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Texas Instruments OPA337EA/2K5
- Part No.:
- OPA337EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA337EA/2K5.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,102
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Product details
Overview
OPA337EA/2K5 from Texas Instruments is a rail-to-rail output, unity-gain stable CMOS operational amplifier in MSOP-8 package, featuring 3MHz gain-bandwidth, 1.2V/µs slew rate, 120dB open-loop gain, 10pA max input bias current, and operation from 2.5V to 5.5V single supply - optimized for photodiode pre-amplification and battery-powered instrumentation.
For engineers reviewing the OPA337EA/2K5 datasheet, OPA337EA/2K5 pinout, OPA337EA/2K5 application, or OPA337EA/2K5 equivalent, key selection criteria include rail-to-rail output swing (≤125mV from rails), low quiescent current (525µA/amp), FET-input precision, microSIZE packaging, and G = 1 stability without external compensation.
Technical Context
The OPA337EA/2K5 employs advanced CMOS process technology to achieve ultra-low input bias current (±10pA max) while maintaining high-speed performance and rail-to-rail output capability. Its input common-mode range extends to ground (−0.2V below V−), enabling true single-supply operation in sensor interface circuits.
As a unity-gain stable amplifier, it delivers consistent 3MHz bandwidth and 1.2V/µs slew rate across the full 2.5V–5.5V supply range, with open-loop gain ≥100dB at 5kΩ load and output swing within 125mV of both rails under specified conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz at G = 1 - enables stable amplification of signals up to ~300kHz with 10x gain margin. |
| Slew Rate | 1.2V/µs - supports clean 100kHz full-scale output transitions with ≤0.1% distortion. |
| Input Bias Current | ±10pA max - preserves signal integrity in high-impedance photodiode and sensor front-ends. |
| Supply Voltage Range | 2.5V to 5.5V - compatible with Li-ion, coin-cell, and regulated 3.3V systems without level-shifting. |
| Output Swing | Within 125mV of rails (RL = 25kΩ) - maximizes dynamic range in low-voltage ADC driver applications. |
| Quiescent Current | 525µA per amplifier - enables multi-channel, always-on sensing with sub-1mA total system bias. |
| Open-Loop Gain | 120dB typical - ensures <0.001% gain error in precision DC-coupled configurations. |
Pinout & Package
OPA337EA/2K5 is housed in an 8-pin MSOP (VSSOP) package (DGK), measuring 3.0mm × 3.0mm × 1.0mm, with exposed thermal pad for enhanced power dissipation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−In) | Differential input node; high-impedance CMOS input requiring guarded layout for pA-level bias current. |
| 2 | Non-Inverting Input (+In) | Differential input node; referenced to ground or bias network in single-supply sensor interfaces. |
| 3 | Output | Rail-to-rail output capable of sourcing/sinking ±9mA; drives 25kΩ loads to within 125mV of rails. |
| 4 | V− (Ground) | Power return for single-supply operation; must be low-impedance connection to minimize noise coupling. |
| 5 | V+ | Positive supply rail (2.5V–5.5V); requires local 0.01µF ceramic bypass capacitor per TI recommendation. |
| 6–8 | No Connection (NC) | Unbonded pins; electrically isolated and must remain unconnected on PCB. |
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 IB allows direct interfacing with >1GΩ source impedances (e.g., photodiodes, pH electrodes). |
| Unity-gain stable | Eliminates need for external compensation components in buffer, gain-of-one, or active filter designs. |
| MicroSIZE MSOP-8 package | Reduces board area by 75% vs SO-8, critical for portable medical and handheld test equipment. |
| Single-supply operation down to 2.5V | Supports direct integration with ultra-low-power MCUs and energy-harvesting power rails. |
Applications
| Photodiode Pre-Amplifier | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from reverse-biased silicon photodiode in portable spectrometer. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal input loading. Use Value: 10pA max input bias current prevents signal corruption; rail-to-rail output maximizes dynamic range into 12-bit ADC. | Use Scenario: Signal conditioning front-end in handheld multimeter with 200-hour battery life. IC Role / Device Role / Timing Role: Precision buffer and gain stage for thermocouple and RTD inputs. Use Value: 525µA quiescent current enables multi-channel analog front-end without compromising runtime. |
| Medical Sensor Interface | ADC Driver for Low-Voltage Systems |
Use Scenario: Biopotential acquisition in wearable ECG patch with dry electrodes. IC Role / Device Role / Timing Role: High-input-impedance amplifier rejecting electrode offset drift and motion artifacts. Use Value: Input common-mode range including ground allows direct AC-coupled electrode connection without bias resistors. | Use Scenario: Driving ADS7822 12-bit SAR ADC in 2.7V–5V data acquisition module. IC Role / Device Role / Timing Role: Output buffer isolating ADC input capacitance from preceding filter stage. Use Value: 1.2V/µs slew rate settles 2V step in 2µs (0.1%), meeting 100ksps sampling requirements. |
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 | SOT23-5 package (5-pin), same electrical specs, no NC pins. | Smaller footprint but no thermal pad; lower power dissipation capability. | Select when board space is more constrained than thermal performance requirements. |
| OPA340UA/2K5 | Higher GBW (8MHz), higher IQ (750µA), same MSOP-8 package and rail-to-rail output. | Better for higher-frequency signal chains (e.g., audio preamps), less suitable for ultra-low-power designs. | Choose when bandwidth >3MHz is required and quiescent current budget allows +225µA increase. |
Compared with OPA337NA/3K, OPA337EA/2K5 offers superior thermal performance via MSOP-8 exposed pad, while OPA340UA/2K5 trades 2.3× higher bandwidth for 43% higher supply current - making OPA337EA/2K5 optimal for precision, low-power, space-limited sensor interfaces.
Availability
OPA337EA/2K5 is available at Aetrix Electronics and suitable for battery-powered instruments, photodiode pre-amplifiers, and medical sensor interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for OPA337EA/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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The OPA337 series belongs to TI's MicroAmplifier™ family, designed specifically for miniature, low-power, precision analog signal conditioning in space- and energy-constrained applications.
FAQ
What is the operating temperature range for OPA337EA/2K5?
The OPA337EA/2K5 is specified for operation from −40°C to +85°C, with absolute maximum ratings extending to −55°C to +125°C for storage and junction temperature. This range supports deployment in industrial environments and portable consumer devices where ambient temperatures may fluctuate significantly during use or storage.
Does OPA337EA/2K5 require external compensation for unity-gain stability?
No, the OPA337EA/2K5 is internally compensated for unity-gain stability and operates reliably with closed-loop gains of 1 without external components. This eliminates design risk associated with phase margin tuning and simplifies layout in buffer, follower, and active filter configurations where G = 1 is required.
What is the maximum capacitive load OPA337EA/2K5 can drive without instability?
The OPA337EA/2K5 can safely drive up to 100pF capacitive load while maintaining stability and specified settling time (2µs for 0.1%). For loads exceeding 100pF, TI recommends adding a small series resistor (e.g., 10–50Ω) between the output and capacitive node to isolate the amplifier from excessive phase shift.
How does the input common-mode voltage range of OPA337EA/2K5 support single-supply operation?
The OPA337EA/2K5 features an input common-mode range from (V−) − 0.2V to (V+) − 1.2V, which includes ground when V− = 0V. This allows direct connection of sensors referenced to ground - such as photodiodes or thermistors - without level-shifting circuitry, simplifying single-supply system design and reducing component count.
Is OPA337EA/2K5 pin-compatible with other op amps in the OPA337 family?
Yes, all MSOP-8 variants of the OPA337 series - including OPA337EA/2K5, OPA337UA/2K5, and OPA337EA/250 - share identical pinouts and footprints. This enables drop-in replacement across temperature grades and packaging options without PCB redesign, provided thermal and sourcing requirements are met.
OPA337EA/2K5 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/2K5 FAQ
1.How can I place an order for OPA337EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA337EA/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 OPA337EA/2K5 reliable?
The price and inventory of OPA337EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA337EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA337EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA337EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA337EA/2K5?
OPA337EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA337EA/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 OPA337EA/2K5?
For technical support, including OPA337EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA337EA/2K5 requirements.
6.How does Aetrix verify that OPA337EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA337EA/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 OPA337EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA337EA/2K5?
All OPA337EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA337EA/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 OPA337EA/2K5 part is unused and in its original packaging.
Return procedure for OPA337EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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