

Gain Bandwidth Product: 1 MHz

-3db Bandwidth: -

Current - Input Bias: 4 nA

Voltage - Input Offset: 20 µV

Current - Supply: 790µA (x2 Channels)

Current - Output / Channel: 35 mA

Voltage - Supply Span (Min): 4 V

Voltage - Supply Span (Max): 36 V

Operating Temperature: -40°C ~ 85°C

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 8-SOIC

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Part Number: OPA2277UA/2K5

Manufacturer: Texas Instruments

Package: 8-SOIC (0.154", 3.90mm Width)

Category: Instrumentation, Op Amps, Buffer Amps

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