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Texas Instruments OPA2379AID
- Part No.:
- OPA2379AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2379AID.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:488
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Product details
Overview
OPA2379AID from Texas Instruments is a dual micropower rail-to-rail input/output operational amplifier optimized for ultra-low-power, low-voltage battery-powered systems. It delivers 90kHz gain-bandwidth, 2.9µA quiescent current per amplifier, and 1.5mV max offset voltage across 1.8V to 5.5V supply, enabling precision signal conditioning in portable gas meters and handheld medical instruments.
For engineers reviewing the OPA2379AID datasheet, OPA2379AID pinout, OPA2379AID application, or OPA2379AID equivalent, key selection criteria include its 2.9µA IQ at 1.8V, rail-to-rail I/O swing within 10mV of rails (RL = 25kΩ), 2.8µVPP 0.1Hz–10Hz noise, and SOIC-8 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA2379AID employs a complementary input stage enabling rail-to-rail common-mode input range (V– – 0.1V to V+ + 0.1V) and achieves 100dB CMRR and PSRR at DC. Its 90kHz GBW and 0.03V/µs slew rate support stable unity-gain buffer configurations with capacitive loads up to 30pF when using series output resistance.
Designed for operation from –40°C to +125°C, it maintains 5.5µA max IQ over temperature and exhibits 2.7µV/°C offset drift (–40°C to +125°C). Input bias current remains ≤ ±50pA, supporting high-impedance sensor interfaces without significant error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct interface with single-cell Li-ion (3.0–3.7V), alkaline (1.8–3.2V), or coin-cell (1.8–3.0V) power sources |
| Quiescent Current per Amp | 2.9µA typ / 5.5µA max - allows continuous operation for years on a single CR2032 battery in always-on monitoring circuits |
| Gain-Bandwidth Product | 90kHz - supports DC-coupled amplification of slow-varying biosignals (ECG, pulse oximetry) and sensor outputs (thermistors, strain gauges) |
| Input Offset Voltage | 1.5mV max - ensures ≤0.3% full-scale error in 500mV-range analog front-ends without trimming |
| Input Voltage Noise | 2.8µVPP (0.1Hz–10Hz) - critical for low-frequency precision measurement where 1/f noise dominates |
| Output Swing (RL = 25kΩ) | Within 10mV of rails - preserves dynamic range in single-supply systems with limited headroom |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive under-hood sensor signal conditioning |
Pinout & Package
OPA2379AID is housed in an 8-pin SOIC (D) package with standard 1.27mm pitch, 3.9mm × 4.9mm footprint, and 1.75mm height. Pin 1 is marked by a beveled corner or dot; device marking is "2379A".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | Accepts differential input signal referenced to non-inverting input; high-impedance node (10¹³Ω) |
| 2 | Non-Inverting Input (Amplifier A) | Reference input for Amplifier A; rail-to-rail common-mode range supports ground-sensing applications |
| 3 | Output (Amplifier A) | Delivers amplified signal with rail-to-rail swing; capable of sourcing/sinking ±5mA short-circuit current |
| 4 | Ground / Negative Supply | Return path for both amplifiers; must be low-impedance to maintain PSRR >100dB |
| 5 | Non-Inverting Input (Amplifier B) | Independent reference input for second amplifier; electrically isolated from Amplifier A inputs |
| 6 | Inverting Input (Amplifier B) | Differential input for Amplifier B; shares same input stage architecture and bias current specs as Pin 1 |
| 7 | Output (Amplifier B) | Second independent output; identical AC/DC performance to Pin 3, enabling dual-channel signal paths |
| 8 | Positive Supply | Power input for both amplifiers; bypass capacitor (0.1µF) required adjacent to this pin for stability |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 1.8V supply range in single-ended configurations, eliminating level-shifting circuitry |
| 2.9µA quiescent current per amplifier | Reduces total system power by >50% vs. comparable 5µA op amps, extending battery life in portable diagnostics |
| 2.8µVPP 0.1Hz–10Hz noise | Supports sub-microvolt resolution in DC-coupled thermopile or pH electrode amplifiers without external filtering |
| 100dB CMRR and PSRR | Maintains accuracy in noisy environments (e.g., motor-driven medical pumps) without additional shielding or filtering |
| Specified from –40°C to +125°C | Validates performance across automotive cabin and industrial control ambient conditions without derating |
Applications
| Battery-Powered Instrumentation | Portable Medical Devices |
|---|---|
Use Scenario: Precision analog front-end for handheld blood glucose meters measuring 0.1–1.5V electrochemical sensor output. IC Role / Device Role / Timing Role: Dual op amp configured as transimpedance amplifier (Ch A) and reference buffer (Ch B) for ADC driver. Use Value: 2.9µA IQ enables >2-year shelf life on CR2032; rail-to-rail I/O captures full sensor dynamic range without supply scaling. | Use Scenario: Signal conditioning for wearable ECG electrodes capturing microvolt-level cardiac signals. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier (dual OPA2379AID) with matched gain resistors for common-mode rejection. Use Value: 2.8µVPP low-frequency noise prevents baseline wander; 100dB CMRR rejects 50/60Hz interference from ambient mains coupling. |
| Handheld Test Equipment | Low-Power Sensor Interfaces |
Use Scenario: Input buffer and autoranging amplifier in pocket-sized multimeters measuring 100µA–10A current via shunt resistors. IC Role / Device Role / Timing Role: Dual-channel configuration: Ch A buffers high-impedance voltage inputs; Ch B drives current-source DAC for auto-ranging. Use Value: 1.5mV max VOS minimizes zero-error in µA-range measurements; 90kHz GBW supports fast settling during range switching. | Use Scenario: Signal conditioning for MEMS pressure sensors in IoT environmental monitors operating on AA batteries. IC Role / Device Role / Timing Role: Single-supply difference amplifier converting ratiometric bridge output to 0–1.8V for 12-bit SAR ADC. Use Value: 1.8V minimum supply allows direct connection to LDO output; 50pA max input bias avoids loading high-Z bridge elements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2242IDR | Higher IQ (1µA vs 2.9µA), lower GBW (5.5kHz), higher VOS (0.6mV max) | Better for ultra-low-power <1kHz sensor buffering; insufficient bandwidth for fast step-response applications | Select TLV2242IDR only when bandwidth demand is <10kHz and lowest possible IQ is critical |
| OPA2347UA | Higher IQ (20µA), higher GBW (350kHz), wider supply (2.3V–5.5V), higher VOS (2mV max) | Suitable for higher-speed portable audio or motor control feedback where 2.9µA IQ is not mandatory | Choose OPA2347UA when 90kHz GBW is insufficient and system can tolerate 7× higher quiescent current |
Compared with TLV2242IDR and OPA2347UA, the OPA2379AID uniquely balances sub-3µA IQ, 90kHz bandwidth, and 1.5mV VOS in a single SOIC-8 package-making it optimal for battery-powered instrumentation requiring both precision and longevity.
Availability
OPA2379AID is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, handheld test equipment, and low-power sensor interfaces requiring stable component supply across extended production lifecycles.
Supply support for OPA2379AID 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 system solutions.
The OPA379 family-including OPA2379AID-is engineered for ultra-low-power, low-voltage signal conditioning in battery-operated equipment, emphasizing rail-to-rail operation, nanoscale input bias, and robust DC precision across industrial temperature ranges.
FAQ
What is the maximum supply voltage rating for OPA2379AID?
The absolute maximum supply voltage for OPA2379AID is +7V, but its specified operating range is 1.8V to 5.5V. Operating above 5.5V voids guaranteed performance and risks permanent damage. For reliable long-term use in battery-powered designs, maintain VS within 1.8V–5.5V, with 5.5V being the upper limit for functional operation per datasheet specifications.
Does OPA2379AID support true rail-to-rail output swing under load?
Yes, OPA2379AID delivers rail-to-rail output swing within 10mV of each supply rail when driving RL ≥ 25kΩ. Under heavier loads (e.g., RL = 5kΩ), output swing degrades to within 25–50mV of rails. This behavior is confirmed in the Electrical Characteristics table and supports precision single-supply applications where headroom is constrained.
Can OPA2379AID drive capacitive loads without instability?
OPA2379AID remains stable with capacitive loads ≤30pF in unity-gain configurations. For larger loads, TI recommends adding a 10Ω–20Ω series resistor between the output and capacitive node (Figure 21). This preserves DC accuracy while suppressing ringing-verified in Typical Characteristics (Figure 17). No internal compensation is required.
What is the input common-mode voltage range for OPA2379AID?
The input common-mode voltage range for OPA2379AID extends from (V–) – 0.1V to (V+) + 0.1V, enabling true rail-to-rail input operation. 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.
Is OPA2379AID RoHS-compliant and lead-free?
Yes, OPA2379AID is RoHS-compliant and lead-free, with "Green (RoHS & no Sb/Br)" eco plan and NIPDAU lead finish. It meets JEDEC MSL Level-2-260°C-1 year moisture sensitivity classification and is qualified for reflow soldering per IPC/JEDEC J-STD-020. Full compliance documentation is available in TI's Package Option Addendum.
OPA2379AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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:
- 8-SOIC
OPA2379AID FAQ
1.How can I place an order for OPA2379AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2379AID 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 OPA2379AID reliable?
The price and inventory of OPA2379AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2379AID is usually 5 days.
3.What payment methods are accepted for OPA2379AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2379AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2379AID?
OPA2379AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2379AID 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 OPA2379AID?
For technical support, including OPA2379AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2379AID requirements.
6.How does Aetrix verify that OPA2379AID is sourced from the original manufacturer or authorized distributors?
All OPA2379AID 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 OPA2379AID meets industry standards.
7.What is the process for return or replacement of OPA2379AID?
All OPA2379AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2379AID, 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 OPA2379AID part is unused and in its original packaging.
Return procedure for OPA2379AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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