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Texas Instruments OPA337NA/250G4
- Part No.:
- OPA337NA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA337NA/250G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,865
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Product details
Overview
OPA337NA/250G4 from Texas Instruments is a single, rail-to-rail output CMOS operational amplifier in SOT23-5 package, designed for low-power, space-constrained applications. It features 3MHz gain-bandwidth, 1.2V/µs slew rate, 120dB open-loop gain, ±3mV max input offset voltage, and operates from 2.5V to 5.5V single supply with only 525µA quiescent current per amplifier - ideal for battery-powered instrumentation and photodiode pre-amplification.
For engineers reviewing the OPA337NA/250G4 datasheet, OPA337NA/250G4 pinout, OPA337NA/250G4 application, or OPA337NA/250G4 equivalent, key selection considerations include unity-gain stability, FET-input bias current ≤10pA, rail-to-rail output swing within 125mV of rails (RL = 25kΩ), input common-mode range extending to ground, and compatibility with 2.5V–5.5V single-supply systems requiring precision analog signal conditioning.
Technical Context
The OPA337NA/250G4 implements a unity-gain-stable CMOS input stage with rail-to-rail output architecture, enabling full dynamic range utilization in single-supply configurations. Its input common-mode voltage range extends from (V−) − 0.2V to (V+) − 1.2V, supporting ground-referenced inputs without phase inversion - critical for sensor interfacing and ADC driver stages.
It delivers 3MHz gain-bandwidth and 1.2V/µs slew rate at G = 1, with 26nV/√Hz input voltage noise density and 0.6fA/√Hz current noise density at 1kHz. The device maintains ≥100dB open-loop gain down to 5kΩ load and exhibits <0.001% THD+N at 1kHz under 3VPP output swing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz at G = 1 - supports stable closed-loop bandwidth up to ~2.8MHz in unity-gain buffer configuration. |
| Slew Rate | 1.2V/µs - enables clean 2V step response settling to 0.1% in 2µs with 100pF load. |
| Input Bias Current | ≤10pA max - preserves signal integrity in high-impedance photodiode and medical sensor front-ends. |
| Input Offset Voltage | ±3.5mV max over −40°C to +85°C - ensures DC accuracy in precision instrumentation amplifiers. |
| Supply Voltage Range | 2.5V to 5.5V - allows direct operation from Li-ion, coin-cell, or regulated 3.3V/5V rails without level-shifting. |
| Quiescent Current | 525µA per amplifier - enables multi-channel, always-on sensing in portable medical devices. |
| Output Swing | Within 125mV of rails (RL = 25kΩ) - maximizes usable dynamic range in single-supply data acquisition systems. |
Pinout & Package
SOT23-5 surface-mount package (DBV designator), 2.9mm × 1.6mm footprint, 1.0mm height, moisture sensitivity level (MSL) 1, peak reflow 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: V+ | Positive supply | Accepts 2.5V–5.5V single supply; requires local 0.01µF ceramic bypass to ground. |
| 2: −In | Inverting input | High-impedance CMOS node; bias current ≤10pA enables >100MΩ feedback networks. |
| 3: Output | Amplifier output | Rail-to-rail capable; drives 25kΩ load to within 125mV of V+ or V−. |
| 4: V− | Negative supply / Ground | Reference for single-supply operation; input common-mode includes ground. |
| 5: +In | Non-inverting input | High-impedance CMOS node; matched to −In for low input offset voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full-scale signal headroom in 3.3V or lower single-supply systems, eliminating need for dual supplies in portable instrumentation. |
| FET-input architecture | Enables ultra-low input bias current (≤10pA), critical for high-impedance transducer interfaces like photodiodes and pH electrodes. |
| Unity-gain stability | Guarantees stable operation without external compensation in G = 1 configurations - simplifies design of buffers and active filters. |
| Single-supply operation from 2.5V | Supports direct integration with modern low-voltage microcontrollers and ADCs, reducing system power conversion complexity. |
| Low 525µA quiescent current | Permits inclusion in always-on sensor nodes while maintaining sub-1µA sleep-state leakage when powered down via enable control. |
Applications
| Battery-Powered Instruments | Photodiode Pre-Amps |
|---|---|
Use Scenario: Portable multimeters, handheld gas analyzers, and wearable ECG monitors operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier conditioning low-level sensor outputs before ADC sampling. Use Value: 525µA quiescent current extends battery life; rail-to-rail output maximizes dynamic range on 3.3V supply; input common-mode to ground enables direct sensor grounding. | Use Scenario: Optical smoke detectors, pulse oximeters, and spectrophotometers using reverse-biased photodiodes. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal input loading. Use Value: ≤10pA input bias current prevents signal loss across high-value feedback resistors; 26nV/√Hz noise density preserves SNR in low-light conditions. |
| Medical Instruments | Driving ADCs |
Use Scenario: Portable blood glucose meters, infusion pump pressure sensors, and fetal Doppler ultrasound front-ends. IC Role / Device Role / Timing Role: Low-noise, low-drift signal conditioner interfacing biopotential or pressure transducers to SAR ADCs. Use Value: ±3.5mV max input offset ensures accurate baseline measurement; 3MHz GBW supports anti-aliasing filter implementation up to ~1MHz. | Use Scenario: Driving the input of 12-bit SAR ADCs such as ADS7822 in compact, low-power data acquisition modules. IC Role / Device Role / Timing Role: Buffer and level-shifter ensuring fast settling and full-scale drive capability into ADC sample-and-hold capacitance. Use Value: 2µs 0.1% settling time meets typical 1MSPS ADC requirements; rail-to-rail output guarantees full ADC code utilization without external reference scaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA337NA/3K | Same electrical specs and SOT23-5 package; differs only in tape-and-reel quantity (3000 vs 250 units). | No functional difference; intended for higher-volume production runs. | Select OPA337NA/3K for volume procurement where reel size and cost-per-unit optimization are priorities. |
| OPA344NA/250 | Higher 1MHz GBW, 0.8V/µs slew rate, 1.8V–5.5V supply, but 10x higher input bias current (100pA typ) and no guaranteed rail-to-rail output. | Less suitable for photodiode or high-Z sensor interfaces; better for general-purpose low-voltage buffering where speed is secondary. | Choose OPA344NA/250 only if supply voltage must extend down to 1.8V and rail-to-rail output is not required. |
Compared with OPA337NA/250G4, OPA337NA/3K offers identical performance in larger reels for production efficiency, while OPA344NA/250 trades FET-input precision and rail-to-rail output for wider supply range - making OPA337NA/250G4 the preferred choice for low-noise, high-impedance, single-supply precision signal conditioning.
Availability
OPA337NA/250G4 is available at Aetrix Electronics and suitable for battery-powered instruments, photodiode pre-amplifiers, and medical instrumentation requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for OPA337NA/250G4 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 low-power signal chain solutions.
The OPA337 series belongs to TI's MicroAmplifier™ family, engineered specifically for miniature, low-cost, single-supply applications demanding rail-to-rail output, ultra-low input bias current, and robust unity-gain stability - targeting portable and space-constrained instrumentation.
FAQ
What is the operating temperature range for the OPA337NA/250G4?
The OPA337NA/250G4 is specified for operation from −40°C to +85°C ambient temperature. Its absolute maximum ratings extend to −55°C to +125°C for storage and junction temperature, and it maintains full electrical performance across the entire −40°C to +85°C range per the datasheet's boldface limits. This makes OPA337NA/250G4 suitable for industrial and portable medical environments where thermal stability is critical.
Is the OPA337NA/250G4 unity-gain stable?
Yes, the OPA337NA/250G4 is explicitly unity-gain stable, as confirmed in the datasheet's "DESCRIPTION" and "APPLICATIONS INFORMATION" sections. Unlike the OPA338 series (optimized for G ≥ 5), the OPA337 series requires no external compensation for stable operation at G = 1 - enabling straightforward use in voltage followers, active filters, and precision buffers without risk of oscillation or phase inversion.
What package type does the OPA337NA/250G4 use?
The OPA337NA/250G4 uses the SOT23-5 surface-mount package (TI package designator DBV), measuring 2.9mm × 1.6mm with 1.0mm maximum height. It has a moisture sensitivity level (MSL) of 1 and is rated for peak reflow soldering at 260°C. This ultra-compact 5-pin package enables high-density PCB layouts in space-constrained applications such as wearable health monitors and handheld test equipment.
Does the OPA337NA/250G4 support rail-to-rail input?
No, the OPA337NA/250G4 does not support rail-to-rail input. Its input common-mode voltage range is specified from (V−) − 0.2V to (V+) − 1.2V - meaning it accepts inputs down to ground (enabling true single-supply operation) but cannot swing fully to the positive rail. However, its rail-to-rail *output* swing (within 125mV of both rails under 25kΩ load) ensures maximum signal fidelity in low-voltage systems.
What is the maximum capacitive load the OPA337NA/250G4 can drive stably?
The OPA337NA/250G4 is characterized for stable operation with up to 100pF capacitive load in unity-gain configuration, as shown in the "SMALL-SIGNAL STEP RESPONSE" and "SETTLING TIME" typical curves. Driving larger loads (e.g., ADC input capacitance >100pF) may require isolation resistance or careful layout; the datasheet does not specify unconditional stability beyond 100pF, so OPA337NA/250G4 designs should include series output resistance or verify phase margin when interfacing with heavy capacitive loads.
OPA337NA/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- SOT-23-5
OPA337NA/250G4 FAQ
1.How can I place an order for OPA337NA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA337NA/250G4 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 OPA337NA/250G4 reliable?
The price and inventory of OPA337NA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA337NA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA337NA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA337NA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA337NA/250G4?
OPA337NA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA337NA/250G4 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 OPA337NA/250G4?
For technical support, including OPA337NA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA337NA/250G4 requirements.
6.How does Aetrix verify that OPA337NA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA337NA/250G4 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 OPA337NA/250G4 meets industry standards.
7.What is the process for return or replacement of OPA337NA/250G4?
All OPA337NA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA337NA/250G4, 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 OPA337NA/250G4 part is unused and in its original packaging.
Return procedure for OPA337NA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA337NA/250G4 Tags
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