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Texas Instruments OPA2237EA/250
- Part No.:
- OPA2237EA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2237EA/250.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,232
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Product details
Overview
OPA2237EA/250 from Texas Instruments is a dual-channel, rail-to-rail output, single-supply operational amplifier in an 8-pin VSSOP package. It delivers 1.5MHz gain-bandwidth, ±750µV max input offset voltage at 5V supply, 350µA max quiescent current per channel, and operates from 2.7V to 36V single supply. It is used in portable medical instruments and battery-powered test equipment requiring low power and wide supply range.
For engineers reviewing the OPA2237EA/250 datasheet, OPA2237EA/250 pinout, OPA2237EA/250 application, or OPA2237EA/250 equivalent, key selection criteria include input offset drift (±5µV/°C max), output swing within 10mV of ground, channel separation (1µV/V), capacitive load drive up to 10,000pF when sourcing, and thermal resistance (RθJA = 175.6°C/W in VSSOP).
Technical Context
The OPA2237EA/250 integrates two fully independent amplifiers with no crosstalk-each with identical electrical specs and separate power, input, and output paths. Its input common-mode range extends 0.2V below V– and 1.5V below V+, enabling true single-supply operation with ground-referenced inputs.
It is unity-gain stable and optimized for driving large capacitive loads: stable up to 4,000pF while sinking current and up to 10,000pF while sourcing-critical for sensor buffering and DAC output stages where load capacitance varies significantly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7V to 36V single supply (±1.35V to ±18V dual); supports direct integration into 3.3V, 5V, and 24V industrial rails without level-shifting. |
| Gain-Bandwidth Product | 1.5MHz at VS = 30V; enables stable closed-loop operation up to ~100kHz at G = 10 without phase margin loss. |
| Input Offset Voltage | ±750µV max at VS = 5V; ensures ≤0.75mV error in 1V full-scale precision signal conditioning paths. |
| Quiescent Current | 350µA max per amplifier; allows dual-channel operation at <700µA total, ideal for coin-cell or Li-ion powered devices. |
| Output Swing | Within 10mV of V– and 0.75V of V+ (RL = 10kΩ); supports near-ground-level sensing and high-side current monitoring with minimal headroom loss. |
| Channel Separation | 1µV/V (i.e., –120dB typical); prevents signal coupling between channels in dual-sensor or differential pair applications. |
| Capacitive Load Drive | Stable with up to 10,000pF when sourcing; eliminates need for isolation resistors in ADC driver or filter stage interfaces. |
Pinout & Package
OPA2237EA/250 is packaged in an 8-pin VSSOP (DGK) - 2.3mm × 2.0mm footprint, 0.5mm pitch - half the area of SOIC-8 and compatible with fine-pitch automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output; capable of sourcing up to 9.5mA and sinking 10mA; rail-to-rail swing supports direct connection to SAR ADC inputs. |
| 2 | –IN A | Inverting input, channel A; high-impedance (5TΩ common-mode), low bias current (–40nA max) minimizes error in high-Z sensor interfaces. |
| 3 | +IN A | Noninverting input, channel A; shares same CMVR as –IN A; enables precision noninverting gain stages with matched input impedance. |
| 4 | V– | Negative supply rail; must be connected to lowest system potential (e.g., ground in single-supply mode); referenced by all internal bias networks. |
| 5 | +IN B | Noninverting input, channel B; electrically isolated from channel A; enables simultaneous dual-signal processing without interaction. |
| 6 | –IN B | Inverting input, channel B; identical specs to –IN A; supports independent feedback networks for each amplifier. |
| 7 | OUT B | Amplifier B output; fully independent output stage; allows concurrent buffering of two analog signals (e.g., voltage + current sense). |
| 8 | V+ | Positive supply rail; accepts up to 36V; internal regulation ensures consistent performance across wide input range. |
Key Features
| Feature | Design Value |
|---|---|
| Micro-size VSSOP-8 package | 2.3mm × 2.0mm footprint enables high-density PCB layouts in space-constrained portable instruments and PCMCIA cards. |
| Rail-to-rail output swing | Reaches within 10mV of V– and 0.75V of V+ at 10kΩ load-maximizes dynamic range in low-voltage single-supply systems. |
| Wide input common-mode range | Extends 0.2V below V– and 1.5V below V+-supports ground-referenced inputs and high-side sensing without external level shifters. |
| Low quiescent current | 350µA per amplifier enables dual-channel operation under 700µA-critical for multi-day battery life in handheld diagnostics. |
| High capacitive load tolerance | Stable with 10,000pF when sourcing-eliminates series resistor in DAC output buffers and reduces component count in filtering stages. |
Applications
| Battery-Powered Medical Sensors | Portable Test Equipment |
|---|---|
Use Scenario: Amplifying low-level biopotential signals (ECG, EMG) from dry electrodes in handheld diagnostic devices. IC Role / Device Role / Timing Role: Dual-channel instrumentation front-end: one channel for differential sensor gain, second for reference buffer or active filtering. Use Value: Low 28nV/√Hz input noise and ±750µV offset ensure sub-mV signal fidelity; 350µA/channel current extends AA battery life beyond 12 months. |
Use Scenario: Signal conditioning in handheld multimeters and portable oscilloscope probes. IC Role / Device Role / Timing Role: Dual op-amp used for input attenuation scaling and DC offset correction prior to ADC sampling. Use Value: 1.5MHz GBW supports accurate 100kHz sine wave measurement; rail-to-rail output drives 12-bit SAR ADCs directly without external level-shifting. |
| PCMCIA Data Acquisition Cards | Industrial Sensor Signal Chains |
Use Scenario: Analog front-end for legacy PCMCIA-based data loggers interfacing with thermocouples and strain gauges. IC Role / Device Role / Timing Role: Dual amplifier implementing cold-junction compensation and programmable gain stage in compact card-edge form factor. Use Value: VSSOP-8 package fits tight 5mm board height constraints; wide 2.7–36V supply accommodates both 3.3V logic and 24V field bus power domains. |
Use Scenario: Signal conditioning for 4–20mA loop-powered transmitters in factory automation nodes. IC Role / Device Role / Timing Role: One amplifier for I/V conversion, second for loop driver output buffering and fault detection. Use Value: Independent channel circuitry prevents cross-talk between sensing and actuation paths; 10,000pF capacitive load stability avoids oscillation with long twisted-pair cable capacitance. |
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 drift), lower offset (±2µV), but higher IQ (17µA/channel) and narrower supply (1.8–5.5V). | Used where ultra-low drift dominates over power; unsuitable for >5.5V or battery-life-critical designs. | Select OPA2237EA/250 when operating above 5.5V or requiring sub-1mA total supply current. |
| MCP6022-I/SN | Higher GBW (10MHz), lower IQ (1mA/channel), but larger SOIC-8 package and reduced output swing (1.2V from rails at 10kΩ). | Favored in high-speed filtering or active anti-aliasing; less suitable for rail-sensitive low-voltage sensing. | Choose OPA2237EA/250 for space-constrained layouts needing rail-to-rail output and <700µA total current draw. |
Compared with OPA2333AIDR and MCP6022-I/SN, the OPA2237EA/250 uniquely balances ultra-low power (≤350µA/channel), wide supply (2.7–36V), rail-to-rail output, and VSSOP miniaturization-making it optimal for portable, multi-rail, and battery-operated dual-amplifier signal chains where size and efficiency are co-primary constraints.
Availability
OPA2237EA/250 is available at Aetrix Electronics and suitable for battery-powered instruments, portable medical devices, and PCMCIA data acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for OPA2237EA/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 delivering analog and embedded processing solutions, with decades of expertise in precision op amps and signal chain innovation.
The OPA2237EA/250 belongs to TI's MicroAmplifier™ series-designed specifically for space-constrained, single-supply, battery-operated applications such as portable diagnostics, handheld test gear, and modular sensor interfaces.
FAQ
What is the maximum capacitive load the OPA2237EA/250 can drive stably?
The OPA2237EA/250 remains stable with up to 10,000pF when sourcing current and up to 4,000pF when sinking current. This is confirmed in the Stability-Capacitive Load vs Output Current plot (Figure 6-2) and enables direct interface with long cables, ADC input capacitance, and RC filters without added isolation resistors-critical for maintaining signal integrity in portable test equipment using the OPA2237EA/250.
Does the OPA2237EA/250 support true single-supply operation with inputs referenced to ground?
Yes. The OPA2237EA/250 features an input common-mode voltage range extending 0.2V below V–, allowing ground-referenced inputs when V– = 0V. Its output also swings within 10mV of V–, making it fully functional in single-supply configurations like 3.3V or 5V systems without level-shifting circuitry-enabling simplified front-end design in battery-powered medical sensors using the OPA2237EA/250.
What is the guaranteed input offset voltage specification for OPA2237EA/250 at 5V supply?
At VS = 5V and TA = 25°C, the OPA2237EA/250 has a maximum input offset voltage of ±750µV (per Section 5.6). This value is production-tested and applies across the full –40°C to +85°C operating temperature range, ensuring predictable error budgets in precision analog signal paths built around the OPA2237EA/250.
Is the OPA2237EA/250 pin-compatible with other dual op-amps in VSSOP-8 packages?
No documented pin-to-pin compatibility exists between the OPA2237EA/250 and other VSSOP-8 dual op-amps. Its pinout (OUT A, –IN A, +IN A, V–, +IN B, –IN B, OUT B, V+) is specific to the OPA2x37 family. Substitution requires verification of signal routing, power sequencing, and layout adaptation-even if package dimensions match-so design validation is required before replacing another part with the OPA2237EA/250.
What thermal performance can be expected from the OPA2237EA/250 in its VSSOP-8 package?
In the VSSOP-8 (DGK) package, the OPA2237EA/250 has a junction-to-ambient thermal resistance (RθJA) of 175.6°C/W. At 700µA total quiescent current (350µA per channel), self-heating is limited to <0.12°C under typical PCB conditions-ensuring stable offset and bandwidth performance in sealed portable enclosures where the OPA2237EA/250 operates continuously.
OPA2237EA/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-VSSOP
OPA2237EA/250 FAQ
1.How can I place an order for OPA2237EA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2237EA/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 OPA2237EA/250 reliable?
The price and inventory of OPA2237EA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2237EA/250 is usually 5 days.
3.What payment methods are accepted for OPA2237EA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2237EA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2237EA/250?
OPA2237EA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2237EA/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 OPA2237EA/250?
For technical support, including OPA2237EA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2237EA/250 requirements.
6.How does Aetrix verify that OPA2237EA/250 is sourced from the original manufacturer or authorized distributors?
All OPA2237EA/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 OPA2237EA/250 meets industry standards.
7.What is the process for return or replacement of OPA2237EA/250?
All OPA2237EA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2237EA/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 OPA2237EA/250 part is unused and in its original packaging.
Return procedure for OPA2237EA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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