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Texas Instruments OPA2141AIDGKR
- Part No.:
- OPA2141AIDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2141AIDGKR.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,237
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Product details
Overview
OPA2141AIDGKR from Texas Instruments is a dual-channel, rail-to-rail output, JFET-input precision operational amplifier optimized for low-noise, high-impedance signal conditioning in single- or dual-supply systems. It delivers 10MHz gain bandwidth, 6.5nV/√Hz input voltage noise at 1kHz, ±20pA max input bias current, and operates from ±2.25V to ±18V (or +4.5V to +36V). It is widely used in photodiode amplification, medical instrumentation front-ends, and battery-powered data acquisition where low power and low drift are critical.
For engineers reviewing the OPA2141AIDGKR datasheet, OPA2141AIDGKR pinout, OPA2141AIDGKR application, or OPA2141AIDGKR equivalent, key selection criteria include its 2.3mA max quiescent current per channel, 10mV/°C max offset drift, no phase reversal behavior, 250nVPP 0.1Hz–10Hz noise, and MSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA2141AIDGKR employs a JFET input stage enabling ultra-low input bias current (≤20pA) and high input impedance (10¹³ Ω), making it suitable for sensor interfaces with megohm-level source impedances. Its rail-to-rail output swing (within 350mV of rails at 2kΩ load) and input common-mode range extending to V– support direct interfacing with modern SAR ADCs and low-voltage microcontrollers.
Internally compensated for unity-gain stability, it achieves 20V/ms slew rate and 880ns 12-bit settling time. The device includes internal phase-reversal protection and thermal shutdown triggered above ~180°C junction temperature-critical for robust operation in industrial environments spanning –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10MHz - supports stable closed-loop operation up to 10MHz at unity gain, enabling high-speed filtering and buffering. |
| Input Voltage Noise Density | 6.5nV/√Hz at 1kHz - ensures minimal added noise in precision analog front-ends with moderate source impedances. |
| Input Bias Current | ±20pA max - enables accurate amplification of signals from high-impedance sources like photodiodes or pH electrodes. |
| Quiescent Current | 2.3mA max per amplifier - balances low-power operation with performance, ideal for portable and battery-powered systems. |
| Offset Voltage Drift | ±10mV/°C max - guarantees stable DC accuracy over wide temperature ranges without frequent recalibration. |
| Common-Mode Input Range | V– to (V+) – 3.5V - allows input signals referenced to ground in single-supply configurations down to V–. |
| Rail-to-Rail Output | Swings within 350mV of supply rails at 2kΩ - maximizes dynamic range when driving ADCs or low-voltage logic. |
Pinout & Package
OPA2141AIDGKR is packaged in an 8-pin MSOP (DGK) with exposed pad for thermal enhancement. Pin assignments are validated per TI SBOS510B datasheet Figure "OPA2141 SO-8, MSOP-8 (TOP VIEW)".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance JFET node accepting differential input signal for first amplifier. |
| 2 | Non-Inverting Input (Channel A) | High-impedance JFET node; common-mode range extends to V– for ground-referenced sensing. |
| 3 | Output (Channel A) | Rail-to-rail capable output driving loads ≥2kΩ; limited to ±30mA sink / +36mA source. |
| 4 | V– (Negative Supply) | Reference for both amplifiers; supports single-supply (ground) or dual-supply (–Vs) operation. |
| 5 | V+ (Positive Supply) | Power rail for both amplifiers; accepts 4.5V to 36V single or ±2.25V to ±18V dual supplies. |
| 6 | Non-Inverting Input (Channel B) | Independent high-Z input for second amplifier; identical specs and layout symmetry to Pin 2. |
| 7 | Inverting Input (Channel B) | Independent high-Z input for second amplifier; identical specs and layout symmetry to Pin 1. |
| 8 | Output (Channel B) | Second rail-to-rail output; channel separation >100dB at DC ensures minimal crosstalk in dual-signal paths. |
Key Features
| Feature | Design Value |
|---|---|
| No Phase Reversal | Input overdrive beyond common-mode range causes output clamping-not inversion-enabling safe operation in non-inverting configurations with large transients. |
| Low 0.1Hz–10Hz Noise | 250nVPP integrated noise - critical for DC-coupled applications like strain gauge or thermocouple amplification where 1/f noise dominates error budget. |
| Thermal Shutdown Protection | Activates at ~180°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Wide Supply Range | Operates from ±2.25V to ±18V (or +4.5V to +36V) - eliminates need for separate voltage rails in mixed-signal systems with 3.3V, 5V, and 24V domains. |
| MSOP-8 with Exposed Pad | Small footprint (3mm × 3mm) and enhanced thermal resistance (qJA = 180°C/W) - supports high-density, thermally demanding PCB layouts. |
Applications
| Photodiode Signal Conditioning | Portable Medical Front-End |
|---|---|
Use Scenario: Amplifying weak current from reverse-biased photodiodes in pulse oximeters or spectrophotometers under battery power. IC Role / Device Role: Transimpedance amplifier (TIA) with ultra-low input bias current and low 1/f noise to preserve SNR at sub-Hz frequencies. Use Value: 20pA max IB avoids signal loss across GΩ feedback resistors; 250nVPP 0.1–10Hz noise maintains resolution for slow physiological waveforms. |
Use Scenario: Biopotential acquisition (ECG/EEG) in handheld diagnostic devices requiring low power and high CMRR. IC Role / Device Role: First-stage instrumentation amplifier input buffer with rail-to-rail output driving 16-bit SAR ADCs. Use Value: Rail-to-rail swing maximizes ADC utilization; 126dB CMRR at DC rejects common-mode interference from dry electrodes. |
| Industrial Sensor Interface | Battery-Powered Data Logger |
Use Scenario: Conditioning outputs from high-impedance pH or gas sensors in remote environmental monitoring nodes. IC Role / Device Role: Precision voltage follower and filter driver with low drift and high ZIN to avoid loading sensitive electrochemical cells. Use Value: ±10mV/°C max VOS drift ensures <1LSB error over –40°C to +85°C without calibration; 10¹³ Ω input impedance prevents sensor polarization. |
Use Scenario: Analog signal chain in solar-powered soil moisture loggers operating for years on coin-cell batteries. IC Role / Device Role: Low-quiescent-current signal conditioner preceding ADC and MCU sleep mode. Use Value: 2.3mA max IQ per channel enables multi-day continuous sampling; wide supply range accommodates decaying battery voltage from 3.6V to 2.2V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2140AIDGKR | Lower 1/f noise (150nVPP), lower input bias current (1pA), but narrower supply range (±18V only, no 4.5–36V single-supply support). | Better for ultra-low-frequency DC measurements; less flexible in mixed-voltage systems. | Select OPA2140AIDGKR when sub-100nVPP 0.1–10Hz noise is mandatory and supply rails are fixed dual ±15V. |
| OPA2277UA/2K5 | Higher precision (±25µV VOS), lower drift (0.1µV/°C), but bipolar input (2nA IB), higher IQ (800µA), and no rail-to-rail output. | Suited for lab-grade instrumentation with low-source-impedance sensors; incompatible with photodiode or battery-sensor interfaces. | Choose OPA2277UA/2K5 only when nanovolt-level DC accuracy outweighs input bias and power constraints. |
Compared with OPA2140AIDGKR and OPA2277UA/2K5, the OPA2141AIDGKR uniquely balances JFET-level input impedance, rail-to-rail output, wide supply flexibility, and 2.3mA power-making it the optimal choice for portable, high-Z, wide-temperature embedded analog front-ends where no single alternative matches all three attributes simultaneously.
Availability
OPA2141AIDGKR is available at Aetrix Electronics and suitable for photodiode amplification, portable medical instrumentation, and industrial sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2141AIDGKR 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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and signal-chain solutions.
The OPA2141AIDGKR belongs to TI's precision JFET-input op amp family, designed specifically for high-impedance, low-noise, wide-temperature applications in medical, test equipment, and industrial sensing systems.
FAQ
What is the maximum supply voltage for OPA2141AIDGKR?
The OPA2141AIDGKR supports absolute maximum supply voltages of ±20V. Its specified operating range is ±2.25V to ±18V for dual supplies or +4.5V to +36V for single supplies. Exceeding ±20V risks permanent damage per TI's Absolute Maximum Ratings table in SBOS510B. For reliable long-term operation, stay within the ±18V or +36V limits.
Does OPA2141AIDGKR have rail-to-rail input capability?
No, the OPA2141AIDGKR does not feature rail-to-rail input. Its input common-mode voltage range extends from V– to (V+) – 3.5V at ±18V supply, meaning it accepts signals down to the negative rail but not fully up to the positive rail. This design enables robust JFET input performance while maintaining low bias current and noise.
Can OPA2141AIDGKR drive capacitive loads directly?
OPA2141AIDGKR is not optimized for direct heavy capacitive loads. As shown in Figures 19–20 of SBOS510B, stability degrades with >100pF loads unless isolated by a series resistor (e.g., 50Ω). For reliable operation into cables or ADC input capacitance, add ROUT between output and load to maintain phase margin and prevent peaking or oscillation.
What is the thermal resistance (qJA) of OPA2141AIDGKR in MSOP-8 package?
The junction-to-ambient thermal resistance (qJA) for OPA2141AIDGKR in the DGK (MSOP-8) package is 180°C/W under natural convection on a JEDEC-standard high-K board, per TI's thermal metrics table in SBOS510B. This value assumes standard PCB copper area; actual performance improves with thermal vias and copper pour under the exposed pad.
Is OPA2141AIDGKR suitable for photodiode transimpedance applications?
Yes, OPA2141AIDGKR is highly suitable for photodiode TIA designs due to its ±20pA max input bias current, 250nVPP 0.1–10Hz noise, and JFET input architecture. These characteristics minimize signal loss and noise in high-gain, high-impedance feedback networks-key requirements for precision optical sensing in devices like pulse oximeters and analytical instruments.
OPA2141AIDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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:
- Rail-to-Rail
- Slew Rate:
- 20V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1.8mA (x2 Channels)
- Current - Output / Channel:
- 36 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2141AIDGKR FAQ
1.How can I place an order for OPA2141AIDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2141AIDGKR 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 OPA2141AIDGKR reliable?
The price and inventory of OPA2141AIDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2141AIDGKR is usually 5 days.
3.What payment methods are accepted for OPA2141AIDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2141AIDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2141AIDGKR?
OPA2141AIDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2141AIDGKR 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 OPA2141AIDGKR?
For technical support, including OPA2141AIDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2141AIDGKR requirements.
6.How does Aetrix verify that OPA2141AIDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2141AIDGKR 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 OPA2141AIDGKR meets industry standards.
7.What is the process for return or replacement of OPA2141AIDGKR?
All OPA2141AIDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2141AIDGKR, 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 OPA2141AIDGKR part is unused and in its original packaging.
Return procedure for OPA2141AIDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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