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Texas Instruments OPA377AIDCKT
- Part No.:
- OPA377AIDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA377AIDCKT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:777
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Product details
Overview
OPA377AIDCKT from Texas Instruments is a single-channel, 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, 0.2pA typical input bias current, and 1mV maximum offset voltage - deployed in photodiode preamplifiers, sensor signal conditioning, and audio front-ends.
For engineers reviewing the OPA377AIDCKT datasheet, OPA377AIDCKT pinout, OPA377AIDCKT application, or OPA377AIDCKT equivalent, this page delivers verified specifications, SC70-5 package terminal mapping, real-world use cases in precision analog sensing, and validated alternative options for design continuity and supply resilience.
Technical Context
The OPA377AIDCKT employs a CMOS input stage enabling ultra-low input bias current (±0.2pA typ) and high input impedance, paired with EMI input filtering (75MHz –3dB cutoff) to suppress RF rectification effects. Its unity-gain stable architecture supports direct use in buffer, inverting, and active filter configurations without external compensation.
Designed for battery-powered systems, it operates across –40°C to +125°C with rail-to-rail output swing (within 20mV of rails at 10kΩ load), low quiescent current (0.76mA/ch), and robust PSRR (≥70dB up to 100kHz), making it suitable for unregulated supply environments where supply rejection and thermal stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5.5MHz - enables stable closed-loop operation up to 100kHz with gain ≥10, supporting anti-aliasing filters for 16-bit ADCs like ADS8327. |
| Input Voltage Noise Density | 7.5nV/√Hz at 1kHz - ensures minimal added noise in low-level signal amplification, e.g., piezoelectric sensor outputs below 10mV. |
| Input Bias Current | ±0.2pA (typ) - preserves signal integrity in high-impedance sources such as photodiodes and pH electrodes without significant DC error. |
| Offset Voltage (max) | 1mV - limits initial DC error to ≤0.5% of full-scale in 200mV–2V input ranges, reducing need for system-level trimming. |
| Supply Voltage Range | 2.2V to 5.5V - allows direct operation from single Li-ion cells (3.0–4.2V) or regulated 3.3V/5V rails without LDO overhead. |
| Rail-to-Rail Output | Swings within 20mV of V+ and V− at 10kΩ - maximizes dynamic range in low-voltage data acquisition, preserving >99% of available headroom. |
| Quiescent Current | 0.76mA per channel - supports always-on sensor nodes with <1µA sleep current when combined with enable control (via external circuitry). |
Pinout & Package
OPA377AIDCKT is housed in a 5-pin SC70 package (DCK), measuring 2.0mm × 1.25mm × 0.9mm, with moisture sensitivity level (MSL) 2–260°C/1 year, lead finish NiPdAu/Sn, and tape-and-reel packaging (250 units/reel, quadrant Q1 orientation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; drives capacitive loads ≤250pF directly in unity-gain configuration. |
| 2 (IN−) | Inverting input | High-impedance CMOS node; accepts differential signals or feedback networks; protected by internal ESD diodes to rails. |
| 3 (V−) | Negative supply | Reference for output swing and bias network; thermal die pad (if present) must be connected to V− per TI layout guidance. |
| 4 (IN+) | Non-inverting input | High-impedance CMOS node; used for reference voltage buffering or sensor excitation; shares same EMI filtering as IN−. |
| 5 (V+) | Positive supply | Accepts 2.2V–5.5V; requires 0.1µF ceramic bypass capacitor placed adjacent to pin for stable high-frequency PSRR performance. |
Key Features
| Feature | Design Value |
|---|---|
| EMI Input Filtering | Integrated 75MHz low-pass filter on both inputs reduces RF-induced offset shift in noisy industrial or automotive environments. |
| Low Input Bias Current | 0.2pA typ eliminates leakage-induced errors in >1GΩ source impedances, critical for photodiode and electrochemical sensor interfaces. |
| Unity-Gain Stability | Operates stably with no external compensation in G = +1 buffer or G = –1 inverter configurations, simplifying PCB layout. |
| Rail-to-Rail Output | Delivers full output swing from V− +20mV to V+ −20mV at 10kΩ, maximizing SNR in 3.3V ADC systems with limited headroom. |
| Wide Temperature Range | Specified from –40°C to +125°C enables deployment in under-hood automotive sensors and industrial motor controllers. |
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 converting photocurrent to voltage with minimal input bias error and noise. Use Value: 0.2pA input bias current prevents saturation in high-gain (>1MΩ) transimpedance stages; 7.5nV/√Hz noise preserves signal fidelity at sub-µA levels. |
Use Scenario: Conditioning high-impedance charge output from accelerometers or ultrasonic transducers. IC Role / Device Role / Timing Role: Charge-to-voltage converter with high input impedance and low noise for micro-g resolution. Use Value: CMOS input preserves piezoelectric source integrity; rail-to-rail output ensures full utilization of 16-bit ADC input range in portable test equipment. |
| Sensor Signal Conditioning | Audio Equipment |
Use Scenario: Amplifying mV-level thermocouple or RTD bridge outputs in industrial process controllers. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end (with external resistors) for dc-coupled, low-drift gain. Use Value: 1mV max offset and 0.32mV/°C drift minimize temperature-induced calibration drift over –40°C to +125°C operating range. |
Use Scenario: Line-level buffer and active filter in portable headphone amplifiers or USB DACs. IC Role / Device Role / Timing Role: Unity-gain noninverting buffer isolating DAC output from variable headphone impedance loads. Use Value: 0.00027% THD+N at 1kHz ensures transparent audio reproduction; 2.2V–5.5V supply supports dual-role operation from USB or battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDCKT | Zero-drift architecture (0.02µV/°C drift), lower offset (10µV max), but lower GBW (350kHz) and higher IQ (17µA). | Better for dc-critical applications (e.g., weigh scales); unsuitable for >10kHz signal paths due to bandwidth limitation. | Select OPA333AIDCKT only when ultra-low drift dominates over bandwidth and noise requirements. |
| MCP6001UT-E/OT | Higher input bias current (1pA typ), lower GBW (1MHz), no EMI filtering, but lower cost and wider availability. | Adequate for general-purpose low-speed sensing; lacks RF immunity needed in industrial EMI-heavy environments. | Choose MCP6001UT-E/OT for cost-sensitive, non-EMI-critical consumer designs where 1MHz bandwidth suffices. |
Compared with OPA377AIDCKT, OPA333AIDCKT trades bandwidth and noise for near-zero drift, while MCP6001UT-E/OT sacrifices EMI immunity and precision for cost and stock availability - making OPA377AIDCKT optimal for battery-powered, noise-sensitive, wideband analog front-ends.
Availability
OPA377AIDCKT is available at Aetrix Electronics and suitable for photodiode preamplifiers, piezoelectric sensor interfaces, and portable audio equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA377AIDCKT 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 signal chain solutions.
The OPA377 family was designed for low-voltage, single-supply precision analog signal conditioning - targeting battery-powered instrumentation, medical sensors, and industrial IoT edge nodes where noise, power, and reliability are co-constrained.
FAQ
What is the maximum capacitive load the OPA377AIDCKT can drive in unity-gain configuration?
The OPA377AIDCKT can directly drive up to 250pF of pure capacitive load in unity-gain configuration without oscillation. For loads exceeding this, a 10Ω–20Ω series resistor at the output (RS) restores phase margin while maintaining DC accuracy - confirmed in TI's SBOS504B Figure 24 and Typical Characteristics section.
Does the OPA377AIDCKT support rail-to-rail input common-mode voltage?
No - the OPA377AIDCKT features rail-to-rail *output*, but its input common-mode voltage range extends only from (V−) − 0.1V to (V+) − 1.3V. It does not accept signals within 100mV of V+, limiting true rail-to-rail input capability; this is explicitly specified in the Electrical Characteristics table under "Common-Mode Voltage Range".
Is the OPA377AIDCKT pin-compatible with other members of the OPA377 family?
Yes - the OPA377AIDCKT (SC70-5) shares identical pinout with OPA377AIDBVR (SOT-23-5) and OPA377AID (SO-8), all using the standard 5-pin op amp configuration: Pin 1 = OUT, Pin 2 = IN−, Pin 3 = V−, Pin 4 = IN+, Pin 5 = V+. This enables footprint flexibility without schematic changes.
What is the thermal resistance (θJA) of the OPA377AIDCKT in SC70-5 package?
The OPA377AIDCKT in SC70-5 package has a junction-to-ambient thermal resistance (θJA) of 250°C/W, as documented in the Electrical Characteristics table. This value assumes standard JEDEC 2-layer board conditions and informs thermal design for continuous operation at maximum ambient temperature (125°C).
Does the OPA377AIDCKT include internal ESD protection, and what is its rating?
Yes - the OPA377AIDCKT integrates internal ESD protection on all pins, with Human Body Model (HBM) rating of 4000V, Charged Device Model (CDM) of 1000V, and Machine Model (MM) of 200V, per Absolute Maximum Ratings table. TI recommends standard ESD handling procedures regardless, as precision op amps remain susceptible to latent damage.
OPA377AIDCKT 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
OPA377AIDCKT FAQ
1.How can I place an order for OPA377AIDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA377AIDCKT 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 OPA377AIDCKT reliable?
The price and inventory of OPA377AIDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA377AIDCKT is usually 5 days.
3.What payment methods are accepted for OPA377AIDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA377AIDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA377AIDCKT?
OPA377AIDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA377AIDCKT 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 OPA377AIDCKT?
For technical support, including OPA377AIDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA377AIDCKT requirements.
6.How does Aetrix verify that OPA377AIDCKT is sourced from the original manufacturer or authorized distributors?
All OPA377AIDCKT 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 OPA377AIDCKT meets industry standards.
7.What is the process for return or replacement of OPA377AIDCKT?
All OPA377AIDCKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA377AIDCKT, 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 OPA377AIDCKT part is unused and in its original packaging.
Return procedure for OPA377AIDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA377AIDCKT Tags
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LM358DT
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LM358DR
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