My Inquiry
My Account
Texas Instruments OPA2227UA/2K5
- Part No.:
- OPA2227UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2227UA/2K5.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,260
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA2227UA/2K5 from Texas Instruments is a dual, high-precision, low-noise operational amplifier in SOIC-8 package, delivering 3 nV/√Hz voltage noise, 8 MHz gain-bandwidth product, and ±75 µV max input offset voltage. It operates from ±2.5 V to ±18 V supplies and serves as a pin-compatible upgrade to OP-27 and LT1007 in precision analog front-ends for data acquisition and professional audio.
For engineers reviewing the OPA2227UA/2K5 datasheet, OPA2227UA/2K5 pinout, OPA2227UA/2K5 application, or OPA2227UA/2K5 equivalent, key selection criteria include its unity-gain stability, 2.3 V/µs slew rate, 138 dB CMRR, low 10 nA input bias current, and guaranteed performance across –40°C to 85°C.
Technical Context
The OPA2227UA/2K5 implements a bipolar input stage optimized for low voltage noise and high DC precision, with fully differential input architecture enabling 138 dB common-mode rejection. Its internal compensation ensures unity-gain stability without external components.
It supports rail-to-rail output swing within 2 V of each supply (±2.5 V min supply), maintains 160 dB open-loop gain at 25°C, and achieves 5 µs settling time to 0.1% for a 10 V step - critical for high-fidelity signal conditioning in multi-channel systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 8 MHz - enables stable closed-loop operation up to 100 kHz with G = 100, suitable for anti-aliasing and reconstruction filters. |
| Slew Rate | 2.3 V/µs - supports full-scale 10 Vpp signals up to ~370 kHz without distortion in unity-gain buffer configurations. |
| Voltage Noise | 3 nV/√Hz @ 1 kHz - preserves SNR in low-level sensor amplification (e.g., strain gauges, thermocouples) without requiring excessive gain staging. |
| Input Offset Voltage | ±75 µV max - reduces DC error to < 0.00075% of 10 V full scale, minimizing calibration burden in 16-bit+ data acquisition systems. |
| CMRR | 138 dB - rejects > 79 million:1 common-mode interference, essential for differential measurements in noisy industrial environments. |
| Supply Range | ±2.5 V to ±18 V - allows direct interface with legacy ±15 V rails or modern low-voltage ±3.3 V/±5 V systems without level-shifting. |
| Quiescent Current | ±3.8 mA per amplifier - balances precision and power efficiency for battery-powered portable instrumentation. |
Pinout & Package
OPA2227UA/2K5 is housed in an 8-pin SOIC (SO-8) package measuring 4.90 mm × 3.91 mm, with standard surface-mount footprint and moisture sensitivity level (MSL) 2a per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Out A (Pin 1) | Output channel A | Low-impedance buffered voltage source; drives 10 kΩ loads to within 2 V of either supply rail. |
| –In A (Pin 2) | Inverting input channel A | Differential input node with 10⁹ Ω || 3 pF common-mode impedance; connects to feedback network in inverting configurations. |
| +In A (Pin 3) | Noninverting input channel A | Differential input node referenced to system ground or virtual ground; requires matched layout for optimal CMRR. |
| V– (Pin 4) | Negative supply | Return path for internal bias currents; must be decoupled with 0.1 µF capacitor near pin for stability. |
| +In B (Pin 5) | Noninverting input channel B | Independent input for second amplifier; electrically isolated from Channel A with >120 dB channel separation at DC. |
| –In B (Pin 6) | Inverting input channel B | Second differential input; shares no internal nodes with Channel A - enables true dual-channel signal processing. |
| Out B (Pin 7) | Output channel B | Fully independent output; capable of simultaneous sourcing/sinking ±45 mA short-circuit current. |
| V+ (Pin 8) | Positive supply | Primary power rail; supplies all internal circuitry including input stage, gain block, and output driver. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable | Operates reliably with no external compensation in G = 1 configurations - eliminates risk of oscillation in buffers and active filters. |
| Low 10 nA input bias current | Minimizes voltage drop across high-impedance sensor sources (e.g., pH electrodes, piezoelectric transducers), preserving signal integrity. |
| 160 dB open-loop gain | Ensures < 0.0001% gain error in precision gain stages (e.g., G = 1000), critical for calibrated measurement systems. |
| 0.00005% THD+N | Preserves waveform fidelity in audio line drivers and spectrum analyzers where harmonic artifacts degrade dynamic range. |
| –40°C to 85°C operation | Validated performance across industrial temperature range - no derating required for embedded control or telecom infrastructure. |
Applications
| Professional Audio Line Driver | Data Acquisition Front-End |
|---|---|
Use Scenario: Driving balanced XLR outputs from ADC-based digital mixers with minimal added noise and distortion. IC Role / Device Role / Timing Role: Dual-channel precision buffer and level shifter, maintaining signal symmetry and rejecting ground-loop interference. Use Value: 3 nV/√Hz noise floor and 0.00005% THD+N enable >120 dB SNR and >110 dB THD+N in 24-bit audio paths. | Use Scenario: Amplifying low-level outputs from load cells and RTDs before 24-bit sigma-delta ADC conversion. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end stage with matched dual channels for ratiometric sensing. Use Value: ±75 µV offset and 0.1 µV/°C drift minimize calibration frequency; 138 dB CMRR rejects EMI in factory-floor environments. |
| Vibration Analysis Sensor Interface | Geophysical Signal Conditioning |
Use Scenario: Conditioning charge-mode outputs from IEPE accelerometers in structural health monitoring systems. IC Role / Device Role / Timing Role: Low-noise charge-to-voltage converter with wide bandwidth for capturing transient shock events up to 10 kHz. Use Value: 8 MHz GBW and 2.3 V/µs slew rate support accurate reproduction of fast rise-time vibration pulses without phase lag. | Use Scenario: Amplifying microvolt-level signals from seismic geophones deployed in remote field arrays. IC Role / Device Role / Timing Role: Ultra-low-noise preamplifier with high input impedance and low 1/f noise for sub-Hz signal recovery. Use Value: 90 nVpp 0.1–10 Hz noise and 10⁹ Ω input impedance prevent signal attenuation and thermal EMF corruption in long cable runs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2227U | Same silicon, SOIC-8 package but not tape-and-reel (bulk vs. 2.5k reel); identical electrical specs and pinout. | No functional difference; selected when smaller order quantities or prototyping use cases dominate. | Choose OPA2227U for evaluation or low-volume builds; OPA2227UA/2K5 is optimized for automated SMT assembly. |
| LT1007CN8#PBF | Higher 1.8 nV/√Hz noise at 10 Hz but wider 10 MHz GBW; ±125 µV max offset; requires external compensation for unity-gain stability. | Better high-frequency AC response but inferior DC precision and stability margin; suited for RF IF amplifiers over precision DC. | Select LT1007CN8#PBF only when bandwidth > 8 MHz is mandatory and offset calibration is feasible; OPA2227UA/2K5 offers plug-and-play precision. |
Compared with OPA2227U and LT1007CN8#PBF, the OPA2227UA/2K5 delivers superior DC accuracy (±75 µV vs. ±125 µV), guaranteed unity-gain stability, and production-ready tape-and-reel packaging - reducing design risk and manufacturing overhead in volume instrumentation programs.
Availability
OPA2227UA/2K5 is available at Aetrix Electronics and suitable for professional audio equipment, precision data acquisition systems, and geophysical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for OPA2227UA/2K5 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision op-amps and signal chain solutions.
The OPAx22x product line was engineered specifically for applications demanding simultaneous high AC fidelity and DC accuracy - bridging the gap between legacy precision op-amps and modern high-speed amplifiers.
FAQ
What is the maximum operating supply voltage for OPA2227UA/2K5?
The OPA2227UA/2K5 supports a total supply voltage range of ±2.5 V to ±18 V, with absolute maximum ratings up to ±18 V per rail (36 V total). Operation beyond ±18 V risks permanent damage. The device maintains specified performance across the full ±5 V to ±15 V range, making it compatible with both legacy ±15 V and modern ±5 V systems.
Does OPA2227UA/2K5 require external compensation capacitors?
No, the OPA2227UA/2K5 is internally compensated and unity-gain stable. It does not require external compensation capacitors for stable operation at G = 1. However, 0.1 µF ceramic decoupling capacitors placed close to Pins 4 (V–) and 8 (V+) are mandatory to suppress high-frequency supply noise and prevent oscillation in noisy environments.
Is OPA2227UA/2K5 pin-compatible with OP-27 or LT1007?
Yes, the OPA2227UA/2K5 is a pin-for-pin replacement for the dual versions of OP-27 (e.g., OP27GP) and LT1007 (e.g., LT1007CN8) in SOIC-8 packages. It retains identical pin functions and footprints while improving noise (3 nV/√Hz vs. 3.5 nV/√Hz), offset (±75 µV vs. ±125 µV), and CMRR (138 dB vs. 126 dB).
What is the typical input bias current of OPA2227UA/2K5 at 25°C?
The typical input bias current of OPA2227UA/2K5 is ±2.5 nA at 25°C, with a maximum of ±10 nA over the full –40°C to +85°C temperature range. This low bias current minimizes voltage errors when interfacing with high-impedance sensors such as photodiodes or piezoelectric elements, preserving signal fidelity without additional guarding or bias cancellation networks.
Can OPA2227UA/2K5 drive capacitive loads directly?
The OPA2227UA/2K5 can drive moderate capacitive loads (≤100 pF) stably without isolation resistors. For loads >100 pF, a series resistor (typically 20–100 Ω) between the output and capacitance is recommended to maintain phase margin. Data sheet Figure 26 confirms ≤10% overshoot with 1500 pF at G = –1, but layout parasitics must be minimized to avoid unintended resonance.
OPA2227UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- 2.3V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2.5 nA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 3.7mA (x2 Channels)
- Current - Output / Channel:
- 45 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2227UA/2K5 FAQ
1.How can I place an order for OPA2227UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2227UA/2K5 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for OPA2227UA/2K5 reliable?
The price and inventory of OPA2227UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2227UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2227UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2227UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2227UA/2K5?
OPA2227UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2227UA/2K5 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for OPA2227UA/2K5?
For technical support, including OPA2227UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2227UA/2K5 requirements.
6.How does Aetrix verify that OPA2227UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2227UA/2K5 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that OPA2227UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2227UA/2K5?
All OPA2227UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2227UA/2K5, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The OPA2227UA/2K5 part is unused and in its original packaging.
Return procedure for OPA2227UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2227UA/2K5 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
