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Texas Instruments OPA337EA/2K5G4
- Part No.:
- OPA337EA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA337EA/2K5G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,664
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Product details
Overview
OPA337EA/2K5G4 from Texas Instruments is a single, rail-to-rail output CMOS operational amplifier in MSOP-8 package, unity-gain stable, with 3MHz gain-bandwidth, 1.2V/µs slew rate, 120dB open-loop gain, and 525µA quiescent current per amplifier. It operates from 2.5V to 5.5V single supply and delivers rail-to-rail output swing-ideal for low-power photodiode pre-amplification and battery-powered instrumentation.
For engineers reviewing the OPA337EA/2K5G4 datasheet, OPA337EA/2K5G4 pinout, OPA337EA/2K5G4 application, or OPA337EA/2K5G4 equivalent, key selection criteria include its FET-input (10pA max IB), input common-mode range extending to ground, ±0.5mV typical offset voltage, and compatibility with space-constrained, single-supply signal conditioning circuits requiring high DC precision and low power.
Technical Context
The OPA337EA/2K5G4 uses advanced CMOS process technology to achieve ultra-low input bias current (±0.2pA typ) while maintaining unity-gain stability and rail-to-rail output swing. Its input common-mode voltage range spans from (V−) − 0.2V to (V+) − 1.2V, enabling direct interface with grounded sensors in single-supply systems.
It features high open-loop gain (120dB), excellent PSRR (125µV/V) and CMRR (90dB), and maintains performance across 2.7V–5.5V supply range. The device avoids phase inversion and overload recovery issues common in older op amps, with 2µs overload recovery time and 2.5µs 0.01% settling time for 2V step.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - supports stable closed-loop operation up to ~300kHz at G = 10 without compensation. |
| Slew Rate | 1.2V/µs - enables clean 100kHz full-scale sine output with ≤1% distortion at 2Vpp. |
| Input Bias Current | ±0.2pA (typ) - preserves signal integrity in high-impedance photodiode and sensor interfaces. |
| Quiescent Current | 525µA per amplifier - allows continuous operation in multi-day battery-powered instruments. |
| Input Offset Voltage | ±0.5mV (typ) - ensures <10µV error in 20mV full-scale medical sensor front-ends. |
| Output Swing | Within 125mV of rails (RL = 25kΩ) - maximizes dynamic range in 3.3V ADC driver applications. |
| Supply Range | 2.5V to 5.5V - interoperable with Li-ion, coin-cell, and regulated 3.3V/5V system rails. |
Pinout & Package
OPA337EA/2K5G4 is packaged in an 8-pin MSOP (VSSOP) package (DGK), measuring 3.0mm × 3.0mm × 1.0mm, with exposed thermal pad for improved power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V− | Negative supply rail connection; referenced to ground in single-supply configurations. |
| 2 | +In | Non-inverting input; accepts signals down to V− − 0.2V, including ground-referenced sources. |
| 3 | −In | Inverting input; high-impedance node (10¹³Ω) suitable for precision feedback networks. |
| 4 | NC | No internal connection; left unconnected per TI design-no routing required. |
| 5 | NC | No internal connection; electrically isolated-may be used as guard trace or left floating. |
| 6 | Output | Rail-to-rail output capable of sourcing/sinking ±9mA into resistive loads. |
| 7 | V+ | Positive supply rail; bypassing with 0.01µF ceramic capacitor recommended near pin. |
| 8 | NC | No internal connection; no electrical function-no PCB trace needed. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full 3.1Vpp output on 3.3V supply-maximizes SNR when driving 12-bit ADCs. |
| FET-input architecture | 10pA max input bias current enables >1GΩ source impedance interfacing without significant error. |
| Unity-gain stability | Operates stably at G = 1 without external compensation-reduces BOM count and layout complexity. |
| Single-supply operation from 2.5V | Enables direct use with coin cells (CR2032) and low-voltage microcontrollers without level-shifting. |
| Input common-mode range includes ground | Allows direct connection of grounded transducers (e.g., thermistors, electret mics) without biasing resistors. |
Applications
| Photodiode Pre-Amplifier | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from reverse-biased photodiodes in portable spectrometers or pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1MΩ–100MΩ feedback resistor, converting photocurrent to voltage with minimal input loading. Use Value: Ultra-low 0.2pA input bias current prevents signal corruption; rail-to-rail output ensures full utilization of 3.3V ADC reference. | Use Scenario: Signal conditioning front-end in handheld multimeters or environmental data loggers running on AA/AAA batteries. IC Role / Device Role / Timing Role: Precision buffer and gain stage for thermistor, RTD, or bridge sensor outputs prior to ADC sampling. Use Value: 525µA quiescent current extends battery life beyond 12 months; ±0.5mV offset minimizes calibration drift over temperature. |
| Medical Sensor Interface | ADC Driver for Low-Voltage Systems |
Use Scenario: Front-end amplification for ECG electrode signals or pressure transducers in wearable health monitors. IC Role / Device Role / Timing Role: High-input-impedance, low-noise amplifier with DC-coupled input and AC-coupled output filtering. Use Value: Input common-mode range to ground eliminates need for input bias network; 26nV/√Hz noise density preserves small-signal fidelity. | Use Scenario: Driving SAR or sigma-delta ADC inputs in IoT edge nodes powered by 3.3V LDOs or energy harvesters. IC Role / Device Role / Timing Role: Output buffer isolating ADC input capacitance from preceding filter stages while maintaining settling accuracy. Use Value: 2.5µs 0.01% settling time meets 1Msps 12-bit ADC requirements; rail-to-rail swing matches ADC reference span. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA337UA/2K5 | SOIC-8 package (larger footprint, 5.0mm × 6.2mm), same electrical specs, same marking "OPA337UA". | Preferred for through-hole prototyping or legacy SOIC-based designs where board real estate is not constrained. | Select OPA337UA/2K5 when manual assembly, rework, or thermal mass tolerance is prioritized over miniaturization. |
| MCP6001T-E/OT | 500kHz GBW, 0.6V/µs slew rate, 100µA IQ, SOT-23-5 package-lower speed and power than OPA337EA/2K5G4. | Suitable for cost-sensitive, low-bandwidth sensor buffers where 3MHz bandwidth is unnecessary. | Choose MCP6001T-E/OT only for sub-100kHz applications where quiescent current <200µA is critical and performance margin can be reduced. |
Compared with OPA337UA/2K5, the OPA337EA/2K5G4 offers identical analog performance in a 40% smaller MSOP-8 footprint-critical for wearables and implantables. Against MCP6001T-E/OT, it delivers 6× higher bandwidth and 5× lower input bias current, justifying its use in precision photodiode and medical front-ends.
Availability
OPA337EA/2K5G4 is available at Aetrix Electronics and suitable for photodiode pre-amplifiers, battery-powered instrumentation, and medical sensor interfaces requiring stable component supply, long-lifecycle support, and guaranteed MSOP-8 packaging consistency.
Supply support for OPA337EA/2K5G4 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 decades of op amp innovation and broad manufacturing scale.
The OPA337 series belongs to TI's MicroAmplifier™ family, designed specifically for miniature, low-power, single-supply applications-including portable test equipment, medical diagnostics, and space-constrained industrial sensing.
FAQ
What is the operating temperature range for OPA337EA/2K5G4?
The OPA337EA/2K5G4 is specified for operation from −40°C to +85°C ambient temperature. Its absolute maximum junction temperature is 150°C, and storage temperature range is −55°C to +125°C. All electrical characteristics-including offset voltage, gain-bandwidth, and quiescent current-are guaranteed across the full −40°C to +85°C range per the SBOS077B datasheet.
Is OPA337EA/2K5G4 unity-gain stable?
Yes, the OPA337EA/2K5G4 is explicitly unity-gain stable, as confirmed in the device description and Applications Information section of the SBOS077B datasheet. It requires no external compensation for stable operation at closed-loop gains of 1 or greater, distinguishing it from the OPA338 series which is optimized for G ≥ 5.
What package type does OPA337EA/2K5G4 use?
The OPA337EA/2K5G4 uses the MSOP-8 (VSSOP) package with designation DGK, measuring 3.0mm × 3.0mm × 1.0mm and featuring an exposed thermal pad. This is distinct from the SOT-23-5 (DBV) and SOIC-8 (D) variants-confirmed in TI's Package Option Addendum and ordering table.
Does OPA337EA/2K5G4 support rail-to-rail input?
No, the OPA337EA/2K5G4 supports rail-to-rail *output* swing but has a limited input common-mode range: from (V−) − 0.2V to (V+) − 1.2V. While this includes ground (enabling true single-supply sensor interfacing), it does not extend to the positive rail-so full rail-to-rail *input* is not supported.
What is the part marking for OPA337EA/2K5G4?
The OPA337EA/2K5G4 is marked "G37" on the top surface of the MSOP-8 package, as documented in TI's Ordering Information table and Package Option Addendum. This marking is consistent across all OPA337EA variants in the DGK package.
OPA337EA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-VSSOP
OPA337EA/2K5G4 FAQ
1.How can I place an order for OPA337EA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA337EA/2K5G4 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 OPA337EA/2K5G4 reliable?
The price and inventory of OPA337EA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA337EA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA337EA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA337EA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA337EA/2K5G4?
OPA337EA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA337EA/2K5G4 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 OPA337EA/2K5G4?
For technical support, including OPA337EA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA337EA/2K5G4 requirements.
6.How does Aetrix verify that OPA337EA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA337EA/2K5G4 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 OPA337EA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA337EA/2K5G4?
All OPA337EA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA337EA/2K5G4, 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 OPA337EA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA337EA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA337EA/2K5G4 Tags
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