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Texas Instruments OPA320SAIDBVR
- Part No.:
- OPA320SAIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA320SAIDBVR.pdf
- Description:
- IC CMOS 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,817
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Product details
Overview
OPA320SAIDBVR from Texas Instruments is a precision, single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-noise (7 nV/√Hz at 10 kHz), ultra-low input bias current (0.9 pA max), and wide bandwidth (20 MHz) in 1.8–5.5 V single-supply operation. It features shutdown functionality, 150 µV max offset voltage, and drives high-resolution ADCs in battery-powered sensor signal chains.
For engineers reviewing the OPA320SAIDBVR datasheet, OPA320SAIDBVR pinout, OPA320SAIDBVR application, or OPA320SAIDBVR equivalent, this page delivers verified specifications, validated SOT-23-6 pin mapping, real-world use cases in transimpedance amplification and PLC analog I/O, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The OPA320SAIDBVR implements a linear input stage with zero-crossover distortion architecture to maintain 114 dB CMRR across full rail-to-rail common-mode range (V– –0.1 V to V+ +0.1 V). Its CMOS input stage enables 0.9 pA max input bias current and supports operation down to 1.8 V while delivering 10 V/µs slew rate and 0.32 µs settling time to 0.01%.
Shutdown control is active-low on Pin 5, reducing quiescent current to 0.1 µA per channel. The device achieves 106 dB PSRR over 1.8–5.5 V supply range and maintains output swing within 10 mV of rails at 10 kΩ load - critical for low-voltage, high-precision buffering in unregulated battery systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 20 MHz gain-bandwidth product - enables stable unity-gain operation and accurate 12–16-bit ADC driving up to ~10 MSPS sampling rates. |
| Input Bias Current | 0.9 pA maximum - preserves signal integrity in high-impedance sensor interfaces (e.g., pH electrodes, photodiode TIA) without measurable leakage error. |
| Input Voltage Noise | 7 nV/√Hz at 10 kHz - minimizes noise contribution in mid-frequency signal conditioning, especially critical for 16-bit dynamic range preservation. |
| Offset Voltage | 150 µV maximum - ensures ≤0.0023% gain error in 65 V full-scale industrial analog inputs (e.g., 4–20 mA loop receivers). |
| Supply Range | 1.8 V to 5.5 V single supply - allows direct connection to Li-ion (3.0–4.2 V), coin cell (3 V), or regulated 3.3 V/5 V rails without level-shifting. |
| Shutdown Current | 0.1 µA typical - reduces system standby power by >99.9% versus active mode (1.45 mA), enabling multi-year battery life in IoT edge nodes. |
| CMRR | 114 dB typical - rejects common-mode interference from noisy digital supplies or motor drivers in mixed-signal PLC modules. |
Pinout & Package
OPA320SAIDBVR is housed in a 6-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, with exposed pad not connected internally. Thermal resistance RθJA is 177.5°C/W, requiring minimal PCB copper for thermal management in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output (OUT) | Amplifier output node; capable of sourcing/sinking ±65 mA and swinging within 10 mV of rails at 10 kΩ load. |
| 2 | Negative Supply (V–) | Lowest potential supply rail; connects to ground or negative reference; internal ESD diodes clamp inputs to this rail. |
| 3 | Noninverting Input (+IN) | High-impedance CMOS input; accepts signals from V– –0.1 V to V+ +0.1 V with <0.9 pA bias current. |
| 4 | Inverting Input (–IN) | High-impedance CMOS input; used for feedback configuration; matched to +IN for <0.9 pA input offset current. |
| 5 | Shutdown (SHDN) | Active-low enable control; pulled high (≥0.7×V+) to activate; pulled low (≤0.3×V+) to reduce IQ to 0.1 µA. |
| 6 | Positive Supply (V+) | Highest potential supply rail; accepts 1.8–5.5 V; PSRR of 106 dB ensures immunity to supply ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Input common-mode extends 100 mV beyond both rails; output swings to within 10 mV of rails - maximizes dynamic range in low-voltage systems. |
| Zero-crossover distortion | Eliminates crossover nonlinearity in Class AB input stages - ensures monotonic transfer function and <0.0005% THD+N at 10 kHz. |
| Low-noise charge pump | On-chip charge pump stabilizes bias circuitry - maintains 7 nV/√Hz noise density and 114 dB CMRR independent of supply voltage. |
| Fast enable/disable | 20 µs turn-on and 3 µs turn-off times - enables burst-mode operation in portable instrumentation without output glitches. |
| High PSRR | 106 dB PSRR across 1.8–5.5 V - permits direct battery connection without LDO filtering in portable medical sensors and handheld test gear. |
Applications
| High-Z Sensor Signal Conditioning | Transimpedance Amplifiers |
|---|---|
|
Use Scenario: Amplifying microamp-level current from photodiodes or electrochemical sensors in portable gas analyzers. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with ultra-low input bias current to prevent signal loss and offset drift. Use Value: 0.9 pA max IB ensures <1 µV error across 1 GΩ feedback resistor - preserving sub-ppm resolution in optical absorption measurements. |
Use Scenario: Converting photocurrent from avalanche photodiodes in laser distance meters. IC Role / Device Role / Timing Role: High-speed, low-noise TIA front-end with 20 MHz bandwidth and 7 nV/√Hz noise floor. Use Value: 10 V/µs slew rate and 0.32 µs settling support 3-MHz pulsed laser return timing with <10 ps jitter contribution. |
| Programmable Logic Controllers (PLCs) | Input/Output ADC/DAC Buffers |
|
Use Scenario: Buffering 4–20 mA loop inputs and thermocouple signals in industrial automation modules. IC Role / Device Role / Timing Role: Rail-to-rail input/output buffer with 114 dB CMRR rejecting 50/60 Hz magnetic pickup in factory environments. Use Value: 150 µV max VOS contributes <0.0023% error in 16-bit (65536-step) analog input scaling - meeting SIL-2 accuracy requirements. |
Use Scenario: Driving SAR ADC inputs and isolating DAC outputs in motor control feedback circuits. IC Role / Device Role / Timing Role: Low-output-impedance driver ensuring full-scale settling before ADC aperture time (<100 ns). Use Value: 0.32 µs to 0.01% eliminates conversion errors in 1 MSPS 16-bit ADCs - maintaining effective number of bits (ENOB) ≥15.2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA320AIDBVR | No shutdown pin; 5-pin SOT-23; identical AC/DC specs except IQ = 1.45 mA (no low-power mode). | Suitable where continuous operation is required and board space is constrained (5-pin vs 6-pin footprint). | Select when shutdown functionality is unnecessary and PCB layout must minimize component count. |
| ADA4522-1ARMZ | Zero-drift architecture; 2.5 µV max VOS, 0.005 µV/°C drift; higher IQ (1.2 mA); no shutdown; 8-MSOP package. | Better DC precision for DC-coupled strain gauge bridges; unsuitable for high-speed TIA due to 3.6 MHz GBW. | Select when long-term DC stability dominates over speed/noise; avoid for >100 kHz signal paths. |
Compared with OPA320SAIDBVR, OPA320AIDBVR saves board area but forfeits power gating, while ADA4522-1ARMZ improves DC accuracy at the cost of bandwidth and shutdown capability - making OPA320SAIDBVR optimal for battery-powered, medium-speed precision signal chains requiring dynamic power control.
Availability
OPA320SAIDBVR is available at Aetrix Electronics and suitable for high-Z sensor interfaces, programmable logic controller analog I/O modules, and portable test equipment requiring stable component supply across extended temperature ranges (–40°C to +125°C).
Supply support for OPA320SAIDBVR 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 amplifiers and signal chain solutions.
The OPA320 family was designed specifically for high-resolution data acquisition systems - balancing ultra-low input bias current, low noise, rail-to-rail operation, and shutdown capability to serve battery-powered instrumentation, industrial sensors, and medical diagnostics.
FAQ
What is the maximum input common-mode voltage range for OPA320SAIDBVR?
The OPA320SAIDBVR supports an input common-mode voltage range from (V–) – 0.1 V to (V+) + 0.1 V. At 5.5 V supply, this spans –0.1 V to 5.6 V; at 1.8 V supply, it covers –0.1 V to 1.9 V. This rail-to-rail input capability ensures full utilization of supply headroom in low-voltage systems without signal clipping.
Does OPA320SAIDBVR require external compensation for unity-gain stability?
No, OPA320SAIDBVR is internally compensated and unity-gain stable. It drives capacitive loads up to 50 pF without oscillation and maintains 47° phase margin at 5 V supply with 50 pF load - eliminating need for external compensation networks in standard buffer or gain-of-one configurations.
How does the shutdown feature affect output state in OPA320SAIDBVR?
When SHDN is pulled low (≤0.3×V+), OPA320SAIDBVR disables its internal bias circuitry and places the output in high-impedance (Hi-Z) state - not tri-state, but effectively disconnected. This prevents loading of downstream circuitry and avoids contention in multiplexed analog buses during sleep modes.
Can OPA320SAIDBVR drive a 600 Ω load at 10 kHz with low distortion?
Yes, OPA320SAIDBVR delivers 0.0011% THD+N at 10 kHz with 2 VPP output into 600 Ω. Its 10 V/µs slew rate and 20 MHz bandwidth ensure linear operation under these conditions, making it suitable for audio-grade line drivers and communication channel buffers requiring high fidelity.
What is the thermal performance of OPA320SAIDBVR in its SOT-23-6 package?
OPA320SAIDBVR in DBV (SOT-23-6) package has RθJA = 177.5°C/W and RθJB = 27.4°C/W. With 1.45 mA quiescent current at 5.5 V, power dissipation is ~8 mW - resulting in <1.5°C junction rise above ambient on standard FR-4 PCB, confirming suitability for compact, sealed enclosures without forced airflow.
OPA320SAIDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 40 µV
- Current - Supply:
- 1.5mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
OPA320SAIDBVR FAQ
1.How can I place an order for OPA320SAIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA320SAIDBVR 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 OPA320SAIDBVR reliable?
The price and inventory of OPA320SAIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA320SAIDBVR is usually 5 days.
3.What payment methods are accepted for OPA320SAIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA320SAIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA320SAIDBVR?
OPA320SAIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA320SAIDBVR 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 OPA320SAIDBVR?
For technical support, including OPA320SAIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA320SAIDBVR requirements.
6.How does Aetrix verify that OPA320SAIDBVR is sourced from the original manufacturer or authorized distributors?
All OPA320SAIDBVR 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 OPA320SAIDBVR meets industry standards.
7.What is the process for return or replacement of OPA320SAIDBVR?
All OPA320SAIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA320SAIDBVR, 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 OPA320SAIDBVR part is unused and in its original packaging.
Return procedure for OPA320SAIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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