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Texas Instruments OPA2137UA/2K5
- Part No.:
- OPA2137UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2137UA/2K5.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,606
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Product details
Overview
OPA2137UA/2K5 from Texas Instruments (formerly Burr-Brown) is a dual FET-input operational amplifier in SO-8 package, delivering 1MHz gain-bandwidth, 3.5V/µs slew rate, ±1.5mV max input offset voltage, and ultra-low 5pA input bias current. It operates from ±2.25V to ±18V supplies and supports precision signal conditioning in battery-powered instrumentation and photodetector interfaces.
For engineers reviewing the OPA2137UA/2K5 datasheet, OPA2137UA/2K5 pinout, OPA2137UA/2K5 application, or OPA2137UA/2K5 equivalent, key selection criteria include input bias current stability over temperature, rail-to-rail input common-mode range extending to V+, and guaranteed performance across –40°C to +85°C for industrial-grade reliability.
Technical Context
The OPA2137UA/2K5 implements a JFET-input stage with fully independent dual amplifiers-no crosstalk between channels-and features input common-mode voltage range from (V–)+3V to V+, enabling high-side sensing without phase inversion. Its unity-gain stable architecture supports direct use in active filters and integrators without external compensation.
Specified at ±15V supply with 10kΩ load, it achieves 94dB open-loop gain, 76dB CMRR, and 86dB PSRR at DC, with noise performance of 45nV/√Hz voltage noise density and 1.2fA/√Hz current noise density-critical for low-level sensor signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | ±5pA typical - enables high-impedance sensor interfacing (e.g., photodiodes, strain gages) without significant error current. |
| Input Offset Voltage | ±1.5mV max (25°C), ±2.5mV max (–40°C to +85°C) - ensures <0.01% gain error in 100mV full-scale precision amplifiers. |
| Gain-Bandwidth Product | 1MHz - supports stable closed-loop operation up to 100kHz at G=10, suitable for anti-aliasing and active filter design. |
| Slew Rate | 3.5V/µs - delivers <10µs settling time to 0.1% for 10V step, meeting dynamic response requirements in data acquisition front-ends. |
| Supply Voltage Range | ±2.25V to ±18V dual or +4.5V to +36V single - accommodates wide-range industrial power rails and battery-operated systems down to two AA cells. |
| Quiescent Current | ±220µA per channel - enables dual-amplifier operation at <450µA total, critical for multi-year battery life in portable instruments. |
| Input Common-Mode Range | (V–)+3V to V+ - allows direct high-side current sensing and single-supply operation without level-shifting circuitry. |
Pinout & Package
OPA2137UA/2K5 is packaged in an 8-pin SOIC (SO-8) surface-mount package per JEDEC MS-012, with thermal resistance θJA = 150°C/W. Pin numbering follows standard SO-8 convention with Pin 1 in bottom-left corner (notch or dot indicator).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +In A | Non-inverting input of Amplifier A - referenced to V– for common-mode range compliance. |
| 2 | –In A | Inverting input of Amplifier A - accepts feedback network for configured gain or filtering. |
| 3 | Out A | Output of Amplifier A - drives loads up to 1000pF directly; short-circuit protected to ±25/+60mA. |
| 4 | V– | Negative supply rail - must be bypassed with ≥10nF ceramic capacitor near pin for stability. |
| 5 | V+ | Positive supply rail - shared by both amplifiers; bypassing required for PSRR optimization. |
| 6 | –In B | Inverting input of Amplifier B - electrically isolated from Amplifier A; no crosstalk. |
| 7 | +In B | Non-inverting input of Amplifier B - supports independent biasing for dual-channel signal paths. |
| 8 | Out B | Output of Amplifier B - identical AC/DC specs to Out A; usable for differential output or parallel drive. |
Key Features
| Feature | Design Value |
|---|---|
| FET input stage | 5pA input bias current enables >100MΩ source impedance interfacing without measurable offset drift. |
| Rail-to-rail input common-mode range | Extends to V+ - eliminates need for input voltage translation in high-side current monitoring applications. |
| Unity-gain stable | No external compensation required - simplifies layout and reduces bill-of-materials for gain-of-1 buffers and integrators. |
| Independent dual amplifiers | Zero crosstalk between channels - maintains signal integrity in dual-path systems like stereo audio or differential sensor pairs. |
| Low-noise architecture | 45nV/√Hz voltage noise density at 1kHz - preserves SNR in microvolt-level photodetector and strain gage signals. |
Applications
| Strain Gage Amplifier | Photodetector Amplifier |
|---|---|
|
Use Scenario: Wheatstone bridge output amplification in load cell or pressure transducer circuits. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end with high-Z input and low drift. Use Value: 5pA input bias current prevents bridge imbalance errors; ±1.5mV offset ensures <0.1% full-scale accuracy at 10mV/V sensitivity. |
Use Scenario: Transimpedance amplification of current from BPW34 photodiode in optical sensing. IC Role / Device Role / Timing Role: Low-noise, high-gain current-to-voltage converter. Use Value: 1.2fA/√Hz current noise minimizes shot-noise contribution; 1MHz GBW supports >100kHz modulation bandwidth. |
| Precision Integrator | Battery-Powered Instruments |
|
Use Scenario: Analog computing and waveform generation requiring long time-constant integration. IC Role / Device Role / Timing Role: Unity-gain stable integrator core with minimal input current-induced drift. Use Value: 5pA bias current limits integration error to <1µV/s at 1nF capacitor; 94dB AOL ensures linearity over 10-decade dynamic range. |
Use Scenario: Portable multimeter, handheld environmental sensor, or field calibration tool. IC Role / Device Role / Timing Role: Signal conditioning and reference buffering in ultra-low-power analog front-end. Use Value: 220µA/channel quiescent current enables dual-opamp operation on coin-cell batteries for >5 years at 10s sampling interval. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual FET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2134UA/2K5 | Lower 10nV/√Hz voltage noise, higher 4.5mA quiescent current per channel, same SO-8 package. | Better suited for audio preamps where noise dominates; less optimal for battery life-critical designs. | Select OPA2134UA/2K5 only when sub-20nV/√Hz noise is mandatory and power budget allows >4× higher IQ. |
| TL072CDR | Higher 200pA input bias current, 3MHz GBW, 13V/µs slew rate, but lower cost and wider temp range (–40°C to 125°C). | Acceptable for non-precision industrial controls where 0.1% offset tolerance suffices. | Choose TL072CDR for cost-sensitive, non-battery applications requiring extended temperature operation beyond +85°C. |
Compared with OPA2137UA/2K5, OPA2134UA/2K5 trades ultra-low power for lower noise, while TL072CDR sacrifices input bias current and offset accuracy for cost and temperature robustness-making OPA2137UA/2K5 the optimal balance for precision, low-power, and industrial-grade dual op-amp needs.
Availability
OPA2137UA/2K5 is available at Aetrix Electronics and suitable for strain gage amplifiers, photodetector interfaces, and precision integrators requiring stable component supply with guaranteed long-term manufacturability.
Supply support for OPA2137UA/2K5 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 acquired Burr-Brown in 2000 and maintains its legacy of high-precision analog ICs, with global manufacturing, testing, and quality systems certified to ISO 9001 and IATF 16949 standards.
The OPA2137UA/2K5 belongs to TI's MicroAmplifier™ series, designed specifically for miniature, low-cost, low-power precision signal conditioning in space-constrained and energy-sensitive applications.
FAQ
What is the maximum operating temperature range for OPA2137UA/2K5?
The OPA2137UA/2K5 is specified over –40°C to +85°C for electrical performance and operates reliably from –55°C to +125°C. This extended operating range supports deployment in harsh industrial environments such as motor control cabinets and outdoor instrumentation enclosures where ambient temperatures exceed standard commercial limits.
Does OPA2137UA/2K5 require external compensation for unity-gain stability?
No, OPA2137UA/2K5 is internally compensated for unity-gain stability. It can be used directly as a voltage follower or in G=1 configurations without added capacitors or resistors-reducing design complexity and PCB area while maintaining phase margin >45° across temperature and supply variations.
Can OPA2137UA/2K5 drive capacitive loads, and what is the limit?
Yes, OPA2137UA/2K5 is characterized to drive up to 1000pF capacitive loads without oscillation or excessive overshoot. For loads >100pF, TI recommends adding a small series resistor (e.g., 10Ω–50Ω) between the output and capacitance to maintain stability in high-frequency feedback paths.
How does the input common-mode voltage range of OPA2137UA/2K5 benefit high-side current sensing?
The OPA2137UA/2K5 input common-mode range extends to V+, allowing direct connection to the high-side shunt resistor terminal without level-shifting circuitry. This eliminates offset errors introduced by resistive dividers and preserves measurement accuracy in power supply monitoring and battery management systems.
Is OPA2137UA/2K5 pin-compatible with other dual op-amps in SO-8 packages?
OPA2137UA/2K5 uses standard SO-8 pinout (Pin 1 = +In A, Pin 4 = V–, Pin 5 = V+, Pin 8 = Out B), matching industry conventions for dual op-amps. However, functional compatibility requires verification of input bias current, offset voltage, and supply range-OPA2137UA/2K5 is not a drop-in replacement for bipolar-input devices like LM358 due to fundamental architecture differences.
OPA2137UA/2K5 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:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 3.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 220µA
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2137UA/2K5 FAQ
1.How can I place an order for OPA2137UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2137UA/2K5 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 OPA2137UA/2K5 reliable?
The price and inventory of OPA2137UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2137UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2137UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2137UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2137UA/2K5?
OPA2137UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2137UA/2K5 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 OPA2137UA/2K5?
For technical support, including OPA2137UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2137UA/2K5 requirements.
6.How does Aetrix verify that OPA2137UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2137UA/2K5 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 OPA2137UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2137UA/2K5?
All OPA2137UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2137UA/2K5, 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 OPA2137UA/2K5 part is unused and in its original packaging.
Return procedure for OPA2137UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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