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Texas Instruments OPA991TIDCKR
- Part No.:
- OPA991TIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA991TIDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,489
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Product details
Overview
OPA991TIDCKR from Texas Instruments is a single-channel, 40-V rail-to-rail input/output operational amplifier optimized for high-voltage industrial signal conditioning. It delivers ±125 µV offset voltage, 4.5 MHz gain-bandwidth, 21 V/µs slew rate, and 10.8 nV/√Hz noise at 1 kHz - enabling precision low-noise amplification in multiplexed data acquisition and high-side current sensing.
For engineers reviewing the OPA991TIDCKR datasheet, OPA991TIDCKR pinout, OPA991TIDCKR application, or OPA991TIDCKR equivalent, this page provides verified technical context, package-specific pin mapping (SC70-5), real-world application constraints, and validated alternative options for high-voltage op amp selection.
Technical Context
The OPA991TIDCKR implements a precision bipolar-input architecture with differential and common-mode input voltage range extending to both supply rails, supporting MUX-friendly operation and open-loop comparator use. Its internal EMI/RFI filtering on input and supply pins ensures robustness in noisy industrial environments.
It features a shutdown pin (SHDN) with logic-level thresholds referenced to V– (VIL ≤ V– + 0.2 V, VIH ≥ V– + 1.1 V), enabling low-power sleep mode with 30 µA quiescent current per amplifier. Thermal performance is characterized for SC70 packaging with RθJA = 202.6 °C/W and ψJB = 47.8 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 40 V (±1.35 V to ±20 V): supports wide-input industrial rails and battery-powered systems without level-shifting. |
| Input Offset Voltage | ±125 µV (typ): enables accurate DC-coupled amplification in sensor front-ends and reference buffers with minimal calibration. |
| Gain-Bandwidth Product | 4.5 MHz: sufficient for driving SAR ADCs (e.g., ADS8860) and closed-loop audio preamplifiers up to ~100 kHz. |
| Slew Rate | 21 V/µs: allows full-scale 10 V step response in ≤2.5 µs (0.01% settling), critical for fast transient capture in test equipment. |
| Capacitive Load Drive | 1 nF: permits direct connection to ADC input capacitors or long PCB traces without external isolation resistors. |
| EMI Rejection | Integrated EMI/RFI filters on inputs and supplies: reduces susceptibility to 30–1000 MHz RF interference in PLC and motor control enclosures. |
| Shutdown Current | 30 µA (max): enables power-gating in multi-channel systems where idle channel current must be minimized. |
Pinout & Package
OPA991TIDCKR is packaged in a 5-pin SC70 (DCK) body measuring 2.00 mm × 1.25 mm, optimized for space-constrained industrial modules and portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output | Amplifier output node; capable of ±75 mA short-circuit current and rail-to-rail swing within 5 mV of supply rails (no load, 40 V). |
| 2 - V– | Negative Supply | Lowest potential supply terminal; thermal pad (if present in other variants) is not used in DCK package. |
| 3 - IN+ | Noninverting Input | Differential input with rail-to-rail common-mode range; accepts signals from V– – 0.1 V to V+ + 0.1 V. |
| 4 - IN– | Inverting Input | Differential input with identical rail-to-rail CMVR; supports MUX switching without phase reversal or latch-up. |
| 5 - V+ | Positive Supply | Highest potential supply terminal; supplies bias for internal ESD protection diodes and EMI filters. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Input common-mode and output swing extend to both supply rails - eliminates need for level-shifting in single-supply 24 V systems. |
| MUX-friendly inputs | Operates linearly with differential inputs up to supply rails and functions reliably as an open-loop comparator - simplifies shared-sensor multiplexing. |
| Low 1/f noise | 1.8 µVPP (0.1–10 Hz): minimizes drift-induced errors in thermocouple and bridge sensor amplification over time. |
| High CMRR | 130 dB (typ, 40 V): rejects common-mode noise from motor drives or switching power supplies in high-side current sensing. |
| Robust EMI immunity | On-chip EMI/RFI filters reduce sensitivity to GSM, Wi-Fi, and PWM noise - validated per IEC 61000-4-3 radiated immunity testing. |
Applications
| Low-Power Audio Preamp | Multiplexed Data Acquisition |
|---|---|
Use Scenario: Amplifying microphone or piezoelectric sensor outputs in battery-powered portable test equipment with 3.3 V or 5 V supply. IC Role / Device Role / Timing Role: Single-ended to differential conversion and gain staging prior to sigma-delta ADC sampling. Use Value: 10.8 nV/√Hz noise and 560 µA quiescent current enable >100 dB SNR and >100-hour runtime on coin-cell batteries. |
Use Scenario: Buffering and conditioning analog inputs from 8-channel analog multiplexer (e.g., MUX509) feeding SAR ADC (e.g., ADS8860). IC Role / Device Role / Timing Role: Anti-aliasing filter driver and reference buffer with rail-to-rail input compatibility across ±10 V sensor ranges. Use Value: 4.5 MHz GBW and 21 V/µs slew rate ensure <2.5 µs settling to 0.01%, preventing crosstalk-induced measurement error during channel switching. |
| SAR ADC Reference Buffer | High-Side Current Sensing |
Use Scenario: Driving REF3140 4.096 V reference into 10 µF decoupling capacitor for 16-bit SAR ADCs in programmable logic controllers. IC Role / Device Role / Timing Role: Low-output-impedance voltage follower with high capacitive load drive capability. Use Value: Stable operation into 1 nF loads eliminates need for isolation resistors, preserving reference accuracy and reducing BOM count. |
Use Scenario: Amplifying shunt voltage in 24 V industrial motor control with common-mode voltage up to 24 V and fault detection down to 10 mV. IC Role / Device Role / Timing Role: High-common-mode differential amplifier with input range extending to V+ (24 V) and V– (0 V). Use Value: ±125 µV offset and 130 dB CMRR enable ±0.1% current measurement accuracy despite 24 V CMV and 120 dB PWM noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA192IDBVR | Lower noise (5.5 nV/√Hz), higher GBW (10 MHz), but no shutdown pin and 36 V max supply. | Better for high-speed, ultra-low-noise audio or precision DAC output buffering where shutdown is unnecessary. | Choose OPA192IDBVR when noise floor and bandwidth outweigh shutdown requirement and 40 V operation is not needed. |
| AD8676ARMZ | Lower offset (±10 µV), lower drift (±0.2 µV/°C), but only 36 V supply, no rail-to-rail output, and no shutdown. | Preferred for metrology-grade DC amplification where sub-µV drift dominates over dynamic performance. | Choose AD8676ARMZ when ultra-stable DC precision is mandatory and system supply stays below 36 V. |
Compared with OPA192IDBVR and AD8676ARMZ, the OPA991TIDCKR uniquely combines 40 V operation, integrated shutdown, rail-to-rail I/O, and robust EMI filtering - making it the only option among the three qualified for high-voltage industrial MUX-based DAQ with power-gating requirements.
Availability
OPA991TIDCKR is available at Aetrix Electronics and suitable for high-voltage industrial signal conditioning, multiplexed data acquisition, and precision current sensing requiring stable component supply across extended temperature ranges (–40°C to 125°C).
Supply support for OPA991TIDCKR 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 op amps and high-reliability industrial ICs.
The OPAx991 product line was designed specifically for high-voltage industrial applications demanding rail-to-rail operation, low drift, and EMI-hardened performance - including PLCs, motor drives, and test equipment.
FAQ
What is the maximum supply voltage for OPA991TIDCKR?
The OPA991TIDCKR supports a maximum supply voltage of 40 V (single-supply) or ±20 V (dual-supply), with absolute maximum ratings up to 42 V. Operation beyond 40 V risks permanent damage, and recommended conditions specify 2.7 V to 40 V. This 40 V rating makes OPA991TIDCKR suitable for 24 V industrial bus systems with margin for transients.
Does OPA991TIDCKR include a shutdown function?
Yes, OPA991TIDCKR includes a dedicated shutdown pin (SHDN) that disables the amplifier when driven high relative to V–. Valid logic high is ≥ V– + 1.1 V, and valid logic low is ≤ V– + 0.2 V. In shutdown, quiescent current drops to 30 µA per amplifier, and output impedance rises to 320 MΩ || 2 pF - ensuring minimal loading of downstream circuitry.
What package type is used for OPA991TIDCKR?
OPA991TIDCKR is supplied in a 5-pin SC70 package (DCK), with nominal dimensions of 2.00 mm × 1.25 mm. This ultra-small outline package is optimized for space-constrained applications such as portable instrumentation and dense industrial modules, and differs from the SOT-23 variants (DBV/DRL) also offered in the OPA991 family.
Can OPA991TIDCKR drive large capacitive loads?
Yes, OPA991TIDCKR is specified to drive up to 1000 pF (1 nF) capacitive loads stably without external compensation. This capability enables direct connection to ADC input capacitors, long PCB traces, or bulk decoupling caps - eliminating series isolation resistors that degrade signal integrity and increase component count in designs using OPA991TIDCKR.
Is OPA991TIDCKR suitable for high-EMI environments like motor drives?
Yes, OPA991TIDCKR integrates EMI/RFI filters on both input and supply pins, providing robust immunity against radiated RF energy in the 30–1000 MHz band. This design feature is explicitly validated in TI's characterization and makes OPA991TIDCKR appropriate for placement near motor drivers, inverters, and switching power supplies where unfiltered op amps would exhibit output perturbation or latch-up.
OPA991TIDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 21V/µs
- Gain Bandwidth Product:
- 4.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 pA
- Voltage - Input Offset:
- 125 µV
- Current - Supply:
- 560µA
- Current - Output / Channel:
- 75 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
OPA991TIDCKR FAQ
1.How can I place an order for OPA991TIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA991TIDCKR 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 OPA991TIDCKR reliable?
The price and inventory of OPA991TIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA991TIDCKR is usually 5 days.
3.What payment methods are accepted for OPA991TIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA991TIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA991TIDCKR?
OPA991TIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA991TIDCKR 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 OPA991TIDCKR?
For technical support, including OPA991TIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA991TIDCKR requirements.
6.How does Aetrix verify that OPA991TIDCKR is sourced from the original manufacturer or authorized distributors?
All OPA991TIDCKR 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 OPA991TIDCKR meets industry standards.
7.What is the process for return or replacement of OPA991TIDCKR?
All OPA991TIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA991TIDCKR, 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 OPA991TIDCKR part is unused and in its original packaging.
Return procedure for OPA991TIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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