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Texas Instruments OPA363AID
- Part No.:
- OPA363AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA363AID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,062
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Product details
Overview
OPA363AID from Texas Instruments is a single, rail-to-rail input/output CMOS operational amplifier optimized for 1.8-V to 5.5-V single-supply operation. It delivers 7-MHz gain-bandwidth, 5-V/µs slew rate, and 90-dB typical CMRR, with ±10-pA input bias current and 500-µV maximum input offset voltage. It serves as a precision signal conditioner in battery-powered sensor interfaces and microphone preamplifiers.
For engineers reviewing the OPA363AID datasheet, OPA363AID pinout, OPA363AID application, or OPA363AID equivalent, key selection considerations include its shutdown capability (enabling <1-µA quiescent current), rail-to-rail I/O swing within 10 mV of supply rails, low 750-µA/channel quiescent current at 5.5 V, and guaranteed operation from –40°C to +125°C.
Technical Context
The OPA363AID uses a complementary CMOS input stage that eliminates crossover distortion, enabling high CMRR without phase reversal - critical for driving SAR ADCs with minimal THD degradation. Its internal charge-pump topology supports rail-to-rail output swing even at 1.8-V supply.
Unlike the pin-compatible OPA364, the OPA363AID includes an active-low Enable pin (Pin 5 in SOIC-8) that reduces supply current to <1 µA per channel in shutdown mode. The device is unity-gain stable and specified across the full industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 5.5 V single supply - enables direct interface with Li-ion, coin-cell, and 3.3-V logic systems. |
| Gain-Bandwidth Product | 7 MHz - supports stable closed-loop gain up to 10× at audio and data-acquisition frequencies. |
| Input Offset Voltage | ≤500 µV (max) - ensures ≤0.01% error in 5-V full-scale sensor signal conditioning. |
| Slew Rate | 5 V/µs - allows clean 20-kHz sine-wave amplification with <0.002% THD+N at G = 1. |
| CMRR | 90 dB (typical) - rejects common-mode noise from shared ground paths in mixed-signal PCBs. |
| Quiescent Current | 750 µA/channel (max) at 5.5 V - extends battery life in portable instrumentation. |
| Shutdown Current | <1 µA/channel - enables ultra-low-power sleep modes in always-on sensing nodes. |
Pinout & Package
OPA363AID is supplied in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, rated for –40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V– (Pin 4) | Negative power supply | Reference node for single-supply operation; tied to system ground in most applications. |
| V+ (Pin 7) | Positive power supply | Accepts 1.8–5.5 V; powers internal charge pump for rail-to-rail output swing. |
| +IN (Pin 3) | Noninverting input | High-impedance CMOS node; supports DC-coupled sensor inputs down to V– – 0.1 V. |
| –IN (Pin 2) | Inverting input | Used for feedback configuration; accepts signals up to V+ + 0.1 V due to ESD clamps. |
| VOUT (Pin 6) | Amplifier output | Drives loads to within 10 mV of V– or V+; stable with ≥100-pF capacitive loads. |
| Enable (Pin 5) | Shutdown control | Active-low logic input; pulls output to high-impedance state and cuts IQ to <1 µA when high. |
| NC (Pins 1 & 8) | No internal connection | Unbonded die pads; must be left floating or grounded - no routing required. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Input common-mode range spans V– – 0.1 V to V+ + 0.1 V; output swings to within 10 mV of either rail at full load. |
| No phase reversal | Complementary input stage prevents output inversion during overdrive - avoids latch-up in closed-loop filters. |
| Low-noise performance | 10 µVPP (0.1–10 Hz) and 17 nV/√Hz @ 10 kHz - preserves SNR in electret microphone preamp stages. |
| Industrial temp range | Specified from –40°C to +125°C - suitable for under-hood automotive sensors and factory-floor PLC modules. |
| Unity-gain stable | Operates reliably at gain = 1 without external compensation - simplifies active filter and buffer designs. |
Applications
| Portable Medical Sensors | Industrial Process Transmitters |
|---|---|
|
Use Scenario: Amplifying low-level signals from thermopile or strain-gauge sensors in handheld diagnostic tools. IC Role / Device Role / Timing Role: Precision DC-coupled signal conditioner with 500-µV max offset and rail-to-rail output for full ADC utilization. Use Value: Enables 16-bit effective resolution from 24-bit sigma-delta ADCs without calibration, reducing BOM cost. |
Use Scenario: Conditioning 4–20-mA loop sensor outputs in hazardous-area field transmitters. IC Role / Device Role / Timing Role: High-CMRR input buffer rejecting ground-loop noise in 2-wire current loops. Use Value: 90-dB CMRR maintains <0.1% accuracy despite >1-V common-mode shifts across long cable runs. |
| Smart Home Audio Front-Ends | Battery-Powered Data Loggers |
|
Use Scenario: Electret microphone preamplifier in voice-controlled IoT hubs operating from 3.3-V LDOs. IC Role / Device Role / Timing Role: Low-noise, low-IQ gain stage with shutdown control for duty-cycled wake-on-voice operation. Use Value: 750-µA active current + <1-µA shutdown extends CR2032 battery life to >2 years in intermittent-use devices. |
Use Scenario: Signal conditioning for multi-channel environmental sensors (temp/humidity/pressure) in remote telemetry units. IC Role / Device Role / Timing Role: Rail-to-rail I/O amplifier interfacing with 1.8-V microcontroller ADCs and internal reference. Use Value: 1.8-V minimum supply allows direct connection to energy-harvesting PMIC outputs, eliminating level-shifting components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA364AID | No Enable pin; 5-pin SOT-23 or 8-pin SOIC; identical AC specs but lacks shutdown function. | Preferred where board space is constrained and continuous operation is acceptable. | Select OPA364AID only if shutdown capability is unnecessary and SOIC-8 footprint compatibility is required. |
| OPA333AIDR | Zero-drift architecture; 10-µV max offset, 0.1-µV/°C drift; 350-kHz GBW; 17-µA IQ. | Better for ultra-precision DC measurements; unsuitable for >100-kHz signal paths. | Choose OPA333AIDR when offset drift dominates error budget, not bandwidth or power. |
Compared with OPA364AID, OPA363AID adds shutdown control at the cost of one extra pin; compared with OPA333AIDR, it trades ultra-low offset for 20× higher bandwidth and 45× lower quiescent current - making it optimal for battery-powered, medium-precision AC-coupled signal chains.
Availability
OPA363AID is available at Aetrix Electronics and suitable for portable medical sensors, industrial process transmitters, smart home audio front-ends, and battery-powered data loggers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA363AID 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 OPA363AID belongs to TI's OPAx363 family of rail-to-rail CMOS op amps, designed specifically for high-accuracy, low-voltage signal conditioning in space- and power-constrained battery-operated systems.
FAQ
What is the maximum supply voltage for the OPA363AID?
The OPA363AID supports a maximum supply voltage of 5.5 V across the V+ to V– terminals. Absolute maximum ratings specify that exceeding this voltage - even momentarily - may cause permanent damage. Operation above 5.5 V violates the recommended operating conditions and invalidates parametric guarantees, including CMRR, offset, and output swing. Always verify decoupling and transient suppression in 5-V systems to prevent overshoot.
Does the OPA363AID require external compensation for unity-gain stability?
No, the OPA363AID is internally compensated and unity-gain stable. It drives resistive and capacitive loads up to 100 pF without oscillation or peaking, as verified in the datasheet's Figure 19 (small-signal step response). For loads >100 pF, a series resistor (typically 10–50 Ω) between the output and capacitive load restores stability without affecting DC accuracy.
How does the Enable pin on the OPA363AID behave during power-up?
The Enable pin (Pin 5) on the OPA363AID is active-low and defaults to disabled (high-impedance output, <1 µA IQ) if left unconnected or pulled high. To ensure predictable startup, tie Enable to V+ through a 10-kΩ resistor or drive it actively low after V+ stabilizes. TI confirms that the amplifier enters normal operation within 20 µs after Enable transitions low.
Can the OPA363AID drive ADC inputs directly without external buffering?
Yes - the OPA363AID's rail-to-rail output swing, low 10-mV saturation voltage, and 7-MHz bandwidth make it suitable for direct driving of SAR and delta-sigma ADCs with input ranges spanning V– to V+. Its 90-dB CMRR minimizes differential nonlinearity errors caused by common-mode noise coupling into the ADC reference path, as validated in TI's OPA363 application note SBAA223.
What is the input bias current specification for the OPA363AID over temperature?
The OPA363AID specifies ±1 pA typical and ±10 pA maximum input bias current at 25°C, with values remaining below ±100 pA across the full –40°C to +125°C range per TI's typical characteristics (Figure 12). This ultra-low IB enables high-impedance sensor interfaces (e.g., pH electrodes or piezoelectric elements) without significant voltage drop across feedback networks.
OPA363AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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
OPA363AID FAQ
1.How can I place an order for OPA363AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA363AID 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 OPA363AID reliable?
The price and inventory of OPA363AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA363AID is usually 5 days.
3.What payment methods are accepted for OPA363AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA363AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA363AID?
OPA363AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA363AID 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 OPA363AID?
For technical support, including OPA363AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA363AID requirements.
6.How does Aetrix verify that OPA363AID is sourced from the original manufacturer or authorized distributors?
All OPA363AID 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 OPA363AID meets industry standards.
7.What is the process for return or replacement of OPA363AID?
All OPA363AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA363AID, 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 OPA363AID part is unused and in its original packaging.
Return procedure for OPA363AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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