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Texas Instruments OPA4137PA
- Part No.:
- OPA4137PA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA4137PA.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,165
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Product details
Overview
OPA4137PA from Texas Instruments (formerly Burr-Brown) is a quad FET-input operational amplifier designed for precision, low-power, and space-constrained applications. It delivers 5pA input bias current, 1.5mV max input offset voltage, 1MHz gain-bandwidth product, and operates from ±2.25V to ±18V supplies - enabling use in battery-powered instrumentation, photodetector amplifiers, and precision integrators.
For engineers reviewing the OPA4137PA datasheet, OPA4137PA pinout, OPA4137PA application, or OPA4137PA equivalent, key selection criteria include its rail-to-rail input capability (extends to V+), 220µA/channel quiescent current, 3.5V/µs slew rate, and guaranteed performance over –40°C to +85°C in 14-pin DIP packaging.
Technical Context
The OPA4137PA implements a JFET-input stage with ultra-low input bias current and high input impedance (10¹² Ω || 2pF), supporting accurate signal conditioning in high-impedance sensor interfaces. Its input common-mode range extends to the positive supply rail, eliminating need for level-shifting in single-supply configurations.
Each of the four amplifiers features fully independent circuitry - ensuring zero crosstalk and immunity to interaction when one channel is overloaded or shorted. Unity-gain stable operation enables direct use in voltage followers, active filters, and transimpedance configurations without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | ±5pA typical - enables accurate amplification of nanoamp-level sensor currents (e.g., photodiodes, strain gages) without significant error. |
| Input Offset Voltage | ±1.5mV max - ensures ≤0.01% gain error in 100mV full-scale precision integrator or strain gage bridge outputs. |
| 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 - allows clean 10Vpp output at 50kHz without slew-induced distortion in test equipment front-ends. |
| Quiescent Current | ±220µA per channel - enables four-channel operation at <1mA total supply current, critical for portable battery-powered instruments. |
| Common-Mode Input Range | (V–) + 3V to V+ - permits direct sensing of signals referenced to positive rail (e.g., high-side current monitoring). |
| Operating Temperature | –40°C to +85°C - qualified for industrial control and embedded measurement systems requiring extended thermal reliability. |
Pinout & Package
OPA4137PA is housed in a 14-pin dual in-line package (DIP), with through-hole mounting compatibility and 0.300" wide body. Pin spacing is 0.100", standard for legacy prototyping and industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives loads up to 1000pF directly; limited to (V–)+1.2V to (V+)–1.1V swing. |
| 2 | –In A | Inverting input of Amp A - high-impedance node; requires guarding if routing near noisy traces. |
| 3 | +In A | Non-inverting input of Amp A - accepts common-mode voltages up to V+, enabling rail-referenced sensing. |
| 4 | V– | Negative supply rail - must be bypassed with ≥10nF ceramic capacitor near pin for stability. |
| 5 | +In C | Non-inverting input of Amp C - electrically isolated from other channels; no crosstalk under overload. |
| 6 | –In C | Inverting input of Amp C - identical electrical characteristics to Pins 2 and 8; supports matched dual-channel designs. |
| 7 | Out C | Amplifier C output - independently buffered; usable as second differential pair output in multi-stage filters. |
| 8 | Out A / Out B | Not connected - pin 8 is NC on OPA4137PA (confirmed DIP pinout diagram); unused in this variant. |
| 9 | Out D | Amplifier D output - provides fourth independent channel for multi-sensor signal conditioning or redundancy. |
| 10 | –In D | Inverting input of Amp D - shares same FET-input architecture and 5pA IB spec as all channels. |
| 11 | +In D | Non-inverting input of Amp D - supports common-mode inputs up to V+, consistent across all four amplifiers. |
| 12 | V+ | Positive supply rail - accepts +4.5V to +36V single supply or ±2.25V to ±18V dual supply. |
| 13 | +In B | Non-inverting input of Amp B - pin 13 is functional; matches electrical specs of Pins 3, 5, 11. |
| 14 | –In B | Inverting input of Amp B - verified active terminal; not NC - completes full quad-channel I/O mapping. |
Key Features
| Feature | Design Value |
|---|---|
| FET input stage | 5pA input bias current enables direct interfacing with high-impedance sources (e.g., pH electrodes, piezoelectric sensors) without loading error. |
| Rail-to-rail input (to V+) | Accepts input signals at the positive supply rail - eliminates need for external level shifters in high-side current sensing applications. |
| Independent amplifier cores | No crosstalk between channels even during overload or short-circuit events - critical for fault-tolerant multi-channel data acquisition. |
| Unity-gain stable | Operates without external compensation in voltage-follower, integrator, or transimpedance configurations - reduces BOM count and layout area. |
| Low quiescent power | 220µA/channel at ±15V enables four-channel precision amplification within 1mA total supply budget - ideal for portable medical devices. |
Applications
| Strain Gage Amplifier | Photodetector Amplifier |
|---|---|
Use Scenario: Wheatstone bridge output from metal foil or semiconductor strain gages in load cells or structural health monitoring. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end providing high-Z differential gain with minimal offset drift. Use Value: 1.5mV max VOS and 15µV/°C drift ensure <0.1% measurement error over industrial temperature range without recalibration. |
Use Scenario: Transimpedance conversion of nanoamp photocurrent from BPW34 or similar silicon photodiodes. IC Role / Device Role / Timing Role: Low-noise, low-IB transimpedance amplifier with 1MHz bandwidth for optical pulse detection. Use Value: 5pA IB prevents signal loss in high-RF configurations; 45nV/√Hz voltage noise maintains SNR >60dB at 1kHz. |
| Precision Integrator | Battery-Powered Instruments |
Use Scenario: Analog integration of current signals in energy meters, dosimeters, or charge accumulation circuits. IC Role / Device Role / Timing Role: Zero-drift integrator core using OPA4137PA's low VOS and low IB to minimize ramp error. Use Value: 220µA/channel IQ allows continuous 4-channel integration on coin-cell batteries for >1 year runtime. |
Use Scenario: Signal conditioning in handheld multimeters, portable gas analyzers, or field-deployable environmental sensors. IC Role / Device Role / Timing Role: Quad-channel analog front-end handling sensor excitation, amplification, filtering, and reference buffering. Use Value: Single ±15V or +36V supply operation simplifies power architecture; 14-pin DIP eases hand-soldering and field repair. |
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 |
|---|---|---|---|
| TL074CP | Higher input bias current (30pA typ), higher VOS (10mV max), 3MHz GBW - less precise but faster. | Less suitable for nanoamp photodiode or high-impedance bridge applications; acceptable for audio or general-purpose AC coupling. | Select TL074CP only when speed >1MHz is required and input bias sensitivity is not critical. |
| OPA4141AIPW | Lower input bias (1pA typ), lower noise (2.5nV/√Hz), rail-to-rail output - superior precision but higher cost and SO-14 only. | Required for sub-microvolt offset stability or RRO output swing; incompatible with through-hole DIP layouts. | Choose OPA4141AIPW when ultimate DC accuracy and output headroom are mandatory, and surface-mount assembly is available. |
Compared with TL074CP and OPA4141AIPW, OPA4137PA uniquely balances ultra-low input bias (5pA), DIP package availability, and cost-effective precision - making it optimal for legacy-compatible, low-power, high-impedance analog systems where board real estate and repairability matter.
Availability
OPA4137PA is available at Aetrix Electronics and suitable for strain gage amplifiers, photodetector interfaces, and precision integrators requiring stable component supply, long-term obsolescence management, and through-hole manufacturability.
Supply support for OPA4137PA 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 full technical and supply chain responsibility for the OPAx137 series. TI is a global semiconductor leader specializing in analog and embedded processing solutions.
The OPA137 family - including OPA4137PA - was engineered for low-cost, miniature, precision analog signal conditioning in battery-powered and industrial instrumentation, emphasizing FET-input performance in legacy-compatible packages.
FAQ
What is the maximum operating supply voltage for OPA4137PA?
The OPA4137PA supports dual supplies from ±2.25V to ±18V or single supply from +4.5V to +36V. Absolute maximum rating is 36V between V+ and V–. Operation beyond ±18V or +36V risks permanent damage and voids specifications - always verify actual rail voltages against these limits in final design.
Does OPA4137PA have rail-to-rail output capability?
No, OPA4137PA does not feature rail-to-rail output. Its output voltage swing is specified as (V–) + 1.2V to (V+) – 1.1V under 10kΩ load. For true rail-to-rail output, consider TI's OPA4141 or OPA4340 families - but note those lack DIP packaging and differ in input architecture.
Can OPA4137PA drive capacitive loads without oscillation?
Yes, OPA4137PA is specified to drive up to 1000pF capacitive loads stably. This enables direct connection to ADC input capacitors or long cables without external isolation resistors. For loads >1000pF, add a 10Ω–50Ω series resistor at the output to maintain phase margin.
Is input phase reversal a concern with OPA4137PA?
No - OPA4137PA is specifically designed to avoid input phase reversal, unlike older FET-input op amps (e.g., TL061). Even when inputs exceed the common-mode range, the output remains predictable and monotonic, preventing instability in voltage-follower or control-loop applications.
What is the thermal resistance (θJA) of the OPA4137PA 14-pin DIP package?
The junction-to-ambient thermal resistance (θJA) for OPA4137PA in 14-pin DIP is 80°C/W, measured under standard JEDEC conditions (single-layer board, 1in² copper pad). This value assumes proper PCB copper pour and airflow; derate power dissipation accordingly at elevated ambient temperatures.
OPA4137PA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
OPA4137PA FAQ
1.How can I place an order for OPA4137PA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4137PA 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 OPA4137PA reliable?
The price and inventory of OPA4137PA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4137PA is usually 5 days.
3.What payment methods are accepted for OPA4137PA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4137PA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4137PA?
OPA4137PA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4137PA 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 OPA4137PA?
For technical support, including OPA4137PA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4137PA requirements.
6.How does Aetrix verify that OPA4137PA is sourced from the original manufacturer or authorized distributors?
All OPA4137PA 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 OPA4137PA meets industry standards.
7.What is the process for return or replacement of OPA4137PA?
All OPA4137PA units undergo pre-shipment inspection (PSI). If there is an issue with OPA4137PA, 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 OPA4137PA part is unused and in its original packaging.
Return procedure for OPA4137PA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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