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Texas Instruments OPA375IDCKT
- Part No.:
- OPA375IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA375IDCKT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:729
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Product details
Overview
OPA375IDCKT from Texas Instruments is a single-channel, rail-to-rail output CMOS operational amplifier optimized for precision low-noise signal conditioning in space-constrained applications. It delivers 3.5 nV/√Hz input voltage noise, 10-MHz gain bandwidth, ±500-µV maximum input offset voltage, and operates from 2.25 V to 5.5 V supply - enabling high-fidelity photodiode amplification and ADC driver stages in wearable medical sensors.
For engineers reviewing the OPA375IDCKT datasheet, OPA375IDCKT pinout, OPA375IDCKT application, or OPA375IDCKT equivalent, key selection criteria include its ultra-low broadband noise floor, unity-gain stability with capacitive loads up to 100 pF, RRO swing within 10 mV of rails at 10-kΩ load, and robust EMI rejection (51 dB at 1 GHz) critical for mixed-signal PCBs in portable instrumentation.
Technical Context
The OPA375IDCKT employs a CMOS input stage with <10 pA input bias current, supporting high-impedance sensor interfaces like photodiodes and piezoresistive elements. Its resistive open-loop output impedance enables stable operation into >100-pF capacitive loads without external compensation - a key differentiator versus conventional voltage-feedback op amps.
It integrates an RFI/EMI rejection filter and features no phase reversal during overdrive, ensuring reliable behavior in transient-rich environments such as industrial sensor transmitters and audio front-ends. The device is specified across –40°C to +125°C and exhibits ±0.16 µV/°C offset drift, making it suitable for uncalibrated precision systems requiring long-term DC stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 10 MHz - supports stable closed-loop gain ≥10 at 1 MHz or G=1 with ≤100-pF load without peaking. |
| Input Voltage Noise Density | 3.5 nV/√Hz at 10 kHz - enables sub-µV signal resolution in 100-kHz bandwidth sensor channels. |
| Max Input Offset Voltage | ±500 µV - eliminates need for manual nulling in 12-bit ADC driver applications with 2.5-V reference. |
| Rail-to-Rail Output Swing | Within 10 mV of rails (VS = 5.5 V, RL = 10 kΩ) - maximizes dynamic range in single-supply 3.3-V systems. |
| Quiescent Current | 890 µA per channel - allows battery-powered operation >1 year in low-duty-cycle sensor nodes (e.g., 10-µA avg). |
| Supply Voltage Range | 2.25 V to 5.5 V - compatible with Li-ion, coin-cell, and regulated 3.3-V/5-V rails without level-shifting. |
| Input Offset Drift | ±0.16 µV/°C - contributes <1.2 µV error over 75°C ambient shift, sufficient for Class I medical sensor accuracy. |
Pinout & Package
The OPA375IDCKT is housed in a 5-pin SC70 package (1.25 mm × 2.00 mm), optimized for high-density PCB layouts in portable electronics. Thermal resistance RθJA is 240.9°C/W, requiring minimal copper pour for operation at full 125°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: +IN | Noninverting input | High-impedance CMOS node (10 GΩ || 6 pF); accepts signals from high-Z sources (e.g., pH electrodes). |
| 2: V– | Negative supply / ground | Reference for single-supply operation; must be connected directly to PCB ground plane for EMI immunity. |
| 3: –IN | Inverting input | Differential pair input; matched to +IN for <100-µV CMRR degradation up to 100 kHz. |
| 4: OUT | Amplifier output | Rail-to-rail capable; drives 10-kΩ loads to within 10 mV of rails; stable with ≥100-pF capacitive loads. |
| 5: V+ | Positive supply | Accepts 2.25–5.5 V; internal regulation ensures consistent IQ and GBW across voltage range. |
Key Features
| Feature | Design Value |
|---|---|
| Low broadband noise | 3.5 nV/√Hz at 10 kHz enables 16-bit-equivalent SNR in 100-kHz sensor bandwidths without external filtering. |
| Unity-gain stable | No external compensation required - simplifies layout and reduces BOM count in gain-of-1 buffer applications. |
| Integrated RFI/EMI filter | 51-dB rejection at 1 GHz prevents RF rectification artifacts in cellular/Wi-Fi coexistence environments. |
| No phase reversal on overdrive | Prevents latch-up or erroneous control signals when inputs exceed common-mode range - critical for fault-tolerant designs. |
| 2-kV HBM ESD rating | Survives handling without special precautions; eliminates need for external TVS diodes in Class A assembly lines. |
Applications
| Photodiode Amplifier | Precision ADC Driver |
|---|---|
Use Scenario: Converting weak current from silicon photodiodes (e.g., pulse oximetry) into amplified voltage for digitization. IC Role / Device Role / Timing Role: Transimpedance amplifier with 10-MHz bandwidth and 3.5-nV/√Hz noise floor to preserve optical signal integrity. Use Value: Enables detection of sub-nA photocurrents with >80-dB dynamic range, eliminating post-amplifier noise floor penalties. |
Use Scenario: Driving SAR or delta-sigma ADC inputs while maintaining linearity and settling within 1.2 µs to 0.01%. IC Role / Device Role / Timing Role: Unity-gain buffer isolating high-impedance sensor outputs from ADC sampling capacitance. Use Value: Achieves 0.00035% THD+N at 1 kHz, preserving ENOB >14 bits in 16-bit data acquisition systems. |
| Sensor Field Transmitter | Wearable Consumer Health |
Use Scenario: Conditioning analog outputs from industrial pressure/temperature sensors for 4–20-mA loop transmission. IC Role / Device Role / Timing Role: Precision gain stage with ±0.16 µV/°C drift, operating from 3.3-V supply in harsh ambient (-40°C to +85°C). Use Value: Reduces calibration frequency by 3× versus standard op amps, lowering field maintenance cost. |
Use Scenario: Front-end amplification for ECG/PPG biosensors in compact earbuds or wristbands. IC Role / Device Role / Timing Role: Low-power, low-noise signal conditioner in 2.25-V coin-cell powered devices with strict size constraints. Use Value: SC70 footprint saves >60% board area vs SOIC-8 alternatives while delivering medical-grade signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDCKT | Zero-drift architecture (0.02 µV/°C drift), lower offset (10 µV max), but 350-kHz GBW and higher 17-nV/√Hz noise. | Better for DC-critical, low-frequency (<10 kHz) applications like strain gauge bridges; unsuitable for 10-MHz ADC buffering. | Select OPA333AIDCKT only when ultra-low drift dominates over bandwidth and noise requirements. |
| MCP6001UT-I/OT | Lower cost, 1-MHz GBW, 22-nV/√Hz noise, 1.8–6.0-V supply, but ±3-mV offset and no EMI filter. | Acceptable for non-precision consumer audio or basic sensor interfaces where SNR >60 dB suffices. | Choose MCP6001UT-I/OT for cost-sensitive, non-medical, non-industrial applications with relaxed accuracy specs. |
Compared with OPA333AIDCKT and MCP6001UT-I/OT, the OPA375IDCKT uniquely balances 10-MHz bandwidth, 3.5-nV/√Hz noise, and rail-to-rail output in a 5-pin SC70 - making it the only option among the three that meets simultaneous requirements for high-speed precision sensing and ultra-compact packaging.
Availability
OPA375IDCKT is available at Aetrix Electronics and suitable for photodiode amplifiers, precision ADC driver stages, and wearable health sensor front-ends requiring stable component supply across automotive, industrial, and medical OEM programs.
Supply support for OPA375IDCKT 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 op amp design heritage and broad manufacturing scale.
The OPA375IDCKT belongs to TI's precision op amp portfolio, engineered specifically for low-noise, wide-bandwidth signal conditioning in battery-powered and space-constrained instrumentation - bridging performance between general-purpose and ultra-precision amplifiers.
FAQ
What is the maximum capacitive load the OPA375IDCKT can drive while remaining stable?
The OPA375IDCKT is unity-gain stable and can drive ≥100-pF capacitive loads without external compensation, as verified in Figure 7-25 of the SBOS886E datasheet. This capability stems from its resistive open-loop output impedance and internal compensation - enabling direct connection to ADC input capacitors, long traces, or LCD bias networks without risk of oscillation.
Does the OPA375IDCKT support true single-supply operation down to 2.25 V?
Yes, the OPA375IDCKT is fully specified for single-supply operation from 2.25 V to 5.5 V, with rail-to-rail output swing, input common-mode range extending to V–, and guaranteed performance across –40°C to +125°C. At 2.25 V, it maintains 10-MHz GBW and 890-µA quiescent current, making it ideal for coin-cell or energy-harvesting systems.
How does the OPA375IDCKT's EMI rejection benefit real-world designs?
The OPA375IDCKT integrates an on-chip RFI/EMI rejection filter providing 51 dB attenuation at 1 GHz, preventing RF-induced errors in wireless-enabled devices. In practice, this eliminates audible buzz in audio preamps near Bluetooth modules and avoids false triggers in medical PPG sensors operating alongside 2.4-GHz transceivers - without requiring external ferrite beads or LC filters.
Is the OPA375IDCKT pin-compatible with other SC70 op amps like the OPA344 or TLV2761?
No - the OPA375IDCKT uses a non-standard SC70-5 pinout (V– on Pin 2, +IN on Pin 1) that differs from industry-common variants. For example, the TLV2761 places V+ on Pin 5 and V– on Pin 2 but swaps +IN/–IN positions. Direct replacement requires PCB redesign; always verify pin functions using Table 6-1 in SBOS886E before substitution.
What is the typical input bias current of the OPA375IDCKT, and why does it matter?
The OPA375IDCKT exhibits ±10 pA typical input bias current at 25°C, enabled by its CMOS input stage. This ultra-low value minimizes voltage error across high-impedance sources (e.g., >100-MΩ pH electrodes or photodiodes in photovoltaic mode), preserving signal integrity where even 1-nA leakage would induce >100-mV offset - a critical advantage over bipolar-input op amps.
OPA375IDCKT 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:
- 4.75V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 pA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 890µA
- Current - Output / Channel:
- 68 mA
- Voltage - Supply Span (Min):
- 2.25 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
OPA375IDCKT FAQ
1.How can I place an order for OPA375IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA375IDCKT 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 OPA375IDCKT reliable?
The price and inventory of OPA375IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA375IDCKT is usually 5 days.
3.What payment methods are accepted for OPA375IDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA375IDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA375IDCKT?
OPA375IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA375IDCKT 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 OPA375IDCKT?
For technical support, including OPA375IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA375IDCKT requirements.
6.How does Aetrix verify that OPA375IDCKT is sourced from the original manufacturer or authorized distributors?
All OPA375IDCKT 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 OPA375IDCKT meets industry standards.
7.What is the process for return or replacement of OPA375IDCKT?
All OPA375IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA375IDCKT, 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 OPA375IDCKT part is unused and in its original packaging.
Return procedure for OPA375IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA375IDCKT Tags
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