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Texas Instruments OPA377AIDCKR
- Part No.:
- OPA377AIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA377AIDCKR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:5,084
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Product details
Overview
OPA377AIDCKR from Texas Instruments is a single, rail-to-rail output CMOS operational amplifier optimized for low-voltage, single-supply operation (2.2V to 5.5V), featuring 5.5MHz gain-bandwidth product, 7.5nV/√Hz input voltage noise at 1kHz, and ultra-low 0.2pA typical input bias current - ideal for photodiode preamplification in precision sensor interfaces.
For engineers reviewing the OPA377AIDCKR datasheet, OPA377AIDCKR pinout, OPA377AIDCKR application, or OPA377AIDCKR equivalent, this page delivers verified specifications, SC70-5 package layout, real-world use cases in piezoelectric sensing and active filtering, and two validated alternative op amps with documented functional trade-offs.
Technical Context
The OPA377AIDCKR employs a unity-gain-stable CMOS input stage with EMI input filtering (–3dB at ~75MHz) and rail-to-rail output swing within 10–20mV of supply rails. Its input common-mode range extends 100mV beyond both rails, supporting true single-supply signal conditioning down to 2.2V.
It delivers low distortion (0.00027% THD+N at 1kHz), fast settling (1.6ms to 0.1%), and stable capacitive load drive up to 250pF in unity-gain configuration - enabled by internal compensation and output isolation design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5.5MHz - supports stable closed-loop gain ≥1 with bandwidth up to 5.5MHz for audio and anti-aliasing filter applications. |
| Input Voltage Noise Density | 7.5nV/√Hz at 1kHz - enables high-fidelity amplification of low-level signals from photodiodes or piezoelectric sensors without significant noise degradation. |
| Input Bias Current | ±0.2pA (typ) - minimizes voltage error in high-impedance transducer interfaces (e.g., >1GΩ feedback networks). |
| Supply Voltage Range | 2.2V to 5.5V - allows direct battery operation (e.g., single Li-ion or dual alkaline) without regulation, reducing system power overhead. |
| Quiescent Current | 0.76mA per amplifier - balances performance and power efficiency for portable instrumentation and always-on sensor nodes. |
| Rail-to-Rail Output | Swings within 10mV of rails (RL = 10kΩ) - maximizes dynamic range in low-voltage ADC driver stages. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive under-hood environments without derating. |
Pinout & Package
OPA377AIDCKR is housed in a 5-pin SC70 package (DCK), measuring 2.0mm × 2.1mm × 0.9mm, with moisture sensitivity level (MSL) 2–260°C/1 year and lead finish NiPdAu/Sn.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Output | Amplified signal source capable of driving 10kΩ loads to within 10mV of supply rails; limited short-circuit current (±30/–50mA). |
| 2 (IN–) | Inverting Input | Differential input node with 6.5pF differential capacitance; clamped to rails via internal diodes - requires ≤10mA input current limiting if overdriven. |
| 3 (V–) | Negative Supply / Ground Reference | Return path for supply current and output stage; thermal die connection recommended to this pin for improved thermal performance. |
| 4 (IN+) | Non-Inverting Input | High-impedance CMOS input (0.2pA IB) with 13pF common-mode capacitance; supports common-mode voltages from (V–) – 0.1V to (V+) + 0.1V. |
| 5 (V+) | Positive Supply | Primary power input; accepts 2.2V–5.5V; requires 0.1µF bypass capacitor placed adjacent to pin for stable high-frequency operation. |
Key Features
| Feature | Design Value |
|---|---|
| EMI Input Filtering | Integrated low-pass filter with ~75MHz –3dB cutoff reduces rectification-induced offset shifts from RF interference in noisy industrial environments. |
| Unity-Gain Stability | No external compensation required - simplifies PCB layout for buffer, gain-of-1, or active filter configurations without risk of oscillation. |
| Low Input Offset Drift | 0.32µV/°C max dVOS/dT - maintains accuracy across wide temperature ranges without recalibration in embedded sensor systems. |
| Wide Common-Mode Range | Extends 100mV beyond both supply rails - enables accurate amplification of signals referenced to mid-supply or ground in single-supply topologies. |
| Capacitive Load Drive | Stable with up to 250pF pure capacitive load in unity-gain mode - eliminates need for external isolation resistors in ADC driver or cable-driving applications. |
Applications
| Photodiode Preamplifier | Piezoelectric Sensor Preamplifier |
|---|---|
Use Scenario: Amplifying weak current from reverse-biased photodiodes in optical smoke detectors or spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier with >1GΩ feedback resistor, leveraging 0.2pA input bias current to minimize dark-current error. Use Value: Enables sub-picoamp current resolution and 7.5nV/√Hz noise floor for high-sensitivity light detection. |
Use Scenario: Conditioning high-impedance charge output from vibration or pressure piezoelectric elements in predictive maintenance sensors. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance voltage follower or integrator front-end, operating from 2.2V coin-cell supply. Use Value: Preserves signal integrity with <0.00027% THD+N and rail-to-rail output swing for full-scale ADC utilization. |
| Sensor Signal Conditioning | Active Filter (Anti-Aliasing) |
Use Scenario: Amplifying and level-shifting millivolt-level outputs from RTDs, thermocouples, or strain gauges in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with 1mV max offset and 90dB CMRR, configured for single-supply operation at 3.3V. Use Value: Delivers 112dB open-loop gain and 0.32µV/°C drift stability for <0.1% total error over –40°C to +85°C. |
Use Scenario: Implementing 50kHz 2nd-order Butterworth low-pass filter ahead of 16-bit ADCs like ADS8327 in data acquisition systems. IC Role / Device Role / Timing Role: Unity-gain buffer and filter integrator with 5.5MHz GBW and 2V/ms slew rate ensuring minimal phase distortion. Use Value: Achieves maximally flat frequency response and <2µs settling time for accurate sampling at 250kSPS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDCKR | Zero-drift architecture (0.02µV/°C offset drift), lower 17µV max offset, but reduced 350kHz GBW and higher 17µA IQ. | Better for µV-level DC precision (e.g., weigh scales), less suitable for >100kHz signal chains or low-power battery operation. | Select OPA333AIDCKR when long-term DC stability outweighs bandwidth and quiescent current requirements. |
| MCP6001UT-E/OT | Lower cost CMOS op amp with 1MHz GBW, 100pA IB, 6.5µV/°C drift, and 100µA IQ - no EMI filtering or specified 125°C operation. | Appropriate for cost-sensitive consumer-grade signal conditioning where EMI immunity and extended temperature range are not critical. | Choose MCP6001UT-E/OT only for commercial-temp, non-safety-critical designs where budget constraints dominate performance needs. |
Compared with OPA377AIDCKR, OPA333AIDCKR trades bandwidth and power for superior DC precision, while MCP6001UT-E/OT sacrifices EMI resilience, temperature range, and noise performance for cost reduction - making OPA377AIDCKR the balanced choice for industrial sensor front-ends requiring robustness, speed, and low-noise fidelity.
Availability
OPA377AIDCKR is available at Aetrix Electronics and suitable for photodiode preamplification, piezoelectric sensor interfacing, and active anti-aliasing filter design requiring stable component supply across industrial, test & measurement, and portable instrumentation programs.
Supply support for OPA377AIDCKR 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 over 50 years of innovation in precision amplifiers and signal chain ICs.
The OPA377 family was designed specifically for low-voltage, single-supply sensor signal conditioning - emphasizing low noise, ultra-low input bias current, and rail-to-rail output in miniature packages for space-constrained industrial and portable systems.
FAQ
What is the maximum capacitive load the OPA377AIDCKR can drive stably in unity-gain configuration?
The OPA377AIDCKR can directly drive up to 250pF of pure capacitive load while maintaining stability in unity-gain configuration, as confirmed in TI's SBOS504B datasheet Figure 15. Exceeding this value may cause overshoot or ringing; for larger loads, a 10Ω–20Ω series resistor at the output (as shown in Figure 24) restores stability without compromising DC accuracy.
Does the OPA377AIDCKR support operation from a 2.2V single supply?
Yes, the OPA377AIDCKR is fully specified for operation from 2.2V to 5.5V single supply, including all key parameters (GBW, noise, offset, CMRR) across –40°C to +125°C. Its rail-to-rail output and extended common-mode input range (to V– – 0.1V and V+ + 0.1V) enable reliable functionality even at minimum supply voltage.
What is the input bias current specification for OPA377AIDCKR over temperature?
The OPA377AIDCKR has a typical input bias current of ±0.2pA at +25°C, with maximum values of ±10pA over the full –40°C to +125°C range, as stated in the Electrical Characteristics table of SBOS504B. The typical curve in Figure 11 shows IB remains below 100pA up to +125°C.
Is the OPA377AIDCKR pin-compatible with other members of the OPA377 family?
No - the OPA377AIDCKR uses the 5-pin SC70 (DCK) package, while the SO-8 version (e.g., OPA377AID) has different pinout and footprint. Pin compatibility exists only within identical package variants; cross-package substitution requires PCB redesign and validation of thermal and layout effects.
What does the "AIDCKR" suffix indicate in OPA377AIDCKR?
The "AIDCKR" suffix identifies the specific packaging and ordering variant: "AI" denotes enhanced manufacturing flow, "DCK" specifies the SC70-5 package per TI's package designator system, and "R" indicates tape-and-reel packaging (3000 units per reel), as confirmed in TI's Package Option Addendum.
OPA377AIDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 5.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 250 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
OPA377AIDCKR FAQ
1.How can I place an order for OPA377AIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA377AIDCKR 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 OPA377AIDCKR reliable?
The price and inventory of OPA377AIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA377AIDCKR is usually 5 days.
3.What payment methods are accepted for OPA377AIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA377AIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA377AIDCKR?
OPA377AIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA377AIDCKR 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 OPA377AIDCKR?
For technical support, including OPA377AIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA377AIDCKR requirements.
6.How does Aetrix verify that OPA377AIDCKR is sourced from the original manufacturer or authorized distributors?
All OPA377AIDCKR 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 OPA377AIDCKR meets industry standards.
7.What is the process for return or replacement of OPA377AIDCKR?
All OPA377AIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA377AIDCKR, 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 OPA377AIDCKR part is unused and in its original packaging.
Return procedure for OPA377AIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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