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Texas Instruments OPA373AIDBVT
- Part No.:
- OPA373AIDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA373AIDBVT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:8,656
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Product details
Overview
OPA373AIDBVT from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, battery-operated systems. It delivers 6.5 MHz gain-bandwidth, 5 V/µs slew rate, and 585 µA quiescent current per amplifier while operating from 2.3 V to 5.5 V supply. Its shutdown mode reduces current to <1 µA, enabling use in portable medical sensors and handheld data loggers requiring precision signal conditioning with ultra-low standby power.
For engineers reviewing the OPA373AIDBVT datasheet, OPA373AIDBVT pinout, OPA373AIDBVT application, or OPA373AIDBVT equivalent, key selection criteria include verified rail-to-rail I/O swing (≤25 mV from rails), guaranteed operation up to 125°C, and confirmed 10 pA max input bias current - all critical for high-impedance sensor front-ends and precision A/D driver stages in space-constrained industrial IoT nodes.
Technical Context
The OPA373AIDBVT employs a complementary differential input stage enabling rail-to-rail common-mode range (V– – 0.2 V to V+ + 0.2 V) and stable operation across its full 2.3 V–5.5 V supply range. Its class AB output stage supports 100 kΩ loads while maintaining ≤25 mV output swing from rails at 25°C.
It integrates logic-controlled shutdown with 3 µs turnoff and 12 µs turnon times, reducing supply current to <1 µA. Input offset voltage is specified at ≤5 mV (max) over –40°C to 125°C, with drift of ≤3 µV/°C, supporting DC-coupled applications in automotive cabin sensors and industrial temperature transmitters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 6.5 MHz - enables stable unity-gain buffer and 2nd-order active filter designs up to ~1 MHz without compensation. |
| Slew rate | 5 V/µs - supports clean 100 kHz full-scale sine wave output into 10 kΩ load for ADC driver applications. |
| Input bias current | ≤10 pA (max) - preserves signal integrity in high-impedance pH electrode or photodiode amplifier circuits. |
| Supply voltage range | 2.3 V to 5.5 V - compatible with single-cell Li-ion (3.0–4.2 V), 3.3 V logic, and 5 V legacy systems without level shifting. |
| Output swing | ≤25 mV from rails (RL = 100 kΩ) - maximizes dynamic range in low-voltage 12-bit+ SAR ADC interfaces. |
| Shutdown current | <1 µA - extends battery life in intermittent-sampling sensor nodes by >1000× vs active mode. |
| Operating temperature | –40°C to 125°C - qualified for under-hood automotive and industrial control cabinet deployments. |
Pinout & Package
OPA373AIDBVT is housed in a 6-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm × 1.45 mm, optimized for space-constrained PCB layouts in wearable and portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output | Amplified signal source; drives resistive or capacitive loads up to 250 pF in unity-gain configuration. |
| 2 - V– | Negative supply | Ground reference or negative rail; must be connected to system GND or lowest potential in dual-supply setups. |
| 3 - +IN | Noninverting input | High-impedance node (10¹³ Ω || 6 pF); accepts signals from sensors, DACs, or other analog sources. |
| 4 - –IN | Inverting input | High-impedance node; used for feedback networks, transimpedance configurations, or differential gain stages. |
| 5 - Enable | Shutdown control | Active-high logic input; ≥(V– + 2 V) enables operation; ≤(V– + 0.8 V) places amplifier in sub-1-µA shutdown. |
| 6 - V+ | Positive supply | Primary power input; supports 2.3–5.5 V; decoupling capacitor (0.1 µF) required near pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Extends 200 mV beyond supply rails (V– – 0.2 V to V+ + 0.2 V), enabling direct interfacing with 0–VCC sensor outputs. |
| Low input bias current | ≤10 pA max ensures minimal error in high-Z source applications like thermocouple amplifiers or piezoelectric sensors. |
| Shutdown functionality | Reduces quiescent current to <1 µA with 3 µs turnoff, supporting duty-cycled measurement architectures. |
| Wide temperature rating | Specified from –40°C to 125°C, eliminating derating concerns in automotive engine control or industrial motor drive environments. |
| Low offset voltage drift | ≤3 µV/°C enables stable DC performance across thermal cycles in precision instrumentation and calibration equipment. |
Applications
| Portable ECG Monitor Front-End | Battery-Powered Gas Sensor Signal Chain |
|---|---|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in a handheld cardiac monitor with 72-hour battery life. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail I/O op amp configured as a low-noise, high-input-impedance instrumentation amplifier first stage. Use Value: 10 pA input bias current prevents electrode polarization; 585 µA quiescent current enables continuous sampling without compromising runtime. |
Use Scenario: Conditioning output from electrochemical CO sensor in a portable air quality detector powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Transimpedance amplifier converting nanoamp-level sensor current to voltage, followed by rail-to-rail output buffer driving 12-bit ADC. Use Value: Rail-to-rail output swing maximizes ADC utilization; shutdown mode cuts system idle current to sub-µA during 30-second measurement intervals. |
| Industrial Temperature Transmitter | Automotive Cabin Air Quality Module |
Use Scenario: Signal conditioning for Pt100 RTD in a DIN-rail mounted process transmitter operating in factory ambient (–25°C to 70°C). IC Role / Device Role / Timing Role: Precision voltage follower and excitation current source driver in 4–20 mA loop-powered design. Use Value: 5 mV max offset and 3 µV/°C drift ensure ≤0.1°C measurement error across full industrial temperature range. |
Use Scenario: Analog front-end for NDIR CO₂ sensor in vehicle HVAC control unit, requiring operation up to 105°C ambient. IC Role / Device Role / Timing Role: Low-drift, rail-to-rail output buffer isolating sensor signal from noisy 12 V automotive supply domain. Use Value: 125°C qualification eliminates need for external thermal derating; 6.5 MHz bandwidth supports fast response to cabin air composition changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | No shutdown pin; 17 µV max offset; 0.1 µV/°C drift; same 6.5 MHz GBW and 585 µA IQ. | Lacks enable control; better for always-on precision DC applications where shutdown is unnecessary. | Select OPA333AIDBVR when ultra-low offset drift outweighs need for power gating. |
| MCP6001T-E/OT | 1 MHz GBW; 100 nA IB; no shutdown; 100 µA IQ; rated only to 125°C with reduced AC specs. | Lower bandwidth and higher bias current limit use in high-impedance, high-frequency sensor paths. | Select MCP6001T-E/OT only for cost-sensitive, low-speed (<100 kHz), non-shutdown applications with relaxed DC accuracy. |
Compared with OPA373AIDBVT, OPA333AIDBVR offers superior DC precision but no power management, while MCP6001T-E/OT trades bandwidth, bias current, and shutdown capability for lower cost and simpler integration in basic sensing roles.
Availability
OPA373AIDBVT is available at Aetrix Electronics and suitable for portable medical devices, battery-powered environmental sensors, and industrial temperature transmitters requiring stable component supply with guaranteed long-term availability and traceable lot documentation.
Supply support for OPA373AIDBVT 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 OPAx373 family was designed specifically for portable, battery-powered instrumentation requiring rail-to-rail I/O, low quiescent current, and robust operation across extended temperature ranges - targeting medical, industrial, and automotive sensor interface applications.
FAQ
What is the maximum capacitive load the OPA373AIDBVT can drive stably in unity-gain configuration?
The OPA373AIDBVT supports stable unity-gain operation with capacitive loads up to 250 pF. Beyond this, phase margin degrades due to interaction between output resistance and load capacitance. For loads >250 pF, TI recommends adding a 10–20 Ω series resistor between the OPA373AIDBVT output and the capacitive load to restore stability without significantly affecting DC accuracy.
Does the OPA373AIDBVT require external compensation for gain-of-10 operation?
No, the OPA373AIDBVT is unity-gain stable and does not require external compensation at any closed-loop gain ≥1. Its internal compensation ensures ≥60° phase margin across all gains, including G = 10. This simplifies design in active filter and gain-stage applications where predictable frequency response is essential.
Can the OPA373AIDBVT operate from a 2.3 V supply while maintaining full rail-to-rail input and output swing?
Yes - the OPA373AIDBVT is fully specified from 2.3 V to 5.5 V. At 2.3 V, it maintains rail-to-rail input range (V– – 0.2 V to V+ + 0.2 V) and delivers output swing within 25 mV of both rails under light load (100 kΩ), preserving dynamic range in ultra-low-voltage systems such as energy-harvesting sensor nodes.
How does the enable pin of the OPA373AIDBVT behave during power-up?
The OPA373AIDBVT enable pin defaults to active (amplifier enabled) when left unconnected or pulled high. During power-up, if V+ ramps before the enable signal stabilizes, the device enters normal operation once V+ exceeds 2.3 V. To prevent unintended output glitches, TI recommends tying enable to V+ through a pullup resistor or synchronizing it with system power sequencing.
Is the OPA373AIDBVT pin-compatible with other members of the OPA373 family?
OPA373AIDBVT (6-pin SOT-23) shares identical pinout with OPA373AIDBV (same part number suffix), but is not pin-compatible with 5-pin OPA374 variants or 8-pin SOIC versions. The 6-pin DBV package has dedicated enable and no NC pins, whereas 5-pin SOT-23 OPA374 omits enable and repurposes pin 5 as V+. Always verify package-specific pin functions before board reuse.
OPA373AIDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- 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:
- 6.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 585µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.3 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
OPA373AIDBVT FAQ
1.How can I place an order for OPA373AIDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA373AIDBVT 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 OPA373AIDBVT reliable?
The price and inventory of OPA373AIDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA373AIDBVT is usually 5 days.
3.What payment methods are accepted for OPA373AIDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA373AIDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA373AIDBVT?
OPA373AIDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA373AIDBVT 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 OPA373AIDBVT?
For technical support, including OPA373AIDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA373AIDBVT requirements.
6.How does Aetrix verify that OPA373AIDBVT is sourced from the original manufacturer or authorized distributors?
All OPA373AIDBVT 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 OPA373AIDBVT meets industry standards.
7.What is the process for return or replacement of OPA373AIDBVT?
All OPA373AIDBVT units undergo pre-shipment inspection (PSI). If there is an issue with OPA373AIDBVT, 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 OPA373AIDBVT part is unused and in its original packaging.
Return procedure for OPA373AIDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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