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Texas Instruments OPA337UA/2K5
- Part No.:
- OPA337UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA337UA/2K5.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,943
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Product details
Overview
OPA337UA/2K5 from Texas Instruments is a single, rail-to-rail output CMOS operational amplifier optimized for unity-gain stability, 3MHz gain-bandwidth, 1.2V/µs slew rate, 525µA quiescent current per amplifier, and operation from 2.5V to 5.5V single supply - ideal for battery-powered photodiode pre-amplifiers and medical instrumentation signal conditioning.
For engineers reviewing the OPA337UA/2K5 datasheet, OPA337UA/2K5 pinout, OPA337UA/2K5 application, or OPA337UA/2K5 equivalent, key selection criteria include rail-to-rail output swing (≤125mV from rails), FET-input bias current (≤10pA), input common-mode range extending to ground, high open-loop gain (120dB), and SOIC-8 packaging with industry-standard footprint compatibility.
Technical Context
The OPA337UA/2K5 employs advanced CMOS process technology to achieve ultra-low input bias current and rail-to-rail output swing while maintaining unity-gain stability. Its input stage includes ESD-protected FET inputs with differential impedance >10¹³ Ω and common-mode rejection ratio of 74–90dB across −0.2V to (V+)−1.2V.
It operates over −40°C to +85°C with specified performance at 2.7V–5.5V supply, delivering 120dB open-loop gain into 25kΩ load, 3MHz gain-bandwidth product, and 2µs 0.1% settling time for 2V step with 100pF capacitive load - all while drawing only 525µA quiescent current per amplifier.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - supports stable unity-gain operation up to audio and low-speed data acquisition bandwidths. |
| Slew Rate | 1.2V/µs - enables clean 2Vpp output at 1kHz without slew-induced distortion in sensor interfaces. |
| Input Bias Current | ≤10pA max - preserves signal integrity in high-impedance photodiode and electrode circuits. |
| Supply Voltage Range | 2.5V to 5.5V - compatible with Li-ion, coin-cell, and regulated 3.3V/5V systems without level-shifting. |
| Output Swing | ≤125mV from rails (RL = 25kΩ) - maximizes dynamic range in single-supply data acquisition front-ends. |
| Quiescent Current | 525µA per amplifier - enables multi-channel, always-on sensing in portable medical devices. |
| Open-Loop Gain | 120dB - ensures <0.001% gain error in precision transimpedance amplifiers at G = 100. |
Pinout & Package
OPA337UA/2K5 is housed in an 8-pin SOIC (D) surface-mount package with standard JEDEC MS-012AC outline, 1.27mm pitch, and 3.9mm × 4.9mm body size - compatible with automated assembly and legacy PCB footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−In) | Differential input node; accepts signals referenced to ground or virtual ground in single-supply configurations. |
| 2 | Non-Inverting Input (+In) | High-impedance FET input; supports direct connection to high-Z sensors like photodiodes without loading. |
| 3 | Output | Rail-to-rail output capable of sourcing/sinking ±9mA; drives ADC inputs, filters, or low-power analog stages. |
| 4 | V− (Ground) | Power return reference; must be connected to system ground with low-inductance path for noise immunity. |
| 5 | NC | No internal connection - left unconnected; no routing or thermal relief required. |
| 6 | NC | No internal connection - left unconnected; no routing or thermal relief required. |
| 7 | NC | No internal connection - left unconnected; no routing or thermal relief required. |
| 8 | V+ | Positive supply rail; bypassed with 0.01µF ceramic capacitor near pin for high-frequency PSRR stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of ADC input range in 3.3V systems without level-shifting circuitry. |
| FET-input architecture | 10pA max input bias current preserves accuracy in photodiode preamps and pH electrode buffers. |
| Unity-gain stable | Eliminates need for external compensation in buffer, gain-of-one, or transimpedance configurations. |
| Single-supply operation down to 2.5V | Supports direct interface with low-voltage microcontrollers and energy-harvesting power sources. |
| Input common-mode range includes ground | Allows true single-supply operation with grounded sensor references and simplified biasing networks. |
Applications
| Photodiode Pre-Amplifier | Portable Medical Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from silicon photodiodes in pulse oximeters or blood analyzers. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal input bias error. Use Value: 10pA max input bias current prevents offset drift; rail-to-rail output maximizes SNR into 12-bit ADCs. | Use Scenario: Signal conditioning for ECG/EEG electrodes in handheld diagnostic devices. IC Role / Device Role / Timing Role: Low-noise, low-power front-end amplifier with DC-coupled input and high CMRR. Use Value: 120dB open-loop gain ensures precise gain accuracy; 525µA IQ extends battery life in continuous monitoring. |
| Battery-Powered Test Equipment | Consumer Audio Line Driver |
Use Scenario: Portable multimeter or sensor calibrator operating from AA batteries. IC Role / Device Role / Timing Role: Precision buffer and gain stage for reference voltage scaling and sensor excitation. Use Value: 2.5V minimum supply allows operation until battery depletion; 3MHz GBW supports fast auto-ranging. | Use Scenario: Headphone driver or DAC output buffer in compact Bluetooth speakers. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating DAC output from variable headphone loads. Use Value: Rail-to-rail swing delivers full 3.3Vpp audio signal; low THD+N (0.001%) preserves fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA340UA/2K5 | Higher GBW (5.5MHz), higher IQ (750µA), same SOIC-8 package and rail-to-rail output. | Better suited for higher-frequency sensor interfaces (>100kHz) where speed outweighs quiescent current. | Select when 3MHz GBW is insufficient but SOIC-8 footprint and unity-gain stability are mandatory. |
| MCP6001T-E/OT | Lower GBW (1MHz), lower IQ (100µA), SOT-23-5 package, same rail-to-rail output and 2.5V–5.5V supply. | Optimized for ultra-low-power, space-constrained designs where bandwidth ≤100kHz is acceptable. | Select when board area and battery life are critical, and 3MHz performance is unnecessary. |
Compared with OPA337UA/2K5, OPA340UA/2K5 trades 2.5× higher quiescent current for 83% more bandwidth, while MCP6001T-E/OT reduces IQ by 81% but sacrifices 67% bandwidth and uses a different 5-pin package - making OPA337UA/2K5 the balanced choice for mid-speed, precision, single-supply applications requiring SOIC-8 compatibility.
Availability
OPA337UA/2K5 is available at Aetrix Electronics and suitable for battery-powered instruments, photodiode pre-amplifiers, and portable medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for OPA337UA/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, embedded processing, and connectivity technologies with over 90 years of innovation in precision analog ICs.
The OPA337 series belongs to TI's MicroAmplifier™ portfolio, designed specifically for space-constrained, low-power, single-supply applications demanding rail-to-rail output, FET-input precision, and unity-gain stability.
FAQ
What is the maximum operating temperature range for the OPA337UA/2K5?
The OPA337UA/2K5 is rated for operation from −40°C to +85°C, with absolute maximum junction temperature of 150°C. Electrical specifications are guaranteed across this full industrial temperature range, and thermal resistance (θJA) is 150°C/W for the SOIC-8 package - enabling reliable use in enclosed medical enclosures or automotive cabin environments without forced cooling.
Does the OPA337UA/2K5 require external compensation for unity-gain operation?
No, the OPA337UA/2K5 is explicitly unity-gain stable per its datasheet and requires no external compensation components. Its internal compensation ensures phase margin >60° at G = 1, eliminating risk of oscillation in buffer, follower, or transimpedance configurations - unlike the OPA338 series, which mandates gain ≥5 or external compensation for stability.
Can the OPA337UA/2K5 drive capacitive loads such as ADC input capacitance?
Yes, the OPA337UA/2K5 can reliably drive typical ADC input capacitances up to 100pF with 0.1% settling in 2µs, as verified in the datasheet's typical characteristics. For loads >100pF, a small series resistor (e.g., 10–50Ω) between amplifier output and ADC input is recommended to maintain stability and minimize overshoot without degrading bandwidth.
What is the input common-mode voltage range of the OPA337UA/2K5?
The OPA337UA/2K5 has an input common-mode voltage range from (V−) − 0.2V to (V+) − 1.2V, meaning it operates correctly with inputs extending 0.2V below ground and up to 1.2V below the positive rail. This includes ground-referenced sensor outputs and enables true single-supply operation without input biasing resistors in many applications.
Is the OPA337UA/2K5 RoHS compliant and lead-free?
Yes, the OPA337UA/2K5 is RoHS compliant and features a lead-free NIPDAU (nickel-palladium-gold) lead finish. It meets JEDEC MSL Level-2-260C-1 YEAR moisture sensitivity requirements and is qualified for standard reflow soldering processes - confirmed in TI's Package Option Addendum dated 13-Feb-2026.
OPA337UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.2V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 525µA
- Current - Output / Channel:
- 9 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA337UA/2K5 FAQ
1.How can I place an order for OPA337UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA337UA/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 OPA337UA/2K5 reliable?
The price and inventory of OPA337UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA337UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA337UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA337UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA337UA/2K5?
OPA337UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA337UA/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 OPA337UA/2K5?
For technical support, including OPA337UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA337UA/2K5 requirements.
6.How does Aetrix verify that OPA337UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA337UA/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 OPA337UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA337UA/2K5?
All OPA337UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA337UA/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 OPA337UA/2K5 part is unused and in its original packaging.
Return procedure for OPA337UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA337UA/2K5 Tags
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