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Texas Instruments OPA4379AIPWR
- Part No.:
- OPA4379AIPWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4379AIPWR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,507
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Product details
Overview
OPA4379AIPWR from Texas Instruments is a quad 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 precision signal conditioning in portable medical sensors and handheld test equipment.
For engineers reviewing the OPA4379AIPWR datasheet, OPA4379AIPWR pinout, OPA4379AIPWR application, or OPA4379AIPWR equivalent, key selection criteria include ultra-low power consumption at 1.8V operation, rail-to-rail I/O swing within 10mV of rails, low 2.8µVPP (0.1Hz–10Hz) noise, and guaranteed performance across –40°C to +125°C.
Technical Context
The OPA4379AIPWR employs a complementary differential input stage enabling rail-to-rail common-mode input range (V– – 0.1V to V+ + 0.1V) and output swing to within 10mV of either rail under 25kΩ load. Its 90kHz GBW and 0.03V/µs slew rate support low-frequency sensor amplification without stability compromise.
Designed for single-supply micro-power systems, it achieves 100dB CMRR and PSRR at DC, with open-loop gain ≥120dB (typ) at 25°C. Input bias current is ±5pA (max), supporting high-impedance source interfacing in battery-monitoring and gas-sensing front ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct operation from single-cell Li-ion or two-cell alkaline batteries. |
| Quiescent Current per Amp | 2.9µA (typ) - allows >1-year battery life in always-on portable instruments with four active channels. |
| Gain-Bandwidth Product | 90kHz - sufficient for DC–10kHz biomedical sensor signals while maintaining phase margin with capacitive loads ≤30pF. |
| Input Offset Voltage | 1.5mV (max) - ensures <0.3% error in 0.5V full-scale bridge amplifier configurations. |
| Input Voltage Noise | 2.8µVPP (0.1Hz–10Hz) - critical for low-frequency thermopile or ECG signal integrity without 1/f noise degradation. |
| Output Swing (RL=25kΩ) | Within 10mV of rails - maximizes dynamic range in 1.8V-supply data acquisition systems. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin sensors and industrial field transmitters. |
Pinout & Package
TSSOP-14 package (PW), 5.0mm × 4.4mm × 1.2mm body, 0.65mm pitch, RoHS-compliant NIPDAU finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives low-impedance loads up to ±5mA; requires local 0.1µF bypass capacitor. |
| 2 | IN– A | Inverting input for Amplifier A - high-impedance node (1013Ω); sensitive to PCB leakage above 10pA. |
| 3 | IN+ A | Non-inverting input for Amplifier A - accepts rail-to-rail common-mode signals; clamped to rails via internal diodes. |
| 4 | V– | Negative supply rail - must be connected to system ground or negative reference; shared by all four amplifiers. |
| 5 | IN+ C | Non-inverting input for Amplifier C - electrically isolated from other inputs; supports independent sensor channel routing. |
| 6 | IN– C | Inverting input for Amplifier C - matched to IN+ C for common-mode rejection in differential configurations. |
| 7 | OUT C | Amplifier C output - identical AC/DC specs to OUT A; usable as second independent buffer or filter stage. |
| 8 | OUT A | Amplifier A output - duplicate pin for layout flexibility; electrically tied to Pin 1. |
| 9 | IN– B | Inverting input for Amplifier B - shares V– (Pin 4) and V+ (Pin 14); no internal cross-talk with other channels. |
| 10 | IN+ B | Non-inverting input for Amplifier B - supports separate biasing network for multi-channel sensor arrays. |
| 11 | V+ | Positive supply rail - connects to main 1.8V–5.5V system rail; requires dedicated 0.1µF ceramic decoupling. |
| 12 | IN+ D | Non-inverting input for Amplifier D - enables fourth independent signal path without external multiplexing. |
| 13 | IN– D | Inverting input for Amplifier D - maintains same input impedance and noise specs as other channels. |
| 14 | OUT D | Amplifier D output - fully specified for drive capability and settling time; supports simultaneous 4-channel analog front-end. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 1.8V supply range - eliminates level-shifting circuitry in low-voltage data loggers. |
| 2.9µA quiescent current per amplifier | Reduces total system standby current to <12µA for four-channel sensing - extends coin-cell battery life beyond 3 years. |
| 2.8µVPP (0.1Hz–10Hz) input noise | Preserves signal fidelity in slow-moving physiological measurements where 1/f noise dominates. |
| 1.5mV max input offset voltage | Minimizes calibration burden in factory-trimmed portable diagnostic devices - reduces need for digital offset correction. |
| Specified from –40°C to +125°C | Supports deployment in uncontrolled environments like automotive engine compartments or outdoor IoT nodes. |
Applications
| Portable Gas Sensors | Battery Voltage Monitoring |
|---|---|
Use Scenario: Amplifying low-level current from electrochemical gas cells in handheld air quality meters. IC Role / Device Role / Timing Role: Quad amplifier configured as transimpedance stage (A), reference buffer (B), comparator hysteresis generator (C), and output driver (D). Use Value: 90kHz bandwidth resolves rapid CO concentration changes; 2.9µA IQ enables continuous 24/7 monitoring on AAA batteries. | Use Scenario: Precision monitoring of Li-ion cell voltage during charge/discharge cycles in wearables. IC Role / Device Role / Timing Role: Four independent channels condition battery voltage, temperature, charger status, and load current signals. Use Value: Rail-to-rail I/O captures full 2.5V–4.2V cell range; 1.5mV VOS ensures <0.04% voltage measurement error at 3.7V nominal. |
| Handheld ECG Devices | Industrial Temperature Transmitters |
Use Scenario: Front-end amplification and filtering of microvolt-level biopotential signals in pocket-sized ECG recorders. IC Role / Device Role / Timing Role: Instrumentation amplifier core (A+B), right-leg drive buffer (C), and lead-off detection comparator (D). Use Value: 2.8µVPP noise preserves P-wave morphology; 100dB CMRR rejects 50/60Hz mains interference without guard traces. | Use Scenario: Signal conditioning for RTD and thermocouple inputs in DIN-rail mounted process controllers. IC Role / Device Role / Timing Role: Cold-junction compensation amplifier (A), RTD excitation buffer (B), linearization filter (C), and 4–20mA loop driver interface (D). Use Value: –40°C to +125°C rating matches industrial ambient requirements; 5pA input bias prevents self-heating errors in high-resistance RTD bridges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2384IDR | 7µA IQ, 160kHz GBW, 0.5mV VOS - higher speed and lower offset but 2.4× higher current draw. | Better for higher-bandwidth sensor interfaces (e.g., ultrasonic flow meters), less suitable for multi-year battery life targets. | Select when bandwidth >100kHz is required and supply headroom permits 7µA/channel. |
| OPA4347UA | 20µA IQ, 350kHz GBW, 2mV VOS - wider supply range (2.3V–5.5V) but 6.9× higher quiescent current. | Preferred for mixed-signal systems with 3.3V logic rails and moderate power budgets, not for sub-µA sleep modes. | Choose when driving heavier capacitive loads (>100pF) or requiring faster settling in 12-bit ADC interfaces. |
Compared with TLV2384IDR and OPA4347UA, the OPA4379AIPWR uniquely balances nanoscale quiescent current (2.9µA) with rail-to-rail operation down to 1.8V and low 1/f noise - making it irreplaceable in decade-long battery-powered deployments where every nanoamp matters.
Availability
OPA4379AIPWR is available at Aetrix Electronics and suitable for portable medical diagnostics, handheld test equipment, and battery-powered industrial sensors requiring stable component supply across extended product lifecycles.
Supply support for OPA4379AIPWR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The OPA379 family - including OPA4379AIPWR - was designed specifically for ultra-low-power, precision signal conditioning in battery-constrained applications such as portable instrumentation and remote environmental monitors.
FAQ
What is the maximum capacitive load the OPA4379AIPWR can drive stably in unity-gain configuration?
The OPA4379AIPWR is stable with capacitive loads up to 30pF in unity-gain follower configuration, as verified in the Typical Characteristics section (Figure 17). For loads exceeding 30pF, a 10Ω–20Ω series resistor between the output and load restores stability without degrading DC accuracy - a technique validated in Figure 21 of the OPA4379AIPWR datasheet.
Does the OPA4379AIPWR support true rail-to-rail input common-mode range?
Yes, the OPA4379AIPWR supports rail-to-rail input common-mode voltage from (V–) – 0.1V to (V+) + 0.1V, confirmed in the Electrical Characteristics table. This allows direct interfacing with sensors whose output spans the full supply range, though CMRR degrades above (V+) – 1V due to input stage transition effects.
What is the thermal resistance θJA for the OPA4379AIPWR in its TSSOP-14 package?
The junction-to-ambient thermal resistance (θJA) for the OPA4379AIPWR in the TSSOP-14 (PW) package is 150°C/W, as specified in the Electrical Characteristics table. This value assumes standard JEDEC 2-layer board conditions and guides thermal design for continuous operation at maximum ambient temperature.
Can the OPA4379AIPWR operate from a single 1.8V supply while maintaining rail-to-rail output swing?
Yes, the OPA4379AIPWR is fully specified at 1.8V supply and delivers rail-to-rail output swing within 10mV of each rail under 25kΩ load, as documented in the Output Voltage Swing specification. This capability is essential for maximizing dynamic range in energy-harvesting and coin-cell-powered systems.
How does the input bias current of the OPA4379AIPWR affect high-impedance sensor interfaces?
The OPA4379AIPWR features ±5pA (max) input bias current, enabling accurate amplification of signals from high-impedance sources like pH electrodes or piezoresistive pressure sensors without significant voltage drop across source impedances up to 100MΩ - a key advantage over higher-IB alternatives in precision analog front-ends.
OPA4379AIPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- 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 (x4 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:
- 14-TSSOP
OPA4379AIPWR FAQ
1.How can I place an order for OPA4379AIPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4379AIPWR 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 OPA4379AIPWR reliable?
The price and inventory of OPA4379AIPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4379AIPWR is usually 5 days.
3.What payment methods are accepted for OPA4379AIPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4379AIPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4379AIPWR?
OPA4379AIPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4379AIPWR 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 OPA4379AIPWR?
For technical support, including OPA4379AIPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4379AIPWR requirements.
6.How does Aetrix verify that OPA4379AIPWR is sourced from the original manufacturer or authorized distributors?
All OPA4379AIPWR 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 OPA4379AIPWR meets industry standards.
7.What is the process for return or replacement of OPA4379AIPWR?
All OPA4379AIPWR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4379AIPWR, 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 OPA4379AIPWR part is unused and in its original packaging.
Return procedure for OPA4379AIPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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