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Texas Instruments OPA379AIDBVTG4
- Part No.:
- OPA379AIDBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA379AIDBVTG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,257
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Product details
Overview
OPA379AIDBVTG4 from Texas Instruments is a single-channel, rail-to-rail input/output micropower operational amplifier designed for ultra-low-power signal conditioning in battery-powered 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 sensing in portable medical monitors and handheld test equipment.
For engineers reviewing the OPA379AIDBVTG4 datasheet, OPA379AIDBVTG4 pinout, OPA379AIDBVTG4 application, or OPA379AIDBVTG4 equivalent, key selection criteria include its 2.8µVPP 0.1Hz–10Hz noise, 5pA input bias current, rail-to-rail I/O swing within 10mV of rails (RL = 25kΩ), and guaranteed operation across –40°C to +125°C.
Technical Context
The OPA379AIDBVTG4 employs a complementary differential input stage to achieve rail-to-rail common-mode input range extending 100mV beyond both supply rails, with CMRR ≥100dB at 25°C. Its low-noise architecture combines 80nV/√Hz wideband density and 2.8µVPP integrated low-frequency noise, optimized for DC-coupled sensor interfaces where power and precision coexist.
It features internal unity-gain stable compensation, supports capacitive loads up to 30pF without oscillation, and maintains 120dB open-loop gain (AOL) at 25°C with PSRR and CMRR both ≥100dB - making it suitable for high-impedance, low-supply applications where supply rejection and common-mode immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct operation from single-cell Li-ion, alkaline, or coin-cell batteries without regulation. |
| Quiescent Current | 2.9µA typ / 5.5µA max - allows multi-year battery life in always-on wearable sensors. |
| Gain-Bandwidth Product | 90kHz - sufficient for ECG front-ends, thermistor amplification, and slow-scan ADC drivers. |
| Input Offset Voltage | 1.5mV max - ensures ≤0.03% error in 50mV full-scale bridge sensor outputs. |
| Input Bias Current | ±5pA typ - minimizes voltage error across >10MΩ source impedances (e.g., pH electrodes). |
| Output Swing | Within 10mV of rails (RL = 25kΩ) - preserves dynamic range in low-voltage, single-supply data acquisition. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin sensors and industrial field transmitters. |
Pinout & Package
SOT-23-5 package (DBV) with 5 terminals; compact 2.9mm × 1.6mm footprint ideal for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; drives 25kΩ load to within 10mV of V+ or V−. |
| 2 (IN−) | Inverting input | Differential node accepting feedback or signal; 5pA bias current minimizes resistor-induced offset. |
| 3 (IN+) | Non-inverting input | High-impedance sensor interface node; common-mode range extends 100mV beyond supply 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; internal regulation not required; PSRR ≥100dB rejects supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full utilization of 1.8V supply headroom - no level-shifting needed for ADC interfacing. |
| 2.8µVPP 0.1Hz–10Hz noise | Supports sub-µV-level DC measurements in EEG or strain-gauge bridges without external filtering. |
| 5pA input bias current | Permits use of >10MΩ gain-setting resistors without significant offset drift or thermal noise penalty. |
| 100dB CMRR & PSRR | Maintains accuracy in noisy environments (e.g., motor-driven portable tools) with minimal layout sensitivity. |
| –40°C to +125°C operation | Eliminates derating or external heating/cooling in automotive under-hood or industrial ambient deployments. |
Applications
| Battery Voltage Monitoring | Portable Medical Sensor Front-End |
|---|---|
Use Scenario: Real-time monitoring of lithium coin-cell or alkaline battery voltage in wireless glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Precision buffer and comparator reference amplifier driving low-power ADCs with <1mV absolute error. Use Value: 2.9µA IQ extends battery life beyond 5 years in sleep-mode devices; rail-to-rail output ensures full ADC code utilization at 1.8V supply. | Use Scenario: Amplifying microvolt-level signals from dry-electrode ECG or skin-temperature thermistors in wearables. IC Role / Device Role / Timing Role: Low-noise, DC-stable gain stage with 5pA input bias to avoid loading high-impedance biopotential sources. Use Value: 2.8µVPP low-frequency noise prevents baseline wander; 90kHz GBW supports 100Hz bandwidth without phase lag. |
| Handheld Test Equipment Signal Conditioning | Low-Power Industrial Transmitter Interface |
Use Scenario: Input buffering and scaling in pocket-sized multimeters or insulation testers operating from AA batteries. IC Role / Device Role / Timing Role: High-input-impedance voltage follower isolating DMM input circuitry from probe capacitance and leakage. Use Value: 10¹³Ω input impedance minimizes measurement error on high-Z sources; 1.5mV VOS ensures <0.1% reading error at 1.5V range. | Use Scenario: Conditioning 4–20mA loop sensor outputs or RTD bridge voltages in battery-powered remote telemetry nodes. IC Role / Device Role / Timing Role: Rail-to-rail I/O amplifier providing precise gain/level-shift before SAR ADC sampling. Use Value: Operation down to 1.8V allows direct connection to buck-boost regulators; 125°C rating supports deployment near heat-generating RF modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2241IDBVR | Higher IQ (7µA), lower GBW (5.5kHz), 0.6mV VOS | Better DC precision but insufficient bandwidth for >10Hz sensor signals | Choose TLV2241IDBVR only when ultra-low offset dominates over speed and power. |
| OPA347UA | Higher IQ (20µA), higher GBW (350kHz), 2mV VOS | Supports faster settling but consumes 7× more current than OPA379AIDBVTG4 | Choose OPA347UA only when system requires >100kHz closed-loop bandwidth with moderate power budget. |
Compared with TLV2241IDBVR and OPA347UA, the OPA379AIDBVTG4 uniquely balances sub-3µA quiescent current, 90kHz bandwidth, and rail-to-rail I/O in a 5-pin SOT-23 - making it optimal for battery lifetime-critical, medium-bandwidth analog front-ends where every nanoamp counts.
Availability
OPA379AIDBVTG4 is available at Aetrix Electronics and suitable for battery voltage monitoring, portable medical sensor front-ends, handheld test equipment signal conditioning, and low-power industrial transmitter interfaces requiring stable component supply across extended temperature ranges.
Supply support for OPA379AIDBVTG4 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The OPA379 family was engineered specifically for micropower, low-voltage, precision signal conditioning - targeting battery-operated instrumentation where rail-to-rail operation, nanoscale bias current, and ultra-low noise must coexist at sub-6µA total supply current.
FAQ
What is the maximum capacitive load the OPA379AIDBVTG4 can drive without instability?
The OPA379AIDBVTG4 is stable with capacitive loads up to 30pF in unity-gain configuration, as verified in the Typical Characteristics (Figure 17). For loads exceeding 30pF, a 10Ω–20Ω series resistor (RS) between output and load restores stability while preserving DC accuracy - a technique validated in Figure 21 of the OPA379AIDBVTG4 datasheet.
Does the OPA379AIDBVTG4 support true rail-to-rail input common-mode range?
Yes, the OPA379AIDBVTG4 achieves rail-to-rail input operation: its common-mode voltage range extends from (V−) − 0.1V to (V+) + 0.1V at 25°C. This is enabled by a complementary input stage, allowing direct interfacing with sensors whose output swings near supply rails - a capability confirmed in the Electrical Characteristics table (VCM specification).
What is the typical quiescent current of the OPA379AIDBVTG4 at 1.8V supply?
The OPA379AIDBVTG4 draws 2.9µA typical quiescent current at VS = 1.8V, as specified in the Electrical Characteristics table under "Quiescent Current per Amplifier" (IQ). This value is measured at TA = 25°C with IO = 0 and remains ≤10µA across the full –40°C to +125°C operating range - ensuring predictable low-power behavior in cold or hot environments.
Can the OPA379AIDBVTG4 be used in a single-supply 1.8V system with ground-referenced input signals?
Yes, the OPA379AIDBVTG4 supports true single-supply operation at 1.8V. Its input common-mode range includes ground (V−), and its output swings to within 10mV of V− - enabling direct amplification of ground-referenced signals like thermistor dividers or bridge outputs without level-shifting circuitry, as demonstrated in Figure 25 (Unipolar Signal Chain Configuration).
Is the OPA379AIDBVTG4 pin-compatible with other members of the OPA379 family?
No - the OPA379AIDBVTG4 uses a 5-pin SOT-23 (DBV) package, while the dual OPA2379 and quad OPA4379 use 8-pin SOT-23 (DCN) and 14-pin TSSOP (PW) packages respectively. Pinouts differ across variants; the OPA379AIDBVTG4 pin mapping (OUT, IN−, IN+, V−, V+) is unique to its 5-pin configuration and not interchangeable with other family members.
OPA379AIDBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- SOT-23-5
OPA379AIDBVTG4 FAQ
1.How can I place an order for OPA379AIDBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA379AIDBVTG4 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 OPA379AIDBVTG4 reliable?
The price and inventory of OPA379AIDBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA379AIDBVTG4 is usually 5 days.
3.What payment methods are accepted for OPA379AIDBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA379AIDBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA379AIDBVTG4?
OPA379AIDBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA379AIDBVTG4 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 OPA379AIDBVTG4?
For technical support, including OPA379AIDBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA379AIDBVTG4 requirements.
6.How does Aetrix verify that OPA379AIDBVTG4 is sourced from the original manufacturer or authorized distributors?
All OPA379AIDBVTG4 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 OPA379AIDBVTG4 meets industry standards.
7.What is the process for return or replacement of OPA379AIDBVTG4?
All OPA379AIDBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA379AIDBVTG4, 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 OPA379AIDBVTG4 part is unused and in its original packaging.
Return procedure for OPA379AIDBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA379AIDBVTG4 Tags
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