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Texas Instruments OPA2379AIDCNR
- Part No.:
- OPA2379AIDCNR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
OPA2379AIDCNR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:7,318
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Product details
Overview
OPA2379AIDCNR 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, and 1.5mV max offset voltage across 1.8V–5.5V supply, enabling precision signal conditioning in portable gas meters and handheld test equipment.
For engineers reviewing the OPA2379AIDCNR datasheet, OPA2379AIDCNR pinout, OPA2379AIDCNR application, or OPA2379AIDCNR equivalent, key selection criteria include ultra-low IQ stability over temperature, rail-to-rail I/O swing within 10mV of rails at 25kΩ load, and verified operation from –40°C to +125°C in SOT-23-8 packaging.
Technical Context
The OPA2379AIDCNR uses a complementary input stage enabling rail-to-rail common-mode input range (V– – 0.1V to V+ + 0.1V) and achieves 100dB CMRR at DC with 2µV/V PSRR. Its 80nV/√Hz input voltage noise density and 2.8µVPP 0.1Hz–10Hz noise support low-frequency precision sensing without compromising micropower operation.
Designed for single-supply systems, it maintains 120dB open-loop gain (AOL) at 25°C with 5kΩ load and exhibits stable unity-gain behavior up to 30pF capacitive load-enhanced by optional 10Ω–20Ω series output resistor per channel as documented in TI's Figure 21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - supports direct Li-ion cell (3.0V–4.2V) and two-AA (2.4V–3.2V) battery operation without regulation. |
| Quiescent Current per Amp | 2.9µA typ / 5.5µA max - enables >1-year runtime in coin-cell-powered devices drawing <10µA system average current. |
| Gain Bandwidth Product | 90kHz - sufficient for anti-aliasing, sensor amplification, and battery monitor loop bandwidths below 10kHz. |
| Input Offset Voltage | 1.5mV max - ensures ≤0.3% error in 0.5V full-scale medical sensor outputs without trimming. |
| Output Swing (25kΩ) | Within 10mV of rails - preserves dynamic range in 1.8V-supply systems where headroom is constrained. |
| Input Bias Current | ±5pA typ - permits use with >10MΩ source impedances (e.g., pH electrodes, thermistors) without significant voltage error. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin, industrial field sensor, and medical wearable environments. |
Pinout & Package
SOT-23-8 package (DCN), 2.9mm × 1.6mm footprint, 1.45mm max height, RoHS-compliant NIPDAU finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input B (IN–B) | High-impedance differential input node for Channel B; accepts signals from V– – 0.1V to V+ + 0.1V. |
| 2 | Non-Inverting Input B (IN+B) | High-impedance differential input node for Channel B; referenced to same common-mode range as Pin 1. |
| 3 | Output B (OUTB) | Rail-to-rail output capable of sourcing/sinking ±5mA; swings within 10mV of supply rails under 25kΩ load. |
| 4 | Ground / Negative Supply (V–) | Power return path for both amplifiers; must be low-impedance to minimize PSRR degradation. |
| 5 | Positive Supply (V+) | Single-supply input (1.8V–5.5V); bypass capacitor (0.1µF) required adjacent to this pin for stability. |
| 6 | Non-Inverting Input A (IN+A) | High-impedance differential input node for Channel A; electrically identical to Pin 2. |
| 7 | Inverting Input A (IN–A) | High-impedance differential input node for Channel A; electrically identical to Pin 1. |
| 8 | Output A (OUTA) | Rail-to-rail output for Channel A; independent of OUTB; shares V+ and V– supply connections. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Enables full utilization of 1.8V supply range: inputs accept signals 100mV beyond rails; outputs drive within 10mV of rails at 25kΩ. |
| 2.9µA Quiescent Current | Per-amplifier draw allows dual-channel operation at <6µA total, critical for multi-year battery life in portable diagnostics. |
| 2.8µVPP Low-Frequency Noise | 0.1Hz–10Hz integrated noise supports high-resolution DC-coupled measurements in ECG front-ends and strain gauge bridges. |
| 100dB CMRR & PSRR | Rejects supply ripple and common-mode interference in noisy industrial environments without external filtering. |
| –40°C to +125°C Operation | Validated performance across automotive and industrial temperature extremes without derating or thermal compensation. |
Applications
| Portable Gas Meter | Battery-Powered Medical Sensor |
|---|---|
Use Scenario: Signal amplification of electrochemical sensor output in handheld CO/H₂S detectors operating on CR2032 coin cells. IC Role / Device Role / Timing Role: Dual-channel op amp configured as transimpedance amplifier (Channel A) and reference buffer (Channel B) for analog front-end. Use Value: 2.9µA IQ extends battery life to >2 years; rail-to-rail I/O maximizes ADC dynamic range from 1.8V supply. |
Use Scenario: Amplifying low-level biopotential signals (e.g., skin conductance, pulse oximetry) in wearable health monitors. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer and second-stage gain stage with 90kHz GBW. Use Value: 5pA input bias current prevents loading of high-impedance dry-electrode interfaces; 2.8µVPP noise preserves signal fidelity. |
| Handheld Test Equipment | Industrial Temperature Transmitter |
Use Scenario: Precision voltage/current measurement in pocket-sized multimeters powered by two AAA batteries. IC Role / Device Role / Timing Role: Dual op amp used for auto-ranging attenuator buffering and reference voltage scaling. Use Value: 1.5mV max VOS ensures <0.1% absolute accuracy at 1V range; 125°C rating supports internal self-test at elevated ambient. |
Use Scenario: Conditioning RTD/thermocouple signals in loop-powered 4–20mA transmitters mounted in hot industrial enclosures. IC Role / Device Role / Timing Role: Cold-junction compensation amplifier and sensor excitation buffer operating from 3.3V regulated rail. Use Value: 100dB PSRR rejects 50/60Hz line noise coupled into 24V loop supply; –40°C to +125°C spec covers full transmitter operating range. |
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), wider supply (2.5V–12V). | Better for 3.3V/5V systems needing lower power but not sub-10kHz bandwidth; unsuitable for 1.8V or <100kHz designs. | Select TLV2242IDR only when supply ≥2.5V and bandwidth ≤5kHz suffices; avoid for 1.8V or portable gas meter use. |
| OPA2347UA | Higher IQ (20µA), higher GBW (350kHz), higher VOS (2mV max), narrower supply (2.3V–5.5V). | Supports faster settling in data acquisition but consumes >6× more current; requires ≥2.3V minimum supply. | Choose OPA2347UA only when >100kHz bandwidth is mandatory and battery life is secondary; not viable for coin-cell operation. |
Compared with TLV2242IDR and OPA2347UA, the OPA2379AIDCNR uniquely balances 1.8V operation, 90kHz bandwidth, and sub-3µA quiescent current-making it the sole option for long-life, low-voltage, medium-bandwidth dual-amplifier applications.
Availability
OPA2379AIDCNR is available at Aetrix Electronics and suitable for portable gas meters, handheld test equipment, and battery-powered medical sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2379AIDCNR 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 OPA2379AIDCNR belongs to TI's OPAx379 micropower op amp family, engineered specifically for battery-operated instrumentation where ultra-low quiescent current, rail-to-rail operation, and DC precision must coexist at 1.8V supply.
FAQ
What is the maximum capacitive load the OPA2379AIDCNR can drive stably in unity-gain configuration?
The OPA2379AIDCNR maintains stable unity-gain operation with up to 30pF capacitive load, as confirmed in TI's Typical Characteristics (Figure 17). For loads exceeding 30pF, a 10Ω–20Ω series resistor between output and load (per Figure 21) reduces overshoot while preserving DC accuracy. This design constraint is critical for driving ADC input capacitance or long PCB traces in portable instruments.
Does the OPA2379AIDCNR support true rail-to-rail input common-mode range?
Yes, the OPA2379AIDCNR supports rail-to-rail input with a common-mode voltage range from (V–) – 0.1V to (V+) + 0.1V, verified across –40°C to +125°C. However, CMRR degrades above (V+) – 1V due to input stage transition; for highest precision, keep common-mode voltage ≤1V below V+. This behavior is explicitly documented in the Electrical Characteristics table under "Common-Mode Voltage Range" and Figure 8.
What is the typical quiescent current of the OPA2379AIDCNR at 1.8V supply and 25°C?
The typical quiescent current of the OPA2379AIDCNR is 2.9µA per amplifier at VS = 1.8V and TA = +25°C, as specified in the Electrical Characteristics table (page 5, "Quiescent Current per Amplifier"). This value increases to 5.5µA max over full temperature and voltage range, making it among the lowest-IQ dual op amps compatible with 1.8V operation.
Can the OPA2379AIDCNR be used in a single-supply 1.8V system without level-shifting circuitry?
Yes, the OPA2379AIDCNR is fully specified for single-supply operation from 1.8V to 5.5V and features rail-to-rail input/output. At 1.8V, its output swings within 10mV of both rails under 25kΩ load, and inputs accept signals from –0.1V to +1.9V - eliminating need for external level shifters in low-voltage sensor interfaces like those in wearable health devices.
What package options are available for the OPA2379AIDCNR, and what is its marking code?
The OPA2379AIDCNR is exclusively offered in the SOT-23-8 package (DCN drawing), with device marking "BPK" laser-etched on the top surface. It is supplied in 3000-unit tape-and-reel format (reel diameter 179.0mm, width 8.4mm), RoHS-compliant, and rated MSL Level-2-260°C-1 year per JEDEC J-STD-020.
OPA2379AIDCNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- 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:
- SOT-23-8
OPA2379AIDCNR FAQ
1.How can I place an order for OPA2379AIDCNR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2379AIDCNR 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 OPA2379AIDCNR reliable?
The price and inventory of OPA2379AIDCNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2379AIDCNR is usually 5 days.
3.What payment methods are accepted for OPA2379AIDCNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2379AIDCNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2379AIDCNR?
OPA2379AIDCNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2379AIDCNR 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 OPA2379AIDCNR?
For technical support, including OPA2379AIDCNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2379AIDCNR requirements.
6.How does Aetrix verify that OPA2379AIDCNR is sourced from the original manufacturer or authorized distributors?
All OPA2379AIDCNR 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 OPA2379AIDCNR meets industry standards.
7.What is the process for return or replacement of OPA2379AIDCNR?
All OPA2379AIDCNR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2379AIDCNR, 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 OPA2379AIDCNR part is unused and in its original packaging.
Return procedure for OPA2379AIDCNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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