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Texas Instruments OPA379AIDCKTG4
- Part No.:
- OPA379AIDCKTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA379AIDCKTG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,061
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Product details
Overview
OPA379AIDCKTG4 from Texas Instruments is a single-channel, rail-to-rail input/output micropower operational amplifier optimized for ultra-low-power battery-operated systems. It delivers 90kHz gain-bandwidth, 2.9µA quiescent current, 1.5mV max offset voltage, and operates from 1.8V to 5.5V supply - enabling precision signal conditioning in portable medical sensors and handheld test equipment.
For engineers reviewing the OPA379AIDCKTG4 datasheet, OPA379AIDCKTG4 pinout, OPA379AIDCKTG4 application, or OPA379AIDCKTG4 equivalent, key selection criteria include its SC70-5 package footprint, –40°C to +125°C operating range, 2.8µVPP (0.1Hz–10Hz) noise performance, and verified rail-to-rail I/O swing within 10mV of rails at 25kΩ load.
Technical Context
The OPA379AIDCKTG4 employs a complementary differential input stage to achieve rail-to-rail common-mode input range extending 100mV beyond both supply rails, with CMRR ≥90dB over VCM = (V–) to (V+) – 1V. Its open-loop gain exceeds 100dB and PSRR remains ≤10µV/V at 25°C, supporting stable DC-coupled sensing in low-voltage systems.
Designed for microsize PCB layouts, it integrates low-input-bias-current (±5pA typ) and low-noise (80nV/√Hz at 1kHz) characteristics while maintaining 0.03V/µs slew rate and 25µs overload recovery - balancing bandwidth, power, and precision for high-impedance sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct operation from single-cell Li-ion or two-cell alkaline batteries without regulation. |
| Quiescent Current | 2.9µA (typ), 5.5µA (max) - supports >1-year battery life in always-on wearable health monitors. |
| Gain Bandwidth Product | 90kHz - sufficient for ECG front-end amplification and thermistor signal conditioning up to ~10kHz. |
| Input Offset Voltage | 1.5mV (max) - ensures <0.3% error in 0.5V full-scale sensor outputs without trimming. |
| Input Voltage Noise | 2.8µVPP (0.1Hz–10Hz) - critical for low-frequency biosignal acquisition with minimal baseline drift. |
| Rail-to-Rail I/O | Output swings within 10mV of rails at 25kΩ - maximizes dynamic range in 3.3V or lower ADC reference systems. |
| Operating Temperature | –40°C to +125°C - qualified for industrial-grade portable instrumentation and automotive cabin sensors. |
Pinout & Package
OPA379AIDCKTG4 is housed in a 5-pin SC70 package (DCK), measuring 2.0mm × 2.1mm × 0.9mm, with moisture sensitivity level (MSL) 2 and lead finish NiPdAu. The package supports high-density placement and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail buffered signal; capable of driving 25kΩ loads with <10mV headroom. |
| 2 (IN–) | Inverting input | Differential node accepting feedback or sensor return; input bias current ≤50pA ensures minimal error in high-Z networks. |
| 3 (IN+) | Non-inverting input | High-impedance sensor interface node; common-mode range extends 100mV beyond V– and V+ rails. |
| 4 (V–) | Negative supply | Ground reference for single-supply operation or negative rail in dual-supply configurations. |
| 5 (V+) | Positive supply | Accepts 1.8V–5.5V; PSRR ≤10µV/V minimizes supply ripple coupling into output. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full utilization of 1.8V–5.5V supply range, preserving ADC resolution without level-shifting circuitry. |
| 2.9µA quiescent current | Reduces system standby power by >50% versus comparable 5µA op amps, extending battery runtime in IoT endpoints. |
| 2.8µVPP low-frequency noise | Minimizes baseline wander in ECG and pulse oximetry front ends where sub-Hz signals dominate. |
| 1.5mV max offset voltage | Eliminates need for external nulling in factory-calibrated portable gas meters and temperature transmitters. |
| SC70-5 package | Reduces board area by 60% vs SOIC-8, enabling miniaturized PCBs in hearing aids and implantable device modules. |
Applications
| Battery-Powered Medical Sensors | Portable Gas Detection |
|---|---|
|
Use Scenario: Amplifying low-amplitude signals from electrochemical gas sensors in handheld leak detectors. IC Role / Device Role / Timing Role: Precision transimpedance amplifier converting picoamp-level sensor current to voltage with rail-to-rail output swing. Use Value: 2.9µA IQ enables >2-year operation on CR2032 coin cell; 90kHz GBW supports fast response to gas concentration changes. |
Use Scenario: Signal conditioning for catalytic bead or NDIR-based combustible gas sensors in field service tools. IC Role / Device Role / Timing Role: Low-drift, low-noise buffer isolating sensor bridge output before 16-bit ADC sampling. Use Value: 1.5mV max VOS ensures <0.5% full-scale error across –20°C to +60°C ambient; SC70-5 eases integration into compact enclosures. |
| Handheld Test Equipment | Low-Power Industrial Monitoring |
|
Use Scenario: Input stage of portable multimeter or oscilloscope probe amplifier requiring wide common-mode range. IC Role / Device Role / Timing Role: Rail-to-rail input buffer accepting ±0.5V to +5V signals while rejecting supply noise via 100dB PSRR. Use Value: 2.8µVPP noise preserves measurement fidelity below 10Hz; 1.8V min supply allows operation from USB-powered battery packs. |
Use Scenario: Sensor interface in wireless vibration monitors mounted on rotating machinery in remote locations. IC Role / Device Role / Timing Role: High-impedance amplifier for piezoelectric accelerometer outputs, driving SAR ADC with minimal power overhead. Use Value: 5pA input bias current prevents signal loss across MΩ-range sensor cabling; –40°C to +125°C rating ensures reliability in uncontrolled environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2241IDBVR | Higher 0.6mV max VOS but wider 2.5V–12V supply range; 5.5kHz GBW limits AC response. | Better suited for higher-voltage industrial analog front ends where bandwidth <10kHz suffices. | Select TLV2241IDBVR when supply exceeds 5.5V or when tighter VOS tolerance is required over extended temperature. |
| OPA347UA | 20µA IQ (7× higher), 350kHz GBW, 2.3V–5.5V supply; same SC70-5 package and pinout. | Preferred for battery-powered systems needing faster settling or driving capacitive loads >100pF. | Choose OPA347UA when bandwidth >90kHz is mandatory and 2.9µA IQ is not critical to system lifetime. |
Compared with TLV2241IDBVR and OPA347UA, the OPA379AIDCKTG4 uniquely balances ultra-low quiescent current (2.9µA), rail-to-rail I/O, and 90kHz bandwidth in SC70-5 - making it optimal for space-constrained, multi-year battery applications demanding precision at sub-10kHz frequencies.
Availability
OPA379AIDCKTG4 is available at Aetrix Electronics and suitable for battery-powered medical sensors, portable gas detection, and handheld test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA379AIDCKTG4 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 amp design and low-power signal chain solutions.
The OPA379 family was engineered specifically for micropower, rail-to-rail precision amplification in battery-constrained applications - targeting portable instrumentation, medical wearables, and energy-harvesting sensor nodes.
FAQ
What is the maximum operating temperature range for the OPA379AIDCKTG4?
The OPA379AIDCKTG4 is fully specified and tested from –40°C to +125°C, meeting industrial and extended-temperature requirements for deployment in harsh environments such as automotive cabins, outdoor monitoring devices, and medical diagnostic tools where thermal stability is critical. This range is validated per TI's production test flow and documented in the SBOS347D datasheet.
Does the OPA379AIDCKTG4 support true rail-to-rail input and output operation?
Yes, the OPA379AIDCKTG4 supports rail-to-rail input with common-mode voltage range extending 100mV beyond both supply rails (V– – 0.1V to V+ + 0.1V), and rail-to-rail output with swing within 10mV of each rail under 25kΩ load. These capabilities are measured and guaranteed across the full –40°C to +125°C temperature range per electrical characteristics tables in SBOS347D.
What is the typical quiescent current of the OPA379AIDCKTG4 at 1.8V supply?
At 1.8V supply and TA = +25°C, the OPA379AIDCKTG4 draws 2.9µA typical quiescent current, rising to 5.5µA maximum across temperature and process variation. This value is confirmed in the Electrical Characteristics table (page 4, SBOS347D) and enables multi-year operation in always-on sensor nodes powered by primary lithium cells.
Can the OPA379AIDCKTG4 drive capacitive loads, and what is the recommended compensation?
The OPA379AIDCKTG4 can drive up to 30pF capacitive load stably in unity-gain configuration. For loads exceeding 30pF, TI recommends adding a 10Ω–20Ω series resistor (RS) between output and load to suppress ringing - a method validated in Figure 21 of SBOS347D. This preserves DC accuracy while improving transient response without requiring external compensation capacitors.
Is the OPA379AIDCKTG4 pin-compatible with other members of the OPA379 family?
No - the OPA379AIDCKTG4 uses the 5-pin SC70 (DCK) package, while OPA2379 and OPA4379 variants use 8-pin SOT-23 or 14-pin TSSOP packages. Even within the OPA379 family, SC70-5 (OPA379AIDCKTG4), SOT-23-5 (OPA379AIDBVT), and SO-8 (OPA379AID) have different pinouts and footprints; PCB layout must be matched to the specific package variant ordered.
OPA379AIDCKTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.03V/µs
- Gain Bandwidth Product:
- 90 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 2.9µA
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
OPA379AIDCKTG4 FAQ
1.How can I place an order for OPA379AIDCKTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA379AIDCKTG4 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 OPA379AIDCKTG4 reliable?
The price and inventory of OPA379AIDCKTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA379AIDCKTG4 is usually 5 days.
3.What payment methods are accepted for OPA379AIDCKTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA379AIDCKTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA379AIDCKTG4?
OPA379AIDCKTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA379AIDCKTG4 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 OPA379AIDCKTG4?
For technical support, including OPA379AIDCKTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA379AIDCKTG4 requirements.
6.How does Aetrix verify that OPA379AIDCKTG4 is sourced from the original manufacturer or authorized distributors?
All OPA379AIDCKTG4 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 OPA379AIDCKTG4 meets industry standards.
7.What is the process for return or replacement of OPA379AIDCKTG4?
All OPA379AIDCKTG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA379AIDCKTG4, 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 OPA379AIDCKTG4 part is unused and in its original packaging.
Return procedure for OPA379AIDCKTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA379AIDCKTG4 Tags
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