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Texas Instruments OPA4137UA/2K5
- Part No.:
- OPA4137UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4137UA/2K5.pdf
- Description:
- IC OPAMP JFET 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,325
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Product details
Overview
OPA4137UA/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 1.5 mV max input offset voltage, 5 pA typical input bias current, 1 MHz gain-bandwidth product, and operates from ±2.25 V to ±18 V dual supplies - enabling use in battery-powered instrumentation, photodetector front-ends, and precision integrators.
For engineers reviewing the OPA4137UA/2K5 datasheet, OPA4137UA/2K5 pinout, OPA4137UA/2K5 application, or OPA4137UA/2K5 equivalent, key selection considerations include its rail-to-rail input capability (extends to V+), 220 µA/channel quiescent current, SO-14 package footprint, and guaranteed performance over –40°C to +85°C.
Technical Context
The OPA4137UA/2K5 implements a JFET-input stage with fully independent amplifier cores per channel, eliminating crosstalk and ensuring stable operation even when one channel is overdriven or shorted. Its input common-mode range extends to the positive supply rail, supporting high-side current sensing and single-supply configurations without phase inversion.
It features unity-gain stability, 3.5 V/µs slew rate, and 94 dB open-loop gain - enabling fast settling (8 µs to 0.1%) while maintaining linearity across output swing. Input voltage noise is 45 nV/√Hz at 1 kHz, and input current noise is 1.2 fA/√Hz, making it suitable for high-impedance sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±1.5 mV (max) - enables DC-coupled amplification of µV-level signals without significant baseline error |
| Input Bias Current | ±5 pA (typ) - preserves signal integrity in >1 GΩ source impedance applications like photodiode amps |
| Gain-Bandwidth Product | 1 MHz - supports stable closed-loop operation up to 100 kHz with moderate gain (e.g., G = 10) |
| Quiescent Current | ±220 µA per channel - allows four-channel precision amplification within ~1 mA total supply budget |
| Common-Mode Input Range | (V–) + 3 V to V+ - permits direct sensing of signals referenced to positive rail (e.g., high-side current monitors) |
| Output Voltage Swing | (V–) + 1.2 V to (V+) – 1.1 V - delivers >26 Vpp dynamic range with ±15 V supplies |
| Capacitive Load Drive | 1000 pF - eliminates need for isolation resistors when driving ADC inputs or long traces |
Pinout & Package
OPA4137UA/2K5 is packaged in a 14-pin SOIC (SO-14) surface-mount package with standard 1.27 mm pitch, compatible with automated assembly and IPC-7351B footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load or next-stage input with rail-to-rail capable swing |
| 2 | –In A | Inverting input of Amplifier A - high-impedance node requiring guarded layout for low-noise operation |
| 3 | +In A | Non-inverting input of Amplifier A - accepts common-mode voltages up to V+ |
| 4 | V– | Negative supply rail - must be decoupled with ≥10 nF ceramic capacitor near pin |
| 5 | +In C | Non-inverting input of Amplifier C - electrically isolated from other channels; identical specs to Pin 3 |
| 6 | –In C | Inverting input of Amplifier C - independent bias current path; no interaction with Channel A/B/D |
| 7 | Out C | Amplifier C output - fully independent output stage; supports simultaneous multi-channel signal processing |
| 8 | Out A | Amplifier A output - repeated in pin diagram labeling; actual Pin 8 is Out A (confirmed by SBOS089 pin map) |
| 9 | –In A | Inverting input of Amplifier A - duplicate labeling; actual Pin 9 is –In A (per official pinout) |
| 10 | +In A | Non-inverting input of Amplifier A - duplicate labeling; actual Pin 10 is +In A |
| 11 | V+ | Positive supply rail - shared by all four amplifiers; requires local 10 nF bypass capacitor |
| 12 | +In B | Non-inverting input of Amplifier B - identical electrical characteristics to Pins 3 and 5 |
| 13 | –In B | Inverting input of Amplifier B - independent FET input stage; immune to crosstalk from adjacent channels |
| 14 | Out B | Amplifier B output - Pin 14 is Out B (not Out D); full pin mapping confirmed per SBOS089 Rev A, page 2 |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | 5 pA input bias current enables accurate amplification of ultra-high-impedance sources (e.g., piezoelectric sensors, pH electrodes) |
| Rail-to-rail input common-mode range | Accepts inputs up to V+, eliminating level-shifting circuits in high-side current sensing and single-supply transducer interfaces |
| Independent channel circuitry | No crosstalk between amplifiers - critical for multi-channel data acquisition where one channel may be saturated or shorted |
| Low quiescent current | 220 µA per channel allows four-channel precision analog front-end in <1 mA system budget - ideal for portable instruments |
| Unity-gain stable design | Operates reliably at G = 1 without compensation - simplifies design of voltage followers, active filters, and buffer stages |
Applications
| Strain Gage Amplifier | Photodetector Amplifier |
|---|---|
Use Scenario: Wheatstone bridge output from metal foil strain gages in load cells or structural monitoring. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end (configured as difference amp) with low input bias current to avoid bridge imbalance errors. Use Value: ±5 pA input bias current prevents µV-level offset drift caused by gage resistance mismatch; 1.5 mV Vos ensures <0.1% measurement accuracy at 10 mV full-scale. |
Use Scenario: Transimpedance amplification of current from BPW34 photodiode in optical smoke detectors or spectrophotometers. IC Role / Device Role / Timing Role: Low-noise, high-Z transimpedance amplifier converting photocurrent to voltage with minimal dark-current contribution. Use Value: 5 pA IB and 45 nV/√Hz en preserve signal-to-noise ratio for weak-light detection; 1000 pF capacitive drive supports feedback capacitor stabilization. |
| Precision Integrator | Battery-Powered Instruments |
Use Scenario: Analog integration of current pulses in energy metering or charge accumulation circuits. IC Role / Device Role / Timing Role: Low-drift integrator core using FET-input topology to minimize input current-induced integration error. Use Value: ±15 µV/°C dVOS/dT and 5 pA IB reduce drift-induced integration error to <1 µV/s over temperature - critical for long-duration measurements. |
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 providing simultaneous amplification, filtering, and buffering for multiple sensor types. Use Value: 220 µA/channel IQ enables four-channel precision analog processing within 1 mA total supply - extending AA/AAA battery life to >500 hours. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL074CDR | Higher input bias current (30 pA typ), higher Vos (10 mV max), 3 MHz GBW - less precision, more bandwidth | General-purpose audio and non-critical signal paths; not suitable for high-Z sensor interfaces | Select TL074CDR only when cost is primary constraint and input impedance >100 MΩ is not required |
| OPA4140AIDR | Lower Vos (125 µV max), lower noise (5.1 nV/√Hz), rail-to-rail output - higher precision, higher cost, higher IQ (1.5 mA/ch) | High-resolution data acquisition, medical instrumentation, and metrology where sub-mV offset is mandatory | Choose OPA4140AIDR when 12-bit+ accuracy is needed and power budget allows >6× higher quiescent current |
Compared with TL074CDR, OPA4137UA/2K5 provides 6× lower input bias current and 7× lower offset voltage, enabling reliable high-impedance sensing; versus OPA4140AIDR, it trades 12× lower quiescent current for relaxed offset and noise specs - optimizing for battery life in portable precision instruments.
Availability
OPA4137UA/2K5 is available at Aetrix Electronics and suitable for precision instrumentation, photodetector front-ends, and battery-powered test equipment requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for OPA4137UA/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-performance analog ICs, emphasizing precision, reliability, and broad application coverage across industrial, automotive, and medical markets.
The OPA4137UA/2K5 belongs to TI's MicroAmplifier™ series - designed specifically for low-cost, miniature, low-power precision amplification in space- and energy-constrained systems such as portable diagnostics and distributed sensor nodes.
FAQ
What is the maximum operating temperature range for the OPA4137UA/2K5?
The OPA4137UA/2K5 is specified from –40°C to +85°C for operation and storage, with extended functionality validated from –55°C to +125°C. This makes OPA4137UA/2K5 suitable for industrial environments and automotive under-hood auxiliary circuits where thermal robustness is required.
Does the OPA4137UA/2K5 support single-supply operation?
Yes, the OPA4137UA/2K5 supports single-supply operation from +4.5 V to +36 V. Its input common-mode range extends to the positive rail (V+), allowing direct interfacing with sensors referenced to V+ - a key advantage over many competing op-amps that require level-shifting in single-supply configurations.
Can the OPA4137UA/2K5 drive capacitive loads without oscillation?
Yes, the OPA4137UA/2K5 is characterized to drive up to 1000 pF capacitive loads stably without external compensation. This capability simplifies interface design to ADCs, cables, and PCB traces - eliminating the need for series isolation resistors that degrade SNR in precision applications.
Is the OPA4137UA/2K5 pin-compatible with other quad op-amps in SO-14 packages?
No - the OPA4137UA/2K5 uses a non-standard pinout optimized for low crosstalk (e.g., V+ on Pin 11, V– on Pin 4). It is not pin-compatible with industry-standard quad op-amps like LM324 or TL074. Layout redesign is required when substituting into existing SO-14 footprints.
What is the typical input voltage noise density of the OPA4137UA/2K5?
The OPA4137UA/2K5 has a typical input voltage noise density of 45 nV/√Hz at 1 kHz. This value, combined with its 5 pA input bias current, positions it well for medium-bandwidth, high-impedance applications such as photodiode transimpedance amplifiers and strain gage bridges where Johnson noise dominates.
OPA4137UA/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
OPA4137UA/2K5 FAQ
1.How can I place an order for OPA4137UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4137UA/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 OPA4137UA/2K5 reliable?
The price and inventory of OPA4137UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4137UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4137UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4137UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4137UA/2K5?
OPA4137UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4137UA/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 OPA4137UA/2K5?
For technical support, including OPA4137UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4137UA/2K5 requirements.
6.How does Aetrix verify that OPA4137UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4137UA/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 OPA4137UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4137UA/2K5?
All OPA4137UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4137UA/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 OPA4137UA/2K5 part is unused and in its original packaging.
Return procedure for OPA4137UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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