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Texas Instruments OPA364AIDR
- Part No.:
- OPA364AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA364AIDR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,250
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Product details
Overview
OPA364AIDR from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation (1.8 V to 5.5 V). It delivers 7 MHz gain-bandwidth, 5 V/µs slew rate, and 90 dB typical CMRR, with 500 µV maximum input offset voltage and 750 µA maximum quiescent current per channel - enabling precision signal conditioning in battery-powered microphone preamplifiers and sensor interfaces.
For engineers reviewing the OPA364AIDR datasheet, OPA364AIDR pinout, OPA364AIDR application, or OPA364AIDR equivalent, key selection criteria include its rail-to-rail I/O swing within 10 mV of supply rails, 1.8-V minimum operation, shutdown-free 5-pin SOT-23 package, and verified performance driving SAR ADCs without linearity degradation.
Technical Context
The OPA364AIDR employs a complementary CMOS input stage that eliminates crossover distortion, delivering consistent 90 dB CMRR across frequency and enabling high-fidelity amplification of small-signal sources like electret microphones without THD degradation. Its unity-gain stable architecture supports direct connection to ADC inputs with minimal external components.
Unlike the pin-compatible OPA363 family, the OPA364AIDR omits shutdown functionality - confirmed by absence of Enable pin in its 5-pin SOT-23 (DBV) configuration and explicit device comparison table. Input common-mode range extends from (V–) – 0.1 V to (V+) + 0.1 V, and output swings to within 10 mV of both rails at 25°C with 10 kΩ load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8 V to 5.5 V single supply - enables direct interface with Li-ion, coin-cell, and 3.3 V logic systems without level-shifting. |
| Gain-Bandwidth Product | 7 MHz - supports stable unity-gain buffer configurations and active filter designs up to ~100 kHz with <1% gain error. |
| Slew Rate | 5 V/µs - ensures faithful reproduction of 1 Vpp signals up to ~800 kHz without slew-induced distortion. |
| Input Offset Voltage | ≤500 µV max - reduces DC error in precision sensor front-ends, minimizing calibration burden in production. |
| CMRR | 90 dB typical - rejects common-mode noise from shared power rails or EMI-coupled traces in mixed-signal PCBs. |
| Quiescent Current | 750 µA max per channel - allows continuous operation in always-on audio monitoring nodes with sub-1 mA total system budget. |
| Output Swing | Within 10 mV of rails (V– and V+) - maximizes dynamic range when interfacing with 12-bit+ SAR ADCs referenced to same supply. |
Pinout & Package
OPA364AIDR is packaged in a 5-pin SOT-23 (DBV) case measuring 2.60 mm × 1.60 mm, optimized for space-constrained portable electronics. No thermal pad or exposed die attach; standard reflow profile compatible.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output (VOUT) | Amplified signal source node; drives ADC input, active filter stage, or transimpedance feedback path. |
| 2 | Negative Supply (V–) | Reference ground for single-supply operation; must be connected to system GND or lowest potential rail. |
| 3 | Noninverting Input (+IN) | High-impedance (≥10¹³ Ω) node for reference or sensor signal; accepts common-mode voltages down to V– – 0.1 V. |
| 4 | Inverting Input (–IN) | High-impedance feedback node; used in inverting amplifier, transimpedance, or differential configurations. |
| 5 | Positive Supply (V+) | Main power input; supports 1.8–5.5 V; decoupling capacitor (0.1 µF) required within 2 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Output swings to within 10 mV of V– and V+; input common-mode includes both supply rails - preserves full ADC code utilization. |
| No phase reversal | Guaranteed stable behavior during overdrive or input common-mode excursion beyond rails - prevents latch-up in transient conditions. |
| Low input bias current | ±1 pA typical at 25°C - minimizes voltage error across high-value feedback resistors (>1 MΩ) in sensor amplifiers. |
| Unity-gain stable | Operates reliably with gain = 1 without external compensation - simplifies layout and reduces BOM count in buffer applications. |
| Industrial temp range | Specified from –40°C to +125°C - qualified for under-hood automotive sensors, industrial IoT nodes, and outdoor metering. |
Applications
| Electret Microphone Preamplifier | Portable Gas Sensor Signal Chain |
|---|---|
|
Use Scenario: Amplifying weak AC-coupled output (10–100 mVpp) from electret condenser microphones in voice-activated edge devices. IC Role / Device Role / Timing Role: Single-supply, noninverting amplifier with gain = 100, DC-blocking input cap, and rail-to-rail output driving 12-bit SAR ADC. Use Value: 7-MHz bandwidth captures full audio spectrum (20 Hz–20 kHz); 500 µV offset avoids clipping on low-level speech; 750 µA IQ extends battery life in always-listening mode. |
Use Scenario: Conditioning low-current (nA–µA) output from electrochemical gas sensors in handheld air quality monitors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting sensor current to voltage, followed by low-pass filtering before ADC sampling. Use Value: ±1 pA input bias current prevents significant offset error across 10 MΩ feedback resistor; rail-to-rail output maximizes dynamic range into 3.3 V ADC reference. |
| Medical Pulse Oximeter Analog Front-End | Industrial Temperature Transmitter |
|
Use Scenario: Amplifying photodiode current signals (modulated red/IR LED) in wearable pulse oximeters powered by coin cells. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with matched gain paths for ratiometric SpO₂ calculation. Use Value: 90 dB CMRR rejects common-mode noise from switching LED drivers; 1.8 V operation enables direct use of CR2032 (3 V) with LDO dropout margin. |
Use Scenario: Buffering and scaling output of RTD or thermistor bridges in 4–20 mA loop-powered temperature transmitters. IC Role / Device Role / Timing Role: Rail-to-rail input/output voltage follower isolating bridge from ADC while maintaining accuracy across –40°C to +85°C ambient. Use Value: 500 µV max offset contributes <0.1°C error in 100 Ω Pt100 measurement; –40°C to +125°C rating covers extended industrial operating envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA363AIDBVR | Includes dedicated Enable pin (pin 5); shutdown current <1 µA; otherwise identical specs and pinout except pin function mapping. | Required where system-level power gating is needed (e.g., intermittent sensing), but adds complexity if always-on operation suffices. | Select OPA363AIDBVR only when active shutdown control is mandatory; OPA364AIDR simplifies design when continuous operation is acceptable. |
| MCP6001T-E/OT | Lower GBW (1 MHz), higher offset (1.5 mV max), wider supply range (1.8–6.0 V); SOT-23-5 pinout matches OPA364AIDR. | Suitable for cost-sensitive, lower-performance applications (e.g., basic voltage monitoring) where 7-MHz bandwidth is unnecessary. | Choose MCP6001T-E/OT for budget-limited designs with relaxed speed/accuracy requirements; OPA364AIDR preferred for audio or precision sensor front-ends. |
Compared with OPA363AIDBVR, OPA364AIDR removes shutdown overhead for simpler biasing and lower risk of enable-line noise coupling; versus MCP6001T-E/OT, it delivers 7× higher bandwidth and 3× lower offset - critical for fidelity in microphone and medical signal chains.
Availability
OPA364AIDR is available at Aetrix Electronics and suitable for electret microphone preamplifiers, portable gas sensor interfaces, and medical pulse oximeter analog front-ends requiring stable component supply across automotive, industrial, and consumer product lifecycles.
Supply support for OPA364AIDR 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 low-power signal chain solutions.
The OPA364AIDR belongs to TI's OPAx364 rail-to-rail I/O op amp family, designed specifically for high-fidelity, low-voltage signal conditioning in battery-powered and space-constrained applications - emphasizing CMRR integrity, low noise, and wide supply flexibility.
FAQ
What is the maximum supply voltage for OPA364AIDR?
The OPA364AIDR supports a maximum supply voltage of 5.5 V across the V+ to V– terminals, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent damage. For reliable long-term performance, TI recommends staying within the Recommended Operating Conditions range of 1.8 V to 5.5 V, with derating advised near thermal limits.
Does OPA364AIDR have a shutdown pin?
No, the OPA364AIDR does not include a shutdown pin. It is a 5-pin device (V+, V–, +IN, –IN, VOUT) in SOT-23 package, with no Enable or Shutdown terminal. This distinguishes it from the OPA363AIDBVR, which uses a 6-pin SOT-23 to accommodate the Enable function. The OPA364AIDR draws 750 µA maximum quiescent current continuously.
What is the input common-mode voltage range for OPA364AIDR?
The input common-mode voltage range for OPA364AIDR is specified as (V–) – 0.1 V to (V+) + 0.1 V, meaning it fully includes both supply rails - a defining feature of rail-to-rail input operation. This allows direct connection to sensors or signal sources referenced to ground or V+ without level-shifting circuitry, even at 1.8 V supply.
Can OPA364AIDR drive capacitive loads?
Yes, the OPA364AIDR can drive moderate capacitive loads, with typical characterization performed at CL = 100 pF. Data sheet figures show stable step response and <1% overshoot under these conditions. For loads >200 pF, TI recommends adding a small series resistor (10–50 Ω) between amplifier output and capacitance to maintain phase margin and prevent oscillation.
Is OPA364AIDR unity-gain stable?
Yes, the OPA364AIDR is explicitly specified as unity-gain stable in the data sheet's Detailed Description section. It requires no external compensation when configured as a voltage follower or in any closed-loop gain ≥1 configuration, simplifying design and reducing component count in buffer and gain-stage applications.
OPA364AIDR 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:
- 5V/µs
- Gain Bandwidth Product:
- 7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 1.8 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
OPA364AIDR FAQ
1.How can I place an order for OPA364AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA364AIDR 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 OPA364AIDR reliable?
The price and inventory of OPA364AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA364AIDR is usually 5 days.
3.What payment methods are accepted for OPA364AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA364AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA364AIDR?
OPA364AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA364AIDR 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 OPA364AIDR?
For technical support, including OPA364AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA364AIDR requirements.
6.How does Aetrix verify that OPA364AIDR is sourced from the original manufacturer or authorized distributors?
All OPA364AIDR 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 OPA364AIDR meets industry standards.
7.What is the process for return or replacement of OPA364AIDR?
All OPA364AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA364AIDR, 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 OPA364AIDR part is unused and in its original packaging.
Return procedure for OPA364AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA364AIDR Tags
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