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Texas Instruments OPA337NA/3KG4
- Part No.:
- OPA337NA/3KG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA337NA/3KG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,118
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Product details
Overview
OPA337NA/3KG4 from Texas Instruments is a single, rail-to-rail output CMOS operational amplifier in SOT23-5 package, featuring 3MHz gain-bandwidth, 1.2V/µs slew rate, 120dB open-loop gain, ±3mV input offset voltage (max), and 525µA quiescent current per amplifier. It operates from 2.5V to 5.5V single supply and is unity-gain stable-ideal for photodiode pre-amplification in portable medical instruments.
For engineers reviewing the OPA337NA/3KG4 datasheet, OPA337NA/3KG4 pinout, OPA337NA/3KG4 application, or OPA337NA/3KG4 equivalent, key selection criteria include rail-to-rail output swing down to 125mV from rails, FET-input bias current ≤10pA, input common-mode range extending to ground, low THD+N (0.001% at 1kHz), and compatibility with space-constrained, battery-powered signal conditioning circuits.
Technical Context
The OPA337NA/3KG4 implements a CMOS input stage enabling ultra-low input bias current (≤10pA) and high input impedance (>10¹³Ω), supporting precision DC-coupled sensing. Its unity-gain stability and rail-to-rail output architecture allow full dynamic range utilization in single-supply systems without level-shifting circuitry.
Designed for low-voltage operation (2.5V min), it maintains specified performance across 2.7V–5.5V supply range, with input common-mode voltage spanning (V−) − 0.2V to (V+) − 1.2V and PSRR of 125µV/V at +25°C-enabling robust operation in noisy, battery-derived power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - supports stable closed-loop amplification up to ~300kHz at G = 10 without phase margin degradation. |
| Slew Rate | 1.2V/µs - enables clean 2Vpp step response within 2µs (0.1% settling) into 100pF load. |
| Input Bias Current | ≤10pA max - preserves signal integrity in high-impedance sensor interfaces like photodiodes or pH electrodes. |
| Quiescent Current | 525µA per amplifier - allows continuous operation for >1 year on a 200mAh coin cell in always-on instrumentation. |
| Input Offset Voltage | ±3.5mV max over −40°C to +85°C - ensures <0.1% gain error in 12-bit ADC driver applications. |
| Output Swing | 125mV from rail (RL = 25kΩ) - delivers >4.75Vpp output swing on 5V supply, maximizing ADC input utilization. |
| Supply Voltage Range | 2.5V to 5.5V - interoperable with Li-ion, Li-poly, and dual-AA battery systems without regulation. |
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−) | Negative supply | Ground reference for single-supply operation; accepts 0V; must be bypassed with 0.01µF ceramic capacitor. |
| 2 (−In) | Inverting input | High-impedance CMOS node; bias current ≤10pA enables use with MΩ-range feedback networks. |
| 3 (Out) | Amplifier output | Rail-to-rail capable; drives ≥25kΩ load to within 125mV of V+ or V− at room temperature. |
| 4 (V+) | Positive supply | Accepts 2.5V–5.5V; quiescent current remains stable across this range. |
| 5 (+In) | Non-inverting input | CMOS input with common-mode range including ground; enables true single-supply sensor buffering. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers usable output headroom down to 125mV from each rail, maximizing dynamic range in 3.3V or 5V systems. |
| FET-input architecture | Input bias current ≤10pA ensures minimal loading of high-impedance sources such as photodiodes or piezoelectric sensors. |
| Unity-gain stability | Operates unconditionally stable at G = 1 without external compensation, simplifying layout and reducing BOM count. |
| Low quiescent current | 525µA per amplifier enables multi-channel, always-on signal conditioning in portable devices with strict power budgets. |
| Single-supply operation from 2.5V | Eliminates need for split supplies in battery-powered equipment, reducing system cost and board area. |
Applications
| Photodiode Pre-Amplifier | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current signals from silicon photodiodes in pulse oximeters or environmental light sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal input loading and drift. Use Value: 10pA input bias current prevents signal loss; rail-to-rail output maximizes ADC resolution; 525µA IQ extends battery life. | Use Scenario: Signal conditioning front-end in handheld multimeters or portable ECG monitors. IC Role / Device Role / Timing Role: Precision buffer and gain stage interfacing analog sensors to low-power microcontrollers. Use Value: 2.5V minimum supply enables direct connection to partially discharged batteries; ±3.5mV offset ensures <0.1% measurement error. |
| Medical Instrumentation | Driving ADCs |
Use Scenario: Front-end amplification in implantable or wearable biosensors requiring long-term stability and low power. IC Role / Device Role / Timing Role: Low-drift, low-noise amplifier for biopotential acquisition (e.g., EEG, EMG). Use Value: 26nV/√Hz input voltage noise and 0.001% THD+N preserve signal fidelity; −55°C to +125°C operating range supports sterilization cycles. | Use Scenario: Driving SAR or delta-sigma ADC inputs in data acquisition modules with 12-bit+ resolution. IC Role / Device Role / Timing Role: Output buffer isolating ADC input from source impedance variations and ensuring fast settling. Use Value: 2µs 0.1% settling time into 100pF load meets timing requirements for 500ksps sampling; rail-to-rail swing avoids clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA344NA/3K | Higher GBW (1MHz vs 3MHz), same SOT23-5 package, 1.5V/µs slew rate, 450µA IQ. | Lower bandwidth limits use in higher-frequency sensor interfaces; better suited for sub-100kHz DC-coupled applications. | Select OPA344NA/3K only when bandwidth demand is <1MHz and lowest possible IQ (450µA) is critical. |
| MCP6001T-E/OT | 1MHz GBW, 0.6V/µs slew rate, 100µA IQ, rail-to-rail I/O, same SOT23-5 footprint. | Lower speed and drive capability; optimized for ultra-low-power, not precision; offset voltage ±3mV (typ), not guaranteed max. | Choose MCP6001T-E/OT for cost-sensitive, sub-100kHz applications where 100µA IQ outweighs bandwidth and precision needs. |
Compared with OPA344NA/3K and MCP6001T-E/OT, the OPA337NA/3KG4 delivers superior small-signal bandwidth (3MHz) and slew rate (1.2V/µs) while maintaining ultra-low input bias current (≤10pA)-making it optimal for photodiode pre-amplifiers and precision battery-powered instrumentation where both speed and input impedance matter.
Availability
OPA337NA/3KG4 is available at Aetrix Electronics and suitable for photodiode pre-amplifiers, battery-powered instrumentation, and medical instrumentation requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for OPA337NA/3KG4 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.
FAQ
What is the maximum operating temperature range for the OPA337NA/3KG4?
The OPA337NA/3KG4 is specified for operation from −40°C to +85°C ambient temperature, with an extended operating range up to +125°C and storage range from −55°C to +125°C. This makes the OPA337NA/3KG4 suitable for industrial and medical environments where thermal reliability is essential. The device's thermal resistance (θJA) is 200°C/W in the SOT23-5 package.
Is the OPA337NA/3KG4 unity-gain stable?
Yes, the OPA337NA/3KG4 is explicitly unity-gain stable, as confirmed in the official Texas Instruments datasheet SBOS077B. It requires no external compensation when configured as a buffer (G = 1) or in inverting/non-inverting configurations with gain ≥1. This eliminates risk of oscillation in low-gain sensor interface circuits and simplifies PCB layout.
What is the input common-mode voltage range of the OPA337NA/3KG4?
The input common-mode voltage range of the OPA337NA/3KG4 spans from (V−) − 0.2V to (V+) − 1.2V, which includes ground when operated from a single supply. This allows direct interfacing with grounded sensors (e.g., thermistors, resistive bridges) without level-shifting circuitry. At 5V supply, the usable input range is −0.2V to +3.8V.
Can the OPA337NA/3KG4 drive capacitive loads?
The OPA337NA/3KG4 can drive moderate capacitive loads, but stability depends on load magnitude and configuration. The datasheet shows overshoot increases above 100pF in unity-gain step response. For loads >100pF, isolation resistor (e.g., 10–50Ω) between output and capacitance is recommended. It is not characterized for direct driving of >500pF loads without external compensation.
What is the part marking for OPA337NA/3KG4 on the SOT23-5 package?
The OPA337NA/3KG4 is marked with "C37" on the top surface of its SOT23-5 (DBV) package, as documented in TI's ordering information table and package addendum. This marking is consistent across all tape-and-reel variants of the OPA337NA series in SOT23-5 format, including OPA337NA/250 and OPA337NA/3K.
OPA337NA/3KG4 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/3KG4 FAQ
1.How can I place an order for OPA337NA/3KG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA337NA/3KG4 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/3KG4 reliable?
The price and inventory of OPA337NA/3KG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA337NA/3KG4 is usually 5 days.
3.What payment methods are accepted for OPA337NA/3KG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA337NA/3KG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA337NA/3KG4?
OPA337NA/3KG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA337NA/3KG4 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/3KG4?
For technical support, including OPA337NA/3KG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA337NA/3KG4 requirements.
6.How does Aetrix verify that OPA337NA/3KG4 is sourced from the original manufacturer or authorized distributors?
All OPA337NA/3KG4 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/3KG4 meets industry standards.
7.What is the process for return or replacement of OPA337NA/3KG4?
All OPA337NA/3KG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA337NA/3KG4, 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/3KG4 part is unused and in its original packaging.
Return procedure for OPA337NA/3KG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA337NA/3KG4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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