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Texas Instruments OPA379AIDBVT
- Part No.:
- OPA379AIDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA379AIDBVT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:31,396
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Product details
Overview
OPA379AIDBVT from Texas Instruments is a single-channel, rail-to-rail input/output micropower operational amplifier optimized for battery-powered instrumentation. It delivers 90kHz gain-bandwidth, 2.9µA quiescent current (typ), 1.5mV max offset voltage, and 2.8µVPP (0.1Hz–10Hz) low-frequency noise - enabling precision signal conditioning in portable medical sensors and handheld test equipment.
For engineers reviewing the OPA379AIDBVT datasheet, OPA379AIDBVT pinout, OPA379AIDBVT application, or OPA379AIDBVT equivalent, this page provides verified specifications, package-validated pin functions, real-world use cases in ultra-low-power analog front-ends, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The OPA379AIDBVT employs a complementary input stage to achieve rail-to-rail common-mode input range (V– – 0.1V to V+ + 0.1V) and rail-to-rail output swing (≤10mV from rails at 25kΩ load). Its 120dB open-loop gain (AOL) and 100dB CMRR support high-accuracy DC-coupled amplification in single-supply systems.
Designed for operation from 1.8V to 5.5V, the device maintains stable performance across –40°C to +125°C with only 5.5µA max quiescent current. Input bias current is ±5pA (typ), enabling high-impedance sensor interfacing without significant error from leakage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - supports direct connection to Li-ion, coin-cell, or regulated 3.3V/5V rails without level-shifting. |
| Quiescent Current | 2.9µA (typ) at 5.5V - enables multi-year battery life in always-on sensing nodes. |
| Gain-Bandwidth Product | 90kHz - sufficient for ECG, pulse oximetry, and thermistor signal conditioning up to ~10kHz. |
| 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) - critical for low-frequency bio-signal integrity in medical devices. |
| CMRR | 100dB (typ) - rejects common-mode interference from noisy digital subsystems in mixed-signal PCBs. |
| Output Swing | Within 10mV of rails (RL = 25kΩ) - maximizes dynamic range in 1.8V–3.3V ADC interfaces. |
Pinout & Package
SOT-23-5 package (DBV), 5-pin surface-mount, 2.9mm × 1.6mm footprint, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN– | Inverting input | Accepts feedback network; rail-to-rail input range enables single-supply differential configurations. |
| 2 - IN+ | Non-inverting input | High-impedance (1013Ω) node; ±5pA bias current allows direct connection to high-Z sources like pH electrodes. |
| 3 - V– | Negative supply | Ground reference for single-supply operation; must be tied to system GND when VS = V+. |
| 4 - OUT | Amplifier output | Rail-to-rail capable; drives 25kΩ loads within 10mV of rails - suitable for driving SAR ADC inputs directly. |
| 5 - V+ | Positive supply | Accepts 1.8V–5.5V; internal regulation not required - simplifies power design in space-constrained layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full utilization of 1.8V–5.5V supply headroom - eliminates need for dual supplies in portable instrumentation. |
| 2.9µA quiescent current | Reduces average power to <15µW at 5V - extends battery life in wireless sensor nodes by >3× vs. standard op amps. |
| 1.5mV max offset voltage | Minimizes calibration burden in factory-trimmed medical devices; avoids costly auto-zero circuitry. |
| 2.8µVPP low-frequency noise | Preserves signal fidelity in sub-10Hz physiological measurements (e.g., respiration rate, slow temperature drift). |
| –40°C to +125°C operation | Validated for automotive cabin sensors, industrial field transmitters, and outdoor IoT edge nodes. |
Applications
| Battery-Powered Gas Sensor | Portable ECG Front-End |
|---|---|
Use Scenario: Amplifying low-level current from electrochemical gas cell (e.g., CO, NO2) with 1.8V coin-cell supply. IC Role / Device Role / Timing Role: Transimpedance amplifier converting pA-level sensor current to measurable voltage; operates continuously at 2.9µA. Use Value: 90kHz bandwidth captures transient gas events; rail-to-rail output interfaces directly to 12-bit ADC without external level-shifting. |
Use Scenario: Conditioning biopotential signals from dry electrodes in handheld ECG monitor with 3.3V LiPo supply. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier gain stage; handles DC-coupled electrode offsets and 0.5–40Hz bandpass filtering. Use Value: 2.8µVPP noise ensures ≥80dB SNR for microvolt-level R-wave detection; 100dB CMRR rejects 50/60Hz mains interference. |
| Handheld Multimeter Input Stage | Low-Power Thermistor Interface |
Use Scenario: High-impedance buffer for 10MΩ input resistance in pocket-sized multimeter measuring mV–V DC ranges. IC Role / Device Role / Timing Role: Unity-gain follower isolating DMM input from internal ADC; operates from 3V CR2032 battery. Use Value: ±5pA input bias current limits voltage error to <50µV at 10MΩ source impedance - meets Class II accuracy specs. |
Use Scenario: Linearizing and amplifying resistance changes from NTC thermistor in wearable temperature logger. IC Role / Device Role / Timing Role: Constant-current excitation amplifier + ratiometric voltage buffer feeding 16-bit delta-sigma ADC. Use Value: 1.5mV max offset contributes <±0.2°C error over –20°C to +85°C; 5.5µA max IQ enables 5-year battery life at 1-sample/sec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2241IDBVR | Higher 0.6mV max VOS but lower 5.5kHz GBW; 1.8V–12V supply range. | Less suitable for >10kHz sensor signals; better for wide-VS industrial control loops. | Choose TLV2241IDBVR if supply exceeds 5.5V or offset-critical DC gain stability outweighs bandwidth needs. |
| OPA347UA/2K5 | 20µA IQ (7× higher), 350kHz GBW, 2mV max VOS; same 1.8V–5.5V range. | Supports faster settling in data acquisition; trades battery life for speed in mid-power designs. | Choose OPA347UA/2K5 when 90kHz is insufficient - e.g., for 100ksps sampling with <1LSB settling error. |
Compared with TLV2241IDBVR and OPA347UA/2K5, the OPA379AIDBVT uniquely balances sub-3µA quiescent current, 90kHz bandwidth, and 2.8µVPP noise - making it optimal for always-on, battery-limited applications where both precision and longevity are non-negotiable.
Availability
OPA379AIDBVT is available at Aetrix Electronics and suitable for battery-powered instruments, portable medical devices, and handheld test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA379AIDBVT 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 chains.
The OPA379 family was engineered specifically for ultra-low-power, high-precision analog front-ends in portable and remote sensing applications - prioritizing micropower operation without sacrificing DC accuracy or noise performance.
FAQ
What is the maximum operating temperature for the OPA379AIDBVT?
The OPA379AIDBVT is fully specified and tested from –40°C to +125°C. This extended temperature range is validated per TI's production test flow and supports deployment in automotive under-hood sensors, industrial field transmitters, and outdoor environmental monitoring equipment where ambient temperatures exceed 85°C.
Does the OPA379AIDBVT support rail-to-rail output swing at 1.8V supply?
Yes, the OPA379AIDBVT achieves rail-to-rail output swing down to 1.8V supply, with typical output swing within 10mV of each rail at 25kΩ load. This capability is explicitly characterized in the Electrical Characteristics table (VS = 1.8V to 5.5V) and enables full dynamic range utilization in low-voltage battery-powered systems.
Can the OPA379AIDBVT drive capacitive loads without instability?
The OPA379AIDBVT can drive up to 30pF capacitive load in unity-gain configuration without compensation. For loads exceeding 30pF, TI recommends adding a 10Ω–20Ω series resistor (RS) between output and load - a technique validated in Figure 21 of the SBOS347D datasheet to suppress ringing while preserving DC accuracy.
What is the input bias current specification for OPA379AIDBVT at 85°C?
At +85°C, the OPA379AIDBVT maintains input bias current ≤±50pA (max), as specified in the Electrical Characteristics table under "INPUT BIAS CURRENT" with test condition VS = 5V, VCM ≤ VS/2. This low, temperature-stable bias enables reliable interfacing with high-impedance sources like piezoelectric sensors and pH electrodes.
Is the OPA379AIDBVT pin-compatible with other SOT-23-5 op amps?
No - the OPA379AIDBVT uses TI's standard SOT-23-5 pinout (IN–, IN+, V–, OUT, V+), but pin compatibility cannot be assumed across manufacturers or families. Always verify pin function mapping against the specific device's datasheet; for example, some competitors assign V+ and V– to different pins, risking damage if substituted blindly.
OPA379AIDBVT 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
OPA379AIDBVT FAQ
1.How can I place an order for OPA379AIDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA379AIDBVT 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 OPA379AIDBVT reliable?
The price and inventory of OPA379AIDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA379AIDBVT is usually 5 days.
3.What payment methods are accepted for OPA379AIDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA379AIDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA379AIDBVT?
OPA379AIDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA379AIDBVT 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 OPA379AIDBVT?
For technical support, including OPA379AIDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA379AIDBVT requirements.
6.How does Aetrix verify that OPA379AIDBVT is sourced from the original manufacturer or authorized distributors?
All OPA379AIDBVT 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 OPA379AIDBVT meets industry standards.
7.What is the process for return or replacement of OPA379AIDBVT?
All OPA379AIDBVT units undergo pre-shipment inspection (PSI). If there is an issue with OPA379AIDBVT, 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 OPA379AIDBVT part is unused and in its original packaging.
Return procedure for OPA379AIDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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