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Texas Instruments OPA376AIDCKRG4
- Part No.:
- OPA376AIDCKRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA376AIDCKRG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,634
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Product details
Overview
OPA376AIDCKRG4 from Texas Instruments is a precision rail-to-rail input/output operational amplifier optimized for low-noise, low-quiescent-current signal conditioning in battery-powered and high-resolution data acquisition systems. It delivers 7.5 nV/√Hz input voltage noise at 1 kHz, 5 μV typical offset voltage, 5.5-MHz gain-bandwidth product, and operates from 2.2 V to 5.5 V single supply - enabling high-accuracy ADC buffering in handheld test equipment and medical sensors.
For engineers reviewing the OPA376AIDCKRG4 datasheet, OPA376AIDCKRG4 pinout, OPA376AIDCKRG4 application, or OPA376AIDCKRG4 equivalent, key selection criteria include its e-trim™-enabled dc precision (25 μV max offset), 760 μA typical quiescent current, 0.8 μVPP 0.1–10 Hz noise, rail-to-rail swing within 20 mV of rails (at 10 kΩ), and SC70-5 package compatibility with space-constrained layouts.
Technical Context
The OPA376AIDCKRG4 uses TI's e-trim™ process to achieve factory-trimmed dc performance, minimizing input offset voltage drift (0.26 μV/°C typ) and enabling stable operation across –40°C to +125°C. Its CMOS input stage provides ultra-low input bias current (0.2 pA typ) and high common-mode rejection (90 dB min), supporting high-impedance sensor interfaces without significant error.
This device features unity-gain stability and drives up to 250 pF capacitive loads directly; internal ESD protection (±4 kV HBM) and robust PSRR (100 dB min) ensure reliability in unregulated battery systems. The 2-V/μs slew rate and 1.6 μs settling time to 0.1% support fast, accurate sampling in SAR ADC front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 5.5 MHz - supports stable closed-loop gain ≥1 with bandwidth sufficient for 16-bit ADC sampling up to ~500 kSPS. |
| Input Offset Voltage | 5 μV (typ), 25 μV (max) - enables sub-16-bit error contribution in 24-bit sensor signal chains without calibration. |
| Voltage Noise Density | 7.5 nV/√Hz at 1 kHz - ensures minimal added noise in precision instrumentation amplifiers and active filters. |
| Quiescent Current | 760 μA (typ), 950 μA (max) - allows continuous operation in coin-cell-powered devices for >1 year at 100 μA avg load. |
| Supply Voltage Range | 2.2 V to 5.5 V - powers directly from single Li-ion, two alkaline cells, or regulated 3.3 V rails without LDO overhead. |
| Input Common-Mode Range | (V–) – 0.1 V to (V+) + 0.1 V - accepts signals beyond rails for fault-tolerant industrial I/O and sensor diagnostics. |
| Output Voltage Swing | Within 20 mV of rails (RL = 10 kΩ, TA = 25°C) - maximizes dynamic range in single-supply 16-bit+ data converters. |
Pinout & Package
OPA376AIDCKRG4 is packaged in a 5-pin SC70 (DCK) footprint measuring 2.00 mm × 1.25 mm, optimized for high-density portable PCBs. Thermal resistance is RθJA = 267.0°C/W, requiring minimal copper pour for ambient operation up to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 1) | Inverting input terminal | Non-inverting input node; accepts rail-to-rail common-mode signals; 13 pF common-mode capacitance limits HF bandwidth in high-Z sources. |
| –IN (Pin 3) | Inverting input terminal | Inverting input node; differential capacitance of 6.5 pF requires careful layout to avoid instability with stray capacitance. |
| OUT (Pin 4) | Amplifier output | Capable of driving 250 pF directly; series 10–20 Ω resistor recommended for >250 pF loads to suppress ringing without degrading dc accuracy. |
| V+ (Pin 5) | Positive supply | Accepts 2.2–5.5 V; PSRR >100 dB ensures immunity to supply ripple in noisy battery-fed systems. |
| V– (Pin 2) | Negative supply / ground reference | Typically connected to system ground; internal ESD diodes clamp inputs to V– ±0.5 V - external current limiting required for overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| e-trim™ DC precision | Factory-trimmed offset (5 μV typ) and drift (0.26 μV/°C typ) eliminate need for system-level calibration in medical and test gear. |
| Rail-to-rail I/O | Full-swing input and output enable maximum signal utilization in 3.3 V and lower single-supply systems - critical for battery runtime extension. |
| Low 0.1–10 Hz noise | 0.8 μVPP integrated noise supports high-resolution DC measurements in weigh scales and thermopile amplifiers without chopper artifacts. |
| High PSRR & CMRR | 100 dB PSRR and 90 dB CMRR maintain accuracy in mixed-signal PCBs with switching regulators and shared analog/digital grounds. |
| Space-saving SC70-5 | 2.0 × 1.25 mm footprint reduces board area by >50% vs SOIC-8 - ideal for wearable biosensors and compact DMM modules. |
Applications
| ADC Buffer | Medical Instrumentation |
|---|---|
Use Scenario: Driving the input of a 16-bit SAR ADC (e.g., ADS8327) in a portable blood glucose meter. IC Role / Device Role / Timing Role: Precision buffer isolating sensor transducer from ADC sampling kickback; maintains linearity during 500 kSPS conversions. Use Value: 7.5 nV/√Hz noise and 1.6 μs settling ensure <0.5 LSB error in 16-bit conversion; rail-to-rail swing preserves full-scale range on 3.3 V supply. |
Use Scenario: Amplifying low-amplitude EEG signals from dry electrodes in a wireless neuro-monitoring headset. IC Role / Device Role / Timing Role: First-stage gain and filtering element in analog front-end; rejects electrode half-cell potential drift. Use Value: 0.2 pA input bias current prevents polarization errors; 0.8 μVPP 0.1–10 Hz noise enables detection of <1 μV neural spikes without averaging. |
| Handheld Test Equipment | Active Filtering |
Use Scenario: Input stage of a battery-powered handheld DMM measuring microvolt-level thermocouple outputs. IC Role / Device Role / Timing Role: Low-drift, low-noise preamplifier with programmable gain; compensates for cold-junction temperature drift. Use Value: 25 μV max offset and 0.32 μV/°C drift over –40°C to +125°C reduce calibration frequency; 760 μA IQ extends battery life to >20 hours. |
Use Scenario: Second-order Butterworth anti-aliasing filter preceding a 24-bit delta-sigma ADC in an industrial vibration sensor. IC Role / Device Role / Timing Role: Unity-gain stable active filter with 50 kHz cutoff; rejects out-of-band mechanical noise while preserving phase linearity. Use Value: 5.5 MHz GBW and 2 V/μs slew rate support sharp roll-off without peaking; rail-to-rail output avoids clipping on transient shocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDCKR | Zero-drift architecture; 0.1 μV max offset, but higher 17 nV/√Hz noise and 550 kHz GBW. | Better for ultra-low-offset DC apps (e.g., strain gauges); unsuitable for >100 kHz signal conditioning due to bandwidth limit. | Select OPA333AIDCKR only when offset drift dominates noise budget and bandwidth ≤50 kHz. |
| MCP6V81T-E/OT | Auto-zero design; 2 μV max offset, 11 nV/√Hz noise, 10 MHz GBW, but 1.6 mA IQ - 2.1× higher than OPA376AIDCKRG4. | Higher speed and lower offset, but incompatible with ultra-low-power designs where <1 mA total system current is mandatory. | Choose MCP6V81T-E/OT when 10 MHz bandwidth is required and battery capacity permits higher quiescent draw. |
Compared with OPA333AIDCKR and MCP6V81T-E/OT, the OPA376AIDCKRG4 uniquely balances 7.5 nV/√Hz noise, 5.5 MHz bandwidth, and 760 μA quiescent current - making it optimal for portable 16–24-bit data acquisition where power, speed, and noise must coexist.
Availability
OPA376AIDCKRG4 is available at Aetrix Electronics and suitable for handheld test equipment, medical instrumentation, and active filtering applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production lots.
Supply support for OPA376AIDCKRG4 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 amplifiers and signal-chain solutions.
The OPA376AIDCKRG4 belongs to TI's e-trim™ precision op-amp product line, engineered specifically for high-resolution, low-power data acquisition in portable and battery-operated instrumentation.
FAQ
What is the maximum capacitive load the OPA376AIDCKRG4 can drive stably in unity-gain configuration?
The OPA376AIDCKRG4 can drive up to 250 pF of pure capacitive load stably in unity-gain configuration without external compensation. For loads exceeding 250 pF, a 10–20 Ω series resistor at the output is recommended to restore phase margin - this preserves dc accuracy while suppressing oscillation, as confirmed in TI's SBOS406G datasheet Figure 16 and Section 7.3.3.
Does the OPA376AIDCKRG4 support true rail-to-rail input and output operation?
Yes, the OPA376AIDCKRG4 supports rail-to-rail input common-mode range from (V–) – 0.1 V to (V+) + 0.1 V and rail-to-rail output swing within 20 mV of both supply rails (at RL = 10 kΩ, TA = 25°C). This is explicitly specified in the Electrical Characteristics table (Section 6.7) and enables full utilization of supply voltage in single-supply 3.3 V or lower systems.
What is the typical quiescent current of the OPA376AIDCKRG4, and how does it vary with supply voltage?
The OPA376AIDCKRG4 draws 760 μA typical quiescent current at 5.5 V supply, rising to 950 μA maximum across temperature and process. Per Figure 9 in SBOS406G, IQ remains stable between 2.2 V and 5.5 V - varying less than ±5% over that range - making it highly predictable for battery-life modeling in portable OPA376AIDCKRG4-based designs.
How does the e-trim™ technology in the OPA376AIDCKRG4 improve long-term stability compared to standard CMOS op-amps?
e-trim™ technology performs final-stage laser trimming of internal offset correction circuitry during wafer probe or final test, reducing initial offset to 5 μV typical and drift to 0.26 μV/°C typical. Unlike untrimmed or auto-zero op-amps, this eliminates post-manufacturing drift mechanisms tied to packaging stress - ensuring OPA376AIDCKRG4 maintains specification over 10+ years in medical and industrial deployments.
Is the OPA376AIDCKRG4 pin-compatible with other members of the OPA376 family, such as the SOIC-8 version?
No, the OPA376AIDCKRG4 in SC70-5 (5-pin) is not pin-compatible with the SOIC-8 (OPA376AIDR) or SOT-23-5 variants - though all share identical electrical functionality. Pin mapping differs: SC70-5 assigns +IN to Pin 1, –IN to Pin 3, OUT to Pin 4, V– to Pin 2, and V+ to Pin 5; SOIC-8 reorders these across 8 pins with NC placeholders. Layout redesign is required for package substitution.
OPA376AIDCKRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- e-trim™
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
OPA376AIDCKRG4 FAQ
1.How can I place an order for OPA376AIDCKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA376AIDCKRG4 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 OPA376AIDCKRG4 reliable?
The price and inventory of OPA376AIDCKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA376AIDCKRG4 is usually 5 days.
3.What payment methods are accepted for OPA376AIDCKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA376AIDCKRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA376AIDCKRG4?
OPA376AIDCKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA376AIDCKRG4 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 OPA376AIDCKRG4?
For technical support, including OPA376AIDCKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA376AIDCKRG4 requirements.
6.How does Aetrix verify that OPA376AIDCKRG4 is sourced from the original manufacturer or authorized distributors?
All OPA376AIDCKRG4 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 OPA376AIDCKRG4 meets industry standards.
7.What is the process for return or replacement of OPA376AIDCKRG4?
All OPA376AIDCKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA376AIDCKRG4, 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 OPA376AIDCKRG4 part is unused and in its original packaging.
Return procedure for OPA376AIDCKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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