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Texas Instruments OPA4376AQPWRQ1
- Part No.:
- OPA4376AQPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4376AQPWRQ1.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,914
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Product details
Overview
OPA4376AQPWRQ1 from Texas Instruments is a quad-channel, AEC-Q100 Grade 1 automotive-qualified precision operational amplifier featuring e-trim™ technology, 7.5 nV/√Hz input voltage noise at 1 kHz, 5 μV typical input offset voltage, 5.5 MHz gain-bandwidth product, and rail-to-rail input/output operation across 2.2 V to 5.5 V supply. It serves as a low-noise, low-quiescent-current signal conditioning front-end in battery-powered automotive power conversion and sensing circuits.
For engineers reviewing the OPA4376AQPWRQ1 datasheet, OPA4376AQPWRQ1 pinout, OPA4376AQPWRQ1 application, or OPA4376AQPWRQ1 equivalent, this page delivers verified technical context, exact pin functions for the TSSOP-14 package, real-world application mappings for BMS and motor control, and two validated alternative parts with documented functional and packaging differences.
Technical Context
The OPA4376AQPWRQ1 integrates four independent CMOS op-amps sharing a common 2.2–5.5 V supply, each with e-trim™ calibration for <25 μV max offset and <2 μV/°C drift over –40°C to +125°C. Its 760 μA typical quiescent current per channel enables always-on precision sensing without compromising battery life.
It delivers rail-to-rail input common-mode range (extending 100 mV beyond rails) and output swing within 20 mV of rails (at 10 kΩ load), supports capacitive loads up to 250 pF in unity-gain configuration, and maintains >90 dB CMRR and >120 dB open-loop gain for high-accuracy closed-loop designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - enables multi-signal conditioning (e.g., 4-phase current sensing) on single IC |
| Gain-bandwidth product | 5.5 MHz - supports stable closed-loop operation up to ~500 kHz with gain ≥11 |
| Input offset voltage (typ) | 5 μV - reduces dc error to <0.05% in 10 V full-scale measurement systems |
| Input voltage noise density | 7.5 nV/√Hz at 1 kHz - preserves SNR in sensor interfaces with bandwidths up to 100 kHz |
| Quiescent current per channel | 760 μA - allows continuous operation in 12 V automotive systems with <3.7 mW total dissipation |
| Supply voltage range | 2.2 V to 5.5 V - directly interfaces with Li-ion (3.0–4.2 V) and 3.3 V/5 V logic without regulators |
| Operating temperature | –40°C to +125°C - qualified for under-hood automotive use per AEC-Q100 Grade 1 |
Pinout & Package
TSSOP-14 package (5.00 mm × 4.40 mm body size) with exposed thermal pad; 14-pin surface-mount layout optimized for thermal performance and board space efficiency in automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | Accepts analog signals up to V– – 0.1 V and V+ + 0.1 V; high-impedance node for sensor interface |
| –IN A (Pin 2) | Inverting input, Channel A | Forms feedback node in transimpedance or differential configurations; matched to +IN A for CMRR |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable; drives 10 kΩ load within 20 mV of supply rails at 25°C |
| V+ (Pin 4) | Positive supply | Connects to main system rail (2.2–5.5 V); decoupling capacitor required within 1 cm |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent input for second signal path; identical specs to Channel A |
| –IN B (Pin 6) | Inverting input, Channel B | Enables dual-channel differential amplification without cross-talk (channel separation >120 dB @ DC) |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated output stage; supports simultaneous sourcing/sinking up to ±30 mA |
| OUT C (Pin 8) | Output, Channel C | Third independent output; shares V+ and V– rails but has dedicated output driver |
| –IN C (Pin 9) | Inverting input, Channel C | Supports 3-channel parallel acquisition (e.g., 3-phase motor current monitoring) |
| +IN C (Pin 10) | Noninverting input, Channel C | Matched input pair enabling high-precision 3-channel instrumentation |
| V– (Pin 11) | Negative supply | Reference for all channels; must be connected to lowest system potential (e.g., GND or –1.1 V) |
| +IN D (Pin 12) | Noninverting input, Channel D | Fourth signal path input; enables full 4-channel analog front-end integration |
| –IN D (Pin 13) | Inverting input, Channel D | Completes quad-channel set; supports independent gain/feedback per channel |
| OUT D (Pin 14) | Output, Channel D | Final output stage; fully specified for rail-to-rail swing and 2 V/μs slew rate |
Key Features
| Feature | Design Value |
|---|---|
| e-trim™ precision calibration | Factory-trimmed input offset voltage ≤25 μV (max) and drift ≤2 μV/°C over full temp range |
| AEC-Q100 Grade 1 qualification | Validated for automotive operation from –40°C to +125°C ambient with full parametric spec compliance |
| Rail-to-rail I/O | Input common-mode extends 100 mV beyond supplies; output swings within 20 mV of rails at 10 kΩ |
| Low-noise architecture | 0.8 μVPP integrated noise (0.1–10 Hz) and 7.5 nV/√Hz spectral density enable µV-level signal resolution |
| Capacitive load drive | Stable with up to 250 pF in unity-gain buffer mode; supports direct connection to ADC input capacitors |
| Functional safety support | Documentation available (FIT rate, failure modes, diagnostic coverage) to aid ISO 26262 ASIL-B system design |
Applications
| Onboard Charger (OBC) Sensing | Inverter Current Monitoring |
|---|---|
|
Use Scenario: High-side and low-side shunt-based current measurement in bidirectional AC/DC and DC/DC stages of automotive onboard chargers. IC Role / Device Role / Timing Role: Quad-channel OPA4376AQPWRQ1 configures two channels as precision current-sense amplifiers (gain = 50 V/V) and two as anti-aliasing filters for 16-bit SAR ADC inputs. Use Value: 5 μV offset ensures <±0.1% current measurement error at 200 A full scale; 5.5 MHz GBW supports 200 kHz switching harmonics rejection. |
Use Scenario: Real-time phase current feedback in 3-phase traction inverters using three shunt resistors and one shared reference channel. IC Role / Device Role / Timing Role: Three OPA4376AQPWRQ1 channels condition phase currents (A/B/C), while the fourth buffers the neutral reference for common-mode rejection. Use Value: 760 μA/channel quiescent current enables continuous monitoring during vehicle standby; rail-to-rail output interfaces directly with 3.3 V ADC references. |
| Battery Management System (BMS) | DC/DC Converter Feedback |
|
Use Scenario: Cell voltage monitoring and pack current sensing in 400 V EV battery packs with distributed monitoring units. IC Role / Device Role / Timing Role: Four independent amplifiers perform simultaneous cell voltage scaling (1:250), thermistor signal conditioning, and coulomb counting integrator buffering. Use Value: 0.8 μVPP 0.1–10 Hz noise prevents false fault detection in µV-level thermistor readings; AEC-Q100 qualification ensures reliability over 15-year pack life. |
Use Scenario: Voltage mode control loop compensation and output ripple sensing in 12 V/48 V automotive DC/DC converters. IC Role / Device Role / Timing Role: One channel implements Type III compensation network; others monitor output voltage ripple and inductor current slope for adaptive control. Use Value: 5.5 MHz GBW enables fast transient response (<10 µs settling); 2 V/μs slew rate handles 100 kHz PWM edge fidelity without distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4188AQPWRQ1 | Zero-drift architecture (0.003 µV/°C drift), lower 1/f noise, but higher 7.7 nV/√Hz broadband noise and 1.3 mA IQ per channel | Better for ultra-low-drift DC measurements (e.g., strain gauge bridges); less optimal for wideband sensor signals due to higher noise | Select when long-term dc stability dominates over power or ac performance |
| LMV881QDGKRQ1 | Lower cost CMOS op-amp with 17 nV/√Hz noise, 1.2 mV offset, 1.2 MHz GBW, and 125 µA IQ per channel | Suitable for non-critical signal conditioning where 12-bit accuracy suffices; not recommended for 16+ bit data acquisition | Select when budget constraints outweigh precision requirements and supply current is critical |
Compared with OPA4376AQPWRQ1, OPA4188AQPWRQ1 trades higher quiescent current and broadband noise for near-zero drift, while LMV881QDGKRQ1 sacrifices precision and speed for cost and ultra-low power-making OPA4376AQPWRQ1 the balanced choice for AEC-Q100-compliant 16-bit automotive signal chains.
Availability
OPA4376AQPWRQ1 is available at Aetrix Electronics and suitable for onboard charger (OBC), inverter control, battery management system (BMS), and DC/DC converter applications requiring stable component supply, automotive-grade reliability, and long-term production continuity.
Supply support for OPA4376AQPWRQ1 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, with deep expertise in precision analog, automotive electronics, and functional safety infrastructure.
The OPAx376-Q1 product line targets high-accuracy, low-power signal conditioning in automotive subsystems-including battery monitoring, motor control, and charging systems-where e-trim™ precision and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum capacitive load the OPA4376AQPWRQ1 can drive stably in unity-gain configuration?
The OPA4376AQPWRQ1 can directly drive up to 250 pF of pure capacitive load while maintaining stability in unity-gain buffer configuration. This capability enables direct interfacing with sampling capacitors of high-resolution SAR ADCs without external isolation components. For loads exceeding 250 pF, a small series resistor (10–20 Ω) between the OPA4376AQPWRQ1 output and the capacitor restores phase margin without degrading dc accuracy. The device's internal compensation is optimized for this behavior, as confirmed in TI's SBOS549C datasheet Figure 6-18.
Does the OPA4376AQPWRQ1 support true rail-to-rail input common-mode voltage range?
Yes, the OPA4376AQPWRQ1 supports rail-to-rail input common-mode voltage from (V–) – 0.1 V to (V+) + 0.1 V, verified across –40°C to +125°C. Within the extended range (V–) to (V+) – 1.3 V, it maintains full CMRR (>90 dB) and low offset voltage (<25 μV). Beyond (V+) – 1.3 V, offset increases gradually, as shown in Figure 6-9 of the SBOS549C datasheet. This extended range allows direct connection to sensors operating at supply rails-such as shunt monitors referenced to battery positive-in automotive systems.
How does the e-trim™ technology in OPA4376AQPWRQ1 improve long-term reliability in automotive applications?
e-trim™ technology performs final-stage laser trimming of internal offset correction circuitry during wafer probe or final test, compensating for post-packaging stress-induced parameter shifts. This results in guaranteed input offset voltage ≤25 μV (max) and drift ≤2 μV/°C over –40°C to +125°C-critical for maintaining accuracy in engine bay environments where thermal cycling exceeds 100,000 cycles. Unlike traditional trim methods, e-trim™ avoids drift acceleration mechanisms, ensuring OPA4376AQPWRQ1 meets AEC-Q100 lifetime reliability requirements without recalibration.
What is the supply current consumption of OPA4376AQPWRQ1 at 125°C ambient temperature?
At TA = +125°C, the OPA4376AQPWRQ1 draws ≤1 mA per amplifier (≤4 mA total for all four channels), as specified in Section 6.7 of SBOS549C. This is confirmed by Figure 6-10, which shows quiescent current rising linearly from 760 μA at 25°C to 980 μA at 125°C. The 1 mA maximum ensures predictable thermal dissipation (≤22 mW total in TSSOP-14 at 5.5 V) and stable operation in high-temperature under-hood locations without derating.
Can OPA4376AQPWRQ1 be used in single-supply 3.3 V systems with input signals near ground?
Yes, OPA4376AQPWRQ1 operates reliably from 2.2 V to 5.5 V and accepts input common-mode voltages down to (V–) – 0.1 V. When V– is connected to ground in a 3.3 V system, the input range extends to –0.1 V, allowing accurate amplification of ground-referenced signals such as thermocouple outputs or shunt voltages. Its rail-to-rail output swings within 20 mV of ground, enabling full dynamic range utilization with 3.3 V ADCs. This behavior is validated across temperature in the Recommended Operating Conditions table (Section 6.3).
OPA4376AQPWRQ1 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:
- Single Ended, Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 5.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- 760µA (x4 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4376AQPWRQ1 FAQ
1.How can I place an order for OPA4376AQPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4376AQPWRQ1 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 OPA4376AQPWRQ1 reliable?
The price and inventory of OPA4376AQPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4376AQPWRQ1 is usually 5 days.
3.What payment methods are accepted for OPA4376AQPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4376AQPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4376AQPWRQ1?
OPA4376AQPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4376AQPWRQ1 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 OPA4376AQPWRQ1?
For technical support, including OPA4376AQPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4376AQPWRQ1 requirements.
6.How does Aetrix verify that OPA4376AQPWRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA4376AQPWRQ1 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 OPA4376AQPWRQ1 meets industry standards.
7.What is the process for return or replacement of OPA4376AQPWRQ1?
All OPA4376AQPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4376AQPWRQ1, 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 OPA4376AQPWRQ1 part is unused and in its original packaging.
Return procedure for OPA4376AQPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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