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Texas Instruments OPA348AIDBVTG4
- Part No.:
- OPA348AIDBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA348AIDBVTG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,116
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Product details
Overview
OPA348AIDBVTG4 from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, single-supply sensor signal conditioning and ADC driving. It delivers 1 MHz gain-bandwidth, 45 µA quiescent current, 0.5 pA input bias current, and operates from 2.1 V to 5.5 V - enabling use in battery-powered smoke alarms and CO detectors where supply headroom and input impedance are critical.
For engineers reviewing the OPA348AIDBVTG4 datasheet, OPA348AIDBVTG4 pinout, OPA348AIDBVTG4 application, or OPA348AIDBVTG4 equivalent, key selection criteria include its extended common-mode range (V– –0.2 V to V+ +0.2 V), 18 mV output swing from rail (RL = 100 kΩ), and unity-gain stability with up to 250 pF capacitive load drive - all validated across –40°C to +125°C.
Technical Context
The OPA348AIDBVTG4 uses a complementary N/P-channel input stage enabling rail-to-rail input operation with no phase inversion beyond the rails when input current is limited. Its class AB output stage supports rail-to-rail output swing while maintaining >94 dB open-loop gain at 100 kΩ loads.
It is unity-gain stable and specified over full 2.1 V–5.5 V supply range and –40°C to +125°C temperature range. Input offset voltage is 1–5 mV (typ/max), drift is 4 µV/°C, and PSRR/CMRR exceed 60 dB up to 1 kHz - making it suitable for precision DC-coupled sensor interfaces feeding 12-bit ADCs like ADS7822.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-bandwidth product | 1 MHz - enables stable unity-gain buffering of audio-band and DC sensor signals without oscillation. |
| Quiescent current | 45 µA (typ) - allows continuous operation for years on coin-cell batteries in portable safety devices. |
| Input bias current | 0.5 pA - preserves signal integrity from high-impedance sources like electret microphones or gas sensors. |
| Input voltage range | V– –0.2 V to V+ +0.2 V - accepts signals beyond supply rails, simplifying level-shifting in single-supply systems. |
| Output swing (RL = 100 kΩ) | Within 18 mV of rails - maximizes dynamic range into 12-bit ADCs such as ADS7822 with 0–VREF input range. |
| Supply voltage range | 2.1 V to 5.5 V - supports direct interface with Li-ion, alkaline, or regulated 3.3 V/5 V rails without LDO overhead. |
| Operating temperature | –40°C to +125°C - qualified for automotive cabin, industrial, and harsh-environment safety equipment. |
Pinout & Package
OPA348AIDBVTG4 is packaged in a 5-pin SOT-23 (DBV) case measuring 2.90 mm × 1.60 mm, optimized for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Delivers rail-to-rail buffered signal; drives ADC input capacitance directly with <5 µs 0.1% settling. |
| 2 - V– | Negative supply | Ground reference for single-supply operation; must be bypassed with 0.01 µF ceramic capacitor. |
| 3 - +IN | Noninverting input | High-impedance node (10¹³ Ω || 6 pF); accepts sensor outputs up to V+ +0.2 V without damage. |
| 4 - –IN | Inverting input | Used in transimpedance or differential configurations; matched to +IN for low offset error. |
| 5 - V+ | Positive supply | Accepts 2.1–5.5 V; powers internal CMOS stages; requires local 0.01 µF ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal utilization in 2.1–5.5 V systems without external level-shifting circuitry. |
| 0.5 pA input bias current | Minimizes voltage error across high-value feedback resistors (>1 MΩ) used in gas sensor amplifiers. |
| Unity-gain stability | Eliminates need for external compensation when used as buffer for ADC sample-and-hold inputs. |
| 250 pF capacitive load drive | Directly drives typical ADC input capacitance (e.g., ADS7822) without series isolation resistor. |
| –40°C to +125°C operation | Supports deployment in automotive interior modules, industrial fire panels, and outdoor environmental monitors. |
Applications
| Smoke Detector Signal Conditioning | CO Detector Front-End |
|---|---|
Use Scenario: Amplifies weak ionization chamber current (pA–nA range) into measurable voltage for analog processing prior to 12-bit ADC conversion. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current and rail-to-rail output swing to maximize ADC code utilization. Use Value: 0.5 pA IB enables accurate measurement of sub-nA currents; 45 µA IQ extends battery life beyond 5 years in standby mode. | Use Scenario: Buffers electrochemical sensor output (mV-level, high source impedance) before sampling by ADS7822 ADC in portable CO monitor. IC Role / Device Role / Timing Role: Precision DC-coupled buffer with 1 mV max offset and 4 µV/°C drift to maintain calibration stability across temperature. Use Value: Rail-to-rail input accepts sensor output near ground or VREF; 18 mV output swing ensures >4090 codes of 4096 from 12-bit ADC. |
| Portable Medical Pulse Oximeter | Low-Power Industrial Sensor Node |
Use Scenario: Conditions photodiode current from red/IR LEDs in battery-powered pulse oximeters, rejecting ambient light via synchronous detection. IC Role / Device Role / Timing Role: Low-noise, low-power transimpedance amplifier with 35 nV/√Hz input voltage noise and 1 MHz bandwidth for pulse waveform fidelity. Use Value: 1 MHz GBW supports clean amplification of 1–10 Hz physiological signals; 45 µA IQ reduces system power budget by >30% vs. legacy op amps. | Use Scenario: Interfaces thermistor, RTD, or humidity sensor in wireless IoT node powered by energy harvesting or coin cell. IC Role / Device Role / Timing Role: Precision voltage follower with 2.1 V minimum supply, enabling direct connection to buck-boost regulators or supercapacitor storage. Use Value: 2.1 V operation extends usable battery voltage down to end-of-life; SC70/SOT-23 footprint saves PCB area in multi-sensor modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-E/OT | Lower GBW (1 MHz same), higher IQ (100 µA), wider offset range (0–4.5 mV), same SOT-23-5 package. | Less suitable for multi-year battery life; acceptable where higher drive strength or lower cost is prioritized over ultra-low IQ. | Select when supply current <45 µA is not mandatory and cost sensitivity outweighs micropower optimization. |
| TLV9001IDBVR | Higher IQ (60 µA), lower offset (0.3 mV typ), improved CMRR (90 dB), same rail-to-rail I/O and SOT-23-5 footprint. | Better for precision DC measurements where offset and rejection matter more than absolute lowest power. | Choose when 0.3 mV offset and 90 dB CMRR improve system accuracy more than saving 15 µA IQ justifies. |
Compared with MCP6001T-E/OT and TLV9001IDBVR, OPA348AIDBVTG4 uniquely balances 45 µA IQ, 0.5 pA IB, and 1 MHz GBW in a 5-pin SOT-23 - making it optimal for long-life, high-impedance sensor nodes where every microamp and picoamp counts.
Availability
OPA348AIDBVTG4 is available at Aetrix Electronics and suitable for smoke alarm manufacturing, portable medical device production, and industrial sensor node development requiring stable component supply and long-term lifecycle support.
Supply support for OPA348AIDBVTG4 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPAx348 product line was designed specifically for ultra-low-power, single-supply sensor signal conditioning - targeting battery-operated safety, medical, and environmental monitoring systems demanding rail-to-rail performance and extended temperature operation.
FAQ
What is the maximum capacitive load the OPA348AIDBVTG4 can drive in unity-gain configuration?
The OPA348AIDBVTG4 is specified to drive up to 250 pF of pure capacitive load while maintaining stability in unity-gain configuration. This capability enables direct interfacing with ADC input capacitances such as those found in the ADS7822 without requiring external isolation resistors. For loads exceeding 250 pF, a small series resistor (10–20 Ω) at the output improves phase margin without degrading DC accuracy significantly.
Does the OPA348AIDBVTG4 support operation below 2.5 V supply?
Yes, the OPA348AIDBVTG4 is fully specified and functional from 2.1 V to 5.5 V supply voltage. Electrical characteristics including input offset voltage, gain-bandwidth, and output swing are guaranteed across this full range. At 2.1 V, it maintains rail-to-rail input and output operation, making it suitable for systems powered by partially discharged lithium coin cells or low-voltage energy harvesters.
Can the OPA348AIDBVTG4 inputs safely exceed the supply rails?
Yes - the OPA348AIDBVTG4 input common-mode range extends to V– –0.2 V and V+ +0.2 V under normal operation. Absolute maximum ratings allow inputs up to V– –0.5 V and V+ +0.5 V, provided input current is limited to ≤10 mA using a series resistor. Unlike many op amps, it does not exhibit phase inversion when inputs exceed rails, preserving signal integrity in transient-overvoltage conditions.
What is the typical input offset voltage drift of the OPA348AIDBVTG4 over temperature?
The OPA348AIDBVTG4 has a typical input offset voltage drift of 4 µV/°C across the full operating temperature range of –40°C to +125°C. This low drift ensures minimal calibration drift in precision sensor front-ends, such as CO detector electrochemical sensors or RTD interfaces, where long-term accuracy without periodic recalibration is required.
Is the OPA348AIDBVTG4 pin-compatible with other members of the OPAx348 family?
No - the OPA348AIDBVTG4 (single-channel, 5-pin SOT-23) is not pin-compatible with OPA2348 (dual, 8-pin) or OPA4348 (quad, 14-pin). Pin count, pin functions, and package footprints differ across the family. The OPA348AIDBVTG4 shares pinout only with other OPA348 variants in the same DBV (SOT-23-5) package, such as OPA348AIDBVR.
OPA348AIDBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 45µA
- Current - Output / Channel:
- 10 mA
- Voltage - Supply Span (Min):
- 2.1 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
OPA348AIDBVTG4 FAQ
1.How can I place an order for OPA348AIDBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA348AIDBVTG4 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 OPA348AIDBVTG4 reliable?
The price and inventory of OPA348AIDBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA348AIDBVTG4 is usually 5 days.
3.What payment methods are accepted for OPA348AIDBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA348AIDBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA348AIDBVTG4?
OPA348AIDBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA348AIDBVTG4 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 OPA348AIDBVTG4?
For technical support, including OPA348AIDBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA348AIDBVTG4 requirements.
6.How does Aetrix verify that OPA348AIDBVTG4 is sourced from the original manufacturer or authorized distributors?
All OPA348AIDBVTG4 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 OPA348AIDBVTG4 meets industry standards.
7.What is the process for return or replacement of OPA348AIDBVTG4?
All OPA348AIDBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA348AIDBVTG4, 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 OPA348AIDBVTG4 part is unused and in its original packaging.
Return procedure for OPA348AIDBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA348AIDBVTG4 Tags
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