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Texas Instruments OPA2137U/2K5
- Part No.:
- OPA2137U/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2137U/2K5.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,559
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Product details
Overview
OPA2137U/2K5 from Texas Instruments (formerly Burr-Brown) is a dual FET-input operational amplifier in SO-8 package, delivering 1 MHz gain-bandwidth, 3.5 V/µs slew rate, ±2.25V to ±18V dual-supply operation, and 5 pA input bias current - ideal for precision photodetector amplification and battery-powered instrumentation.
For engineers reviewing the OPA2137U/2K5 datasheet, OPA2137U/2K5 pinout, OPA2137U/2K5 application, or OPA2137U/2K5 equivalent, key selection criteria include input bias current stability over temperature, rail-to-rail input common-mode range including V+, low quiescent current per channel (220 µA), and guaranteed performance from –40°C to +85°C.
Technical Context
The OPA2137U/2K5 implements fully independent dual-channel circuitry with no crosstalk-channel separation exceeds 120 dB at DC and remains >60 dB up to 100 kHz. Its FET-input architecture enables high-impedance signal conditioning without phase inversion, even when inputs exceed the positive supply rail.
Designed for unity-gain stability, it supports precision integrator and active filter topologies with 94 dB open-loop gain, 76 dB CMRR (typical), and 0.05% THD+N at 1 kHz. Input voltage noise is 45 nV/√Hz at 1 kHz; current noise is 1.2 fA/√Hz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1 MHz - supports stable closed-loop operation up to 100 kHz with gain ≥10. |
| Slew Rate | 3.5 V/µs - enables ≤10 µs settling to 0.01% for 10 V step with 100 pF load. |
| Input Bias Current | ±5 pA (typ) - preserves signal integrity in high-impedance sensor interfaces (e.g., photodiodes, strain gages). |
| Supply Voltage Range | ±2.25 V to ±18 V - operates from low-voltage portable systems to industrial ±15 V rails. |
| Quiescent Current | ±220 µA per channel - enables multi-channel precision analog front-ends in power-constrained designs. |
| Input Common-Mode Range | (V–) + 3 V to V+ - supports high-side current sensing and single-supply configurations without level-shifting. |
| Open-Loop Gain | 94 dB - ensures <0.01% gain error in 100× amplification of mV-level signals. |
Pinout & Package
OPA2137U/2K5 is packaged in an 8-pin SOIC (SO-8) surface-mount package per JEDEC MS-012, with thermal resistance θJA = 150°C/W. Pin numbering follows standard SO-8 convention (counterclockwise from notch).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +In A | Non-inverting input of Channel A - accepts signals up to V+ with no phase reversal. |
| 2 | –In A | Inverting input of Channel A - used for feedback or differential input configuration. |
| 3 | Out A | Output of Channel A - drives loads up to 1000 pF; short-circuit protected. |
| 4 | V– | Negative supply rail - must be bypassed with ≥10 nF ceramic capacitor near pin. |
| 5 | V+ | Positive supply rail - shared by both amplifiers; requires local bypassing. |
| 6 | +In B | Non-inverting input of Channel B - electrically isolated from Channel A. |
| 7 | –In B | Inverting input of Channel B - supports independent feedback network design. |
| 8 | Out B | Output of Channel B - delivers identical AC/DC performance as Out A with <0.6 µV/V channel separation. |
Key Features
| Feature | Design Value |
|---|---|
| FET input stage | 5 pA input bias current enables direct connection to high-Z sources like photodiodes without signal degradation. |
| Rail-to-rail input common-mode range | Extends to V+, allowing high-side current sensing and single-supply operation without external bias networks. |
| Independent dual-channel architecture | No crosstalk between channels - critical for simultaneous signal conditioning in multi-sensor systems. |
| Unity-gain stable | Operates reliably in voltage-follower, integrator, and active filter configurations without external compensation. |
| Specified over –40°C to +85°C | All key parameters (VOS, IB, GBW, SR) are 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 with high common-mode rejection and ultra-low input current to prevent bridge imbalance errors. Use Value: 5 pA IB avoids loading high-resistance bridge arms; 1.5 mV VOS enables sub-0.1% measurement accuracy without trimming. | Use Scenario: Transimpedance amplification of current from BPW34 or similar silicon photodiodes in optical encoders or ambient light sensors. IC Role / Device Role / Timing Role: Low-noise, unity-gain stable transimpedance amplifier with input referenced to V+ for high-side photodiode biasing. Use Value: 45 nV/√Hz voltage noise and 1.2 fA/√Hz current noise preserve SNR in low-light conditions; rail-to-rail input accommodates photodiode cathode at V+. |
| Precision Integrator | Battery-Powered Instruments |
Use Scenario: Analog integration in PID controllers, waveform generators, or charge accumulation circuits requiring long time constants. IC Role / Device Role / Timing Role: Op-amp core in integrator topology with low input bias current to minimize drift and leakage-induced error. Use Value: 5 pA IB limits integration error to <1 µV/s at 1 nF capacitance; 94 dB AOL ensures linearity over wide dynamic range. | Use Scenario: Portable multimeters, handheld gas analyzers, or wearable health monitors operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Signal conditioning amplifier in low-power analog front-end with shutdown not required due to ultra-low IQ. Use Value: 220 µA per channel allows dual-channel sensing for <500 µA total analog subsystem current; ±2.25 V minimum supply enables operation down to 4.5 V single supply. |
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 |
|---|---|---|---|
| TL072CDR | Higher input bias current (30 pA typ), lower CMRR (70 dB min), wider offset voltage spread (±10 mV max). | Less suitable for high-impedance photodiode or precision integrator use where IB and VOS dominate error budget. | Lower-cost option where 5 pA IB and 1.5 mV VOS are not required. |
| OPA2140AIDR | Zero-drift architecture, 110 dB CMRR, 0.1 µV/°C drift, but higher IQ (1.5 mA/channel) and cost. | Preferred for microvolt-level DC stability in lab-grade instruments; overkill for battery-powered portable devices. | Select when long-term DC accuracy outweighs power consumption constraints. |
Compared with TL072CDR and OPA2140AIDR, the OPA2137U/2K5 uniquely balances ultra-low input bias current (5 pA), low quiescent power (220 µA/channel), and rail-to-rail input capability - making it optimal for precision, low-power, high-impedance sensor interfaces where zero-drift isn't mandatory.
Availability
OPA2137U/2K5 is available at Aetrix Electronics and suitable for strain gage amplifiers, photodetector front-ends, and precision integrators requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for OPA2137U/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 precision analog ICs, emphasizing high-performance, low-power, and robust signal conditioning solutions.
The OPA2137U/2K5 belongs to the MicroAmplifier™ series - designed specifically for miniature, low-cost, high-precision applications demanding FET-input performance in space-constrained PCB layouts.
FAQ
What is the maximum capacitive load the OPA2137U/2K5 can drive while maintaining stability?
The OPA2137U/2K5 is specified to drive up to 1000 pF capacitive load without external compensation. This capability supports direct connection to ADC input capacitors, long cables, or multiple downstream stages. For loads exceeding 1000 pF, a small series resistor (e.g., 10–50 Ω) at the output is recommended to isolate the capacitance and preserve phase margin. Stability is verified across –40°C to +85°C with ±15 V supplies.
Does the OPA2137U/2K5 support single-supply operation, and what is the minimum supply voltage?
Yes, the OPA2137U/2K5 supports single-supply operation from +4.5 V to +36 V. Its input common-mode range extends to the positive rail (V+), enabling true single-supply configurations without level-shifting. At minimum supply (+4.5 V), inputs must remain ≥3 V above V– (i.e., ≥3 V) to stay within linear range. The device draws only 220 µA per channel, making it well-suited for battery-powered OPA2137U/2K5 implementations.
How does the input bias current of the OPA2137U/2K5 vary with temperature and common-mode voltage?
The OPA2137U/2K5 exhibits ±5 pA typical 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 input voltage approaches V–, reaching ~1 nA at VCM = –15 V (with V– = –15 V). This behavior is inherent to JFET input stages and is documented in the "Input Bias Current vs Common-Mode Voltage" plot of the OPA2137U/2K5 datasheet.
Is the OPA2137U/2K5 pin-compatible with other dual op-amps in SO-8 packages such as the TL072 or LM358?
No, the OPA2137U/2K5 is not pin-compatible with TL072 or LM358. While all three use SO-8 packages, the OPA2137U/2K5 follows the industry-standard dual op-amp pinout (1=+In A, 2=–In A, 3=Out A, 4=V–, 5=V+, 6=+In B, 7=–In B, 8=Out B), whereas TL072 and LM358 swap pins 1 and 5 (V+ on pin 8 for LM358, V+ on pin 8 for TL072). Substitution requires PCB layout revision. Always verify pinout using the OPA2137U/2K5 datasheet before replacement.
What packaging and tape-and-reel options are available for the OPA2137U/2K5?
The OPA2137U/2K5 is supplied in SOIC-8 (D package) format on 2500-unit tape-and-reel (reel width 12.4 mm, diameter 330 mm, Q1 pin 1 quadrant). It is RoHS-compliant, green (low-halogen), with NIPDAU lead finish and JEDEC MSL Level-3 moisture sensitivity rating (260°C peak, 168-hour floor life). No tray or tube variants exist for this specific orderable part number - only tape-and-reel delivery is offered by Texas Instruments for OPA2137U/2K5.
OPA2137U/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
OPA2137U/2K5 FAQ
1.How can I place an order for OPA2137U/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2137U/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 OPA2137U/2K5 reliable?
The price and inventory of OPA2137U/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2137U/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2137U/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2137U/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2137U/2K5?
OPA2137U/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2137U/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 OPA2137U/2K5?
For technical support, including OPA2137U/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2137U/2K5 requirements.
6.How does Aetrix verify that OPA2137U/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2137U/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 OPA2137U/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2137U/2K5?
All OPA2137U/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2137U/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 OPA2137U/2K5 part is unused and in its original packaging.
Return procedure for OPA2137U/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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