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Texas Instruments OPA2337PA
- Part No.:
- OPA2337PA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA2337PA.pdf
- Description:
- IC CMOS 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:443
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Product details
Overview
OPA2337PA from Texas Instruments is a dual, rail-to-rail output CMOS operational amplifier in an 8-pin PDIP 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 low-power photodiode pre-amplifiers and battery-powered instrumentation.
For engineers reviewing the OPA2337PA datasheet, OPA2337PA pinout, OPA2337PA application, or OPA2337PA equivalent, this page delivers verified electrical parameters, dual-channel pin mapping for DIP-8, rail-to-rail output swing behavior, input bias current ≤10pA, and selection guidance against functionally comparable dual CMOS op amps.
Technical Context
The OPA2337PA implements a CMOS input stage enabling ultra-low input bias current (≤10pA) and rail-to-rail output swing within 125mV of each rail at 25kΩ load. Its unity-gain stability supports direct use in buffers and gain-of-one configurations without external compensation.
It features independent dual amplifiers with no crosstalk interaction, input common-mode range extending to ground (−0.2V), and operation down to 2.5V supply-making it suitable for single-supply systems where signal headroom and power efficiency are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - supports stable closed-loop bandwidth up to 3MHz at unity gain for sensor signal conditioning. |
| Slew Rate | 1.2V/µs - enables accurate reproduction of signals with <2µs settling time for 2V steps. |
| Input Bias Current | ≤10pA max - preserves high-impedance source integrity in photodiode and medical electrode interfaces. |
| Open-Loop Gain | 120dB - ensures <0.001% gain error in precision DC-coupled amplification stages. |
| Quiescent Current | 525µA per amplifier - allows dual-channel operation from coin-cell or 3V microcontroller rails. |
| Supply Voltage Range | 2.5V to 5.5V - compatible with Li-ion, 3.3V, and 5V logic domains without level-shifting. |
| Output Swing | Rail-to-rail - delivers full dynamic range into ADC drivers and audio line-level circuits. |
Pinout & Package
OPA2337PA is housed in an 8-pin plastic dual in-line package (PDIP-8) with through-hole mounting. Pin 1 is located at the top-left corner when the notch faces upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input A | High-impedance node for differential feedback configuration of Amplifier A. |
| 2 | Non-inverting Input A | Accepts high-Z sensor signals (e.g., photodiode cathode) without loading. |
| 3 | Output A | Delivers rail-to-rail voltage swing to drive ADC inputs or low-power transducers. |
| 4 | V− (Ground) | Reference return for both amplifiers; connects to system ground plane. |
| 5 | Output B | Independent rail-to-rail output for second signal path (e.g., reference channel). |
| 6 | Non-inverting Input B | Second high-Z input for dual-sensor or differential pair applications. |
| 7 | Inverting Input B | Feedback node for Amplifier B; electrically isolated from Amplifier A. |
| 8 | V+ | Single positive supply rail (2.5V–5.5V); bypass with 0.01µF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Swings within 125mV of V+ and V− at 25kΩ load-maximizes usable dynamic range in 3V systems. |
| FET-input architecture | 10pA max input bias current enables direct connection to high-impedance sources like photodiodes. |
| Unity-gain stable | No external compensation required for G = 1 configurations-reduces BOM count and layout area. |
| Low quiescent current | 525µA per amplifier allows dual-channel operation in battery-powered devices with >1-year runtime. |
| Input common-mode range includes ground | Accepts 0V-referenced signals without level-shifting-simplifies single-supply front-end design. |
Applications
| Photodiode Pre-Amplifier | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Amplifying weak current from reverse-biased photodiodes in portable pulse oximeters or environmental light sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal input loading and offset drift. Use Value: 10pA input bias current prevents signal loss; rail-to-rail output drives 12-bit ADCs directly at 3V supply. | Use Scenario: Signal conditioning and buffering in handheld multimeters or portable gas analyzers. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage for analog sensor outputs prior to microcontroller ADC sampling. Use Value: 525µA per amplifier enables two independent channels on a single 3V coin cell; unity-gain stability eliminates compensation components. |
| Medical Electrode Interface | ADC Driver for Low-Power Data Acquisition |
Use Scenario: Front-end amplification of biopotential signals (ECG, EEG) in wearable diagnostic patches. IC Role / Device Role / Timing Role: High-input-impedance, low-noise amplifier rejecting common-mode interference while preserving DC accuracy. Use Value: Input common-mode range to ground supports single-supply electrode biasing; 120dB open-loop gain ensures <0.001% gain error. | Use Scenario: Driving SAR ADC inputs (e.g., ADS7822) in space-constrained, micropower data loggers. IC Role / Device Role / Timing Role: Output buffer isolating ADC sample-and-hold input from upstream filter stages. Use Value: Rail-to-rail swing matches 0–VREF ADC input range; 2µs 0.1% settling meets 100ksps sampling requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual CMOS op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2340UA | Higher GBW (5.5MHz), higher IQ (750µA), SO-8 only; same rail-to-rail output and CMOS input. | Better for higher-frequency sensor interfaces (>100kHz), but increases power draw in battery-critical designs. | Select OPA2340UA when bandwidth >3MHz is required and supply current budget allows +225µA per channel. |
| MCP6022-I/P | Lower GBW (10MHz), lower IQ (1mA), DIP-8 package; rail-to-rail I/O, but input common-mode does not include ground. | Requires input biasing network for ground-referenced signals; better for cost-sensitive industrial controls than medical-grade sensing. | Choose MCP6022-I/P for non-ground-referenced AC-coupled applications where 10MHz bandwidth justifies higher IQ and reduced DC precision. |
Compared with OPA2337PA, OPA2340UA offers higher bandwidth at increased quiescent current, while MCP6022-I/P trades ground-sensing capability for broader commercial temperature range and lower unit cost-neither is pin-compatible, requiring PCB redesign.
Availability
OPA2337PA is available at Aetrix Electronics and suitable for battery-powered instrumentation, photodiode pre-amplifiers, and medical electrode interfaces requiring stable component supply across extended product lifecycles.
Supply support for OPA2337PA 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 and embedded processing technologies, with over 90 years of innovation in precision signal chain solutions.
The OPA2337PA belongs to TI's MicroAmplifier™ series, designed specifically for miniature, low-power, single-supply applications where rail-to-rail performance, ultra-low input bias, and space-constrained packaging are essential.
FAQ
What is the maximum operating supply voltage for the OPA2337PA?
The OPA2337PA has an absolute maximum supply voltage rating of 7.5V, but its specified operating range is 2.5V to 5.5V. Operation above 5.5V voids parametric guarantees and risks reliability degradation. For robust long-term use in battery-powered systems, maintain V+ between 2.7V and 5.5V as validated in the datasheet's electrical characteristics tables.
Does the OPA2337PA support rail-to-rail input common-mode voltage?
No-the OPA2337PA supports rail-to-rail *output* swing but not rail-to-rail *input*. Its input common-mode voltage range extends from (V−) − 0.2V to (V+) − 1.2V. At V+ = 5V and V− = 0V, valid input voltages are −0.2V to +3.8V. Inputs beyond this range may cause phase inversion or increased bias current, though they remain within absolute maximum ratings.
Can the OPA2337PA drive capacitive loads without oscillation?
The OPA2337PA is unity-gain stable and can safely drive ≥100pF loads without external compensation, as confirmed by small-signal step response testing in the datasheet. For loads >500pF, add a 10Ω–50Ω series resistor at the output to isolate capacitance and preserve phase margin-this is standard practice for CMOS op amps driving ADC input capacitors or long PCB traces.
Is the OPA2337PA pin-compatible with other dual op amps in PDIP-8 packages?
No-OPA2337PA uses a nonstandard pinout: Pin 1 = Inverting Input A, Pin 2 = Non-inverting Input A, Pin 3 = Output A, Pin 4 = V−, Pin 5 = Output B, Pin 6 = Non-inverting Input B, Pin 7 = Inverting Input B, Pin 8 = V+. This differs from industry-standard dual op amp pinouts (e.g., LM358, TL072), so direct replacement requires PCB layout modification.
What is the typical input offset voltage drift of the OPA2337PA over temperature?
The OPA2337PA exhibits a typical input offset voltage drift of ±2µV/°C, as specified in the Electrical Characteristics table. Production distribution data shows >95% of units fall within ±3.5µV/°C across −40°C to +85°C. This low drift supports stable DC gain accuracy in medical and instrumentation applications where thermal gradients affect long-term calibration.
OPA2337PA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
OPA2337PA FAQ
1.How can I place an order for OPA2337PA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2337PA 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 OPA2337PA reliable?
The price and inventory of OPA2337PA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2337PA is usually 5 days.
3.What payment methods are accepted for OPA2337PA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2337PA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2337PA?
OPA2337PA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2337PA 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 OPA2337PA?
For technical support, including OPA2337PA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2337PA requirements.
6.How does Aetrix verify that OPA2337PA is sourced from the original manufacturer or authorized distributors?
All OPA2337PA 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 OPA2337PA meets industry standards.
7.What is the process for return or replacement of OPA2337PA?
All OPA2337PA units undergo pre-shipment inspection (PSI). If there is an issue with OPA2337PA, 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 OPA2337PA part is unused and in its original packaging.
Return procedure for OPA2337PA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2337PA Tags
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