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Texas Instruments OPA2137EA/250G4
- Part No.:
- OPA2137EA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2137EA/250G4.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,509
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Product details
Overview
OPA2137EA/250G4 from Texas Instruments (formerly Burr-Brown) is a dual FET-input operational amplifier in an 8-pin MSOP package, designed for low-cost, space-constrained precision applications. It delivers 5 pA input bias current, ±1.5 mV max input offset voltage, 1 MHz gain-bandwidth product, and operates from ±2.25 V to ±18 V supplies - enabling use in battery-powered instrumentation and photodetector front-ends.
For engineers reviewing the OPA2137EA/250G4 datasheet, OPA2137EA/250G4 pinout, OPA2137EA/250G4 application, or OPA2137EA/250G4 equivalent, key selection criteria include its rail-to-rail input capability (extends to V+), 220 µA/channel quiescent current, 3.5 V/µs slew rate, and guaranteed performance over –40°C to +85°C.
Technical Context
The OPA2137EA/250G4 integrates two fully independent FET-input amplifier channels in a single MSOP-8 die, eliminating crosstalk and interaction during overload or short-circuit conditions. Its input stage supports common-mode voltages up to the positive supply rail, enabling high-side current sensing and single-supply operation with minimal external biasing.
It features unity-gain stability, no phase inversion under common-mode overvoltage, and maintains linearity across full output swing. The architecture combines high open-loop gain (94 dB), low 1/f noise (2 µVP-P, 0.1–10 Hz), and robust capacitive load drive (up to 1000 pF), making it suitable for active filters and precision integrators without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | ±5 pA at +25°C - enables high-impedance sensor interfaces (e.g., photodiodes, strain gages) without significant error. |
| Input Offset Voltage | ±1.5 mV max (TA = –40°C to +85°C) - ensures <0.01% gain error in 100 mV full-scale measurement systems. |
| Gain-Bandwidth Product | 1 MHz - supports stable closed-loop gain ≥10 up to ~100 kHz, sufficient for anti-aliasing and signal conditioning filters. |
| Slew Rate | 3.5 V/µs - allows 10 V step response settling within 8 µs (0.1%), critical for fast-settling data acquisition front-ends. |
| Supply Range | ±2.25 V to ±18 V (dual) or +4.5 V to +36 V (single) - accommodates both low-voltage portable designs and industrial ±15 V systems. |
| Quiescent Current | ±220 µA per channel - enables dual-channel precision amplification with <450 µA total IQ, ideal for battery life extension. |
| Input Common-Mode Range | (V–) + 3 V to V+ - permits direct high-side current sensing without level-shifting circuitry. |
Pinout & Package
OPA2137EA/250G4 is packaged in an 8-pin MSOP (VSSOP-8, package drawing DGK), measuring 3.0 mm × 3.0 mm × 1.0 mm with 0.5 mm pitch. This ultra-miniature surface-mount package supports high-density PCB layouts while maintaining thermal resistance of 150°C/W (θJA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V– | Negative supply rail connection for both amplifiers; must be decoupled with ≥10 nF ceramic capacitor. |
| 2 | –In B | Inverting input of Channel B; high-impedance FET node (1012 Ω || 2 pF). |
| 3 | +In B | Non-inverting input of Channel B; supports common-mode voltage up to V+. |
| 4 | Out B | Output of Channel B; drives loads up to 1000 pF and ±25/+60 mA short-circuit current. |
| 5 | Out A | Output of Channel A; electrically isolated from Channel B to prevent crosstalk. |
| 6 | –In A | Inverting input of Channel A; identical electrical characteristics to Pin 2. |
| 7 | +In A | Non-inverting input of Channel A; shares same input structure and voltage range as Pin 3. |
| 8 | V+ | Positive supply rail connection for both amplifiers; requires local 10 nF bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| FET input stage | 5 pA input bias current enables >1 GΩ source impedance interfacing without significant offset drift. |
| Rail-to-rail input (to V+) | Eliminates need for input bias networks in high-side current monitor circuits, reducing component count and board area. |
| No phase inversion | Prevents catastrophic output reversal when inputs exceed common-mode range - critical for voltage-follower control loops. |
| Independent dual-channel design | Full isolation between Channel A and B ensures one channel's overload or fault does not degrade the other's performance. |
| Low 1/f noise | 2 µVP-P (0.1–10 Hz) supports DC-coupled precision measurements in weigh scales and medical sensors. |
Applications
| Strain Gage Amplifier | Photodetector Amplifier |
|---|---|
Use Scenario: Wheatstone bridge output from metal foil or semiconductor strain gages in load cells or pressure transducers. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end with high-Z differential input and low drift. Use Value: 5 pA input bias current prevents bridge imbalance errors; ±1.5 mV offset ensures <0.1% full-scale error in 1.5 mV/V gage output systems. | Use Scenario: Transimpedance amplification of current from BPW34 or similar silicon photodiodes in optical encoders or spectrophotometers. IC Role / Device Role / Timing Role: Low-noise, unity-gain stable TIA with wide input common-mode range. Use Value: Input extends to V+ allows direct connection to photodiode cathode at supply rail; 45 nV/√Hz voltage noise preserves SNR in low-light detection. |
| Precision Integrator | Battery-Powered Instruments |
Use Scenario: Analog computing and waveform generation requiring long time-constant integration with minimal input current error. IC Role / Device Role / Timing Role: Op-amp in feedback loop with high-value integrating capacitor (e.g., 10 nF–1 µF). Use Value: 5 pA input bias current limits integrator drift to <0.2 mV/s with 100 nF capacitor - enabling >10-second stable integration windows. | Use Scenario: Portable multimeters, handheld gas analyzers, or IoT sensor nodes operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Signal conditioning amplifier in ultra-low-power analog front-end. Use Value: 220 µA/channel quiescent current allows dual-channel amplification with <0.5 mW total power at ±5 V - extending battery life beyond 1 year in sleep-active cycling. |
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 |
|---|---|---|---|
| OPA2137U/2K5 | SO-8 package (larger footprint, 150°C/W θJA), same electrical specs and marking (OPA2137U). | Preferred where manual assembly, rework, or legacy SO-8 layout reuse is required. | Select OPA2137U/2K5 only if MSOP-8 assembly infrastructure is unavailable or thermal margin exceeds 150°C/W. |
| TL072CDR | Higher input bias current (30 pA typ), higher offset (6 mV max), lower GBW (3 MHz), but wider temp range (–40°C to +125°C). | Acceptable in non-critical AC-coupled audio or general-purpose filtering where precision is secondary. | Choose TL072CDR only when cost is primary constraint and 5 pA bias or ±1.5 mV offset are not required. |
Compared with OPA2137U/2K5, the OPA2137EA/250G4 saves >50% board area and improves thermal performance in compact layouts; versus TL072CDR, it provides 6× lower input bias current and 4× tighter offset - essential for DC-coupled precision sensing.
Availability
OPA2137EA/250G4 is available at Aetrix Electronics and suitable for strain gage amplifiers, photodetector front-ends, and battery-powered instrumentation requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.
Supply support for OPA2137EA/250G4 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 (TI) is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in precision op-amps dating back to Burr-Brown acquisition.
The OPA2137EA/250G4 belongs to TI's MicroAmplifier™ series - engineered specifically for miniature, low-cost, high-impedance signal conditioning in portable and space-constrained systems.
FAQ
What is the maximum capacitive load the OPA2137EA/250G4 can drive without instability?
The OPA2137EA/250G4 is specified to drive up to 1000 pF capacitively without requiring external compensation. This capability is verified across temperature and supply voltage ranges, supporting direct connection to ADC input capacitors, long cables, or multi-pole filter stages. For loads exceeding 1000 pF, a small series resistor (10–50 Ω) at the output is recommended to maintain phase margin.
Does the OPA2137EA/250G4 support single-supply operation, and what is the minimum usable supply voltage?
Yes, the OPA2137EA/250G4 supports true single-supply operation from +4.5 V to +36 V. At minimum supply (+4.5 V), the input common-mode range remains (V–) + 3 V to V+, meaning inputs must be biased above 3 V for linear operation. Output swing is specified from (V–) + 1.2 V to (V+) – 1.1 V, enabling >2.5 V peak-to-peak signal headroom at +4.5 V supply.
How does the input bias current of the OPA2137EA/250G4 vary with temperature and common-mode voltage?
The OPA2137EA/250G4 exhibits ±5 pA input bias current at +25°C, rising to ~100 pA at +125°C per typical curve. It also varies with common-mode voltage: bias current increases exponentially as the voltage between V– and the input approaches 0 V, reaching ~1 nA near V–. This behavior is inherent to JFET input stages and must be considered when biasing high-impedance sources near the negative rail.
Is the OPA2137EA/250G4 pin-compatible with other devices in the OPA137 family, such as the OPA2137U or OPA2137P?
Yes - all dual variants in the OPA137 family (OPA2137E, OPA2137EA, OPA2137U, OPA2137UA, OPA2137P, OPA2137PA) share identical 8-pin pinouts across MSOP-8, SO-8, and PDIP-8 packages. The OPA2137EA/250G4 uses the same pin mapping as shown in the datasheet: Pins 1 (V–), 2 (–In B), 3 (+In B), 4 (Out B), 5 (Out A), 6 (–In A), 7 (+In A), 8 (V+).
What is the ESD sensitivity classification of the OPA2137EA/250G4, and how should it be handled during assembly?
The OPA2137EA/250G4 is classified as ESD-sensitive per JEDEC JS-001 Class 2 (>2 kV HBM). TI recommends handling only with grounded wrist straps and ESD-safe work surfaces, using ionized air blowers for cleaning, and avoiding contact with pins prior to soldering. Board-level protection (e.g., series resistors, TVS diodes) is advised for inputs exposed to connectors or cables outside shielded enclosures.
OPA2137EA/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-VSSOP
OPA2137EA/250G4 FAQ
1.How can I place an order for OPA2137EA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2137EA/250G4 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 OPA2137EA/250G4 reliable?
The price and inventory of OPA2137EA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2137EA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA2137EA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2137EA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2137EA/250G4?
OPA2137EA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2137EA/250G4 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 OPA2137EA/250G4?
For technical support, including OPA2137EA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2137EA/250G4 requirements.
6.How does Aetrix verify that OPA2137EA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA2137EA/250G4 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 OPA2137EA/250G4 meets industry standards.
7.What is the process for return or replacement of OPA2137EA/250G4?
All OPA2137EA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2137EA/250G4, 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 OPA2137EA/250G4 part is unused and in its original packaging.
Return procedure for OPA2137EA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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