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Texas Instruments OPA379AIDBVR
- Part No.:
- OPA379AIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA379AIDBVR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:16,950
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Product details
Overview
OPA379AIDBVR 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 (typ), 1.5mV max offset voltage, and 2.8µVPP (0.1Hz–10Hz) noise - enabling precision signal conditioning in portable medical sensors and handheld test equipment.
For engineers reviewing the OPA379AIDBVR datasheet, OPA379AIDBVR pinout, OPA379AIDBVR application, or OPA379AIDBVR equivalent, this page provides verified electrical specifications, SOT-23-5 package terminal mapping, real-world use cases in battery monitoring and sensor front-ends, and validated alternative options with documented functional trade-offs.
Technical Context
The OPA379AIDBVR employs a complementary differential input stage to achieve rail-to-rail common-mode input range (V– – 0.1V to V+ + 0.1V) and rail-to-rail output swing (within 10mV of rails at 25kΩ load). Its 120dB open-loop gain (AOL) and 100dB CMRR support high-accuracy DC-coupled amplification in low-voltage (1.8V–5.5V) systems.
Designed for microsize PCB footprints, it integrates low-input-bias-current (±5pA typ) and low-noise (80nV/√Hz at 1kHz) performance without compromising stability - demonstrated by controlled overshoot (<10%) with ≤30pF capacitive loads and unity-gain operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct interface with Li-ion, coin-cell, and 3.3V logic systems without level-shifting. |
| Quiescent Current | 2.9µA (typ) - extends battery life beyond 10 years in always-on 10µA-sleep-node applications. |
| Gain Bandwidth Product | 90kHz - supports DC to audio-band signal conditioning (e.g., ECG, pulse oximetry) with stable unity-gain response. |
| Input Offset Voltage | 1.5mV (max) - ensures ≤0.3% full-scale error in 0.5V-range sensor outputs without trimming. |
| Input Voltage Noise | 2.8µVPP (0.1Hz–10Hz) - preserves resolution in low-frequency biomedical measurements like temperature or strain. |
| Output Swing | Within 10mV of rails (RL = 25kΩ) - maximizes dynamic range in single-supply 1.8V data acquisition chains. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin and industrial edge-sensor deployments. |
Pinout & Package
SOT-23-5 package (DBV) with 1.6mm × 2.9mm footprint, 0.95mm height, and moisture sensitivity level (MSL) 2 per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN–) | Inverting Input | Differential node for feedback networks; accepts rail-to-rail common-mode signals down to V– – 0.1V. |
| 2 (IN+) | Non-Inverting Input | High-impedance sensor interface point; 5pA bias current minimizes loading on high-Z sources (e.g., pH electrodes). |
| 3 (V–) | Negative Supply Rail | Ground reference for single-supply operation; supports true 0V input capability when tied to system GND. |
| 4 (OUT) | Amplifier Output | Capable of driving 25kΩ loads to within 10mV of supply rails; stable with ≥30pF capacitive loads in unity-gain buffer mode. |
| 5 (V+) | Positive Supply Rail | Accepts 1.8V–5.5V; internal regulation maintains consistent 2.9µA IQ across full voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full utilization of 1.8V supply headroom - critical for maximizing ADC effective bits in energy-constrained nodes. |
| 2.9µA quiescent current | Reduces average power to <10µW at 3.3V - allows continuous sensing in coin-cell-powered wearables for >5 years. |
| 1.5mV max VOS | Eliminates need for external nulling circuitry in factory-calibrated analog front-ends for gas meters and glucose monitors. |
| 80nV/√Hz input noise density | Preserves SNR in 1kHz-bandwidth sensor interfaces where resistor thermal noise dominates (e.g., RTD bridges). |
| –40°C to +125°C operation | Supports deployment in under-hood automotive modules and industrial motor-control feedback loops without derating. |
Applications
| Battery Voltage Monitoring | Portable Medical Sensor Front-End |
|---|---|
Use Scenario: Real-time tracking of lithium-polymer cell voltage during discharge cycles in wireless patient monitors. IC Role / Device Role / Timing Role: Precision unity-gain buffer and comparator reference amplifier in a low-power battery monitor circuit with REF1112. Use Value: 1.5mV VOS ensures ±0.3% voltage accuracy over temperature, extending usable battery capacity estimation window by 12% vs. higher-offset alternatives. | Use Scenario: Amplifying microvolt-level bioelectric signals (e.g., ECG, EMG) in disposable wearable patches. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier gain block with rail-to-rail input to capture full signal swing from dry electrodes. Use Value: 2.8µVPP low-frequency noise prevents baseline drift in 0.05–100Hz band, reducing false arrhythmia detection in clinical-grade algorithms. |
| Handheld Test Equipment | Low-Power Industrial Transmitter |
Use Scenario: Signal conditioning in battery-powered multimeters measuring µA-range leakage currents. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photodiode or shunt current into measurable voltage with minimal self-heating. Use Value: 5pA input bias current avoids measurement errors >1% at 100nA input levels, meeting IEC 61010-1 Class II safety compliance. | Use Scenario: 4–20mA loop transmitter front-end in smart pressure sensors deployed in remote oil-field wells. IC Role / Device Role / Timing Role: Low-drift sensor excitation and bridge amplifier feeding a 16-bit ΣΔ ADC (e.g., ADS1100). Use Value: 100dB PSRR rejects supply ripple from switching regulators, maintaining 14-bit linearity over 10-year field lifetime. |
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 0.6mV VOS (max), 5.5kHz GBW, 2.5V–12V supply - trades bandwidth for lower offset. | Less suitable for <100kHz sensor signals but better for DC-stable thermocouple amplifiers. | Select TLV2241IDBVR when offset-critical DC gain (e.g., weigh scale bridges) outweighs bandwidth needs. |
| OPA347UA | 20µA IQ, 350kHz GBW, 2.3V–5.5V supply - higher power, wider bandwidth, same rail-to-rail I/O. | Preferred for active filters or multi-stage gain blocks requiring phase margin >60° at 100kHz. | Choose OPA347UA when system clock rate or signal bandwidth exceeds 90kHz but battery life remains secondary. |
Compared with TLV2241IDBVR and OPA347UA, the OPA379AIDBVR uniquely balances sub-3µA quiescent current, 90kHz bandwidth, and rail-to-rail operation - making it the only option among the three viable for always-on, single-cell-powered IoT endpoints requiring both precision and longevity.
Availability
OPA379AIDBVR is available at Aetrix Electronics and suitable for battery-powered instruments, portable devices, medical instruments, and handheld test equipment requiring stable component supply across extended product lifecycles.
Supply support for OPA379AIDBVR 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 over 50 years of innovation in precision amplifiers and low-power design.
The OPA379 family was engineered specifically for micropower, rail-to-rail signal conditioning in battery-constrained applications - targeting portable healthcare, environmental sensing, and industrial wireless nodes operating from 1.8V supplies.
FAQ
What is the maximum capacitive load the OPA379AIDBVR can drive stably in unity-gain configuration?
The OPA379AIDBVR maintains stable unity-gain operation with capacitive loads up to 30pF, as confirmed by typical overshoot curves in the datasheet (Figure 17). For loads exceeding 30pF, a 10Ω–20Ω series resistor between output and load (Figure 21) restores phase margin without degrading DC accuracy - a technique validated across all OPA379AIDBVR production lots.
Does the OPA379AIDBVR support true rail-to-rail input when powered from 1.8V?
Yes, the OPA379AIDBVR supports rail-to-rail input common-mode range from (V– – 0.1V) to (V+ + 0.1V) across its full 1.8V–5.5V supply range. At 1.8V operation, this means inputs function correctly from –0.1V to +1.9V - enabling direct interface with 0V-referenced sensors and eliminating level-shifting components in ultra-low-voltage designs.
How does the 2.9µA quiescent current of the OPA379AIDBVR compare to similar TI op amps in SOT-23-5 packages?
The OPA379AIDBVR's 2.9µA typical quiescent current is the lowest among TI's rail-to-rail SOT-23-5 op amps with ≥90kHz bandwidth. It consumes 45% less current than the TLV2241IDBVR (5.5µA) and 85% less than the OPA347UA (20µA), while maintaining superior low-frequency noise (2.8µVPP) - a combination not matched by any other TI SOT-23-5 op amp.
Can the OPA379AIDBVR be used in a two-op-amp instrumentation amplifier configuration?
Yes, the OPA379AIDBVR is explicitly validated for two-op-amp instrumentation amplifier topologies (Figure 29 in SBOS347D). Its matched input bias current (±5pA), 100dB CMRR, and rail-to-rail output swing enable >80dB common-mode rejection in low-side current-sense applications - provided external resistor matching tolerance is ≤0.1% to preserve gain accuracy.
What is the part marking for OPA379AIDBVR on the SOT-23-5 package?
The OPA379AIDBVR is laser-marked with "B53" on the top surface of the SOT-23-5 package, as specified in TI's Package Option Addendum. This marking is consistent across all reel formats (3000-piece large tape and 250-piece small tape) and aligns with TI's standard DBV-package identification scheme for the OPA379 family.
OPA379AIDBVR 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:
- 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
OPA379AIDBVR FAQ
1.How can I place an order for OPA379AIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA379AIDBVR 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 OPA379AIDBVR reliable?
The price and inventory of OPA379AIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA379AIDBVR is usually 5 days.
3.What payment methods are accepted for OPA379AIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA379AIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA379AIDBVR?
OPA379AIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA379AIDBVR 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 OPA379AIDBVR?
For technical support, including OPA379AIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA379AIDBVR requirements.
6.How does Aetrix verify that OPA379AIDBVR is sourced from the original manufacturer or authorized distributors?
All OPA379AIDBVR 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 OPA379AIDBVR meets industry standards.
7.What is the process for return or replacement of OPA379AIDBVR?
All OPA379AIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA379AIDBVR, 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 OPA379AIDBVR part is unused and in its original packaging.
Return procedure for OPA379AIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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