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Texas Instruments OPA2237UAG4
- Part No.:
- OPA2237UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2237UAG4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,280
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Product details
Overview
OPA2237UAG4 from Texas Instruments is a dual-channel, single-supply operational amplifier in the MicroAmplifier Series, featuring 750 µV max input offset voltage (at VS = 5 V), 1.5 MHz gain-bandwidth product, and 350 µA max quiescent current per amplifier. It operates from 2.7 V to 36 V single supply or ±1.35 V to ±18 V dual supply, with rail-to-rail output swing within 10 mV of ground-ideal for battery-powered medical instruments and portable test equipment.
For engineers reviewing the OPA2237UAG4 datasheet, OPA2237UAG4 pinout, OPA2237UAG4 application, or OPA2237UAG4 equivalent, key selection criteria include its dual-channel SOIC-8 package, low-offset precision at wide supply range, stability with capacitive loads up to 10,000 pF when sourcing, and guaranteed operation from –40°C to +85°C.
Technical Context
The OPA2237UAG4 integrates two fully independent amplifiers in a single SOIC-8 package, eliminating crosstalk and enabling simultaneous signal conditioning paths. Its input common-mode range extends 0.2 V below V– and up to 1.5 V below V+, supporting true single-supply operation with ground-referenced inputs.
It delivers unity-gain stability and supports high-precision DC-coupled applications via low input bias current (–40 nA max), low drift (±5 µV/°C max), and 86 dB typical CMRR at 5 V supply-enabling accurate sensing in low-power, space-constrained systems without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Dual - enables independent signal paths in one package, reducing board area vs discrete singles |
| Supply Range | 2.7 V to 36 V single supply - supports direct integration into 3.3 V, 5 V, and 24 V industrial/battery systems |
| Input Offset Voltage | ±750 µV max at VS = 5 V - ensures <1 mV error in 1× gain configurations without trimming |
| Gain-Bandwidth Product | 1.5 MHz - supports stable closed-loop operation up to ~100 kHz at G = 10 with phase margin >60° |
| Quiescent Current | 350 µA max per amplifier - enables multi-channel precision amplification in sub-1 mA total system power budgets |
| Output Swing | Within 10 mV of ground and 0.75 V of V+ (RL = 100 kΩ) - allows full-scale ADC interfacing with single-supply rails |
| Capacitive Load Drive | Up to 10,000 pF when sourcing - eliminates need for isolation resistors in sensor buffer or DAC output stages |
Pinout & Package
OPA2237UAG4 is packaged in an 8-pin SOIC (D package), 3.9 mm × 4.9 mm body, with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or next stage; capable of sourcing up to 9.5 mA |
| 2 | –IN A | Inverting input for channel A - used in inverting configurations or feedback networks |
| 3 | +IN A | Noninverting input for channel A - accepts signals down to 0.2 V below V–, enabling ground-referenced sensing |
| 4 | V– | Negative supply rail - connects to system ground or negative rail; common reference for both amplifiers |
| 5 | +IN B | Noninverting input for channel B - electrically isolated from channel A; supports dual-sensor interfaces |
| 6 | –IN B | Inverting input for channel B - independent bias path; no interaction with channel A |
| 7 | OUT B | Amplifier B output - sinks up to 10 mA; complements OUT A for differential or parallel processing |
| 8 | V+ | Positive supply rail - supplies both amplifiers; PSRR of 30 µV/V minimizes supply noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output near ground | Swings to within 10 mV of V–, enabling direct interface with 0 V referenced ADCs or microcontroller inputs |
| Wide single-supply range | 2.7 V to 36 V operation eliminates need for level-shifting in mixed-voltage systems (e.g., 3.3 V MCU + 24 V sensor) |
| Low quiescent current | 350 µA per amplifier allows dual-channel precision amplification in battery-operated devices with >1-year runtime |
| High CMRR and PSRR | 86 dB CMRR and 30 µV/V PSRR suppress noise from shared grounds or noisy power rails in compact PCB layouts |
| Stable with large capacitive loads | Drives up to 10,000 pF when sourcing - simplifies anti-aliasing filter design and eliminates external isolation resistors |
Applications
| Battery-Powered Medical Instrumentation | Portable Test Equipment |
|---|---|
Use Scenario: Amplifying low-level ECG or pulse oximeter sensor outputs in handheld diagnostic devices powered by Li-ion batteries. IC Role / Device Role / Timing Role: Dual-channel signal conditioner providing simultaneous front-end gain and filtering for analog sensor pairs. Use Value: Low 350 µA quiescent current per channel extends battery life; rail-to-ground output enables direct connection to 12-bit SAR ADCs without level shifters. | Use Scenario: Signal buffering and level translation in handheld multimeters or portable oscilloscope probes. IC Role / Device Role / Timing Role: Precision dual op-amp performing input scaling, offset correction, and drive for display driver or data acquisition circuitry. Use Value: ±750 µV max offset ensures <0.1% measurement error at unity gain; 1.5 MHz GBW supports accurate AC waveform capture up to 100 kHz. |
| PCMCIA Card Signal Conditioning | Industrial Sensor Interface Module |
Use Scenario: Analog signal preprocessing on legacy PCMCIA-based data acquisition cards with tight board space constraints. IC Role / Device Role / Timing Role: Dual op-amp implementing programmable gain and anti-aliasing filtering in a 8-pin SOIC footprint. Use Value: SOIC-8 package fits standard PCMCIA card layout; wide 2.7–36 V supply accommodates variable host bus voltages and onboard regulation schemes. | Use Scenario: Conditioning 4–20 mA loop sensor outputs or thermocouple signals in DIN-rail mounted I/O modules. IC Role / Device Role / Timing Role: Dual-channel amplifier providing isolated signal gain, filtering, and output buffering before ADC sampling. Use Value: 86 dB CMRR rejects common-mode noise from long sensor cables; 36 V max supply supports direct connection to 24 V industrial power rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift architecture; 0.02 µV/°C max drift vs. ±5 µV/°C for OPA2237UAG4; higher IQ (17 µA vs. 350 µA) | Better for ultra-low-drift DC measurements over temperature; less suitable for battery lifetime-critical designs | Choose OPA2333AIDR only if drift <0.1 µV/°C is required and power budget allows >10× higher IQ |
| LM2904DR | Higher offset (7 mV max), lower GBW (1.2 MHz), no rail-to-ground output (30 mV min swing) | Cost-optimized general-purpose use; insufficient for precision medical or test-grade accuracy | Use LM2904DR only in non-critical industrial controls where ±10 mV error is acceptable |
Compared with OPA2237UAG4, OPA2333AIDR offers superior DC precision but sacrifices battery runtime, while LM2904DR reduces cost at the expense of accuracy, output swing, and thermal stability-making OPA2237UAG4 the optimal balance for portable precision analog systems.
Availability
OPA2237UAG4 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable test equipment, and industrial sensor interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2237UAG4 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 delivering analog, embedded processing, and connectivity solutions with deep expertise in precision analog design and high-volume manufacturing.
The OPA2237UAG4 belongs to TI's MicroAmplifier Series-designed specifically for space-constrained, single-supply, battery-operated applications such as PCMCIA cards and portable medical instruments where size, power, and precision must coexist.
FAQ
What is the maximum capacitive load the OPA2237UAG4 can drive stably?
The OPA2237UAG4 remains stable driving up to 10,000 pF when sourcing current-common in DAC output buffers or anti-aliasing filters-and up to 4,000 pF when sinking. This capability eliminates external isolation resistors in many sensor interface designs, preserving signal integrity and simplifying layout. The OPA2237UAG4 datasheet confirms this behavior under specified load and output current conditions.
Does the OPA2237UAG4 support true single-supply operation with ground-referenced inputs?
Yes. The OPA2237UAG4 features an input common-mode range extending 0.2 V below V– (typically ground), allowing direct connection of 0 V–referenced sensors like thermistors or bridge transducers. Its output also swings within 10 mV of V–, enabling seamless interfacing with ground-referenced ADCs or microcontroller inputs without level-shifting circuitry. This behavior is verified across the full –40°C to +85°C operating range for OPA2237UAG4.
What is the guaranteed input offset voltage specification for OPA2237UAG4?
The OPA2237UAG4 has a maximum input offset voltage of ±750 µV at VS = 5 V and TA = 25°C, with production-tested limits ensuring worst-case performance across temperature. At 30 V supply, the max offset increases to ±950 µV. These values are guaranteed by TI's production test flow-not typical-only-and apply directly to the OPA2237UAG4 in its SOIC-8 package without derating.
Can OPA2237UAG4 operate from a 3.3 V supply?
Yes. The OPA2237UAG4 is fully specified from 2.7 V to 36 V single supply, including 3.3 V operation. At 3.3 V, it maintains 1.2 MHz GBW, ±950 µV max offset, and rail-to-ground output swing-enabling direct use with 3.3 V microcontrollers and low-voltage ADCs. Electrical characteristics tables in the OPA2237UAG4 datasheet explicitly include 2.7 V and 5 V test conditions confirming robust low-voltage functionality.
Is the OPA2237UAG4 pin-compatible with other dual op-amps in SOIC-8 packages?
No. While the OPA2237UAG4 uses the industry-standard SOIC-8 footprint, its pinout (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+) differs from common dual op-amps like LM2904 or TL072. Substituting without layout revision will cause functional failure. Always verify pin mapping using the OPA2237UAG4-specific pin function table-not generic SOIC-8 assumptions-before board design or replacement.
OPA2237UAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 170µA (x2 Channels)
- 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
OPA2237UAG4 FAQ
1.How can I place an order for OPA2237UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2237UAG4 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 OPA2237UAG4 reliable?
The price and inventory of OPA2237UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2237UAG4 is usually 5 days.
3.What payment methods are accepted for OPA2237UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2237UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2237UAG4?
OPA2237UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2237UAG4 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 OPA2237UAG4?
For technical support, including OPA2237UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2237UAG4 requirements.
6.How does Aetrix verify that OPA2237UAG4 is sourced from the original manufacturer or authorized distributors?
All OPA2237UAG4 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 OPA2237UAG4 meets industry standards.
7.What is the process for return or replacement of OPA2237UAG4?
All OPA2237UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2237UAG4, 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 OPA2237UAG4 part is unused and in its original packaging.
Return procedure for OPA2237UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2237UAG4 Tags
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