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Texas Instruments OPA2392DR
- Part No.:
- OPA2392DR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2392DR.pdf
- Description:
- DUAL, LOW-OFFSET (10 V), LOW-NOI
- Quantity:
- Payment:
- Shipping:
Inventory:547
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Product details
Overview
OPA2392DR from Texas Instruments is a dual-channel, rail-to-rail input/output precision operational amplifier featuring e-trim™ technology. It delivers ±10 µV max input offset voltage, ±0.18 µV/°C drift, 10 fA input bias current, 4.4 nV/√Hz noise at 10 kHz, and 13 MHz gain-bandwidth - optimized for high-accuracy signal conditioning in low-voltage (1.7–5.5 V) medical and industrial sensor front-ends.
For engineers reviewing the OPA2392DR datasheet, OPA2392DR pinout, OPA2392DR application, or OPA2392DR equivalent, this page provides verified package mapping (SOIC-8), validated dual-amplifier pin functions, confirmed thermal metrics (RθJA = 131.7 °C/W), and two production-ready alternative parts with documented functional and application differences.
Technical Context
The OPA2392DR uses TI's proprietary e-trim™ architecture to achieve ultra-low offset and drift without chopping or auto-zero circuitry - preserving DC accuracy while enabling 10 fA input bias current essential for photodiode transimpedance stages and high-impedance sensor interfaces. Its rail-to-rail I/O supports single-supply operation down to 1.7 V.
It integrates unity-gain stable 13 MHz GBW, 4.5 V/µs slew rate, and 0.75 µs settling to 0.1% for driving SAR and delta-sigma ADCs. EMI/RFI-filtered inputs and no phase reversal behavior ensure robust performance in noisy environments like patient monitors and optical modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±10 µV max - enables sub-16-bit error floor in 24-bit DAQ systems without calibration |
| Offset Drift | ±0.18 µV/°C - ensures <1 µV total drift over –40°C to +125°C operating range |
| Input Bias Current | 10 fA typical - supports >100 GΩ source impedance in pH/gas sensor front-ends |
| Input Voltage Noise | 4.4 nV/√Hz @ 10 kHz - preserves SNR in wideband optical power monitoring |
| Gain Bandwidth | 13 MHz - sufficient for closed-loop gain ≥100 with >100 kHz small-signal bandwidth |
| Supply Range | 1.7 V to 5.5 V single supply - compatible with Li-ion, 3.3 V, and 5 V industrial rails |
| Output Drive | +65 mA / –55 mA short-circuit - drives 2 kΩ loads to rail with <35 mV headroom at 5.5 V |
Pinout & Package
OPA2392DR is packaged in an 8-pin SOIC (D package) with exposed pad option not applicable. Pin functions are electrically validated per TI SBOS926I Rev. MARCH 2025.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Output, Channel A | Low-impedance rail-to-rail output capable of sourcing 65 mA or sinking 55 mA |
| 2 (–IN A) | Inverting Input, Channel A | High-impedance node with 10 fA bias current; accepts common-mode voltage to V– |
| 3 (+IN A) | Noninverting Input, Channel A | Same CMVR and bias specs as –IN A; used for differential or single-ended configurations |
| 4 (V–) | Negative Power Supply | Reference for both amplifiers; thermal pad (if present) must connect to V– |
| 5 (+IN B) | Noninverting Input, Channel B | Independent input for second amplifier; identical specs to Channel A inputs |
| 6 (–IN B) | Inverting Input, Channel B | Matches Channel A performance; supports dual-channel instrumentation topologies |
| 7 (OUT B) | Output, Channel B | Fully independent output; no crosstalk specified below –100 dB at 1 kHz |
| 8 (V+) | Positive Power Supply | Accepts up to 5.5 V; PSRR >75 dB ensures immunity to supply ripple |
Key Features
| Feature | Design Value |
|---|---|
| e-trim™ architecture | Eliminates need for chopper stabilization - avoids 1/f noise folding and clock feedthrough in sensitive analog front-ends |
| Rail-to-rail I/O | Enables full dynamic range utilization in 1.7 V single-supply systems, such as portable gas analyzers |
| EMI/RFI filtered inputs | Reduces susceptibility to GSM, Wi-Fi, and switching regulator noise in medical-grade ECG designs |
| No phase reversal | Prevents latch-up or uncontrolled output swing during input overdrive - critical in multiparameter patient monitors |
| Low 1/f noise | 2 µVPP (0.1–10 Hz) - minimizes baseline wander in DC-coupled biopotential amplifiers |
Applications
| Electrocardiogram (ECG) | Optical Power Monitor |
|---|---|
Use Scenario: Amplifying microvolt-level cardiac signals from dry electrodes in ambulatory ECG patches. IC Role / Device Role / Timing Role: First-stage low-noise, high-input-impedance instrumentation amplifier with DC-coupled rail-to-rail output. Use Value: 10 fA input bias current prevents electrode polarization; ±10 µV offset avoids baseline shift across body temperature variations. | Use Scenario: Converting photodiode current to voltage in fiber-optic transceivers for inter-DC interconnect. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with ultra-low input current and low 1/f noise for stable DC gain. Use Value: 2 µVPP (0.1–10 Hz) noise ensures accurate long-term optical power stability measurement. |
| Chemistry Analyzer | Pulse Oximeter |
Use Scenario: Signal conditioning for potentiometric pH sensors and amperometric gas sensors in handheld analyzers. IC Role / Device Role / Timing Role: Precision buffer and difference amplifier for high-impedance electrochemical cell outputs. Use Value: ±0.18 µV/°C drift maintains calibration integrity across field temperature swings without recalibration. | Use Scenario: Dual-channel analog front-end for red/IR photodiode signals in wearable pulse oximeters. IC Role / Device Role / Timing Role: Simultaneous low-noise amplification of two photodiode channels with matched gain and offset. Use Value: Dual-channel matching (±10 µV max offset mismatch) reduces SpO₂ calculation error from channel imbalance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189DR | Lower offset (±1 µV typ), higher IQ (1.3 mA vs 1.22 mA), same 13 MHz GBW and rail-to-rail I/O | Better for 24-bit+ precision DAQ where offset dominates error budget; less optimal for battery-powered devices needing lowest IQ | Select OPA2189DR when absolute offset is primary constraint; OPA2392DR preferred for ultra-low bias current (10 fA vs 20 fA) in photodiode apps |
| ADA4522-2ARZ | Zero-drift architecture, lower drift (±0.005 µV/°C), higher supply current (1.8 mA), no e-trim™ | Suitable for ultra-stable DC measurements (e.g., strain gauge bridges); introduces chopping artifacts unsuitable for optical TIA | Choose ADA4522-2ARZ for zero-drift-critical DC applications; avoid in photodiode or ECG front-ends due to chopper noise and charge injection |
Compared with OPA2189DR and ADA4522-2ARZ, the OPA2392DR uniquely balances ultra-low input bias current (10 fA), low 1/f noise (2 µVPP), and absence of chopping artifacts - making it the only choice among the three for photodiode-based optical modules and high-impedance electrochemical sensors.
Availability
OPA2392DR is available at Aetrix Electronics and suitable for electrocardiogram (ECG) systems, optical power monitors, chemistry analyzers, and pulse oximeters requiring stable component supply across automotive, medical, and industrial production cycles.
Supply support for OPA2392DR 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 is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in precision analog signal chain solutions.
The OPAx392 product line was designed specifically for high-accuracy, low-power sensor interface applications - including medical instrumentation, optical modules, and portable analytical equipment - where ultra-low input bias current and DC stability are non-negotiable.
FAQ
What is the maximum supply voltage rating for OPA2392DR?
The OPA2392DR has an absolute maximum supply voltage of 6 V for single-supply operation or ±3 V for dual-supply use. Recommended operating range is 1.7 V to 5.5 V. Exceeding 5.5 V risks permanent damage and violates TI's production specifications per SBOS926I Rev. MARCH 2025. The OPA2392DR must never be operated above 5.5 V in production designs.
Does OPA2392DR include an enable (EN) pin in the SOIC-8 (D) package?
No, the OPA2392DR in SOIC-8 (D) package does not feature an enable pin. EN functionality is only available on select packages: OPA2392YBJ (DSBGA-9) and OPA4392RTE (WQFN-16). The OPA2392DR remains continuously active when powered within its specified supply range and has no shutdown mode.
What is the typical input bias current of OPA2392DR and why does it matter?
The typical input bias current of OPA2392DR is 10 fA - among the lowest available for precision op amps. This enables accurate amplification of signals from ultra-high-impedance sources such as photodiodes, pH electrodes, and piezoelectric sensors. In a 1 GΩ source impedance, 10 fA generates only 1 mV error - critical for maintaining accuracy in OPA2392DR-based transimpedance and sensor buffer circuits.
Can OPA2392DR drive a 2 kΩ load rail-to-rail at 3.3 V supply?
Yes, the OPA2392DR can drive a 2 kΩ load to within 30 mV of each rail at 3.3 V supply, per electrical characteristics in SBOS926I. Output swing is specified as 20–30 mV from rails under 2 kΩ load, ensuring >98% of full-scale range usability. This rail-to-rail capability makes OPA2392DR ideal for single-supply 3.3 V data acquisition and portable medical devices.
Is OPA2392DR suitable for driving high-resolution ADCs like the ADS127L01?
Yes, OPA2392DR is explicitly optimized for driving high-resolution ADCs. Its 13 MHz GBW, 4.5 V/µs slew rate, 0.75 µs settling to 0.1%, and low 4.4 nV/√Hz noise ensure minimal distortion and aperture uncertainty when buffering the ADS127L01 or similar 24-bit delta-sigma converters. TI's datasheet confirms OPA2392DR as a recommended driver for precision DAQ systems.
OPA2392DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 2
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 4.5V/µs
- Gain Bandwidth Product:
- 13 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.01 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 1.22mA (x2 Channels)
- Current - Output / Channel:
- 65 mA
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2392DR FAQ
1.How can I place an order for OPA2392DR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2392DR 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 OPA2392DR reliable?
The price and inventory of OPA2392DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2392DR is usually 5 days.
3.What payment methods are accepted for OPA2392DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2392DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2392DR?
OPA2392DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2392DR 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 OPA2392DR?
For technical support, including OPA2392DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2392DR requirements.
6.How does Aetrix verify that OPA2392DR is sourced from the original manufacturer or authorized distributors?
All OPA2392DR 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 OPA2392DR meets industry standards.
7.What is the process for return or replacement of OPA2392DR?
All OPA2392DR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2392DR, 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 OPA2392DR part is unused and in its original packaging.
Return procedure for OPA2392DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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