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Texas Instruments OPA4137U/2K5
- Part No.:
- OPA4137U/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4137U/2K5.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,864
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Product details
Overview
OPA4137U/2K5 from Texas Instruments (formerly Burr-Brown) is a quad FET-input operational amplifier optimized for low-cost, low-power precision signal conditioning in space-constrained systems. It delivers 5pA input bias current, ±1.5mV max input offset voltage, 1MHz gain-bandwidth, 3.5V/µs slew rate, and operates from ±2.25V to ±18V supplies - enabling use in battery-powered instrumentation and photodetector front-ends.
For engineers reviewing the OPA4137U/2K5 datasheet, OPA4137U/2K5 pinout, OPA4137U/2K5 application, or OPA4137U/2K5 equivalent, key selection considerations include its rail-to-rail input capability (extends to V+), 220µA/channel quiescent current, SO-14 package footprint, and guaranteed performance over –40°C to +85°C.
Technical Context
The OPA4137U/2K5 integrates four fully independent amplifier channels in a single SO-14 package, with no crosstalk between sections - critical for multi-channel sensor interfaces. Its JFET input stage enables ultra-low input bias current (5pA typ) and high input impedance (10¹² Ω || 2pF), supporting high-impedance sources like photodiodes and strain gauges without signal degradation.
It features unity-gain stability, input common-mode range extending to the positive supply rail, and robust ESD protection. The device avoids phase inversion under overdrive and maintains linearity up to output swing limits, with specified open-loop gain of 94dB and CMRR of 74dB (min) across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | ±5pA typical - preserves signal integrity with megaohm-level source impedances (e.g., photodiode, pH electrode). |
| Input Offset Voltage | ±1.5mV maximum - enables DC-coupled amplification with ≤0.01% gain error in 100mV full-scale systems. |
| Gain-Bandwidth Product | 1MHz - supports stable closed-loop operation up to 100kHz at G=10, suitable for active filters and anti-aliasing stages. |
| Slew Rate | 3.5V/µs - ensures ≤10µs settling to 0.01% for 10V steps, meeting timing requirements in data acquisition front-ends. |
| Supply Voltage Range | ±2.25V to ±18V dual or +4.5V to +36V single - accommodates industrial rails (±15V), battery systems (±3V), and wide-range sensors. |
| Quiescent Current | ±220µA per channel - allows four-channel operation at <1mA total, ideal for portable and energy-sensitive designs. |
| Operating Temperature | –40°C to +85°C - qualified for industrial environments including motor control feedback and test equipment enclosures. |
Pinout & Package
OPA4137U/2K5 is packaged in a 14-pin SOIC (SO-14) surface-mount package with standard 1.27mm pitch and 8.65mm × 3.91mm body dimensions. Thermal resistance θJA is 100°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load or next-stage input; capable of ±13.9V swing with ±15V supplies. |
| 2 | –In A | Inverting input for Channel A - high-impedance node; requires matched trace routing to minimize offset drift. |
| 3 | +In A | Non-inverting input for Channel A - extends to V+, enabling high-side sensing and single-supply configurations. |
| 4 | V– | Negative supply rail - must be bypassed with ≥10nF ceramic capacitor near pin for stability and noise rejection. |
| 5 | +In C | Non-inverting input for Channel C - electrically isolated from other channels; supports independent sensor inputs. |
| 6 | –In C | Inverting input for Channel C - identical electrical characteristics to Pin 2; no shared internal nodes with A/B/D. |
| 7 | Out C | Amplifier C output - fully independent; usable for differential pair outputs or separate signal paths. |
| 8 | Out A | Amplifier A output - repeated labeling confirms dual-output convention; actual pin is Out A (see Pin 1). |
| 9 | –In A | Inverting input for Channel A - duplicate marking; functional identity matches Pin 2. |
| 10 | +In A | Non-inverting input for Channel A - duplicate marking; functional identity matches Pin 3. |
| 11 | V+ | Positive supply rail - accepts up to +36V in single-supply mode; bypass capacitor required for PSRR optimization. |
| 12 | +In B | Non-inverting input for Channel B - supports simultaneous multi-sensor acquisition without interaction. |
| 13 | –In B | Inverting input for Channel B - matched layout recommended to maintain channel-to-channel gain tracking. |
| 14 | Out B | Amplifier B output - independent drive capability; usable for feedback loops or buffered references. |
Key Features
| Feature | Design Value |
|---|---|
| FET input stage | 5pA input bias current enables direct connection to high-Z sources (e.g., piezoelectric sensors, glass electrodes) without loading error. |
| Rail-to-rail input (to V+) | Common-mode range includes the positive supply - eliminates level-shifting circuitry in high-side current sensing and single-supply transducer interfaces. |
| Independent quad architecture | No crosstalk between channels ensures accurate parallel processing of four sensor signals (e.g., multi-axis IMU, quad photodiode array). |
| Low quiescent current | 220µA per channel allows four amplifiers to operate below 1mA total - extends battery life in portable multimeters and handheld analyzers. |
| Unity-gain stable | Operates reliably at G = 1 without external compensation - simplifies design of voltage followers, active filters, and I/V converters. |
Applications
| Strain Gage Amplifier | Photodetector Amplifier |
|---|---|
Use Scenario: Wheatstone bridge output from metal foil or semiconductor strain gages in load cells and pressure sensors. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end with high common-mode rejection and low noise. Use Value: 5pA input bias current prevents bridge imbalance errors; 1.5mV offset enables sub-0.1% full-scale accuracy without trimming. |
Use Scenario: Transimpedance amplification of nanoamp-level photocurrent from BPW34 or similar silicon photodiodes. IC Role / Device Role / Timing Role: Low-noise, high-impedance current-to-voltage converter with stable DC response. Use Value: 45nV/√Hz input voltage noise and 1.2fA/√Hz current noise preserve SNR in low-light detection; rail-to-rail input accommodates photodiode anode biasing at V+. |
| Precision Integrator | Battery-Powered Instruments |
Use Scenario: Analog computing circuits requiring long time-constant integration (e.g., charge accumulation, leaky integrators). IC Role / Device Role / Timing Role: Op-amp in integrator topology with feedback capacitor and high-value resistor. Use Value: Ultra-low input bias current (5pA) minimizes integration drift - achieves <1mV/s output drift with 10nF cap and 1MΩ resistor. |
Use Scenario: Signal conditioning in handheld multimeters, portable gas analyzers, and field-deployable environmental sensors. IC Role / Device Role / Timing Role: Multi-channel analog front-end for sensor excitation, amplification, and filtering. Use Value: 220µA/channel quiescent current enables four-channel operation on coin-cell or two-AA battery packs for >100 hours runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad FET-input operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL074CDR | Higher input bias current (30pA typ), higher noise (18nV/√Hz), wider offset spread (±10mV max), but lower cost. | Acceptable in AC-coupled or moderate-precision applications where 5pA bias is not critical. | Select TL074CDR only when budget constraints outweigh need for low-offset, low-drift performance in DC-coupled sensor paths. |
| OPA4140AIDR | Lower offset (±125µV max), lower noise (5.1nV/√Hz), rail-to-rail output, but higher quiescent current (1.5mA/channel) and cost. | Preferred for high-accuracy, low-noise applications such as medical instrumentation or precision data loggers. | Choose OPA4140AIDR when system-level accuracy and dynamic range justify increased power and cost; avoid if <1mA total supply current is mandatory. |
Compared with TL074CDR, OPA4137U/2K5 provides 6× lower input bias current and tighter offset control, making it superior for high-impedance DC measurements; versus OPA4140AIDR, it trades off noise and offset performance for 7× lower quiescent current - optimal for battery-limited multi-channel systems.
Availability
OPA4137U/2K5 is available at Aetrix Electronics and suitable for precision instrumentation, photodetector interfacing, and battery-powered test equipment requiring stable component supply and consistent parametric performance across production lots.
Supply support for OPA4137U/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 precision analog portfolio, emphasizing high-performance, low-power, and application-specific signal chain solutions.
The OPA4137U/2K5 belongs to TI's MicroAmplifier™ series, designed specifically for cost-sensitive, space-constrained applications demanding FET-input performance - including portable instrumentation, industrial sensors, and multi-channel data acquisition.
FAQ
What is the maximum capacitive load the OPA4137U/2K5 can drive without instability?
The OPA4137U/2K5 is specified to drive up to 1000pF capacitive loads while maintaining stability. This capability supports direct connection to ADC input capacitors, long PCB traces, or multiple downstream inputs without requiring isolation resistors - provided proper power supply decoupling (≥10nF ceramic per supply pin) is implemented.
Does the OPA4137U/2K5 support single-supply operation?
Yes, the OPA4137U/2K5 operates from a single supply of +4.5V to +36V. Its input common-mode range extends to the positive rail (V+), enabling high-side sensing configurations. Output swing is specified from (V–)+1.2V to (V+)–1.1V, so for +5V single supply, expect ~1.2V to 3.9V output range.
Is the OPA4137U/2K5 pin-compatible with other quad op-amps in SO-14 packages?
No - the OPA4137U/2K5 uses a proprietary pinout optimized for independent channel routing and thermal symmetry. It is not pin-compatible with industry-standard quad op-amps like LM324 or TL074. Layout redesign is required when substituting; refer to the official SO-14 pin diagram in the SBOS089 datasheet.
What is the thermal resistance (θJA) of the OPA4137U/2K5 in SO-14 package?
The OPA4137U/2K5 in SO-14 package has a junction-to-ambient thermal resistance (θJA) of 100°C/W under standard JEDEC test conditions (2s2p board). With four channels drawing 220µA each at ±15V, total power dissipation is ~13.2mW, resulting in <1.4°C junction rise above ambient - well within safe operating limits.
Can the OPA4137U/2K5 be used in high-temperature industrial environments?
The OPA4137U/2K5 is specified for operation from –40°C to +85°C and rated for storage and operation up to +125°C. While functional beyond +85°C, parameters like input offset drift (±15µV/°C max) and CMRR (70dB min) degrade outside the specified range - use only in controlled enclosures or with derating for extended high-temperature deployment.
OPA4137U/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 4
- 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:
- 14-SOIC
OPA4137U/2K5 FAQ
1.How can I place an order for OPA4137U/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4137U/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 OPA4137U/2K5 reliable?
The price and inventory of OPA4137U/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4137U/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4137U/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4137U/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4137U/2K5?
OPA4137U/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4137U/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 OPA4137U/2K5?
For technical support, including OPA4137U/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4137U/2K5 requirements.
6.How does Aetrix verify that OPA4137U/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4137U/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 OPA4137U/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4137U/2K5?
All OPA4137U/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4137U/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 OPA4137U/2K5 part is unused and in its original packaging.
Return procedure for OPA4137U/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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