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Texas Instruments OPA2379AIDG4
- Part No.:
- OPA2379AIDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2379AIDG4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,070
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Product details
Overview
OPA2379AIDG4 from Texas Instruments is a dual micropower rail-to-rail input/output operational amplifier optimized for battery-powered instrumentation. It delivers 90kHz gain-bandwidth, 2.9µA quiescent current per amplifier, 1.5mV max offset voltage, and operates from 1.8V to 5.5V supply-enabling ultra-low-power signal conditioning in portable gas meters and handheld medical sensors.
For engineers reviewing the OPA2379AIDG4 datasheet, OPA2379AIDG4 pinout, OPA2379AIDG4 application, or OPA2379AIDG4 equivalent, key selection criteria include its 2.8µVPP (0.1Hz–10Hz) noise floor, ±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 industrial temperature range.
Technical Context
The OPA2379AIDG4 employs a complementary differential input stage enabling rail-to-rail common-mode input range (VCM = V– – 0.1V to V+ + 0.1V) and rail-to-rail output swing (5mV from rails, RL = 25kΩ). Its 120dB open-loop gain (AOL) and 100dB CMRR support precision DC-coupled amplification in low-voltage sensor front-ends.
Designed for microsize PCBs, it integrates two independent amplifiers in an SOIC-8 package with thermal resistance θJA = 150°C/W. The device features 80nV/√Hz wideband noise density at 1kHz and maintains stability with capacitive loads up to 30pF in unity-gain buffer configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - supports single-cell Li-ion, alkaline, or coin-cell battery operation without level-shifting circuitry. |
| Quiescent Current per Amplifier | 2.9µA (typ), 5.5µA (max) - enables >1-year battery life in always-on wearable sensors drawing <10µA system current. |
| Gain-Bandwidth Product | 90kHz - sufficient for DC–10kHz physiological signals (ECG, pulse oximetry) and slow industrial transducer outputs. |
| Input Offset Voltage | 1.5mV (max) - ensures ≤0.3% full-scale error in 500mV-range bridge sensor interfaces without trimming. |
| Input Bias Current | ±5pA (typ) - minimizes voltage drop across high-impedance pH electrodes or photodiode feedback networks. |
| Output Voltage Swing | Within 10mV of rails (RL = 25kΩ) - maximizes dynamic range in 1.8V-supply data acquisition systems. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin modules, industrial field transmitters, and outdoor IoT edge nodes. |
Pinout & Package
OPA2379AIDG4 is housed in an 8-pin SOIC (D) package with standard JEDEC outline, 150°C/W thermal resistance, and RoHS-compliant NiPdAu lead finish. Pin 1 is marked by a beveled corner or dot; orientation follows TI's SOIC-8 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | Accepts negative feedback or signal inversion path; high-impedance node (1013Ω) minimizes loading on high-Z sources. |
| 2 | Non-Inverting Input (Amplifier A) | Reference or sensor signal input; rail-to-rail common-mode range allows direct connection to battery-midpoint or thermistor dividers. |
| 3 | Output (Amplifier A) | Delivers rail-to-rail buffered output; capable of driving 25kΩ loads with <10mV headroom to rails. |
| 4 | Ground / Negative Supply | Common return for both amplifiers; must be low-impedance to maintain PSRR >100dB and prevent ground bounce in dual-channel designs. |
| 5 | Non-Inverting Input (Amplifier B) | Independent input for second channel; identical electrical specs to Pin 2 enable matched dual-sensor conditioning. |
| 6 | Inverting Input (Amplifier B) | Second amplifier's feedback node; layout symmetry with Pins 1–3 reduces crosstalk in stereo or differential pair applications. |
| 7 | Output (Amplifier B) | Second rail-to-rail output; supports independent gain stages or shared reference architectures without inter-channel coupling. |
| 8 | Positive Supply | Power input for both amplifiers; requires 0.1µF ceramic bypass capacitor placed ≤2mm from Pin 8 to suppress 100kHz+ supply noise. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Enables full utilization of 1.8V supply range in single-ended sensor interfaces, eliminating need for level-shifting or dual supplies. |
| 2.8µVPP Low-Frequency Noise | Preserves signal integrity in DC-coupled applications like thermopile or strain gauge amplification where 0.1Hz–10Hz noise dominates error budget. |
| 100dB CMRR & PSRR | Rejects power supply ripple and common-mode interference in noisy industrial environments without external filtering components. |
| 5pA Input Bias Current | Prevents significant offset drift in high-impedance pH probe or piezoelectric sensor circuits where leakage currents dominate measurement error. |
| Stable with 30pF Capacitive Loads | Allows direct driving of ADC input capacitors or long PCB traces without external compensation resistors in unity-gain configurations. |
Applications
| Portable Gas Meters | Battery-Powered Medical Sensors |
|---|---|
Use Scenario: Signal conditioning for electrochemical gas sensors generating µA-level currents in handheld air quality monitors. IC Role / Device Role / Timing Role: Dual op-amp configured as transimpedance amplifier (Channel A) and reference buffer (Channel B) for ratiometric sensor excitation. Use Value: 2.9µA quiescent current per amplifier extends battery life to >2 years on CR2450 coin cell; rail-to-rail I/O captures full sensor dynamic range at 2.2V supply. | Use Scenario: Front-end amplification of low-amplitude biopotential signals (e.g., ECG leads) in disposable wearable patches. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier core (with external resistors) providing 100dB CMRR and DC-coupled gain for sub-mV signals. Use Value: 1.5mV max offset voltage and 2.8µVPP noise ensure baseline stability and detectability of 50µV QRS complexes without AC coupling or digital post-processing. |
| Handheld Test Equipment | Industrial Temperature Transmitters |
Use Scenario: Precision voltage/current measurement in pocket-sized multimeters with auto-ranging and battery backup. IC Role / Device Role / Timing Role: Dual amplifier used for input protection clamping (Channel A) and autoranging gain switching (Channel B) in 4½-digit DMM front-end. Use Value: ±5pA input bias current prevents measurement errors on high-resistance ranges (>10MΩ); 90kHz GBW supports fast settling during range changes. | Use Scenario: Conditioning 4–20mA loop signals from RTD or thermocouple transmitters in hazardous-area field devices. IC Role / Device Role / Timing Role: Dual op-amp implementing 3-wire RTD bridge excitation (Channel A) and loop-current sensing (Channel B) with galvanic isolation interface. Use Value: Operation down to 1.8V enables use with low-dropout regulators in intrinsically safe barriers; –40°C to +125°C rating ensures reliability in oil/gas wellhead enclosures. |
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 7µA IQ, 5.5kHz GBW, 0.6mV VOS max - trades bandwidth for lower offset. | Better for DC-precision applications (e.g., weigh scales) where 90kHz is unnecessary but sub-mV offset is critical. | Select TLV2242IDR when offset voltage <0.6mV is mandatory and supply current <5µA is not required. |
| OPA2347UA | 20µA IQ, 350kHz GBW, 2mV VOS max - higher speed and power for faster sensor response. | Suitable for higher-bandwidth applications like ultrasonic flow meter preamps where >10kHz signal content exists. | Choose OPA2347UA when system requires >100kHz signal fidelity and can accommodate 4× higher supply current. |
Compared with TLV2242IDR and OPA2347UA, the OPA2379AIDG4 uniquely balances ultra-low 2.9µA quiescent current, 90kHz bandwidth, and rail-to-rail I/O in a single SOIC-8 package-making it optimal for space-constrained, battery-operated instrumentation where both power and signal fidelity matter.
Availability
OPA2379AIDG4 is available at Aetrix Electronics and suitable for portable gas meters, battery-powered medical sensors, handheld test equipment, and industrial temperature transmitters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2379AIDG4 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 90 years of innovation in precision analog ICs.
The OPA2379AIDG4 belongs to TI's OPAx379 family of micropower, low-voltage operational amplifiers-designed specifically for battery-powered instrumentation demanding rail-to-rail performance, ultra-low quiescent current, and robust operation from 1.8V to 5.5V.
FAQ
What is the maximum operating temperature range for the OPA2379AIDG4?
The OPA2379AIDG4 is fully specified and tested from –40°C to +125°C ambient temperature. This industrial-grade rating is validated per TI's SBOS347D datasheet and confirmed in the Package Option Addendum, making it suitable for under-hood automotive, industrial field transmitters, and outdoor IoT deployments where thermal extremes occur.
Does the OPA2379AIDG4 support true rail-to-rail input and output operation?
Yes, the OPA2379AIDG4 supports rail-to-rail input common-mode range (VCM = V– – 0.1V to V+ + 0.1V) and rail-to-rail output swing (within 10mV of rails with 25kΩ load). This capability is explicitly documented in the Electrical Characteristics table and Typical Characteristics curves of the SBOS347D datasheet, enabling full utilization of low-voltage supplies.
What is the typical quiescent current per amplifier in the OPA2379AIDG4?
The typical quiescent current per amplifier in the OPA2379AIDG4 is 2.9µA at VS = 5.5V and TA = +25°C, with a maximum of 5.5µA across temperature and process variation. This value is measured and guaranteed per the Electrical Characteristics table in SBOS347D and applies identically to both amplifiers in the dual configuration.
Can the OPA2379AIDG4 drive capacitive loads without oscillation?
Yes, the OPA2379AIDG4 is stable driving capacitive loads up to 30pF in unity-gain buffer configurations, as verified in Figure 17 (Small-Signal Overshoot vs Capacitive Load) of SBOS347D. For loads exceeding 30pF, a small series resistor (10Ω–20Ω) between output and load restores stability while preserving DC accuracy.
What package type and marking does the OPA2379AIDG4 use?
The OPA2379AIDG4 uses an 8-pin SOIC (D) package with RoHS-compliant NiPdAu lead finish and moisture sensitivity level (MSL) 2–260°C/1 year. Its package marking is "2379A", as confirmed in TI's Package Option Addendum (6-Feb-2020) and consistent across all active SOIC variants including OPA2379AID, OPA2379AIDR, and OPA2379AIDRG4.
OPA2379AIDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
OPA2379AIDG4 FAQ
1.How can I place an order for OPA2379AIDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2379AIDG4 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 OPA2379AIDG4 reliable?
The price and inventory of OPA2379AIDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2379AIDG4 is usually 5 days.
3.What payment methods are accepted for OPA2379AIDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2379AIDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2379AIDG4?
OPA2379AIDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2379AIDG4 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 OPA2379AIDG4?
For technical support, including OPA2379AIDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2379AIDG4 requirements.
6.How does Aetrix verify that OPA2379AIDG4 is sourced from the original manufacturer or authorized distributors?
All OPA2379AIDG4 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 OPA2379AIDG4 meets industry standards.
7.What is the process for return or replacement of OPA2379AIDG4?
All OPA2379AIDG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2379AIDG4, 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 OPA2379AIDG4 part is unused and in its original packaging.
Return procedure for OPA2379AIDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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