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Texas Instruments OPA364IDR
- Part No.:
- OPA364IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA364IDR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,507
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Product details
Overview
OPA364IDR from Texas Instruments is a single, 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 ±10 mV output swing from rails at 25°C and 500 µV maximum input offset voltage. It is widely used in electret microphone preamplifiers and sensor signal conditioning in battery-powered industrial and portable systems.
For engineers reviewing the OPA364IDR datasheet, OPA364IDR pinout, OPA364IDR application, or OPA364IDR equivalent, key selection criteria include its 7-MHz bandwidth under 1.8-V operation, rail-to-rail I/O capability enabling full dynamic range utilization in 3.3-V and lower ADC interfaces, low 750 µA/channel quiescent current for extended battery life, and guaranteed performance across –40°C to +125°C.
Technical Context
The OPA364IDR employs a complementary CMOS input stage that eliminates crossover distortion and ensures monotonic common-mode response - critical for driving SAR and delta-sigma ADCs without degrading differential linearity or THD. Its unity-gain stable architecture supports direct use in active filters, transimpedance amplifiers, and precision buffer configurations without external compensation.
No shutdown function is integrated; the OPA364IDR is a 5-pin variant (vs. 6-pin OPA363 with enable), confirming fixed-operation design. Input bias current remains ultra-low (±1 pA typ at 25°C), and input voltage noise is 17 nV/√Hz at 10 kHz - enabling high-impedance sensor interfacing with minimal added noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct integration into 2-cell Li-ion, 3.3-V, and 1.8-V logic domains without level-shifting. |
| Gain-Bandwidth Product | 7 MHz - supports stable closed-loop gain ≥10 up to ~700 kHz, suitable for anti-aliasing and audio-band filtering. |
| Slew Rate | 5 V/µs - ensures ≤1 µs settling to 0.1% for 4-V steps, meeting timing requirements of fast data acquisition systems. |
| Input Offset Voltage | ≤500 µV - reduces DC error in precision gain stages, minimizing calibration burden in sensor front-ends. |
| CMRR | 90 dB typical - rejects power supply ripple and shared-noise coupling in mixed-signal PCB layouts. |
| Quiescent Current | 750 µA/channel max - allows continuous operation in always-on IoT nodes with multi-year battery life at µA-level system budgets. |
| Output Swing | Within 10 mV of rails (RL = 10 kΩ) - maximizes usable dynamic range when interfacing with 12-bit+ ADCs referenced to same supply. |
Pinout & Package
OPA364IDR is packaged in a 5-pin SOT-23 (DBV) with 2.60 mm × 1.60 mm body size and standard lead pitch. The package supports reflow soldering per JEDEC J-STD-020 and is rated for operation from –40°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT | Output | Amplified, buffered analog output node; capable of sourcing/sinking ±20 mA (short-circuit limited). |
| 2 - V– | Negative Supply | Lowest potential rail; tied to ground in single-supply configurations; must be decoupled with 0.1 µF ceramic capacitor. |
| 3 - +IN | Noninverting Input | High-impedance (≥10¹³ Ω) CMOS input; accepts common-mode voltages from V– – 0.1 V to V+ + 0.1 V. |
| 4 - –IN | Inverting Input | Differential input node; matched to +IN for optimal CMRR; sensitive to layout-induced parasitic capacitance imbalance. |
| 5 - V+ | Positive Supply | Highest potential rail; supplies internal bias circuitry and output stage; requires local 0.1 µF + 1 µF bulk decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Enables full-scale signal handling in 1.8-V systems - e.g., preserves 0–1.8 V sensor output range without clipping or level-shifting. |
| No Phase Reversal | Prevents catastrophic output inversion during input overdrive - essential for fault-tolerant sensor monitoring circuits. |
| Ultra-Low Input Bias Current | ±1 pA typical at 25°C - avoids significant voltage drop across >1 MΩ source impedances (e.g., piezoelectric sensors, pH electrodes). |
| High CMRR Without Crossover | Maintains >74 dB CMRR across full temperature range - eliminates need for trimming in precision instrumentation amplifiers. |
| Unity-Gain Stable | Operates reliably with no external compensation in buffer, inverter, or follower configurations - simplifies layout and BOM. |
Applications
| Electret Microphone Preamplifier | Industrial Temperature Sensor Interface |
|---|---|
Use Scenario: Amplifying weak AC-coupled signals from electret condenser microphones in voice-controlled edge devices. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail op-amp configured as noninverting amplifier with gain ≥100, biased via resistor divider. Use Value: 17 nV/√Hz input noise and 7-MHz bandwidth preserve speech fidelity up to 4 kHz while rejecting 50/60 Hz hum via high CMRR. | Use Scenario: Conditioning output from PT100 RTD or thermistor bridges in factory-floor temperature monitors. IC Role / Device Role / Timing Role: Precision instrumentation front-end amplifier with matched feedback resistors and low-offset DC gain stage. Use Value: ≤500 µV offset and 3 µV/°C drift minimize calibration frequency; rail-to-rail output drives 16-bit SAR ADC directly from 3.3-V supply. |
| Portable Medical Pulse Oximeter Analog Front-End | Automotive Cabin Air Quality Sensor Signal Chain |
Use Scenario: Amplifying low-amplitude, modulated photodiode currents in wearable pulse oximeters powered by coin cells. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) stage converting nanoamp photocurrents to voltage, followed by AC-coupled gain. Use Value: 1 pA input bias current prevents baseline shift in high-gain TIA; 750 µA quiescent current extends battery runtime beyond 72 hours. | Use Scenario: Signal conditioning for NDIR CO₂ or VOC sensors in automotive HVAC control modules operating across –40°C to +105°C. IC Role / Device Role / Timing Role: Low-drift, rail-to-rail buffer and filter driver preceding sigma-delta ADC in ASIL-B compliant subsystems. Use Value: Guaranteed –40°C to +125°C operation and 90 dB CMRR suppress engine-bay EMI; no phase reversal prevents false fault triggers during transient overloads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Zero-drift architecture; 0.02 µV/°C offset drift vs. OPA364IDR's 3 µV/°C; higher 350-kHz GBW but lower 1.6-V min supply. | Better for <100-Hz DC-coupled precision measurement; less suitable for audio-band or fast-settling applications. | Select OPA333AIDBVR when sub-µV offset stability over temperature is mandatory; choose OPA364IDR for wider bandwidth and lower cost in AC-coupled or moderate-precision roles. |
| MCP6001T-I/OT | Lower 1-MHz GBW and 0.6 V/µs slew rate; 100 µA quiescent current; only 2.7–5.5 V supply range - no 1.8-V operation. | Targeted at ultra-low-power, low-bandwidth sensor buffers where 1.8-V compatibility is not required. | Choose MCP6001T-I/OT for sub-100-µA system budgets where bandwidth <100 kHz suffices; retain OPA364IDR for 1.8-V support, 7-MHz speed, and industrial temp range. |
Compared with OPA333AIDBVR and MCP6001T-I/OT, the OPA364IDR uniquely balances 1.8-V operation, 7-MHz bandwidth, rail-to-rail I/O, and –40°C to +125°C qualification - making it the optimal choice for cost-sensitive, battery-powered industrial and portable signal chains requiring both speed and wide supply flexibility.
Availability
OPA364IDR is available at Aetrix Electronics and suitable for electret microphone preamplifiers, industrial temperature sensor interfaces, and portable medical device analog front-ends requiring stable component supply across automotive, industrial, and consumer production programs.
Supply support for OPA364IDR 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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The OPA364IDR belongs to TI's precision rail-to-rail op-amp product line, engineered specifically for low-voltage, single-supply signal conditioning in battery-constrained and wide-temperature environments - emphasizing bandwidth-efficiency, CMRR integrity, and robustness without shutdown complexity.
FAQ
What is the minimum supply voltage required for reliable operation of the OPA364IDR?
The OPA364IDR operates reliably down to 1.8 V (±0.9 V) as specified in its Recommended Operating Conditions. At this voltage, it maintains 7 MHz gain-bandwidth, rail-to-rail I/O swing, and 90 dB CMRR. Operation below 1.8 V is not characterized and may result in degraded bandwidth, increased offset, or failure to meet datasheet specifications. Always verify performance at 1.8 V in final application conditions.
Does the OPA364IDR include a shutdown pin or power-down mode?
No, the OPA364IDR does not include a shutdown pin or power-down mode. It is the 5-pin SOT-23 variant of the OPA36x family, whereas the pin-compatible OPA363IDBVR adds a sixth enable pin for shutdown (drawing <1 µA/channel). The OPA364IDR draws 750 µA/channel continuously and must be powered off externally if zero-quiescent-current sleep is required.
Can the OPA364IDR drive a 100-pF capacitive load without instability?
Yes, the OPA364IDR is unity-gain stable and characterized to drive ≥100 pF loads, as confirmed by small-signal step response testing in the datasheet (Figure 19). For optimal phase margin and minimal overshoot, keep PCB trace capacitance low and place a 0.1 µF ceramic decoupling capacitor within 2 mm of the V+ and V– pins. Avoid long traces to high-capacitance nodes like ADC inputs unless isolation resistance is added.
What is the maximum output current capability of the OPA364IDR?
The OPA364IDR provides short-circuit output current of ±20 mA (typical) per the Absolute Maximum Ratings table, with thermal limiting protecting the device. Under normal linear operation with RL = 10 kΩ, output swing remains within 10 mV of rails. For sustained loads >5 mA, verify junction temperature using RθJA = 182.7°C/W (SOT-23) and ambient conditions to avoid exceeding 125°C TJ max.
Is the OPA364IDR suitable for driving the input of a 12-bit SAR ADC operating from a 3.3-V supply?
Yes, the OPA364IDR is well-suited for driving 12-bit SAR ADCs from a 3.3-V supply. Its rail-to-rail output swings within 10 mV of 0 V and 3.3 V, delivering >3.28 V of usable range - sufficient for 12-bit resolution (≈0.8 mV LSB). Combined with 90 dB CMRR and low 17 nV/√Hz noise, it preserves SNR and minimizes code spread due to amplifier-induced errors.
OPA364IDR 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:
- 500 µV
- 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
OPA364IDR FAQ
1.How can I place an order for OPA364IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA364IDR 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 OPA364IDR reliable?
The price and inventory of OPA364IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA364IDR is usually 5 days.
3.What payment methods are accepted for OPA364IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA364IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA364IDR?
OPA364IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA364IDR 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 OPA364IDR?
For technical support, including OPA364IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA364IDR requirements.
6.How does Aetrix verify that OPA364IDR is sourced from the original manufacturer or authorized distributors?
All OPA364IDR 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 OPA364IDR meets industry standards.
7.What is the process for return or replacement of OPA364IDR?
All OPA364IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA364IDR, 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 OPA364IDR part is unused and in its original packaging.
Return procedure for OPA364IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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