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Texas Instruments OPA191IDBVT
- Part No.:
- OPA191IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA191IDBVT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:340
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Product details
Overview
OPA191IDBVT from Texas Instruments is a single-channel, 36-V, precision CMOS operational amplifier with rail-to-rail input/output, ±5 µV offset voltage, ±5 pA input bias current, and 2.5-MHz gain-bandwidth product. It operates from ±2.25 V to ±18 V (4.5 V to 36 V), delivers ±65 mA output current, and is optimized for high-accuracy signal conditioning in industrial data acquisition and sensor interfaces.
For engineers reviewing the OPA191IDBVT datasheet, OPA191IDBVT pinout, OPA191IDBVT application, or OPA191IDBVT equivalent, key selection criteria include ultra-low offset drift (±0.1 µV/°C), EMI/RFI-filtered inputs, differential input voltage range extending to supply rails, and stable 1-nF capacitive load drive capability in the 5-pin SOT-23 package.
Technical Context
The OPA191IDBVT employs e-trim™ technology for outstanding DC precision, achieving ±5 µV typical input offset voltage and ±0.1 µV/°C drift over temperature. Its CMOS input stage enables ultra-low input bias current (±5 pA) and high input impedance (10¹³ Ω common-mode), supporting high-impedance sensor interfacing without signal degradation.
With 5 V/µs slew rate, 2.5-MHz GBW, and rail-to-rail output swing within 15 mV of rails (RL = 10 kΩ), the device maintains fidelity in fast, wide-dynamic-range analog front-ends. Its differential input voltage range extends to the supply rails, enabling direct connection to overvoltage-tolerant multiplexers in high-voltage DAQ systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±2.25 V to ±18 V (4.5 V to 36 V): supports dual- and single-supply operation across industrial power rails. |
| Input Offset Voltage | ±5 µV (typ): enables sub-16-bit accuracy in 24-bit DAQ systems without calibration. |
| Input Bias Current | ±5 pA (typ): preserves signal integrity when amplifying outputs from high-impedance sources like piezoresistive sensors. |
| Gain-Bandwidth Product | 2.5 MHz: allows stable unity-gain buffering of signals up to ~200 kHz with <0.1% gain error. |
| Slew Rate | 5 V/µs: supports clean amplification of 1-Vpp signals at 500 kHz without slewing distortion. |
| Capacitive Load Drive | 1 nF: eliminates need for isolation resistors when driving ADC input filters or long traces. |
| Quiescent Current | 140 µA per amplifier: enables low-power operation in battery-backed instrumentation and portable test equipment. |
Pinout & Package
OPA191IDBVT is packaged in a 5-pin SOT-23 (DBV) with 2.90 mm × 1.60 mm body size and thermal pad exposed on bottom for enhanced power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output | Amplified signal output; rail-to-rail swing (within 15 mV of rails, RL = 10 kΩ). |
| 2 - –IN | Inverting Input | Differential input node; accepts signals down to V– – 0.1 V and up to V+ + 0.1 V. |
| 3 - +IN | Noninverting Input | Differential input node; same common-mode range as –IN; enables precision buffer or difference amplifier configurations. |
| 4 - V– | Negative Supply | Lowest potential supply rail; must be connected to system ground or negative rail. |
| 5 - V+ | Positive Supply | Highest potential supply rail; supports up to +36 V in single-supply mode. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of supply range in single-supply systems; supports direct interface to 3.3-V or 5-V ADCs without level-shifting. |
| e-trim™ technology | Delivers factory-trimmed ±5 µV offset and ±0.1 µV/°C drift-no external calibration required for precision measurement paths. |
| EMI/RFI filtered inputs | Reduces sensitivity to electromagnetic interference in noisy industrial environments (e.g., motor drives, PLC cabinets). |
| Differential input voltage range to supply rail | Allows safe operation with input voltages equal to V+ or V–, eliminating risk of phase reversal in overvoltage conditions. |
| High capacitive load drive (1 nF) | Stabilizes output when driving anti-aliasing filters or long PCB traces without added series resistance or compensation networks. |
Applications
| Analog Input Module | Mixed I/O Module (AI/AO/DI/DO) |
|---|---|
Use Scenario: High-accuracy voltage/current input conditioning in programmable logic controller (PLC) analog input cards. IC Role / Device Role / Timing Role: Precision signal amplifier and buffer for 4–20 mA transmitters and ±10 V field sensors. Use Value: ±5 µV offset ensures <0.005% reading error over full scale; rail-to-rail output matches 24-bit SAR ADC input range. | Use Scenario: Signal conditioning for multi-function I/O modules handling simultaneous analog inputs, analog outputs, digital inputs, and digital outputs. IC Role / Device Role / Timing Role: Front-end amplifier for isolated analog inputs and reference buffer for DAC output stages. Use Value: 140 µA quiescent current minimizes thermal drift across mixed-signal channels; EMI filtering prevents cross-talk between digital and analog sections. |
| Data Acquisition System | Pressure Transmitter |
Use Scenario: Multiplexed high-voltage DAQ system with >100 dB CMRR and anti-aliasing filtering. IC Role / Device Role / Timing Role: High-impedance buffer and gain stage before multiplexer and ADC, rejecting common-mode noise from long sensor cables. Use Value: 140 dB CMRR and ±5 pA bias current preserve resolution in 24-bit measurements; 1-nF drive capability simplifies RC filter design. | Use Scenario: Signal conditioning for bridge-based pressure sensors in industrial process control and HVAC systems. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end driver with low-noise, low-drift amplification of mV-level bridge outputs. Use Value: 15 nV/√Hz input voltage noise and ±0.1 µV/°C drift ensure stable zero-point and span calibration over –40°C to +125°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA192IDBVT | Lower input bias current (±0.3 pA), higher GBW (10 MHz), higher IQ (1 mA); same package and pinout. | Better for ultra-high-Z sources (e.g., pH electrodes) and higher-speed closed-loop designs; less suitable for battery-powered systems. | Select OPA192IDBVT only if bandwidth >5 MHz or bias current <1 pA is required; otherwise OPA191IDBVT offers superior power/performance trade-off. |
| AD8676ARMZ | Higher offset (±10 µV), higher IQ (2.3 mA), SOIC-8 package; no EMI filtering or rail-to-rail input. | Requires external level-shifting for single-supply use; unsuitable for high-noise industrial enclosures without additional shielding. | Choose AD8676ARMZ only if legacy SOIC footprint compatibility is mandatory and EMI immunity is not critical. |
Compared with OPA192IDBVT and AD8676ARMZ, OPA191IDBVT uniquely balances ultra-low offset drift (±0.1 µV/°C), 140 µA quiescent current, and EMI-hardened inputs in a space-constrained SOT-23 package-making it optimal for cost-sensitive, thermally stable, and electrically noisy industrial DAQ nodes.
Availability
OPA191IDBVT is available at Aetrix Electronics and suitable for analog input modules, pressure transmitters, and data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for OPA191IDBVT 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 amplifiers, data converters, and power management ICs.
The OPAx191 family was designed for high-voltage industrial signal conditioning-specifically targeting applications demanding low drift, low power, and robustness in harsh electrical environments such as factory automation and process control.
FAQ
What is the maximum supply voltage for OPA191IDBVT?
The OPA191IDBVT supports a maximum total supply voltage of ±20 V (or +40 V in single-supply mode). Its recommended operating range is ±2.25 V to ±18 V (4.5 V to 36 V), ensuring reliable performance while maintaining specified offset, bandwidth, and output swing characteristics across temperature.
Does OPA191IDBVT have rail-to-rail input capability?
Yes, OPA191IDBVT features true rail-to-rail input operation: its common-mode input voltage range extends from (V–) – 0.1 V to (V+) + 0.1 V. This allows direct interfacing with sensors or DACs operating near supply rails without external level-shifting circuitry.
Can OPA191IDBVT drive a 1-nF capacitive load stably?
Yes, OPA191IDBVT is explicitly characterized for stable operation with up to 1 nF capacitive load, as confirmed in the datasheet's Typical Characteristics section (Figure 6-32/6-33). No external isolation resistor is required, simplifying anti-aliasing filter design in DAQ front-ends.
What is the input bias current specification for OPA191IDBVT at 125°C?
At TA = –40°C to +125°C, the input bias current for OPA191IDBVT is specified as ±9 nA (max). At room temperature (25°C), it is ±5 pA (typ), reflecting the CMOS input architecture's excellent high-temperature stability relative to JFET or bipolar alternatives.
Is OPA191IDBVT pin-compatible with other members of the OPAx191 family?
No, OPA191IDBVT (5-pin SOT-23) is not pin-compatible with OPA2191 or OPA4191, which use 8-pin SOIC/VSSOP or 14-/16-pin packages. Pin count, layout, and terminal assignments differ fundamentally-PCB redesign is required when substituting channel count or package type.
OPA191IDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 5.5V/µs
- Gain Bandwidth Product:
- 2.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- 140µA
- Current - Output / Channel:
- -
- 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:
- SOT-23-5
OPA191IDBVT FAQ
1.How can I place an order for OPA191IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA191IDBVT 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 OPA191IDBVT reliable?
The price and inventory of OPA191IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA191IDBVT is usually 5 days.
3.What payment methods are accepted for OPA191IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA191IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA191IDBVT?
OPA191IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA191IDBVT 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 OPA191IDBVT?
For technical support, including OPA191IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA191IDBVT requirements.
6.How does Aetrix verify that OPA191IDBVT is sourced from the original manufacturer or authorized distributors?
All OPA191IDBVT 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 OPA191IDBVT meets industry standards.
7.What is the process for return or replacement of OPA191IDBVT?
All OPA191IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with OPA191IDBVT, 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 OPA191IDBVT part is unused and in its original packaging.
Return procedure for OPA191IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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