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Texas Instruments OPA2237UA/2K5G4
- Part No.:
- OPA2237UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2237UA/2K5G4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,713
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Product details
Overview
OPA2237UA/2K5G4 from Texas Instruments is a dual-channel, single-supply operational amplifier in the MicroAmplifier Series, designed for space-constrained, battery-powered systems. It delivers 1.5MHz gain-bandwidth, ±750µV max input offset voltage at 5V supply, 350µA max quiescent current per amplifier, and rail-to-rail output swing within 10mV of ground-enabling precision signal conditioning in portable medical instruments and PCMCIA cards.
For engineers reviewing the OPA2237UA/2K5G4 datasheet, OPA2237UA/2K5G4 pinout, OPA2237UA/2K5G4 application, or OPA2237UA/2K5G4 equivalent, key selection criteria include its dual-channel VSSOP-8 package, wide 2.7V–36V single-supply operation, low 28nV/√Hz input voltage noise, and guaranteed –40°C to +85°C performance without external compensation.
Technical Context
The OPA2237UA/2K5G4 integrates two fully independent amplifiers in a single VSSOP-8 package, eliminating crosstalk and enabling simultaneous signal paths in compact analog front-ends. Its input common-mode range extends 0.2V below V– and up to 1.5V below V+, supporting true single-supply sensing with ground-referenced inputs.
Internally compensated for unity-gain stability, it drives capacitive loads up to 10,000pF when sourcing current-critical for driving ADC input filters or long traces in portable test equipment. Output swing to within 10mV of ground and (V+) – 0.75V at 10kΩ load ensures full dynamic range utilization in 3.3V or 5V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Dual independent amplifiers-enables matched-pair signal processing without inter-channel interference. |
| Supply Range | 2.7V to 36V single supply (or ±1.35V to ±18V dual)-supports direct integration into 3.3V IoT nodes or 24V industrial sensors. |
| Gain-Bandwidth | 1.5MHz-sufficient for anti-aliasing filters, sensor amplification, and medium-speed data acquisition up to ~100kHz. |
| Input Offset Voltage | ±750µV max at VS = 5V-minimizes DC error in precision current-sense and bridge amplifier applications. |
| Quiescent Current | 350µA max per amplifier-extends battery life in portable devices operating continuously for months on coin cells. |
| Output Swing | Within 10mV of ground and (V+) – 0.75V at RL = 10kΩ-preserves >99% of available voltage headroom in low-voltage systems. |
| Input Voltage Noise | 28nV/√Hz at 1kHz-maintains signal integrity in low-level sensor interfaces such as thermocouples or strain gauges. |
Pinout & Package
VSSOP-8 (DGK) package: ultra-miniature 8-pin surface-mount housing measuring 3.0mm × 3.0mm × 1.0mm, optimized for high-density PCB layouts in portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output-drives downstream circuitry with rail-to-rail capability and 8mA sourcing current. |
| 2 | –IN A | Inverting input, channel A-accepts feedback networks for inverting configurations or differential sensing. |
| 3 | +IN A | Noninverting input, channel A-connects to reference or sensor signals with 5TΩ common-mode input impedance. |
| 4 | V– | Negative power supply-serves as the lowest potential reference for both amplifiers; supports ground-referenced operation. |
| 5 | +IN B | Noninverting input, channel B-enables independent second signal path with identical specs to channel A. |
| 6 | –IN B | Inverting input, channel B-allows dual-channel instrumentation amplifier topologies or parallel filtering. |
| 7 | OUT B | Amplifier B output-fully isolated from OUT A; enables simultaneous analog signal chains without crosstalk. |
| 8 | V+ | Positive power supply-accepts up to 36V; powers both amplifiers with shared thermal path and matched biasing. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings to within 10mV of V– and (V+) – 0.75V at 10kΩ load-maximizes usable dynamic range in 3.3V/5V systems. |
| Unity-gain stable | No external compensation required-reduces BOM count and layout area in standard gain configurations. |
| Low input bias current | –40nA max at 25°C-prevents signal degradation in high-impedance sensor interfaces like pH electrodes or photodiodes. |
| Wide input common-mode range | Extends 0.2V below V– to 1.5V below V+-enables direct connection to ground-referenced transducers without level-shifting. |
| Capacitive load drive | Stable with up to 10,000pF when sourcing-supports direct connection to ADC input capacitors or long PCB traces. |
Applications
| Battery-Powered Instrumentation | Portable Medical Devices |
|---|---|
|
Use Scenario: Precision analog front-end in handheld multimeters and portable oscilloscopes powered by Li-ion batteries. IC Role / Device Role / Timing Role: Dual-channel signal conditioning for AC/DC voltage measurement and current shunt amplification. Use Value: Low 350µA quiescent current per amplifier extends runtime; rail-to-rail output preserves resolution across full battery discharge curve (3.0V–4.2V). |
Use Scenario: ECG electrode signal amplification and lead-off detection in wearable cardiac monitors. IC Role / Device Role / Timing Role: Dual-opamp configuration for instrumentation amplifier core and reference buffer. Use Value: ±750µV max offset minimizes baseline drift; 28nV/√Hz noise ensures clean acquisition of microvolt-level bio-signals. |
| PCMCIA Card Signal Conditioning | Industrial Sensor Interface |
|
Use Scenario: Analog signal preprocessing in legacy PCMCIA data-acquisition cards with tight board area constraints. IC Role / Device Role / Timing Role: Dual-channel buffering and filtering for multi-sensor inputs before multiplexing to ADC. Use Value: VSSOP-8 footprint (3×3mm) fits within PCMCIA card height limit; 1.5MHz bandwidth supports kHz-range sensor outputs. |
Use Scenario: 4–20mA loop transmitter front-end in factory-floor temperature and pressure transmitters. IC Role / Device Role / Timing Role: Dual op-amp implementation of current-sense amplifier and voltage-to-current converter. Use Value: 2.7V–36V supply range accommodates 24V loop power; –40°C to +85°C rating ensures reliability in uncontrolled environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift architecture; 0.02µV/°C max offset drift vs. ±5µV/°C for OPA2237UA/2K5G4; higher 350kHz GBW but lower 1.8V min supply. | Better for DC-critical applications like precision weigh scales; less suitable for wide-supply industrial sensors requiring 2.7V–36V operation. | Select OPA2333AIDR only if µV-level drift over temperature is mandatory and supply stays ≥1.8V. |
| LMV358IDR | Lower cost; 1MHz GBW; 700µV max offset at 5V; 120µA quiescent current-but not specified for operation below 2.7V or above 5.5V. | Appropriate for consumer-grade 3.3V/5V systems where extended supply range and precision are secondary. | Choose LMV358IDR for cost-sensitive, low-power 3.3V designs where 1.5MHz bandwidth and 2.7V start-up are unnecessary. |
Compared with OPA2237UA/2K5G4, OPA2333AIDR offers superior DC stability at the expense of supply flexibility and bandwidth, while LMV358IDR trades precision and voltage range for lower cost and quiescent current-making OPA2237UA/2K5G4 the optimal balance for rugged, wide-supply, dual-channel analog signal chains.
Availability
OPA2237UA/2K5G4 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and PCMCIA card signal conditioning requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA2237UA/2K5G4 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 expertise in precision amplifiers and power management ICs.
The OPA2237UA/2K5G4 belongs to TI's MicroAmplifier Series-designed specifically for space-constrained, single-supply, battery-operated applications including portable test gear, medical wearables, and industrial sensor nodes.
FAQ
What is the maximum capacitive load the OPA2237UA/2K5G4 can drive stably?
The OPA2237UA/2K5G4 remains stable driving up to 10,000pF when sourcing current-ideal for direct connection to ADC input capacitors or long PCB traces in portable instrumentation. When sinking current, stability is maintained up to 4,000pF. This behavior is verified in the "Stability-Capacitive Load vs Output Current" plot (Figure 6-2) of the official SBOS057B datasheet. The OPA2237UA/2K5G4 achieves this without external compensation due to internal unity-gain stability design.
Does the OPA2237UA/2K5G4 support true single-supply operation with ground-referenced inputs?
Yes-the OPA2237UA/2K5G4 features an input common-mode voltage range extending 0.2V below V–, allowing direct connection to ground-referenced sensors (e.g., thermistors or resistive bridges) when V– = GND. Its output also swings to within 10mV of ground, preserving full signal fidelity in 3.3V or 5V single-rail systems. These capabilities are explicitly confirmed in Sections 3 and 4 of the SBOS057B datasheet for the OPA2237UA/2K5G4.
What is the operating temperature range specified for the OPA2237UA/2K5G4?
The OPA2237UA/2K5G4 is specified for continuous operation from –40°C to +85°C ambient temperature, matching industrial and portable medical device requirements. This range is validated across all electrical parameters in the SBOS057B datasheet, including offset voltage drift (±5µV/°C max), CMRR (76–90dB), and quiescent current (170–350µA at 5V). The VSSOP-8 package (DGK) used in OPA2237UA/2K5G4 is rated for this full range per TI's Mechanical, Packaging, and Orderable Information.
How does the OPA2237UA/2K5G4 compare to the single-channel OPA237 in performance?
The OPA2237UA/2K5G4 shares identical electrical specifications with the single-channel OPA237-including 1.5MHz GBW, ±750µV max offset at 5V, 350µA max IQ, and rail-to-rail output-enabling drop-in functional replacement in dual-channel designs. Both use the same silicon die architecture; the dual version simply integrates two matched amplifiers in one VSSOP-8 package. This ensures consistent channel-to-channel tracking and eliminates variation between separate OPA237 units.
Is the OPA2237UA/2K5G4 RoHS compliant and lead-free?
Yes-the OPA2237UA/2K5G4 is RoHS compliant and lead-free, as confirmed in TI's PACKAGE OPTION ADDENDUM (15-Jul-2026) for orderable part OPA2237EA/2K5. It carries no lead finish and meets JEDEC Level-2-260°C-1 YEAR moisture sensitivity requirements. The device marking "B37A" on the VSSOP-8 package corresponds to this RoHS-compliant production variant, ensuring compatibility with modern lead-free reflow processes.
OPA2237UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
OPA2237UA/2K5G4 FAQ
1.How can I place an order for OPA2237UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2237UA/2K5G4 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 OPA2237UA/2K5G4 reliable?
The price and inventory of OPA2237UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2237UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA2237UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2237UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2237UA/2K5G4?
OPA2237UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2237UA/2K5G4 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 OPA2237UA/2K5G4?
For technical support, including OPA2237UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2237UA/2K5G4 requirements.
6.How does Aetrix verify that OPA2237UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA2237UA/2K5G4 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 OPA2237UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA2237UA/2K5G4?
All OPA2237UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2237UA/2K5G4, 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 OPA2237UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA2237UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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