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Texas Instruments OPA141AIDGKR
- Part No.:
- OPA141AIDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA141AIDGKR.pdf
- Description:
- IC OPAMP JFET 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,395
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Product details
Overview
OPA141AIDGKR from Texas Instruments is a single-channel, rail-to-rail output, JFET-input operational amplifier optimized for precision low-noise signal conditioning in high-impedance sensor and data acquisition systems. It delivers 10MHz gain bandwidth, 6.5nV/√Hz input voltage noise density at 1kHz, ±2.25V to ±18V dual-supply operation (or +4.5V to +36V single supply), and 20V/ms slew rate while consuming only 1.8mA typical quiescent current.
For engineers reviewing the OPA141AIDGKR datasheet, OPA141AIDGKR pinout, OPA141AIDGKR application, or OPA141AIDGKR equivalent, this device is selected for battery-powered instrumentation, photodiode amplification, and industrial control loops where low input bias current (20pA max), low 1/f noise (250nVPP, 0.1–10Hz), and no phase reversal under overdrive are critical design requirements.
Technical Context
The OPA141AIDGKR employs a JFET input stage with ultra-low input bias current and high input impedance (10¹³ Ω || 8 pF), enabling accurate amplification of high-impedance sources such as piezoelectric sensors and photodiodes. Its rail-to-rail output swing (within 0.35V of rails at 2kΩ load) and extended common-mode input range (V– –0.1V to V+ –3.5V) support direct interfacing with modern SAR and delta-sigma ADCs operating on single supplies.
It features internal phase-reversal protection, eliminating output inversion when inputs exceed the common-mode range - a known failure mode in many FET-input op amps. The device achieves unity-gain stability without external compensation and maintains 126dB open-loop gain (typ) and 120dB CMRR over temperature (–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 for fast signal conditioning. |
| Input Voltage Noise Density | 6.5nV/√Hz at 1kHz - enables high-fidelity amplification of microvolt-level signals without significant noise degradation. |
| Input Bias Current | 20pA max - minimizes voltage error across high-impedance source networks (e.g., >100MΩ photodiode circuits). |
| Quiescent Current | 1.8mA typ - allows use in portable, battery-powered instruments with multi-year runtime requirements. |
| Common-Mode Input Range | V– –0.1V to V+ –3.5V - permits direct sensing of signals referenced to negative rail in single-supply systems. |
| Rail-to-Rail Output Swing | (V–)+0.35V to (V+)–0.35V at 2kΩ - maximizes dynamic range into ADCs and preserves resolution near supply rails. |
| Supply Voltage Range | ±2.25V to ±18V (dual) or +4.5V to +36V (single) - accommodates wide industrial and test equipment power architectures. |
Pinout & Package
OPA141AIDGKR is packaged in an 8-pin MSOP (DGK) with exposed thermal pad, offering compact footprint and enhanced thermal performance (θJA = 180°C/W). Pin assignments are validated per TI SBOS510B datasheet Figure 7 (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No internal connection | Unused pin; must be left floating or tied to ground per layout best practice for noise immunity. |
| 2 (–IN) | Inverting input | Differential input node; high-impedance JFET gate with 20pA max bias current. |
| 3 (+IN) | Non-inverting input | Differential input node; identical impedance and bias characteristics as Pin 2. |
| 4 (V–) | Negative supply rail | Connects to system ground (single supply) or negative rail (dual supply); reference for internal biasing. |
| 5 (OUT) | Amplifier output | Capable of sourcing +36mA / sinking –30mA; rail-to-rail swing supports full-scale ADC interfacing. |
| 6 (NC) | No internal connection | Unused pin; electrically isolated - no routing or connection required. |
| 7 (V+) | Positive supply rail | Accepts +4.5V to +36V (single) or connects to positive rail in dual-supply configurations. |
| 8 (NC) | No internal connection | Unused pin; not bonded - leave unconnected per TI package marking guidance. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Prevents output inversion during input overdrive beyond common-mode range - eliminates latch-up risk in noninverting configurations. |
| Low 1/f noise | 250nVPP (0.1–10Hz) - critical for precision DC and low-frequency measurements (e.g., strain gauges, thermopiles). |
| Thermal shutdown protection | Activates at ~180°C junction temperature with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB heat sinking. |
| Wide supply range | Operates from ±2.25V to ±18V - supports legacy ±15V systems and modern low-voltage industrial controllers without level-shifting. |
| High CMRR | 126dB typ (25°C), 120dB min (–40°C to +125°C) - rejects power supply ripple and EMI-coupled common-mode interference in noisy environments. |
Applications
| Photodiode Amplification | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Amplifying nanoamp-level photocurrent from reverse-biased silicon photodiodes in portable spectrometers or medical pulse oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) front-end with ultra-low input bias current and low voltage noise to preserve SNR. Use Value: 20pA max input bias current avoids signal loss across high-value feedback resistors (e.g., 100MΩ–1GΩ), while 6.5nV/√Hz noise ensures minimal contribution to total circuit noise. |
Use Scenario: Signal conditioning for multi-channel handheld multimeters or environmental sensors powered by two AA cells (3V nominal). IC Role / Device Role / Timing Role: Precision buffer and gain stage before low-power SAR ADC, operating from 3V to 3.6V single supply. Use Value: Rail-to-rail output swing and V–-inclusive input range enable full utilization of 3V supply headroom; 1.8mA quiescent current extends battery life beyond 500 hours at 100μA system sleep current. |
| Industrial Process Control | Medical Instrumentation |
|
Use Scenario: Isolating and scaling 4–20mA loop signals in PLC analog input modules subjected to –40°C to +85°C ambient extremes. IC Role / Device Role / Timing Role: High-accuracy current-to-voltage converter and filter driver in harsh industrial environments. Use Value: Guaranteed operation from –40°C to +125°C, 120dB CMRR suppresses 50/60Hz line noise, and ±4.3mV max offset drift over temperature ensures <0.1% FS error stability. |
Use Scenario: Front-end amplification of EEG/ECG biopotential signals in portable patient monitors requiring FDA-compliant signal fidelity. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance instrumentation amplifier input stage with DC-coupled capability. Use Value: 250nVPP 0.1–10Hz noise meets IEC 60601-2-27 low-frequency noise limits; no phase reversal prevents dangerous output transients during electrode contact loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision JFET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA140AIDBVR | Lower voltage noise (2.2nV/√Hz), higher GBW (11MHz), but higher quiescent current (1.8mA vs 1.8mA typ - similar), and narrower supply range (±2.25V to ±18V same). | Preferred for ultra-low-noise, high-speed applications (e.g., audio preamps); less suitable for battery life–critical designs due to higher current noise (0.6fA/√Hz vs 0.8fA/√Hz) and tighter layout sensitivity. | Select OPA140AIDBVR when voltage noise dominates system budget and supply current is secondary; verify stability with capacitive loads as phase margin is reduced vs OPA141AIDGKR. |
| OPA209AIDGKR | Higher voltage noise (4.5nV/√Hz), lower input bias current (0.1pA typ), wider supply range (+4.5V to +36V same), but no phase reversal protection and lower CMRR (114dB min). | Better for femtoamp-level current measurement (e.g., ion-selective electrodes); unsuitable where input overdrive is possible or high CMRR is mandatory (e.g., 4–20mA receivers). | Choose OPA209AIDGKR only when sub-picoamp bias current is essential and system layout guarantees strict input voltage compliance; avoid in uncontrolled industrial interfaces. |
Compared with OPA141AIDGKR, OPA140AIDBVR offers superior voltage noise but demands more careful stability management, while OPA209AIDGKR provides ultra-low bias current at the expense of robustness against common-mode overvoltage and reduced noise rejection - making OPA141AIDGKR the balanced choice for general-purpose high-precision, high-reliability analog signal chains.
Availability
OPA141AIDGKR is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial process control, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA141AIDGKR 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 heritage in precision op amp design and manufacturing.
The OPA141AIDGKR belongs to TI's precision JFET-input op amp product line, engineered specifically for high-impedance, low-noise, wide-temperature industrial and medical signal conditioning where reliability and parametric consistency are non-negotiable.
FAQ
What is the maximum operating temperature range for the OPA141AIDGKR?
The OPA141AIDGKR is fully specified from –40°C to +125°C for all key parameters including offset voltage drift, CMRR, and open-loop gain. Its absolute maximum junction temperature is +150°C, and it incorporates thermal shutdown that activates at approximately +180°C to prevent permanent damage during overload conditions.
Does the OPA141AIDGKR support single-supply operation?
Yes, the OPA141AIDGKR operates from a single supply of +4.5V to +36V. Its input common-mode range extends to V– (including ground in single-supply setups), and its rail-to-rail output swings within 0.35V of both supply rails at 2kΩ load - enabling direct interfacing with 3.3V or 5V ADCs without level-shifting circuitry.
How does the OPA141AIDGKR handle input overvoltage conditions?
The OPA141AIDGKR includes internal phase-reversal protection, ensuring the output saturates predictably at the appropriate rail instead of inverting when inputs exceed the common-mode range. Input terminals are diode-clamped to the supply rails, and signals exceeding (V–) –0.5V or (V+) +0.5V must be current-limited to ≤10mA to prevent damage.
Can the OPA141AIDGKR drive capacitive loads directly?
The OPA141AIDGKR is not optimized for direct heavy capacitive loading. For loads >100pF, TI recommends isolating the output with a series resistor (e.g., 50Ω) to maintain phase margin and prevent peaking or oscillation. Figure 19 and Figure 20 in the SBOS510B datasheet quantify overshoot vs capacitive load for various ROUT values.
What is the significance of the 'DGKR' suffix in OPA141AIDGKR?
The 'DGKR' suffix identifies the package type and reel specification: DGK = 8-pin MSOP package with exposed thermal pad, and R = 1,000-unit tape-and-reel packaging. This matches the official TI ordering code OPA141AIDGKR, confirming it is the standard production-grade variant qualified for industrial temperature operation.
OPA141AIDGKR 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:
- 1
- 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
- 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
OPA141AIDGKR FAQ
1.How can I place an order for OPA141AIDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA141AIDGKR 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 OPA141AIDGKR reliable?
The price and inventory of OPA141AIDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA141AIDGKR is usually 5 days.
3.What payment methods are accepted for OPA141AIDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA141AIDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA141AIDGKR?
OPA141AIDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA141AIDGKR 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 OPA141AIDGKR?
For technical support, including OPA141AIDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA141AIDGKR requirements.
6.How does Aetrix verify that OPA141AIDGKR is sourced from the original manufacturer or authorized distributors?
All OPA141AIDGKR 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 OPA141AIDGKR meets industry standards.
7.What is the process for return or replacement of OPA141AIDGKR?
All OPA141AIDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA141AIDGKR, 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 OPA141AIDGKR part is unused and in its original packaging.
Return procedure for OPA141AIDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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