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Texas Instruments OPA237NA/250G4
- Part No.:
- OPA237NA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA237NA/250G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,116
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Product details
Overview
OPA237NA/250G4 from Texas Instruments is a single-channel, rail-to-rail output operational amplifier in the MicroAmplifier Series, designed for low-power, space-constrained 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 single supply - enabling use in battery-powered medical instruments and portable test equipment.
For engineers reviewing the OPA237NA/250G4 datasheet, OPA237NA/250G4 pinout, OPA237NA/250G4 application, or OPA237NA/250G4 equivalent, key selection criteria include its wide supply range, ground-swinging output (to within 10mV of V–), low bias current (–40nA max), and SOT-23-5 package compatibility with high-density PCB layouts.
Technical Context
The OPA237NA/250G4 employs a precision bipolar input stage enabling low input offset drift (±5µV/°C max) and high CMRR (86dB typ at 5V). Its unity-gain stable architecture supports capacitive loads up to 10,000pF when sourcing current - critical for driving ADC input filters or long traces in portable instrumentation.
Input common-mode range extends 0.2V below V– and to (V+) – 1.5V, allowing direct sensing of signals near ground in single-supply systems. Output swing reaches within 750mV of both rails at 10kΩ load, supporting full-scale signal conditioning without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7V to 36V single supply - enables direct operation from Li-ion batteries (3.0–4.2V) or industrial 24V rails without regulation. |
| Gain-Bandwidth Product | 1.5MHz - supports stable closed-loop gain ≥10 at 100kHz for sensor signal amplification in portable test gear. |
| Input Offset Voltage | ±750µV max at VS = 5V - ensures ≤0.75mV error in 1V full-scale measurements without trimming. |
| Quiescent Current | 350µA max per amplifier - allows >1000 hours runtime on a 350mAh coin cell in always-on medical monitors. |
| Output Swing | To within 10mV of V– and 750mV of V+ at 10kΩ - eliminates need for negative supply in low-side current sensing circuits. |
| Input Bias Current | –40nA max - minimizes voltage error across high-impedance pH or thermocouple sensor interfaces. |
| Common-Mode Rejection | 86dB typ at 5V - rejects >99.9% of 60Hz noise coupled into single-ended sensor lines. |
Pinout & Package
OPA237NA/250G4 is packaged in a 5-pin SOT-23 (DBV) surface-mount package - 1.6mm × 2.9mm footprint, 0.95mm height - optimized for ultra-compact portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Output | Amplified signal output; capable of sourcing 9.5mA or sinking 10mA into resistive loads. |
| 2: V– | Power | Negative (lowest) supply rail; input common-mode extends 0.2V below this pin. |
| 3: +IN | Input | Noninverting input; high-impedance (5TΩ || 2pF) node for precision sensor interfacing. |
| 4: –IN | Input | Inverting input; matched to +IN for low offset and drift in differential configurations. |
| 5: V+ | Power | Positive (highest) supply rail; supports up to 36V, enabling direct connection to unregulated industrial supplies. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Drives to within 10mV of V– and 750mV of V+ at 10kΩ - simplifies single-supply signal chain design by eliminating level shifters. |
| Ultra-low quiescent current | 350µA max - reduces power dissipation to <1.3mW at 3.6V, critical for battery longevity in handheld diagnostics. |
| Wide input common-mode range | Extends 0.2V below V– and to (V+) – 1.5V - enables direct measurement of ground-referenced transducer outputs. |
| High capacitive load drive | Stable with up to 10,000pF when sourcing - supports direct interface to anti-aliasing filters without isolation resistors. |
| Low input offset drift | ±5µV/°C max over –40°C to +85°C - maintains calibration stability across environmental temperature shifts in field-deployed instruments. |
Applications
| Battery-Powered Medical Monitors | Portable Test & Measurement Equipment |
|---|---|
Use Scenario: Amplifying low-level ECG or pulse oximetry sensor signals in handheld patient monitors powered by CR2032 cells. IC Role / Device Role / Timing Role: Single-supply signal conditioning amplifier with rail-to-ground output enabling direct ADC input without level-shifting. Use Value: 350µA quiescent current extends battery life beyond 1000 hours; ±750µV offset ensures sub-millivolt measurement accuracy. |
Use Scenario: Signal buffering and gain-setting in handheld multimeters and portable oscilloscope front-ends. IC Role / Device Role / Timing Role: Precision op amp providing stable gain, low noise (28nV/√Hz), and fast settling (16µs to 0.01%) for digitized waveform capture. Use Value: 1.5MHz GBW supports accurate AC signal amplification up to 100kHz; wide 2.7–36V supply accommodates multiple battery chemistries. |
| PCMCIA Card Signal Conditioning | Industrial Sensor Interface Modules |
Use Scenario: Front-end amplification for analog sensors embedded in legacy PCMCIA data acquisition cards operating from 3.3V or 5V rails. IC Role / Device Role / Timing Role: Space-optimized SOT-23-5 op amp delivering low-offset, low-drift amplification in tight card-edge layouts. Use Value: 1.6mm × 2.9mm footprint saves board area; ±5µV/°C drift maintains calibration across laptop thermal gradients. |
Use Scenario: Isolating and scaling 4–20mA loop signals or RTD bridge outputs in DIN-rail mounted condition monitoring modules. IC Role / Device Role / Timing Role: High-voltage-tolerant (36V) amplifier supporting direct connection to industrial 24V supply rails without LDO pre-regulation. Use Value: 36V absolute max rating and 86dB CMRR reject noise in electrically noisy factory environments; V–-extended input handles grounded sensor returns. |
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 (0.02µV/°C drift), lower offset (10µV max), but higher IQ (17µA) and narrower supply (1.8–5.5V). | Suitable for ultra-precision DC-coupled systems (e.g., weigh scales), not for 24V industrial or battery-life-critical designs. | Select OPA333AIDBVR only when µV-level drift is mandatory and supply is limited to ≤5.5V. |
| MCP6001T-E/OT | CMOS input (1pA IB), lower IQ (100µA), but reduced GBW (1MHz), lower PSRR (70dB), and no V–-extended input. | Better for high-impedance pH sensors; unsuitable for ground-referenced inputs or noisy 24V environments. | Choose MCP6001T-E/OT for ultra-low bias current needs where supply is 1.8–6V and ground-swinging input is not required. |
Compared with OPA333AIDBVR and MCP6001T-E/OT, the OPA237NA/250G4 uniquely balances wide supply range (2.7–36V), ground-swinging input/output, and ultra-low IQ (350µA) - making it optimal for battery-powered industrial and medical devices requiring robustness across voltage and temperature extremes.
Availability
OPA237NA/250G4 is available at Aetrix Electronics and suitable for battery-powered medical monitors, portable test equipment, PCMCIA card signal conditioning, and industrial sensor interface modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA237NA/250G4 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 OPA237NA/250G4 belongs to TI's MicroAmplifier Series - engineered specifically for space-constrained, low-power, single-supply applications including portable instrumentation and battery-operated medical devices.
FAQ
What is the maximum supply voltage for the OPA237NA/250G4?
The OPA237NA/250G4 supports an absolute maximum supply voltage of 36V between V+ and V– pins. It operates reliably across the recommended range of 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.
Does the OPA237NA/250G4 support rail-to-rail input operation?
No, the OPA237NA/250G4 does not support rail-to-rail input. Its input common-mode voltage range extends from (V–) – 0.2V to (V+) – 1.5V. While it accepts signals slightly below V–, it cannot handle inputs at or near V+ - limiting use in high-side sensing without attenuation or level-shifting networks.
What package type is used for the OPA237NA/250G4?
The OPA237NA/250G4 is supplied in a 5-pin SOT-23 (DBV) package measuring 1.6mm × 2.9mm with 0.95mm height. This ultra-miniature footprint is explicitly listed in TI's official documentation as one of two standard packages for the OPA237 family, alongside the SOIC-8 (D) variant.
Can the OPA237NA/250G4 drive large capacitive loads stably?
Yes - the OPA237NA/250G4 remains stable driving up to 10,000pF when sourcing current, and up to 4,000pF when sinking current. This capability is verified in TI's Stability-Capacitive Load vs Output Current characterization (Figure 6-2), making it suitable for direct connection to ADC input filters or long PCB traces without external isolation resistors.
What is the typical input offset voltage drift of the OPA237NA/250G4 over temperature?
The OPA237NA/250G4 exhibits a typical input offset voltage drift of ±5µV/°C over the –40°C to +85°C operating range, with a maximum of ±7.5µV/°C. This value is specified in Section 5.6 of the SBOS057B datasheet under Electrical Characteristics for VS = 5V and reflects production-tested parametric variation across temperature.
OPA237NA/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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/250G4 FAQ
1.How can I place an order for OPA237NA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA237NA/250G4 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/250G4 reliable?
The price and inventory of OPA237NA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA237NA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA237NA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA237NA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA237NA/250G4?
OPA237NA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA237NA/250G4 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/250G4?
For technical support, including OPA237NA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA237NA/250G4 requirements.
6.How does Aetrix verify that OPA237NA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA237NA/250G4 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/250G4 meets industry standards.
7.What is the process for return or replacement of OPA237NA/250G4?
All OPA237NA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA237NA/250G4, 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/250G4 part is unused and in its original packaging.
Return procedure for OPA237NA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA237NA/250G4 Tags
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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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