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Texas Instruments OPA2137EA/2K5
- Part No.:
- OPA2137EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2137EA/2K5.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,218
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Product details
Overview
OPA2137EA/2K5 from Texas Instruments (formerly Burr-Brown) is a dual FET-input operational amplifier in MSOP-8 package, delivering 5 pA input bias current, 1.5 mV max input offset voltage, 1 MHz gain-bandwidth, ±2.25 V to ±18 V supply range, and 220 µA per channel quiescent current. It serves precision signal conditioning in battery-powered instruments and photodetector front-ends.
For engineers reviewing the OPA2137EA/2K5 datasheet, OPA2137EA/2K5 pinout, OPA2137EA/2K5 application, or OPA2137EA/2K5 equivalent, key selection criteria include rail-to-rail input capability (extends to V+), low power consumption, high common-mode rejection (76 dB), and guaranteed performance from –40°C to +85°C in miniature surface-mount packaging.
Technical Context
The OPA2137EA/2K5 implements a JFET-input stage enabling ultra-low input bias current and wide common-mode input range up to the positive supply rail. Its unity-gain stable architecture supports precision integrators and strain gage amplifiers without external compensation.
Each amplifier operates independently with no crosstalk-channel separation exceeds 120 dB at DC-making it suitable for dual-path sensor interfaces where signal integrity across channels is critical. Input voltage noise is 45 nV/√Hz at 1 kHz, and slew rate is 3.5 V/µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | ±5 pA - enables high-impedance sensor interfacing (e.g., photodiodes, piezoelectric elements) without significant error. |
| Input Offset Voltage | ±1.5 mV (max) - ensures ≤0.01% gain error in 100× amplification of mV-level signals. |
| Gain-Bandwidth Product | 1 MHz - supports stable closed-loop operation up to 100 kHz at G = 10 with adequate phase margin. |
| Supply Voltage Range | ±2.25 V to ±18 V - accommodates single-supply (4.5–36 V) and split-supply systems including industrial ±15 V rails. |
| Quiescent Current | 220 µA per channel - allows dual-channel precision amplification in sub-500 µA total system standby budgets. |
| Common-Mode Input Range | (V−) + 3 V to V+ - permits direct sensing of signals referenced to positive rail (e.g., high-side current monitoring). |
| Open-Loop Gain | 94 dB - provides ≥10,000 V/V loop gain for accurate closed-loop gain setting with <0.1% error at G = 100. |
Pinout & Package
OPA2137EA/2K5 is packaged in an 8-pin MSOP (VSSOP-8, package drawing DGK), measuring 3.0 mm × 3.0 mm × 1.0 mm with 0.65 mm pitch. Thermal resistance θJA is 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V− | Negative supply rail connection; must be decoupled with ≥10 nF ceramic capacitor near pin. |
| 2 | Inverting Input B | Inverting input of second amplifier; accepts common-mode voltages up to V+. |
| 3 | Non-inverting Input B | Non-inverting input of second amplifier; internally diode-clamped to V+ and V− for ESD protection. |
| 4 | Output B | Amplified output of second channel; drives loads up to 1000 pF capacitively. |
| 5 | Output A | Amplified output of first channel; independent from Output B with no crosstalk. |
| 6 | Inverting Input A | Inverting input of first amplifier; identical electrical behavior to Pin 2. |
| 7 | Non-inverting Input A | Non-inverting input of first amplifier; identical electrical behavior to Pin 3. |
| 8 | V+ | Positive supply rail connection; requires local 10 nF bypass capacitor to minimize PSRR degradation. |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | 5 pA input bias current enables use with >1 GΩ source impedances without measurable offset drift. |
| Rail-to-rail input common-mode range | Input operates up to V+, eliminating need for level-shifting in high-side current-sense applications. |
| Independent dual-channel design | No interaction between channels-even under overload or short-circuit-ensures reliability in multi-sensor systems. |
| Unity-gain stability | Operates stably at G = 1 without external compensation, simplifying active filter and buffer designs. |
| Specified over –40°C to +85°C | All key parameters (offset, CMRR, GBW) are production-tested and guaranteed across industrial temperature range. |
Applications
| Strain Gage Amplifier | Photodetector Amplifier |
|---|---|
Use Scenario: Wheatstone bridge output from metallic foil or semiconductor strain gages in load cells or pressure sensors. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end providing high-Z differential gain with minimal input current-induced error. Use Value: 5 pA input bias current prevents bridge imbalance errors; 1.5 mV offset ensures <0.1% full-scale error in 1 mV/V gage output systems. | Use Scenario: Transimpedance amplification of nanoamp-level photocurrent from BPW34 or similar silicon photodiodes. IC Role / Device Role / Timing Role: Low-noise, low-input-current transimpedance amplifier converting photodiode current to voltage. Use Value: 45 nV/√Hz input voltage noise and 5 pA bias current preserve SNR in low-light detection; 1 MHz bandwidth supports >100 kHz optical modulation. |
| Precision Integrator | Battery-Powered Instruments |
Use Scenario: Analog integration in PID controllers, ramp generators, or charge accumulation circuits requiring long time constants. IC Role / Device Role / Timing Role: Op-amp configured as integrator with feedback capacitor and precision resistor. Use Value: Ultra-low input bias current minimizes integration drift; 94 dB open-loop gain ensures linearity over decades of integration time. | Use Scenario: Signal conditioning in handheld multimeters, portable gas analyzers, or wearable health monitors. IC Role / Device Role / Timing Role: Dual-channel analog front-end for sensor excitation and measurement with shared supply rails. Use Value: 220 µA/channel quiescent current enables >100-hour battery life on two AA cells; MSOP-8 footprint saves PCB area vs SO-8. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual FET-input op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2134UA/2K5 | Lower input bias current (1 pA), higher GBW (8 MHz), higher IQ (4 mA/channel), SO-8 only. | Higher speed and lower bias suit audio preamps; unsuitable for ultra-low-power battery systems. | Select when bandwidth >1 MHz and bias <5 pA are required, and power budget allows >3 mA total. |
| TL072CDR | Higher input bias (30 pA), higher offset (10 mV), lower PSRR (70 dB), same SO-8 package. | Cost-optimized general-purpose use; not suitable for high-impedance or precision DC-coupled designs. | Select for non-critical AC-coupled applications where cost is primary and input impedance >100 MΩ is not required. |
Compared with OPA2137EA/2K5, OPA2134UA/2K5 offers superior speed and bias performance at significantly higher power cost, while TL072CDR trades precision and input impedance for cost and availability-neither is pin-compatible, and both require layout changes and recalibration.
Availability
OPA2137EA/2K5 is available at Aetrix Electronics and suitable for precision instrumentation, photodetection systems, and battery-powered test equipment requiring stable component supply, consistent parametric performance, and long-term industrial temperature support.
Supply support for OPA2137EA/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 reliable signal-conditioning ICs for industrial and instrumentation markets.
The OPA2137EA/2K5 belongs to the MicroAmplifier™ series, designed specifically for miniature, low-cost, high-precision applications where FET-input performance, small packaging, and wide supply flexibility are essential.
FAQ
What is the maximum capacitive load the OPA2137EA/2K5 can drive without instability?
The OPA2137EA/2K5 is specified to drive up to 1000 pF capacitive load while maintaining stability and specified settling time. For loads exceeding 100 pF, a small series resistor (10–50 Ω) between output and load is recommended to isolate capacitive reactance and preserve phase margin. This value is confirmed in the Absolute Maximum Ratings table and validated in Typical Performance Curves.
Does the OPA2137EA/2K5 exhibit phase reversal when inputs exceed the common-mode range?
No, the OPA2137EA/2K5 does not exhibit phase reversal when inputs exceed the common-mode range. Unlike many older FET-input op-amps (e.g., TL061), its input stage is designed to avoid output polarity inversion even when inputs go beyond (V−)+3 V or below V+, ensuring safe operation in voltage-follower configurations and control loops.
What is the thermal resistance (θJA) of the OPA2137EA/2K5 in its MSOP-8 package?
For the OPA2137EA/2K5 in the MSOP-8 (VSSOP-8) package, the junction-to-ambient thermal resistance θJA is 150°C/W under standard JEDEC PCB conditions (2-layer board, 1 in² copper). This value is explicitly listed in the "Thermal Resistance" section of the datasheet and applies to the DGK package drawing used for OPA2137EA/2K5.
Can the OPA2137EA/2K5 operate from a single +5 V supply?
Yes, the OPA2137EA/2K5 supports single-supply operation from +4.5 V to +36 V. At +5 V, the input common-mode range extends from (V−)+3 V = +3 V to V+ = +5 V, and output swings from ~+1.2 V to ~+3.9 V. Proper input biasing within this window and output load considerations are required for linear operation.
Is the OPA2137EA/2K5 RoHS-compliant and lead-free?
Yes, the OPA2137EA/2K5 is RoHS-compliant and lead-free. Per TI's Package Option Addendum, it carries a "Green (RoHS & no Sb/Br)" eco plan with NIPDAU lead finish and complies with JEDEC MSL Level-3 moisture sensitivity classification for surface-mount reflow processing.
OPA2137EA/2K5 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:
- 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-VSSOP
OPA2137EA/2K5 FAQ
1.How can I place an order for OPA2137EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2137EA/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 OPA2137EA/2K5 reliable?
The price and inventory of OPA2137EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2137EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2137EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2137EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2137EA/2K5?
OPA2137EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2137EA/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 OPA2137EA/2K5?
For technical support, including OPA2137EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2137EA/2K5 requirements.
6.How does Aetrix verify that OPA2137EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2137EA/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 OPA2137EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2137EA/2K5?
All OPA2137EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2137EA/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 OPA2137EA/2K5 part is unused and in its original packaging.
Return procedure for OPA2137EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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