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Texas Instruments OPA379AIDBVRG4
- Part No.:
- OPA379AIDBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA379AIDBVRG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,324
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Product details
Overview
OPA379AIDBVRG4 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 OPA379AIDBVRG4 datasheet, OPA379AIDBVRG4 pinout, OPA379AIDBVRG4 application, or OPA379AIDBVRG4 equivalent, key selection criteria include its 5-pin SOT-23 package, 2.8µVPP (0.1Hz–10Hz) low-frequency noise, rail-to-rail I/O capability, –40°C to +125°C operating range, and verified performance in battery monitoring and sensor front-end circuits.
Technical Context
The OPA379AIDBVRG4 uses 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 micropower architecture maintains DC precision (AOL = 120dB, PSRR = 2µV/V) while delivering stable unity-gain operation with capacitive loads up to 30pF.
It features low-input-bias-current (±5pA typical) FET-like input circuitry, enabling high-impedance sensor interfacing without significant error. The device's 80nV/√Hz wideband noise and 0.03V/µs slew rate support accurate amplification of low-amplitude, low-frequency signals in energy-constrained applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - supports direct connection to single-cell Li-ion (3.0V), alkaline (1.5V×2), or regulated 3.3V/5V rails without level-shifting. |
| Quiescent Current | 2.9µA typ / 5.5µA max - enables multi-year battery life in always-on wearable sensors and IoT endpoint nodes. |
| Gain-Bandwidth Product | 90kHz - sufficient for anti-aliasing, sensor signal conditioning, and low-speed control loops (e.g., temperature, gas, ECG). |
| Input Offset Voltage | 1.5mV max - ensures ≤0.03% full-scale error in 50mV-range bridge sensor outputs with 100kΩ gain. |
| Input Voltage Noise | 2.8µVPP (0.1Hz–10Hz) - critical for stable DC-coupled measurements in medical instrumentation and precision data loggers. |
| Output Swing | 5mV from rail (RL = 25kΩ) - preserves dynamic range in single-supply systems using rail-to-rail ADCs like ADS1100. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin modules, industrial field transmitters, and outdoor environmental sensors. |
Pinout & Package
SOT-23-5 package (DBV), 5-pin surface-mount, 2.9mm × 1.6mm footprint, thermal resistance θJA = 200°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−) | Inverting Input | Differential node for feedback networks; accepts rail-to-rail common-mode voltages from (V−) − 0.1V to (V+) + 0.1V. |
| 2 (IN+) | Non-Inverting Input | High-impedance sensor interface point; bias current ≤50pA minimizes leakage-induced offset in pH or photodiode circuits. |
| 3 (V−) | Negative Supply Rail | Ground reference for single-supply operation; must be decoupled with 0.1µF ceramic capacitor near pin. |
| 4 (OUT) | Amplifier Output | Capable of driving 25kΩ loads within 5mV of rails; series resistor (10–20Ω) recommended for >30pF capacitive loads. |
| 5 (V+) | Positive Supply Rail | Accepts 1.8V–5.5V; PSRR of 2µV/V ensures minimal supply ripple coupling into output signal. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full utilization of ADC input range in 1.8V–3.3V systems without external level-shifting components. |
| 2.9µA quiescent current | Reduces average power to <10µW at 3.3V, allowing integration into coin-cell-powered devices with >5-year shelf life. |
| 1.5mV max VOS | Eliminates need for system-level calibration in factory-set portable instruments such as blood glucose meters. |
| 2.8µVPP 0.1Hz–10Hz noise | Supports sub-µV resolution in DC-coupled biosignal acquisition where 1/f noise dominates measurement uncertainty. |
| –40°C to +125°C operation | Validates functionality across automotive under-hood, industrial motor control, and aerospace avionics environments. |
Applications
| Battery Voltage Monitoring | Portable Medical Sensor Front-End |
|---|---|
Use Scenario: Real-time tracking of lithium coin-cell or alkaline battery voltage in wireless pulse oximeters and insulin pens. IC Role / Device Role / Timing Role: Precision comparator and buffer in resistive-divider-based threshold detection circuit with REF1112 reference. Use Value: 1.5mV VOS and 2.9µA IQ ensure accurate low-battery alerts without draining reserve capacity during standby. | Use Scenario: Amplifying low-amplitude bio-potential signals (e.g., ECG, EMG) from dry electrodes in fitness wearables. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier gain block with rail-to-rail input to preserve signal integrity at 1.8V supply. Use Value: 2.8µVPP low-frequency noise and ±5pA input bias prevent baseline drift and electrode polarization errors. |
| Handheld Test Equipment Signal Conditioning | Low-Power Industrial Transmitter Interface |
Use Scenario: Signal buffering and filtering in battery-operated multimeters and portable oscilloscope probes. IC Role / Device Role / Timing Role: Unity-gain buffer isolating high-impedance DMM input from downstream ADC and anti-aliasing filter. Use Value: 90kHz GBW and rail-to-rail output swing maintain fidelity for 10kHz sine-wave measurements with <0.1% THD. | Use Scenario: Converting 4–20mA loop current to voltage in smart field sensors deployed in remote oil/gas monitoring stations. IC Role / Device Role / Timing Role: Low-drift, low-power current-sense amplifier with precision shunt interface and 3.3V microcontroller ADC input. Use Value: 100dB CMRR and 20µV/V PSRR reject common-mode noise and supply ripple in electrically noisy industrial settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2241IDBVR | Higher IQ (7µA), lower GBW (5.5kHz), 0.6mV VOS, same SOT-23-5 package | Better DC accuracy but insufficient bandwidth for >1kHz sensor signals; suited for static voltage monitoring only | Select when ultra-low offset dominates over speed and power; avoid for dynamic physiological signals. |
| OPA347UA | Higher IQ (20µA), higher GBW (350kHz), 2mV VOS, SO-8 package | Delivers faster response for transient-rich signals but consumes 7× more current; requires larger PCB area | Choose when system demands >100kHz bandwidth and can accommodate higher power budget and SO-8 layout. |
Compared with TLV2241IDBVR and OPA347UA, the OPA379AIDBVRG4 uniquely balances sub-3µA quiescent current, 90kHz bandwidth, and rail-to-rail I/O in a 5-pin SOT-23 - making it optimal for space- and energy-constrained portable instrumentation where both precision and efficiency are non-negotiable.
Availability
OPA379AIDBVRG4 is available at Aetrix Electronics and suitable for battery-powered instruments, portable medical devices, and handheld test equipment requiring stable component supply across extended product lifecycles.
Supply support for OPA379AIDBVRG4 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 low-power signal chain solutions.
The OPA379 family was engineered specifically for micropower, rail-to-rail precision amplification in battery-critical applications - targeting portable diagnostics, environmental sensing, and energy-harvesting systems.
FAQ
What is the maximum capacitive load the OPA379AIDBVRG4 can drive stably in unity-gain configuration?
The OPA379AIDBVRG4 remains stable with capacitive loads up to 30pF in unity-gain follower mode. For loads exceeding 30pF, TI recommends adding a 10Ω–20Ω series resistor between the output pin and the capacitive load to suppress ringing and overshoot while preserving DC accuracy - as validated in Figure 17 of the SBOS347D datasheet.
Does the OPA379AIDBVRG4 support true rail-to-rail input common-mode range?
Yes, the OPA379AIDBVRG4 supports rail-to-rail input with a common-mode voltage range from (V−) − 0.1V to (V+) + 0.1V. However, CMRR degrades above (V+) − 1V due to input stage transition; for best DC precision, keep VCM within (V−) to (V+) − 1V, as specified in the Electrical Characteristics table.
What is the guaranteed minimum open-loop gain (AOL) for OPA379AIDBVRG4 over temperature?
The OPA379AIDBVRG4 guarantees AOL ≥80dB over the full –40°C to +125°C operating range when loaded with 5kΩ and output swing constrained to 500mV from each rail. At 25°C with 25kΩ load, AOL is 100–120dB - ensuring stable closed-loop gain accuracy in precision sensor interfaces.
Can the OPA379AIDBVRG4 operate from a 1.8V single supply while maintaining rail-to-rail output swing?
Yes, the OPA379AIDBVRG4 fully supports 1.8V single-supply operation with rail-to-rail output swing. At 1.8V and RL = 25kΩ, output swings to within 5mV of both rails - delivering >99% usable dynamic range for 12-bit ADCs like the ADS1100 without external level-shifting circuitry.
Is the OPA379AIDBVRG4 pin-compatible with other members of the OPA379 family?
No - the OPA379AIDBVRG4 (SOT-23-5) has a different pinout than the OPA2379 (SOT-23-8) and OPA4379 (TSSOP-14). Within the single-channel variants, OPA379AIDBVRG4 shares identical pin mapping with OPA379AIDBVR and OPA379AIDBVT, all using the standard SOT-23-5 configuration shown in Figure 1 of SBOS347D.
OPA379AIDBVRG4 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
OPA379AIDBVRG4 FAQ
1.How can I place an order for OPA379AIDBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA379AIDBVRG4 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 OPA379AIDBVRG4 reliable?
The price and inventory of OPA379AIDBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA379AIDBVRG4 is usually 5 days.
3.What payment methods are accepted for OPA379AIDBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA379AIDBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA379AIDBVRG4?
OPA379AIDBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA379AIDBVRG4 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 OPA379AIDBVRG4?
For technical support, including OPA379AIDBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA379AIDBVRG4 requirements.
6.How does Aetrix verify that OPA379AIDBVRG4 is sourced from the original manufacturer or authorized distributors?
All OPA379AIDBVRG4 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 OPA379AIDBVRG4 meets industry standards.
7.What is the process for return or replacement of OPA379AIDBVRG4?
All OPA379AIDBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA379AIDBVRG4, 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 OPA379AIDBVRG4 part is unused and in its original packaging.
Return procedure for OPA379AIDBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA379AIDBVRG4 Tags
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