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Texas Instruments OPA2337EA/250
- Part No.:
- OPA2337EA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
OPA2337EA/250.pdf
- Description:
- IC CMOS 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:616
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Product details
Overview
OPA2337EA/250 from Texas Instruments is a dual, rail-to-rail output CMOS operational amplifier in SOT23-8 package, featuring unity-gain stability, 3MHz gain-bandwidth product, 1.2V/µs slew rate, and 525µA per amplifier quiescent current. It operates from 2.5V to 5.5V single supply and delivers ±3mV input offset voltage, making it suitable for low-power, space-constrained signal conditioning in portable instrumentation.
For engineers reviewing the OPA2337EA/250 datasheet, OPA2337EA/250 pinout, OPA2337EA/250 application, or OPA2337EA/250 equivalent, key selection criteria include rail-to-rail output swing down to 125mV from rails (RL = 25kΩ), FET-input bias current ≤10pA, input common-mode range including ground, and dual-channel independence for low crosstalk in precision analog front-ends.
Technical Context
The OPA2337EA/250 implements a CMOS input stage with 10¹³Ω differential input impedance and 0.6fA/√Hz current noise density at 1kHz. Its open-loop gain is 120dB (typ) with 74dB CMRR over −0.2V to (V+)−1.2V common-mode range, enabling accurate amplification near ground in single-supply systems.
It uses internal compensation for unity-gain stability and maintains 0.01% settling in 2.5µs for 2V steps with 100pF load. Channel separation exceeds 120dB at DC, ensuring minimal interaction between amplifiers even under overload conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - supports stable closed-loop operation up to ~300kHz at G = 10 without phase margin loss |
| Slew Rate | 1.2V/µs - enables 2Vpp signals at ≤600kHz without slew-induced distortion |
| Input Bias Current | ≤10pA max - preserves accuracy in high-impedance sensor interfaces like photodiode preamps |
| Quiescent Current | 525µA per amplifier - allows dual-channel operation from coin-cell or 3.3V LDO supplies |
| Input Offset Voltage | ±3.5mV max (−40°C to +85°C) - ensures ≤3.5mV baseline error in DC-coupled gain stages |
| Output Swing | 125mV from rail (RL = 25kΩ) - delivers >95% of full-scale dynamic range into moderate loads |
| Supply Voltage Range | 2.5V to 5.5V - compatible with Li-ion, 3.3V, and 5V logic domains without level-shifting |
Pinout & Package
SOT23-8 surface-mount package (DCN designator), 2.9mm × 1.6mm footprint, 1.1mm height, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply input - must be bypassed with 0.01µF ceramic capacitor to ground |
| 2 | Out B | Output of second amplifier - rail-to-rail swing supports direct ADC driving |
| 3 | −In B | Inverting input of second amplifier - high-impedance node for feedback network connection |
| 4 | +In B | Non-inverting input of second amplifier - accepts signals down to ground in single-supply mode |
| 5 | Out A | Output of first amplifier - independent channel enables dual-path signal processing |
| 6 | −In A | Inverting input of first amplifier - matched to Pin 3 for balanced dual-channel design |
| 7 | +In A | Non-inverting input of first amplifier - shares same CMVR and bias current specs as Pin 4 |
| 8 | V− | Negative supply (ground in single-supply) - return path for both amplifiers' quiescent current |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers usable signal headroom within 125mV of V+ and V−, maximizing dynamic range in 3.3V systems |
| FET-input architecture | 10pA max input bias current enables accurate amplification of nanoamp-level photodiode or pH electrode currents |
| Unity-gain stable | Operates unconditionally stable at G = 1 without external compensation components |
| Dual-channel isolation | 0.3µV/V dc channel separation minimizes crosstalk in simultaneous sampling or differential pair configurations |
| Ground-sensing input | Input common-mode range includes V−, eliminating need for level-shifting in single-supply sensor interfaces |
Applications
| Battery-Powered Instruments | Photodiode Pre-Amps |
|---|---|
Use Scenario: Portable multimeter front-end amplifying mV-level thermocouple or resistance bridge outputs. IC Role / Device Role / Timing Role: Dual op amp providing gain and buffering for two independent measurement channels. Use Value: 525µA per amplifier quiescent current extends battery life; rail-to-rail output maximizes ADC utilization in 3V systems. | Use Scenario: Low-noise transimpedance amplification of reverse-biased photodiode current in pulse oximetry. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with ultra-low input bias current. Use Value: ≤10pA input bias current prevents signal corruption; 26nV/√Hz voltage noise preserves SNR in low-light detection. |
| Medical Instrumentation | Driving ADCs |
Use Scenario: ECG signal conditioning stage amplifying µV-level biopotentials with high CMRR. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end with matched input pairs. Use Value: 74dB CMRR rejects power-line interference; dual independence prevents cross-channel artifact coupling. | Use Scenario: Buffering and driving SAR ADC inputs in low-power data acquisition systems like ADS7822. IC Role / Device Role / Timing Role: Output driver maintaining signal integrity during ADC sampling transitions. Use Value: 125mV rail-to-rail swing ensures full-scale ADC codes; 2.5µs 0.01% settling meets 12-bit conversion timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2340UA/2K5 | Higher GBW (5.5MHz), higher IQ (750µA), SO-8 only | Better bandwidth for active filters but higher power draw limits battery use | Select when >3MHz closed-loop bandwidth is required and board space allows SO-8 |
| MCP6022-I/SN | Lower offset (2.5mV max), lower noise (14nV/√Hz), same SOT23-8 package | Superior DC precision and noise performance but not unity-gain stable (min G = 5) | Select for high-accuracy DC-coupled sensors where gain ≥5 is acceptable |
Compared with OPA2337EA/250, OPA2340UA/2K5 offers wider bandwidth at higher quiescent current, while MCP6022-I/SN provides lower offset and noise but requires minimum gain of 5-making OPA2337EA/250 optimal for unity-gain, low-power, space-constrained designs.
Availability
OPA2337EA/250 is available at Aetrix Electronics and suitable for battery-powered instruments, photodiode pre-amplifiers, and medical instrumentation requiring stable component supply across industrial temperature ranges.
Supply support for OPA2337EA/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 company specializing in analog and embedded processing technologies.
The OPA2337EA/250 belongs to TI's MicroAmplifier Series, designed for miniature, low-power, rail-to-rail signal conditioning in space- and energy-constrained applications.
FAQ
What is the operating temperature range for the OPA2337EA/250?
The OPA2337EA/250 is specified for operation from −40°C to +85°C ambient temperature. Its absolute maximum ratings extend to −55°C to +125°C for storage and junction temperature, but guaranteed electrical performance-including offset voltage, gain-bandwidth, and output swing-is only validated across the −40°C to +85°C range stated in the datasheet. This makes OPA2337EA/250 suitable for commercial and industrial environments but not extended automotive or military applications.
Does the OPA2337EA/250 require external compensation capacitors?
No, the OPA2337EA/250 is internally compensated for unity-gain stability and does not require external compensation capacitors for stable operation at G = 1. Unlike the OPA2338 series, which requires external RC networks for gains below 5, the OPA2337EA/250 can be used directly in buffer, inverting, or non-inverting configurations without added components-reducing bill-of-materials count and PCB area in compact designs.
What is the maximum capacitive load the OPA2337EA/250 can drive reliably?
The OPA2337EA/250 can reliably drive up to 100pF capacitive loads while maintaining 0.01% settling in 2.5µs for a 2V step, as verified in the datasheet's typical characteristics. Driving larger capacitive loads-such as ADC input capacitance plus PCB trace capacitance exceeding 100pF-may cause overshoot or instability. For loads >100pF, a small series resistor (e.g., 10–50Ω) between the OPA2337EA/250 output and the load is recommended to isolate capacitance and preserve phase margin.
How does the input common-mode voltage range of the OPA2337EA/250 support single-supply operation?
The OPA2337EA/250 features an input common-mode voltage range extending from (V−) − 0.2V to (V+) − 1.2V, which includes ground when V− = 0V. This allows direct connection of sensors referenced to ground-such as thermistors or electret microphones-without level-shifting circuitry. Combined with rail-to-rail output, this enables full-swing signal processing from a single 2.5V–5.5V supply, simplifying power architecture in portable devices using the OPA2337EA/250.
Is the OPA2337EA/250 pin-compatible with other dual op amps in SOT23-8 packages?
The OPA2337EA/250 follows the standard SOT23-8 pinout for dual op amps (V+, Out B, −In B, +In B, Out A, −In A, +In A, V−), matching industry conventions used by TI's own OPA2340 and many competitors. However, pin compatibility alone does not guarantee functional equivalence-electrical parameters such as gain-bandwidth, input bias current, and stability requirements differ. Always verify layout compatibility and perform bench validation before substituting OPA2337EA/250 in existing designs.
OPA2337EA/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.2V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 525µA (x2 Channels)
- Current - Output / Channel:
- 9 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
OPA2337EA/250 FAQ
1.How can I place an order for OPA2337EA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2337EA/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 OPA2337EA/250 reliable?
The price and inventory of OPA2337EA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2337EA/250 is usually 5 days.
3.What payment methods are accepted for OPA2337EA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2337EA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2337EA/250?
OPA2337EA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2337EA/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 OPA2337EA/250?
For technical support, including OPA2337EA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2337EA/250 requirements.
6.How does Aetrix verify that OPA2337EA/250 is sourced from the original manufacturer or authorized distributors?
All OPA2337EA/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 OPA2337EA/250 meets industry standards.
7.What is the process for return or replacement of OPA2337EA/250?
All OPA2337EA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2337EA/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 OPA2337EA/250 part is unused and in its original packaging.
Return procedure for OPA2337EA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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