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Texas Instruments OPA337UAG4
- Part No.:
- OPA337UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA337UAG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,689
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Product details
Overview
OPA337UAG4 from Texas Instruments is a rail-to-rail output, unity-gain stable CMOS operational amplifier in SOIC-8 package. It delivers 3MHz gain-bandwidth, 1.2V/µs slew rate, 120dB open-loop gain, 10pA max input bias current, and operates from 2.5V to 5.5V single supply-ideal for photodiode pre-amplification in battery-powered medical instruments.
For engineers reviewing the OPA337UAG4 datasheet, OPA337UAG4 pinout, OPA337UAG4 application, or OPA337UAG4 equivalent, key selection criteria include rail-to-rail output swing (≤125mV from rail), low quiescent current (525µA/amp), FET-input architecture, G = 1 stability, and −40°C to +85°C temperature range compliance.
Technical Context
The OPA337UAG4 uses advanced CMOS process technology to achieve ultra-low input bias current (±10pA max) while maintaining high-speed performance. Its input common-mode voltage range includes ground (−0.2V to V+−1.2V), enabling true single-supply operation without level-shifting circuitry.
As a unity-gain stable amplifier, it features no phase inversion under overdrive and maintains 100dB open-loop gain down to 5kΩ load. The SOIC-8 package supports standard surface-mount assembly with JEDEC-compliant MSL Level-2-260°C-1 year reflow profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz at G = 1 - enables stable amplification of audio-band and sensor signals up to ~300kHz closed-loop bandwidth |
| Slew Rate | 1.2V/µs - supports 2Vpp signals at ≤600kHz without slew-induced distortion |
| Input Bias Current | ±10pA max - preserves signal integrity in high-impedance photodiode and pH electrode interfaces |
| Quiescent Current | 525µA per amplifier - allows dual-channel operation on coin-cell or 3.3V LDO supplies |
| Output Swing | ≤125mV from rail (RL = 25kΩ) - maximizes dynamic range in 3.3V or 5V systems |
| Open-Loop Gain | 120dB typ - ensures <0.001% gain error in precision transimpedance configurations |
| Supply Voltage Range | 2.5V to 5.5V - compatible with Li-ion, USB, and industrial 3.3V/5V rails without regulation |
Pinout & Package
OPA337UAG4 is housed in an 8-pin SOIC (D) package with standard JEDEC outline, 1.27mm pitch, and exposed pad not present. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (−In) | High-impedance node accepting feedback or signal source; requires guarding in sensitive transimpedance designs |
| 2 | Non-Inverting Input (+In) | CMOS input with ±10pA bias; connects directly to reference or sensor without loading |
| 3 | Output | Rail-to-rail capable output driving ≥25kΩ loads; limited sourcing/sinking to ±9mA |
| 4 | V− (Ground or Negative Supply) | Reference return for single-supply operation; must be low-impedance with 0.01µF ceramic bypass |
| 5 | NC | No internal connection; left unconnected per TI design - no routing or grounding required |
| 6 | NC | No internal connection; electrically isolated - no PCB trace or thermal pad needed |
| 7 | V+ (Positive Supply) | Accepts 2.5V–5.5V; requires local 0.01µF ceramic decoupling to minimize PSRR degradation |
| 8 | NC | No internal connection; unused terminal - no electrical or mechanical tie required |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range in 3.3V systems: outputs within 125mV of V+ and V− rails under 25kΩ load |
| FET-input architecture | Enables photodiode pre-amplifiers with >1GΩ effective input impedance and sub-pA leakage paths |
| Unity-gain stability | Operates reliably at G = 1 without external compensation - simplifies filter and buffer designs |
| Single-supply operation | Input common-mode range includes ground (−0.2V), eliminating need for negative rail or level shifters |
| Low quiescent power | Draws only 525µA at 5V - supports always-on sensing nodes in portable medical devices |
Applications
| Photodiode Pre-Amplifier | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from silicon photodiodes in pulse oximeters or spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal noise and offset drift. Use Value: 10pA max input bias current prevents signal loss; rail-to-rail output maximizes ADC utilization in 3.3V systems. | Use Scenario: Signal conditioning front-end in handheld multimeters or portable ECG monitors. IC Role / Device Role / Timing Role: Low-power buffer and gain stage interfacing sensors to SAR ADCs. Use Value: 525µA quiescent current extends battery life; 2.5V minimum supply enables direct Li-ion (3.0–4.2V) operation. |
| Medical Sensor Interface | Audio System Line Driver |
Use Scenario: Front-end amplification for pH electrodes or thermopile-based temperature sensors. IC Role / Device Role / Timing Role: High-input-impedance voltage follower isolating high-Z sensors from downstream circuitry. Use Value: Input CMVR includes ground, allowing direct connection to unbiased electrode sources without DC blocking. | Use Scenario: Driving line-level audio signals into 10kΩ loads in portable speakers or headphone amps. IC Role / Device Role / Timing Role: Unity-gain buffer providing low-output-impedance drive and THD+N <0.001% at 1kHz. Use Value: 120dB open-loop gain ensures <0.001% gain error; rail-to-rail swing preserves headroom in 5V audio rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA340UA | Higher GBW (5.5MHz), same SOIC-8, 1.5V/µs slew rate, 500µA IQ | Better for higher-frequency sensor signals (>500kHz); slightly higher power | Select when wider bandwidth is required without changing layout or supply constraints |
| MCP6001T-I/OT | SOT23-5, 1MHz GBW, 0.6V/µs slew, 100µA IQ, rail-to-rail I/O | Lower power and smaller footprint but reduced speed and drive capability | Choose for ultra-low-power space-constrained designs where 3MHz bandwidth is unnecessary |
Compared with OPA337UAG4, OPA340UA offers higher bandwidth for faster settling in data acquisition, while MCP6001T-I/OT trades speed for 81% lower quiescent current and 40% smaller footprint-making each suitable for distinct trade-offs in precision, power, and size.
Availability
OPA337UAG4 is available at Aetrix Electronics and suitable for battery-powered instrumentation, photodiode pre-amplifiers, and medical sensor interfaces requiring stable component supply across extended production lifecycles.
Supply support for OPA337UAG4 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™ portfolio, designed specifically for miniature, low-power, precision signal conditioning in space- and energy-constrained applications such as portable medical devices and sensor nodes.
FAQ
What is the maximum operating temperature range for the OPA337UAG4?
The OPA337UAG4 is specified for operation from −40°C to +85°C ambient temperature. Its absolute maximum junction temperature is 150°C, and storage temperature range matches the operating range at −55°C to +125°C. Thermal resistance θJA is 150°C/W for the SOIC-8 package, requiring appropriate PCB copper area for sustained full-load operation.
Does the OPA337UAG4 require external compensation for unity-gain operation?
No, the OPA337UAG4 is unity-gain stable and does not require external compensation capacitors. It is explicitly characterized and guaranteed for stable operation at G = 1 across the full −40°C to +85°C temperature range and 2.5V–5.5V supply range. This eliminates design complexity in buffer and transimpedance configurations.
Can the OPA337UAG4 drive capacitive loads such as ADC input capacitance?
The OPA337UAG4 can drive moderate capacitive loads, but stability depends on load value and configuration. For loads >100pF, isolation resistors (e.g., 10–50Ω) between amplifier output and capacitor are recommended. TI's typical curves show overshoot increases above 100pF; for 10-bit+ SAR ADCs with 10–20pF inputs, direct connection is robust and widely used.
What is the input common-mode voltage range of the OPA337UAG4?
The input common-mode voltage range of the OPA337UAG4 is −0.2V to (V+) − 1.2V at TA = −40°C to +85°C. This includes ground, enabling true single-supply operation with inputs referenced to system ground. Inputs may exceed this range by up to ±0.5V without damage, but phase inversion is avoided only within the specified CMVR.
Is the OPA337UAG4 pin-compatible with other SOIC-8 op-amps like the LM358?
No, the OPA337UAG4 is not pin-compatible with LM358 or other legacy dual op-amps. Its SOIC-8 pinout is unique: pins 1/2/3/4 are −In/+In/Out/V−, while pins 5/6/7/8 are NC/NC/V+/NC. LM358 uses pins 1/2/3/4 for OutA/−InA/+InA/V− and 5/6/7/8 for +InB/−InB/OutB/V+. Layout redesign is required for substitution.
OPA337UAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 8-SOIC
OPA337UAG4 FAQ
1.How can I place an order for OPA337UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA337UAG4 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 OPA337UAG4 reliable?
The price and inventory of OPA337UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA337UAG4 is usually 5 days.
3.What payment methods are accepted for OPA337UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA337UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA337UAG4?
OPA337UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA337UAG4 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 OPA337UAG4?
For technical support, including OPA337UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA337UAG4 requirements.
6.How does Aetrix verify that OPA337UAG4 is sourced from the original manufacturer or authorized distributors?
All OPA337UAG4 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 OPA337UAG4 meets industry standards.
7.What is the process for return or replacement of OPA337UAG4?
All OPA337UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA337UAG4, 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 OPA337UAG4 part is unused and in its original packaging.
Return procedure for OPA337UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA337UAG4 Tags
-
LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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