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Texas Instruments OPA237NA/250
- Part No.:
- OPA237NA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA237NA/250.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,310
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Product details
Overview
OPA237NA/250 from Texas Instruments is a single-channel, rail-to-rail output operational amplifier in the MicroAmplifier Series, designed for space-constrained, single-supply applications. It delivers 1.5MHz gain-bandwidth, ±750µV max input offset voltage at 5V supply, 350µA max quiescent current, and operates from 2.7V to 36V. It is used in battery-powered medical instruments and portable test equipment where low power and wide supply range are critical.
For engineers reviewing the OPA237NA/250 datasheet, OPA237NA/250 pinout, OPA237NA/250 application, or OPA237NA/250 equivalent, key selection considerations include its SOT-23-5 package footprint, ground-swinging output (to within 10mV of V–), input common-mode range extending below ground, and verified stability with up to 10,000pF capacitive loads when sourcing current.
Technical Context
The OPA237NA/250 uses a bipolar input stage enabling low input bias current (–40nA max) and high input impedance (5TΩ common-mode). Its unity-gain stable architecture supports precision DC-coupled amplification and low-distortion signal conditioning across its full 2.7V–36V supply range.
It features rail-to-rail output swing (within 10mV of V– and 0.75V of V+ at RL = 10kΩ), wide input common-mode range (V– – 0.2V to V+ – 1.5V), and integrated ESD protection per JEDEC JS-001. Thermal performance is characterized for both SOIC-8 and SOT-23-5 packages, with RθJA = 180.4°C/W (SOIC) and 115.8°C/W (SOT-23).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7V to 36V single supply - enables direct integration into 3.3V, 5V, 12V, and 24V systems without level-shifting. |
| Gain-Bandwidth Product | 1.5MHz - supports stable closed-loop operation up to ~100kHz at G = 10 with adequate phase margin. |
| Input Offset Voltage | ±750µV max at VS = 5V - ensures ≤0.075% error in 1V full-scale measurement circuits. |
| Quiescent Current | 350µA max per amplifier - allows >10-year battery life in 10µA sleep-current portable devices. |
| Output Swing | To within 10mV of V– and 0.75V of V+ (RL = 10kΩ) - supports true single-supply sensing near ground reference. |
| Input Common-Mode Range | V– – 0.2V to V+ – 1.5V - accepts signals below ground, critical for low-side current sensing. |
| Capacitive Load Drive | Stable with up to 10,000pF when sourcing current - eliminates need for isolation resistors in ADC driver or filter stages. |
Pinout & Package
OPA237NA/250 is supplied in the 5-pin SOT-23-5 (DBV) package - ultra-miniature surface-mount format occupying one-fourth the area of an SOIC-8. Pinout is optimized for minimal PCB real estate and high-density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - rail-to-rail capable, sinks up to 10mA, sources up to 9.5mA. |
| 2 | V– | Negative supply terminal - lowest potential rail; input common-mode extends 0.2V below this pin. |
| 3 | +IN | Noninverting input - high-impedance (5TΩ || 2pF), low bias current (–40nA max). |
| 4 | –IN | Inverting input - matched to +IN for precision differential gain configurations. |
| 5 | V+ | Positive supply terminal - highest potential rail; supports up to 36V operation. |
Key Features
| Feature | Design Value |
|---|---|
| Micro-size packaging | SOT-23-5 footprint (2.9mm × 1.6mm) reduces board area by 75% vs SOIC-8, ideal for PCMCIA cards and wearable sensors. |
| Ground-swinging output | Drives to within 10mV of V– - enables accurate zero-volt referenced signal conditioning in single-supply systems. |
| Wide input common-mode range | Extends 0.2V below V– - supports direct connection to shunt resistors in low-side current sensing without level shifters. |
| Low quiescent current | 350µA max - allows continuous operation in coin-cell–powered devices with multi-year battery life. |
| Unity-gain stable | No external compensation required - simplifies design of buffers, active filters, and transimpedance amplifiers. |
Applications
| Battery-Powered Medical Sensors | Portable Test Equipment |
|---|---|
Use Scenario: Amplifying microvolt-level ECG or pulse oximetry sensor outputs in handheld diagnostic devices. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with low noise (28nV/√Hz) and sub-mV offset. Use Value: Enables accurate biopotential measurement without AC coupling or offset trimming, reducing component count and calibration steps. | Use Scenario: Signal conditioning and buffering in handheld multimeters and portable oscilloscope probes. IC Role / Device Role / Timing Role: Rail-to-rail output buffer driving 10kΩ ADC inputs while operating from 3.3V or 9V batteries. Use Value: Maintains full dynamic range across supply voltage variations, eliminating gain errors during battery discharge. |
| PCMCIA Data Acquisition Cards | Industrial Sensor Interface Modules |
Use Scenario: Analog front-end for compact PCMCIA-format data loggers interfacing thermocouples and strain gauges. IC Role / Device Role / Timing Role: Low-power, space-optimized op amp providing gain, filtering, and level shifting in tight card-edge layouts. Use Value: SOT-23-5 package fits within 8mm card height constraints while delivering 1.5MHz bandwidth for 10ksps sampling. | Use Scenario: Signal conditioning for 4–20mA loop-powered transmitters in remote industrial nodes. IC Role / Device Role / Timing Role: Single-supply amplifier accepting inputs below ground and driving ratiometric ADC references. Use Value: Eliminates need for dual supplies or charge pumps, reducing BOM cost and improving long-term reliability in harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Zero-drift architecture; 10µV max offset; 17µA quiescent current; 350kHz GBW. | Better DC accuracy but lower bandwidth; suited for ultra-low-offset sensor interfaces, not medium-speed signal chains. | Select OPA333AIDBVR only when offset drift <0.05µV/°C is mandatory and bandwidth ≤350kHz suffices. |
| LMV321IDBVR | CMOS input; 7V max supply; 60µA IQ; 1MHz GBW; rail-to-rail I/O. | Lower power and cost, but limited supply range and higher offset (±900µV); not suitable for 12V+ or precision 5V systems. | Choose LMV321IDBVR for cost-sensitive, low-voltage (<7V) consumer applications where 1MHz bandwidth meets requirements. |
Compared with OPA333AIDBVR and LMV321IDBVR, the OPA237NA/250 uniquely balances wide 2.7V–36V operation, 1.5MHz bandwidth, and µV-level offset in a 5-pin SOT-23 - making it the only option among the three viable for battery-powered industrial test gear requiring both headroom and precision.
Availability
OPA237NA/250 is available at Aetrix Electronics and suitable for battery-powered medical instruments, portable test equipment, and PCMCIA data acquisition cards requiring stable component supply, long-lifecycle support, and consistent parametric performance across temperature and voltage.
Supply support for OPA237NA/250 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, embedded processing, and connectivity technologies, with over 50 years of innovation in precision amplifiers and power management ICs.
The OPA237NA/250 belongs to TI's MicroAmplifier Series - engineered specifically for space-constrained, single-supply, battery-operated applications such as portable instrumentation and medical sensors where size, power, and precision must coexist.
FAQ
What is the maximum supply voltage rating for the OPA237NA/250?
The OPA237NA/250 has an absolute maximum supply voltage (V+ to V–) of 36V. It is rated for continuous operation from 2.7V to 36V single supply or ±1.35V to ±18V dual supply. Exceeding 36V may cause permanent damage, and operation above 36V voids warranty and reliability guarantees per TI's SBOS057B datasheet.
Does the OPA237NA/250 support rail-to-rail input operation?
No, the OPA237NA/250 does not support rail-to-rail input. Its input common-mode voltage range is specified from (V–) – 0.2V to (V+) – 1.5V. While it accepts inputs slightly below V– (enabling low-side current sensing), it cannot accept signals within 1.5V of V+. This differs from true rail-to-rail input op amps like the OPA333.
Can the OPA237NA/250 drive a 10nF capacitive load stably?
Yes, the OPA237NA/250 is unity-gain stable and can drive ≥10nF capacitive loads without external compensation. Per TI's stability characterization, it remains stable with up to 10,000pF when sourcing current and up to 4,000pF when sinking current - far exceeding 10nF. No series resistor or isolation is required for typical ADC input or RC filter applications.
What is the thermal resistance (RθJA) of the OPA237NA/250 in its SOT-23-5 package?
The junction-to-ambient thermal resistance (RθJA) for the OPA237NA/250 in the DBV (SOT-23-5) package is 115.8°C/W, as measured per JEDEC JESD51-2 with standard 2-layer board layout. This value assumes no copper pour or thermal vias; adding 1-in² copper on top and bottom layers can reduce effective RθJA by ~30–40°C/W.
Is the OPA237NA/250 pin-compatible with other members of the OPAx237 family?
Yes, the OPA237NA/250 shares identical pinout and electrical specifications with the SOIC-8 variant (OPA237D), enabling drop-in replacement between packages. Both use the same functional pin mapping: Pin 1 = OUT, Pin 2 = V–, Pin 3 = +IN, Pin 4 = –IN, Pin 5 = V+. The dual-channel OPA2237 uses a different pinout and is not pin-compatible.
OPA237NA/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 8.5 nA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 200µA
- Current - Output / Channel:
- 8 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
OPA237NA/250 FAQ
1.How can I place an order for OPA237NA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA237NA/250 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 OPA237NA/250 reliable?
The price and inventory of OPA237NA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA237NA/250 is usually 5 days.
3.What payment methods are accepted for OPA237NA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA237NA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA237NA/250?
OPA237NA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA237NA/250 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 OPA237NA/250?
For technical support, including OPA237NA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA237NA/250 requirements.
6.How does Aetrix verify that OPA237NA/250 is sourced from the original manufacturer or authorized distributors?
All OPA237NA/250 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 OPA237NA/250 meets industry standards.
7.What is the process for return or replacement of OPA237NA/250?
All OPA237NA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA237NA/250, 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 OPA237NA/250 part is unused and in its original packaging.
Return procedure for OPA237NA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA237NA/250 Tags
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