My Inquiry
My Account
Texas Instruments OPA237UA
- Part No.:
- OPA237UA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA237UA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,520
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA237UA from Texas Instruments is a single-channel, rail-to-rail output operational amplifier in SOIC-8 package, designed for single-supply battery-powered systems. 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 enables precision signal conditioning in portable medical instruments and PCMCIA cards.
For engineers reviewing the OPA237UA datasheet, OPA237UA pinout, OPA237UA application, or OPA237UA equivalent, key selection criteria include its wide supply range (2.7V–36V), low quiescent current (≤350µA), rail-to-rail output swing within 10mV of ground, and confirmed SOIC-8 packaging with validated pin functions for single-supply sensor interfaces and portable instrumentation.
Technical Context
The OPA237UA uses a bipolar input stage enabling low input bias current (≤–40nA) and high common-mode rejection (≥76dB at 5V). Its unity-gain stable architecture supports capacitive loads up to 10,000pF when sourcing current, making it suitable for driving ADC input buffers and sensor signal chains without external compensation.
Input common-mode range extends 0.2V below V– and up to 1.5V below V+, allowing operation with inputs near ground on single supplies. Output swings to within 10mV of V– and within 0.75V of V+ under 10kΩ load, supporting true single-supply interfacing with microcontrollers and low-voltage data converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7V to 36V single supply - enables direct use with Li-ion, 9V batteries, and industrial 24V rails without regulation |
| Gain-Bandwidth Product | 1.5MHz - supports stable amplification of DC–100kHz signals in sensor front-ends and active filters |
| 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 >10-year battery life in always-on portable devices drawing <1mA total |
| Output Swing | Within 10mV of V– and 0.75V of V+ at RL = 10kΩ - enables direct interfacing with 3.3V/5V ADCs and logic inputs |
| Input Bias Current | –40nA max - minimizes voltage error across high-impedance sources like thermistors and pH electrodes |
| Common-Mode Rejection | 76dB min at VS = 5V - rejects power supply ripple and shared-noise coupling in compact PCB layouts |
Pinout & Package
OPA237UA is supplied in an 8-pin SOIC (D) package, measuring 4.9mm × 3.9mm × 1.45mm, rated for –40°C to +85°C operation. Thermal resistance RθJA is 180.4°C/W, requiring minimal copper area for thermal management in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives loads up to 10kΩ while maintaining rail-to-rail swing and stability with ≥100pF capacitance |
| 2 | –IN | Inverting input - accepts differential or single-ended signals; high impedance (5MΩ || 4pF) minimizes loading on source |
| 3 | +IN | Noninverting input - used for unity-gain buffers or high-impedance sensing; CMVR extends 0.2V below V– |
| 4 | V– | Negative supply terminal - connects to ground or negative rail; reference for input common-mode and output swing |
| 5 | NC | No connect - internally unconnected; must remain floating or tied to ground per layout best practices |
| 6 | OUT | Amplifier output - duplicate of Pin 1 in dual-package variants; not present in OPA237UA (single-channel) |
| 7 | V+ | Positive supply terminal - accepts up to 36V; PSRR of 10–30µV/V suppresses supply noise in noisy environments |
| 8 | NC | No connect - internally unconnected; must remain floating or tied to ground per layout best practices |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Reaches within 10mV of V– and 0.75V of V+ at 10kΩ load - eliminates need for level-shifting circuitry in single-supply systems |
| Wide single-supply range | Operates from 2.7V to 36V - supports direct connection to unregulated battery stacks and industrial power rails |
| Low quiescent current | 350µA max - enables multi-year operation in coin-cell–powered portable diagnostics and wearables |
| Unity-gain stable | Drives ≥10,000pF capacitive loads when sourcing - simplifies interface to long traces, ADC inputs, and LCD drivers |
| Extended input common-mode range | Accepts signals 0.2V below V– - permits accurate ground-referenced sensing without level-shifting resistors |
Applications
| Battery-Powered Instrumentation | Portable Medical Devices |
|---|---|
Use Scenario: Handheld blood glucose meters and pulse oximeters powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Signal conditioning amplifier for analog sensor outputs prior to 12-bit ADC sampling. Use Value: 350µA quiescent current extends battery life beyond 2 years; rail-to-rail output ensures full ADC dynamic range utilization. | Use Scenario: Wearable ECG monitors with dry-electrode front-ends and Bluetooth LE transmission. IC Role / Device Role / Timing Role: Low-noise, low-drift amplifier for biopotential signal acquisition before digitization. Use Value: ±750µV max offset voltage limits baseline drift in DC-coupled leads; 1.5MHz GBW preserves QRS complex fidelity. |
| PCMCIA Card Interfaces | Industrial Test Equipment |
Use Scenario: Compact data-acquisition modules inserted into laptop PCMCIA slots for field calibration. IC Role / Device Role / Timing Role: Input buffer and gain stage for external sensor probes connected via mini-DIN connectors. Use Value: 2.7V–36V supply range accommodates both 3.3V host power and external 24V transducer excitation without LDOs. | Use Scenario: Benchtop multimeters and portable oscilloscope front-ends requiring precision DC amplification. IC Role / Device Role / Timing Role: High-accuracy, low-drift amplifier in auto-ranging voltage measurement paths. Use Value: 76dB CMRR rejects common-mode noise from shared AC mains grounds; 0.45V/µs slew rate supports fast overrange recovery. |
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; optimized for ultra-low-power, sub-100kHz precision apps | Select for µV-level offset-critical sensor nodes where bandwidth <100kHz suffices |
| LMV321IDBVR | CMOS input; 7mV max offset; 80µA quiescent current; 1MHz GBW; rail-to-rail I/O | Higher offset, lower supply range (2.7V–5.5V); better for cost-sensitive, low-voltage consumer apps | Select for 3.3V-only systems prioritizing cost and ultra-low IQ over precision and wide supply range |
Compared with OPA333AIDBVR and LMV321IDBVR, the OPA237UA uniquely balances 1.5MHz bandwidth, ±750µV offset, and 2.7V–36V operation - making it the only choice among the three for battery-powered test gear requiring both precision and wide supply adaptability.
Availability
OPA237UA is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and industrial test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA237UA 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 decades of op amp innovation and broad manufacturing scale.
The OPA237UA belongs to TI's MicroAmplifier series, engineered specifically for space-constrained, single-supply applications such as PCMCIA cards, portable diagnostics, and battery-operated instrumentation where size, power, and precision intersect.
FAQ
What is the maximum supply voltage rating for the OPA237UA?
The OPA237UA has an absolute maximum supply voltage (VS = V+ – V–) of 36V. Operation beyond this rating may cause permanent damage. The recommended operating range is 2.7V to 36V, verified across all production units and documented in Section 5.1 and 5.2 of the SBOS057B datasheet. This makes the OPA237UA suitable for both low-voltage portable systems and higher-voltage industrial sensors.
Does the OPA237UA support rail-to-rail input operation?
No, the OPA237UA does not support rail-to-rail input. Its input common-mode voltage range extends from (V– – 0.2V) to (V+ – 1.5V), meaning it accepts signals up to 0.2V below the negative rail but only up to 1.5V below the positive rail. This design enables robust performance with bipolar input stages while retaining wide supply flexibility. For true rail-to-rail input, consider TI's OPA320 series.
What packages are available for the OPA237UA?
The OPA237UA is offered exclusively in the 8-pin SOIC (D) package per TI's official orderable information and mechanical drawings. While the broader OPAx237 family includes SOT-23-5 (DBV) variants, the "UA" suffix specifically denotes the SOIC-8 variant. This is confirmed in TI's Package Option Addendum and Device Information table, where OPA237UA maps to package D (SOIC, 8).
Can the OPA237UA drive capacitive loads reliably?
Yes, the OPA237UA is unity-gain stable and can drive up to 10,000pF when sourcing current - typical in single-supply configurations where the load connects to ground. When sinking current, it remains stable up to 4,000pF. These values are validated in Figure 6-2 (Stability-Capacitive Load vs Output Current) and Section 6.1.2 of the SBOS057B datasheet, making it suitable for driving ADC inputs, long cables, and LCD bias networks without external isolation resistors.
What is the guaranteed input offset voltage specification for OPA237UA at 5V supply?
The OPA237UA guarantees a maximum input offset voltage of ±750µV at VS = 5V and TA = 25°C, as specified in Section 5.6 of the SBOS057B datasheet. This value is production-tested and applies across the full operating temperature range (–40°C to +85°C), with a typical drift of ±5µV/°C. It reflects actual device performance, not a design limit or typical-only value.
OPA237UA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 8-SOIC
OPA237UA FAQ
1.How can I place an order for OPA237UA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA237UA 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 OPA237UA reliable?
The price and inventory of OPA237UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA237UA is usually 5 days.
3.What payment methods are accepted for OPA237UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA237UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA237UA?
OPA237UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA237UA 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 OPA237UA?
For technical support, including OPA237UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA237UA requirements.
6.How does Aetrix verify that OPA237UA is sourced from the original manufacturer or authorized distributors?
All OPA237UA 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 OPA237UA meets industry standards.
7.What is the process for return or replacement of OPA237UA?
All OPA237UA units undergo pre-shipment inspection (PSI). If there is an issue with OPA237UA, 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 OPA237UA part is unused and in its original packaging.
Return procedure for OPA237UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA237UA Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
