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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments OPA365AIDR

Name: OPA365AIDR
Brand: Texas Instruments
SKU: OPA365AIDR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: OPA365AIDR

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: OPA365AIDR.pdf

Description:: IC OPAMP GP 1 CIRCUIT 8SOIC

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Product details

Overview

OPA365AIDR from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for high-speed, low-distortion signal conditioning in single-supply systems. It delivers 50-MHz gain bandwidth, 25-V/µs slew rate, and 0.0004% THD+N at 1 kHz - enabling precision driving of sampling ADCs in data acquisition and test equipment.

For engineers reviewing the OPA365AIDR datasheet, OPA365AIDR pinout, OPA365AIDR application, or OPA365AIDR equivalent, this page provides verified specifications, SOIC-8 package layout, zero-crossover distortion benefits, and validated alternatives for signal chain design, active filtering, and sensor amplification where rail-to-rail swing and wideband linearity are critical.

Technical Context

The OPA365AIDR employs a proprietary zerø-crossover input topology that eliminates the common-mode offset discontinuity found in conventional rail-to-rail CMOS op amps, ensuring monotonic V_OS across the full input range (V⁻ − 0.1 V to V⁺ + 0.1 V). This architecture sustains 100 dB minimum CMRR over temperature and supports true single-supply operation from 2.2 V to 5.5 V.

Its internal regulated charge pump enables rail-to-rail output swing within 10 mV of both rails under 10-kΩ load, while maintaining fast settling (300 ns to 0.01%) and low 4.5 nV/√Hz voltage noise at 100 kHz - characteristics essential for high-fidelity analog front-ends interfacing with 16-bit+ ADCs.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain Bandwidth	50 MHz - supports stable unity-gain operation and preserves phase margin in high-frequency closed-loop configurations up to 25 MHz.
Slew Rate	25 V/µs - enables clean 4-V step response in ≤250 ns without slewing-induced distortion in audio or pulse amplification.
THD+N	0.0004% at 1 kHz - ensures minimal harmonic corruption in precision audio and measurement signal paths.
Input Offset Voltage	100 µV (max) - reduces DC error in sensor interfaces and active filter DC gain stages without trimming.
CMRR	100 dB (min) - maintains accuracy in noisy industrial environments where common-mode interference exceeds 100 mV.
Rail-to-Rail I/O	V_CM = V⁻ − 0.1 V to V⁺ + 0.1 V; V_OUT swings to within 10 mV of rails - maximizes dynamic range in 3.3-V or 5-V single-supply systems.
Supply Range	2.2 V to 5.5 V - compatible with Li-ion, USB, and logic-supply domains without level-shifting circuitry.

Pinout & Package

OPA365AIDR is packaged in an 8-pin SOIC (D package), with pins 1, 5, and 8 designated as no-connect (NC) terminals. The device uses standard SOIC-8 footprint (5.3 mm × 6.2 mm, 1.27 mm pitch) and supports reflow soldering per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
1	NC	No internal connection - must be left floating or tied to ground; not used for thermal or EMI mitigation.
2	−IN	Inverting input - accepts differential signals referenced to V_CM; supports input beyond rails by ±100 mV.
3	+IN	Noninverting input - high-impedance CMOS node (0.2 pA bias current); defines reference point for buffer/gain configurations.
4	V−	Negative supply rail - connects to system ground in single-supply use; must be decoupled with ≥0.1 µF ceramic capacitor.
5	NC	No internal connection - electrically isolated; no routing or grounding required.
6	VOUT	Analog output - drives capacitive loads ≤1 nF stably in unity gain; requires series resistor for larger C_L.
7	V+	Positive supply rail - accepts 2.2–5.5 V; internal charge pump derives boosted bias for rail-to-rail output stage.
8	NC	No internal connection - unused terminal; no effect on performance if left unconnected.

Key Features

Feature	Design Value
Zerø-crossover input topology	Eliminates input-stage crossover distortion, delivering monotonic offset behavior and >100 dB CMRR across full rail-to-rail input range.
Rail-to-rail input and output	Enables full-scale signal utilization in 3.3-V systems: input accepts V⁻ − 0.1 V to V⁺ + 0.1 V; output swings to within 10 mV of either rail.
Low 4.5 nV/√Hz noise at 100 kHz	Preserves SNR in wideband sensor amplifiers and preamp stages feeding 1 MSPS+ ADCs without requiring external filtering.
0.3 µs settling to 0.01%	Meets timing budgets for multiplexed data acquisition systems sampling at ≥1 MHz with 12-bit+ resolution.
High 100 dB CMRR (min)	Rejects power-supply ripple and board-level noise in industrial control loops and process monitoring circuits.

Applications

Audio Signal Conditioning	Data Acquisition Front-End
Use Scenario: Low-noise preamplification of electret microphones and line-level audio sources in portable instrumentation. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail op amp configured as noninverting gain stage (G = 10) with 20-kHz Sallen-Key anti-aliasing filter. Use Value: 0.0004% THD+N and 4.5 nV/√Hz noise preserve fidelity across 20 Hz–20 kHz band; rail-to-rail swing maximizes headroom on 3.3-V supply.	Use Scenario: Driving SAR or sigma-delta ADC inputs in multi-channel sensor hubs and PLC analog input modules. IC Role / Device Role / Timing Role: High-speed buffer between precision sensor signal and ADC sample-and-hold, operating at 1 MSPS with 0.01% settling. Use Value: 300 ns settling to 0.01% and 50-MHz GBW ensure accurate capture of fast transients; CMOS input avoids loading high-Z sensor outputs.
Active Filter Design	Process Control Loop Amplifier
Use Scenario: Implementation of 500-kHz Butterworth low-pass filters in test equipment signal generators and spectrum analyzers. IC Role / Device Role / Timing Role: MFB topology op amp with 50-MHz GBW and 25-V/µs slew rate to maintain phase linearity and transient response. Use Value: Zero-crossover topology prevents distortion at filter cutoff; rail-to-rail output ensures full dynamic range in 5-V systems.	Use Scenario: Current-loop transmitter output stage and feedback amplifier in 4–20 mA industrial transmitters. IC Role / Device Role / Timing Role: Precision gain block with low offset (100 µV max) and high CMRR (100 dB min) for stable loop regulation under EMI. Use Value: Input common-mode range extending 100 mV beyond rails accommodates sensor fault conditions; 2.2-V min supply supports low-power field devices.

Audio Signal Conditioning

Data Acquisition Front-End

Use Scenario: Low-noise preamplification of electret microphones and line-level audio sources in portable instrumentation.

IC Role / Device Role / Timing Role: Single-supply, rail-to-rail op amp configured as noninverting gain stage (G = 10) with 20-kHz Sallen-Key anti-aliasing filter.

Use Value: 0.0004% THD+N and 4.5 nV/√Hz noise preserve fidelity across 20 Hz–20 kHz band; rail-to-rail swing maximizes headroom on 3.3-V supply.

Use Scenario: Driving SAR or sigma-delta ADC inputs in multi-channel sensor hubs and PLC analog input modules.

IC Role / Device Role / Timing Role: High-speed buffer between precision sensor signal and ADC sample-and-hold, operating at 1 MSPS with 0.01% settling.

Use Value: 300 ns settling to 0.01% and 50-MHz GBW ensure accurate capture of fast transients; CMOS input avoids loading high-Z sensor outputs.

Active Filter Design

Process Control Loop Amplifier

Use Scenario: Implementation of 500-kHz Butterworth low-pass filters in test equipment signal generators and spectrum analyzers.

IC Role / Device Role / Timing Role: MFB topology op amp with 50-MHz GBW and 25-V/µs slew rate to maintain phase linearity and transient response.

Use Value: Zero-crossover topology prevents distortion at filter cutoff; rail-to-rail output ensures full dynamic range in 5-V systems.

Use Scenario: Current-loop transmitter output stage and feedback amplifier in 4–20 mA industrial transmitters.

IC Role / Device Role / Timing Role: Precision gain block with low offset (100 µV max) and high CMRR (100 dB min) for stable loop regulation under EMI.

Use Value: Input common-mode range extending 100 mV beyond rails accommodates sensor fault conditions; 2.2-V min supply supports low-power field devices.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, rail-to-rail operational amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
OPA365AIDBVR	SOT-23-5 package (5-pin), identical electrical specs, higher R_θJA (206.9°C/W vs 140.1°C/W).	Better suited for space-constrained PCBs; thermal derating required above 25 mW dissipation.	Select OPA365AIDBVR only when board area is critical and thermal management allows.
TLV365IDR	Same CMOS architecture, lower 0.4 µV/°C offset drift (vs 1 µV/°C), identical 50-MHz GBW and 4.5-nV/√Hz noise.	Enhanced DC stability over temperature; same AC performance - ideal for long-duration sensor logging.	Choose TLV365IDR when offset drift dominates system error budget over −40°C to +125°C.

Compared with OPA365AIDR, OPA365AIDBVR offers identical AC performance in a smaller footprint but requires tighter thermal design, while TLV365IDR improves DC drift by 60% without sacrificing speed or noise - making it preferable for wide-temperature industrial sensing.

Availability

OPA365AIDR is available at Aetrix Electronics and suitable for data acquisition systems, test equipment, audio signal chains, and industrial process control requiring stable component supply across extended temperature ranges (−40°C to +125°C).

Supply support for OPA365AIDR 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 innovation in precision amplifiers and data converters.

The OPA365AIDR belongs to TI's high-speed, zero-crossover op amp product line, designed specifically for single-supply, wideband signal conditioning in ADC driver, active filter, and sensor interface applications demanding low distortion and rail-to-rail operation.

FAQ

What is the maximum capacitive load the OPA365AIDR can drive stably in unity-gain configuration?

The OPA365AIDR remains stable with pure capacitive loads up to 1 nF in unity-gain (G = +1) configuration, as confirmed by overshoot testing in Figure 7-15 of the datasheet. For loads exceeding 1 nF, a 10–20 Ω series resistor at the output is recommended to restore phase margin. This technique trades minor gain error (e.g., 0.2% with 10-kΩ load) for stability - a verified design practice documented in Section 8.3.3 of the OPA365AIDR datasheet.

Does the OPA365AIDR support true 0-V output in single-supply operation?

The OPA365AIDR cannot reach exactly 0 V with standard single-supply connections due to CMOS output stage limitations, but achieves output within 10 mV of the negative rail (V−). To reach 0 V or slightly below, TI's Application Note SBOS365G Section 8.3.4 specifies adding a pulldown resistor (e.g., 10 kΩ to −5 V) to sink ~500 µA - a method validated for OPA365AIDR and explicitly enabled by its output-stage design.

What is the guaranteed common-mode rejection ratio (CMRR) for OPA365AIDR over temperature?

The OPA365AIDR guarantees a minimum CMRR of 100 dB over the full operating temperature range of −40°C to +125°C, as specified in Section 7.6 Electrical Characteristics. This value is measured under conditions of (V−) − 0.1 V ≤ V_CM ≤ (V+) + 0.1 V and reflects consistent rejection of power-supply and board-level noise across automotive and industrial environments.

Can OPA365AIDR operate from a 2.5-V supply, and what performance changes occur?

Yes, OPA365AIDR is fully specified from 2.2 V to 5.5 V, including at 2.5 V. At this supply, quiescent current drops to ~4.5 mA (per Figure 7-10), GBW remains 50 MHz, and output swing stays rail-to-rail (within 10 mV), though slew rate decreases slightly to ~22 V/µs. All key parameters - THD+N, CMRR, and offset - retain their datasheet min/max limits per Section 7.3 Recommended Operating Conditions.

How does the zerø-crossover topology in OPA365AIDR improve performance versus conventional rail-to-rail op amps?

The zerø-crossover topology in OPA365AIDR eliminates the input offset voltage discontinuity typical of complementary-input-stage op amps, resulting in monotonic V_OS behavior across the entire common-mode range (Figure 8-1). This directly enables superior linearity in ADC driver applications, maintains 100 dB CMRR at rail extremes, and removes crossover-induced distortion artifacts that degrade THD+N in audio and precision measurement circuits.

OPA365AIDR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 1

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

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

OPA365AIDR FAQ

1.How can I place an order for OPA365AIDR through Aetrix?

Please submit a Request for Quotation (RFQ) for OPA365AIDR 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 OPA365AIDR reliable?

The price and inventory of OPA365AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA365AIDR is usually 5 days.

3.What payment methods are accepted for OPA365AIDR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA365AIDR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for OPA365AIDR?

OPA365AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your OPA365AIDR 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 OPA365AIDR?

For technical support, including OPA365AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA365AIDR requirements.

6.How does Aetrix verify that OPA365AIDR is sourced from the original manufacturer or authorized distributors?

All OPA365AIDR 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 OPA365AIDR meets industry standards.

7.What is the process for return or replacement of OPA365AIDR?

All OPA365AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA365AIDR, 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 OPA365AIDR part is unused and in its original packaging.

Return procedure for OPA365AIDR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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