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Texas Instruments OPA2337UA/2K5G4
- Part No.:
- OPA2337UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2337UA/2K5G4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,970
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Product details
Overview
OPA2337UA/2K5G4 from Texas Instruments is a dual, rail-to-rail output CMOS operational amplifier in SOIC-8 package, unity-gain stable, with 3MHz gain-bandwidth, 1.2V/µs slew rate, 120dB open-loop gain, and 525µA per amplifier quiescent current. It operates from 2.5V to 5.5V single supply and is used in photodiode pre-amplifiers and battery-powered instrumentation.
For engineers reviewing the OPA2337UA/2K5G4 datasheet, OPA2337UA/2K5G4 pinout, OPA2337UA/2K5G4 application, or OPA2337UA/2K5G4 equivalent, key selection criteria include rail-to-rail output swing (≤125mV from rail), FET-input bias current (≤10pA), input common-mode range including ground, low THD+N (0.001% at 1kHz), and dual-channel independence for low crosstalk in space-constrained analog front-ends.
Technical Context
The OPA2337UA/2K5G4 implements a CMOS input stage enabling ultra-low input bias current (±0.2pA typical) and high input impedance (>10¹³ Ω), supporting high-impedance sensor interfaces like photodiodes. Its rail-to-rail output stage delivers full-swing capability into 25kΩ loads with ≤125mV headroom at 5V supply.
Designed for unity-gain stability, it avoids phase inversion and maintains performance across its −40°C to +85°C operating range. The dual architecture features completely independent amplifiers-no shared bias networks-ensuring <0.3µV/V channel separation and minimal interaction during overload or overdrive conditions.
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 accurate reproduction of 2Vpp signals up to ~190kHz without slew-induced distortion |
| Input Bias Current | ±10pA max - preserves signal integrity in high-impedance transducer interfaces (e.g., >1MΩ feedback networks) |
| Open-Loop Gain | 120dB - ensures <0.0025% gain error in precision buffer or gain-of-10 configurations |
| Quiescent Current | 525µA per amplifier - allows dual-channel operation from coin-cell or single Li-ion supplies with sub-1.1mW total dissipation at 5V |
| Input Voltage Range | Includes ground (−0.2V to V+−1.2V) - simplifies single-supply design without level-shifting circuitry |
| THD+N | 0.001% at 1kHz - meets audio-grade line-driver and ADC driver requirements for 12-bit+ systems |
Pinout & Package
OPA2337UA/2K5G4 is housed in an 8-pin SOIC (D) surface-mount package with standard 1.27mm pitch and 3.9mm × 4.9mm body dimensions. Thermal resistance θJA is 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply rail connection for both amplifiers; accepts 2.5V–5.5V single supply |
| 2 | Out A | Output of Amplifier A; rail-to-rail swing (≤125mV from V− or V+) into 25kΩ load |
| 3 | −In A | Inverting input of Amplifier A; FET-input with ≤10pA bias current |
| 4 | +In A | Non-inverting input of Amplifier A; common-mode range includes ground |
| 5 | +In B | Non-inverting input of Amplifier B; electrically isolated from Amplifier A |
| 6 | −In B | Inverting input of Amplifier B; independent bias network ensures <0.3µV/V channel separation |
| 7 | Out B | Output of Amplifier B; fully independent output stage prevents crosstalk during overload |
| 8 | V− | Negative supply rail (typically ground in single-supply use); reference for both amplifiers |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range to downstream ADCs or comparators without level-shifting circuitry |
| FET-input architecture | Enables direct interface with high-impedance sources (e.g., photodiodes, pH electrodes) without signal degradation |
| Unity-gain stability | Eliminates need for external compensation in buffer, gain-of-2, or gain-of-10 configurations |
| Dual independent amplifiers | Prevents inter-channel coupling during overdrive, enabling simultaneous signal conditioning in compact data acquisition systems |
| Single-supply operation down to 2.5V | Supports direct integration with 2.7V–5.5V microcontrollers and low-voltage ADCs in portable medical devices |
Applications
| Photodiode Pre-Amplifier | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from reverse-biased photodiodes in optical smoke detectors or pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier with high-Z input and rail-to-rail output driving 12-bit SAR ADCs. Use Value: 10pA input bias minimizes dark-current error; 3MHz GBW supports >100kHz modulation bandwidth in synchronous detection. | Use Scenario: Signal conditioning in handheld multimeters or portable ECG monitors powered by CR2032 cells. IC Role / Device Role / Timing Role: Dual-channel sensor interface: one amp buffers reference voltage, the other amplifies biopotential signals. Use Value: 525µA per amplifier enables >100-hour battery life; rail-to-rail output maximizes ADC utilization without external biasing. |
| Medical Instrument Front-End | ADC Driver for Low-Power Data Acquisition |
Use Scenario: Conditioning low-level bio-signals (e.g., EEG, EMG) in Class II medical devices requiring low noise and high CMRR. IC Role / Device Role / Timing Role: First-stage gain and filtering amplifier with DC-coupled input and 90dB CMRR at DC. Use Value: 120dB open-loop gain ensures stable gain accuracy; input common-mode range including ground simplifies electrode biasing. | Use Scenario: Driving the input of micropower ADCs like ADS7822 in space-constrained industrial sensors. IC Role / Device Role / Timing Role: Precision buffer isolating ADC input from source impedance variations and PCB trace capacitance. Use Value: 0.001% THD+N preserves SNR in 12-bit systems; SOIC-8 footprint allows layout alongside MSOP-8 ADCs without area penalty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2340UA/2K5 | Higher GBW (5.5MHz), higher IQ (750µA/amp), same SOIC-8 package and unity-gain stability | Better for higher-frequency sensor interfaces (e.g., ultrasonic receivers) where speed outweighs power budget | Select when >3MHz bandwidth is required and quiescent current increase is acceptable |
| MCP6022-I/SN | Lower GBW (10MHz), higher IQ (1mA/amp), same rail-to-rail I/O, but CMOS input bias current is 1pA (lower than OPA2337's 10pA max) | Preferred for ultra-high-impedance pH or ion-selective electrode circuits where sub-pA bias is critical | Select when input bias current <1pA is mandatory and 10MHz GBW suffices |
Compared with OPA2340UA/2K5 and MCP6022-I/SN, the OPA2337UA/2K5G4 offers the optimal balance of 3MHz bandwidth, 525µA quiescent current, and 10pA input bias in a production-qualified SOIC-8 package-making it ideal for cost-sensitive, battery-operated instrumentation where moderate speed and ultra-low power are jointly prioritized.
Availability
OPA2337UA/2K5G4 is available at Aetrix Electronics and suitable for photodiode pre-amplifiers, battery-powered instrumentation, and medical instrument front-ends requiring stable component supply, long-term manufacturability, and TI-qualified automotive-grade reliability.
Supply support for OPA2337UA/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The OPA2337UA/2K5G4 belongs to TI's MicroAmplifier™ series, designed specifically for miniature, low-power, single-supply analog signal conditioning in space- and energy-constrained applications such as portable medical devices and sensor nodes.
FAQ
What is the operating temperature range for the OPA2337UA/2K5G4?
The OPA2337UA/2K5G4 is specified for operation from −40°C to +85°C, with extended storage and junction temperature ranges up to +125°C. This range supports deployment in industrial environments and portable consumer devices without thermal derating. All key parameters-including input offset voltage, CMRR, and open-loop gain-are guaranteed across this full range, ensuring consistent performance in field applications.
Is the OPA2337UA/2K5G4 unity-gain stable?
Yes, the OPA2337UA/2K5G4 is explicitly unity-gain stable, as confirmed in the device's datasheet (SBOS077B). It requires no external compensation for stable operation at gains of 1, 2, or 10. This eliminates the need for feedback capacitors or gain-setting resistors beyond basic configuration, simplifying layout and reducing bill-of-materials cost in buffer and gain-stage designs.
What is the maximum supply voltage for the OPA2337UA/2K5G4?
The absolute maximum supply voltage for the OPA2337UA/2K5G4 is 7.5V, but the recommended operating range is 2.5V to 5.5V. Operation above 5.5V risks parametric shift and reduced reliability. Within the 2.5V–5.5V range, all specifications-including GBW, slew rate, and THD+N-are maintained, enabling flexible integration with 3.3V or 5V system rails.
Does the OPA2337UA/2K5G4 support rail-to-rail input?
No, the OPA2337UA/2K5G4 supports rail-to-rail *output* only. Its input common-mode voltage range extends from (V−) − 0.2V to (V+) − 1.2V, meaning it includes ground but does not reach the positive rail. For true rail-to-rail input, consider alternatives like the OPA2320 or TLV2462. However, the included-ground range simplifies single-supply biasing for most sensor interfaces.
What package type and marking does the OPA2337UA/2K5G4 use?
The OPA2337UA/2K5G4 uses an 8-pin SOIC (D) package with standard 1.27mm pitch and is marked "OPA 2337UA" on the top surface. The "G4" suffix denotes a specific tape-and-reel packaging variant (2500 units per reel, Q1 pin-1 quadrant), compliant with JEDEC standards and RoHS requirements. Thermal resistance θJA is 150°C/W.
OPA2337UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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
OPA2337UA/2K5G4 FAQ
1.How can I place an order for OPA2337UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2337UA/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 OPA2337UA/2K5G4 reliable?
The price and inventory of OPA2337UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2337UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA2337UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2337UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2337UA/2K5G4?
OPA2337UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2337UA/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 OPA2337UA/2K5G4?
For technical support, including OPA2337UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2337UA/2K5G4 requirements.
6.How does Aetrix verify that OPA2337UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA2337UA/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 OPA2337UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA2337UA/2K5G4?
All OPA2337UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2337UA/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 OPA2337UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA2337UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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