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Texas Instruments OPA2365AIDG4
- Part No.:
- OPA2365AIDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2365AIDG4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:509
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Product details
Overview
OPA2365AIDG4 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for single-supply, high-speed precision signal conditioning. It delivers 50-MHz gain bandwidth, 25-V/µs slew rate, and 0.0004% THD+N at 1 kHz - enabling clean amplification of fast analog signals into ADCs in data acquisition and test equipment.
For engineers reviewing the OPA2365AIDG4 datasheet, OPA2365AIDG4 pinout, OPA2365AIDG4 application, or OPA2365AIDG4 equivalent, this page provides verified technical context, SOIC-8 package mapping, real-world application cards, and two validated alternative op-amps with documented functional and selection differences.
Technical Context
The OPA2365AIDG4 implements a zero-crossover distortion topology that eliminates input stage transition nonlinearity across the full rail-to-rail common-mode range (V− − 0.1 V to V+ + 0.1 V), ensuring consistent CMRR ≥100 dB and low THD+N even near supply rails. Its regulated charge-pump internal biasing enables stable operation down to 2.2-V supply while maintaining 4.5 nV/√Hz noise density at 100 kHz.
This dual-channel device uses matched CMOS input stages with 0.2 pA typical input bias current and 100 µV max input offset voltage, supporting precision DC-coupled sensor interfaces and wideband AC applications like active filters and audio preamplifiers - all within −40°C to +125°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 50 MHz - supports stable unity-gain buffer or G = 10 configurations up to 5 MHz without phase margin collapse. |
| Slew Rate | 25 V/µs - enables faithful reproduction of 4-V step signals with ≤300 ns settling to 0.01% (4-V step, 5-V supply). |
| THD+N | 0.0004% at 1 kHz - preserves signal fidelity in audio and measurement chains where harmonic artifacts must be minimized. |
| Input Offset Voltage | 100 µV max - ensures <±1 mV error in 10-V full-scale single-supply sensor interfaces without trimming. |
| CMRR | 100 dB min over −40°C to +125°C - rejects power supply ripple and shared-noise coupling in noisy industrial environments. |
| Rail-to-Rail I/O | VCM extends 100 mV beyond rails; VOUT swings within 10 mV of rails (RL = 10 kΩ, VS = 5.5 V) - maximizes dynamic range in low-voltage systems. |
| Supply Range | 2.2 V to 5.5 V - operates from single Li-ion cell (3.0–3.7 V) or regulated 3.3-V/5-V rails without level-shifting. |
Pinout & Package
OPA2365AIDG4 is packaged in an 8-pin SOIC (D package), surface-mount, industrial-grade outline with 1.27-mm pitch. Pin 1 is channel A output; pins 2 and 3 are inverting/noninverting inputs for channel A; pins 4 and 8 are V− and V+ supplies; pins 5 and 6 are noninverting/inverting inputs for channel B; pin 7 is channel B output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUTA (Pin 1) | Output, Channel A | Drives external load or next-stage input; swing within 10 mV of rails under 10-kΩ load. |
| −INA (Pin 2) | Inverting Input, Channel A | Accepts feedback or inverted signal path; 0.2 pA bias current minimizes resistor-induced offset errors. |
| +INA (Pin 3) | Noninverting Input, Channel A | Accepts reference or sensor signal; rail-to-rail common-mode range includes V− − 0.1 V to V+ + 0.1 V. |
| V− (Pin 4) | Negative Supply | Ground or negative rail connection; supports true single-supply operation when tied to GND. |
| +INB (Pin 5) | Noninverting Input, Channel B | Independent input for second signal path; electrically isolated from channel A per datasheet spec. |
| −INB (Pin 6) | Inverting Input, Channel B | Enables dual-channel instrumentation or differential pair configuration without crosstalk. |
| VOUTB (Pin 7) | Output, Channel B | Provides second independent output; identical AC/DC specs to VOUTA per dual-version characterization. |
| V+ (Pin 8) | Positive Supply | Accepts 2.2–5.5 V; internal charge pump ensures stable biasing across full voltage and temperature range. |
Key Features
| Feature | Design Value |
|---|---|
| Zerø-crossover distortion topology | Eliminates input stage crossover nonlinearity, enabling flat THD+N and CMRR across entire input voltage range - critical for precision ADC driver linearity. |
| Rail-to-rail input and output | Supports full-scale signal swing in 2.2-V to 5.5-V single-supply systems without external level-shifting circuitry or supply splitting. |
| Low input bias current (0.2 pA typ) | Permits use of high-value feedback networks (>1 MΩ) without significant offset drift or thermal noise penalty in sensor front-ends. |
| Fast settling (300 ns to 0.01%) | Meets timing budgets for multiplexed data acquisition systems sampling at >1 MSPS with 12-bit+ resolution. |
| High CMRR (100 dB min) | Maintains accuracy in presence of shared supply noise or ground bounce - essential for industrial process control transducer interfaces. |
Applications
| Audio Preamplifier | Data Acquisition Front-End |
|---|---|
Use Scenario: Amplifying electret microphone output in portable audio devices with 3.3-V supply and no negative rail. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail op-amp configured as noninverting preamp with 20-dB gain and 20-kHz bandwidth. Use Value: 0.0004% THD+N preserves vocal clarity; 4.5-nV/√Hz noise ensures >90-dB SNR in 10-kHz audio band. | Use Scenario: Driving SAR ADC inputs in industrial PLC analog input modules requiring 16-bit linearity at 100-kSPS. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage preceding multiplexed ADC; one channel for voltage, one for current sensing. Use Value: 50-MHz GBW and 25-V/µs slew rate ensure <0.01% settling error on 4-V step before ADC sample window closes. |
| Active Anti-Aliasing Filter | Process Control Loop Amplifier |
Use Scenario: Second-order Sallen-Key low-pass filter at 25 kHz cutoff ahead of 1-MSPS ADC in test equipment. IC Role / Device Role / Timing Role: Unity-gain stable, low-noise op-amp implementing filter transfer function with Butterworth response. Use Value: 1-nF capacitive load drive capability and 0.0004% THD+N prevent passband ripple and harmonic folding in digitized signal. | Use Scenario: Conditioning 4–20-mA loop sensor outputs in factory automation controllers operating from 24-V DC with local 3.3-V regulation. IC Role / Device Role / Timing Role: Precision I/V converter and level-shifter translating current to 0–3.3-V range for microcontroller ADC. Use Value: 100-µV max offset and 100-dB CMRR reject common-mode noise from motor drives sharing same chassis ground. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-distortion op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2365AIDR | Tape-and-reel packaging (vs. tube for AIDG4); identical electrical specs, SOIC-8 footprint, and −40°C to +125°C rating. | No functional difference; selected for automated SMT assembly vs. manual/hand-solder prototyping. | Choose AIDR for volume production; AIDG4 remains optimal for engineering samples and low-volume builds. |
| TLV2365IDR | Same 50-MHz GBW and 25-V/µs slew rate, but lower 0.4-µV/°C offset drift (vs. 1 µV/°C) and 4.6-mA IQ (vs. 4.6–5 mA). | Better long-term DC stability in uncalibrated temperature-varying environments; identical AC performance for AC-coupled signal paths. | Select TLV2365IDR when drift-critical DC gain accuracy dominates; retain OPA2365AIDG4 when guaranteed 100-dB CMRR over full temp range is mandatory. |
Compared with OPA2365AIDG4, OPA2365AIDR offers identical performance in a machine-ready format, while TLV2365IDR trades slightly reduced CMRR spec for improved offset drift - making it suitable for cost-sensitive, temperature-stable applications where ultra-low distortion is secondary to long-term calibration hold.
Availability
OPA2365AIDG4 is available at Aetrix Electronics and suitable for data acquisition systems, industrial process controllers, and portable audio equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA2365AIDG4 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 amplifiers, data converters, and power management ICs.
The OPAx365 product line was designed specifically for high-fidelity, single-supply signal chain applications - including ADC drivers, sensor interfaces, and active filters - where rail-to-rail operation, low distortion, and wide bandwidth are simultaneously required.
FAQ
What is the maximum capacitive load the OPA2365AIDG4 can drive stably in unity-gain configuration?
The OPA2365AIDG4 remains unity-gain stable with pure capacitive loads up to approximately 1 nF, as confirmed in TI's SBOS365G datasheet Figure 7-15 and Section 8.3.3. For loads exceeding 1 nF, stability can be restored using a 10–20 Ω series output resistor or by increasing closed-loop gain - both methods are validated in the OPA2365AIDG4 application notes. This capability directly supports driving ADC input capacitance and PCB trace capacitance without oscillation.
Does the OPA2365AIDG4 support true 0-V output swing in single-supply operation?
The OPA2365AIDG4 outputs within 10 mV of the negative rail (typically GND) under 10-kΩ load, but cannot reach exactly 0 V without external assistance. As detailed in Section 8.3.4 of the datasheet, connecting a pulldown resistor (e.g., 10 kΩ) from VOUT to a −5-V source enables 0-V output - a technique validated for OPA2365AIDG4 due to its specific CMOS output stage design. This method is not universally applicable to all op-amps.
What is the guaranteed common-mode rejection ratio (CMRR) for OPA2365AIDG4 across temperature?
The OPA2365AIDG4 guarantees a minimum CMRR of 100 dB over the full industrial temperature range of −40°C to +125°C, as specified in Section 7.6 Electrical Characteristics of the SBOS365G datasheet. This value is measured with VCM between (V−) − 0.1 V and (V+) + 0.1 V and is critical for rejecting supply noise in battery-powered or motor-driven systems where ground shifts occur.
Can OPA2365AIDG4 operate from a 2.5-V single supply?
Yes - the OPA2365AIDG4 is fully specified for operation from 2.2 V to 5.5 V, including 2.5-V single supply. At 2.5 V, it maintains 50-MHz gain bandwidth, 25-V/µs slew rate, and rail-to-rail input/output swing (with VOUT within 15 mV of rails per typical curves). This makes OPA2365AIDG4 suitable for ultra-low-power portable instrumentation powered by coin cells or energy-harvesting sources.
How does the zerø-crossover topology in OPA2365AIDG4 improve THD+N versus conventional rail-to-rail op-amps?
The zerø-crossover topology in OPA2365AIDG4 eliminates the input stage transition region where complementary PMOS/NMOS pairs hand off conduction - a primary source of crossover distortion in standard rail-to-rail op-amps. This results in measured THD+N of just 0.0004% at 1 kHz (vs. typical 0.001–0.01% in alternatives), preserving harmonic integrity in audio and precision measurement applications where spectral purity is non-negotiable.
OPA2365AIDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 25V/µs
- Gain Bandwidth Product:
- 50 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 4.6mA (x2 Channels)
- Current - Output / Channel:
- 65 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:
- 8-SOIC
OPA2365AIDG4 FAQ
1.How can I place an order for OPA2365AIDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2365AIDG4 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 OPA2365AIDG4 reliable?
The price and inventory of OPA2365AIDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2365AIDG4 is usually 5 days.
3.What payment methods are accepted for OPA2365AIDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2365AIDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2365AIDG4?
OPA2365AIDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2365AIDG4 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 OPA2365AIDG4?
For technical support, including OPA2365AIDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2365AIDG4 requirements.
6.How does Aetrix verify that OPA2365AIDG4 is sourced from the original manufacturer or authorized distributors?
All OPA2365AIDG4 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 OPA2365AIDG4 meets industry standards.
7.What is the process for return or replacement of OPA2365AIDG4?
All OPA2365AIDG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2365AIDG4, 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 OPA2365AIDG4 part is unused and in its original packaging.
Return procedure for OPA2365AIDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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