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Texas Instruments OPA348AIDCKT
- Part No.:
- OPA348AIDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA348AIDCKT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,290
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Product details
Overview
OPA348AIDCKT from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, single-supply systems. It delivers 1 MHz gain-bandwidth, 45 µA quiescent current, and 0.5 pA input bias current, operating from 2.1 V to 5.5 V. It serves as an ADC input driver in battery-powered sensor front-ends such as smoke alarms and CO detectors.
For engineers reviewing the OPA348AIDCKT datasheet, OPA348AIDCKT pinout, OPA348AIDCKT application, or OPA348AIDCKT equivalent, key selection criteria include its ultra-low IQ, rail-to-rail operation at sub-2.5 V supply, input voltage range extending 200 mV beyond rails, and verified capacitive load drive up to 250 pF in unity-gain configuration.
Technical Context
The OPA348AIDCKT uses a complementary N/P-channel input stage enabling rail-to-rail common-mode input (V– – 0.2 V to V+ + 0.2 V) and a class AB output stage delivering 18 mV rail-to-rail swing into 100 kΩ. Its unity-gain stability and 1 MHz bandwidth support precision buffering of medium-speed ADCs like the ADS7822.
It features 0.5 pA input bias current and 10¹³ Ω || 3 pF differential input impedance-critical for high-impedance sensor interfaces-and maintains 94 dB open-loop gain with 70 dB CMRR across –40°C to +125°C, ensuring robust performance in wide-temperature industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.1 V to 5.5 V - enables direct use with Li-ion, 3.3 V, and 5 V rails without regulation |
| Quiescent Current | 45 µA typical - supports >10-year battery life in always-on smoke/CO detectors |
| Gain-Bandwidth Product | 1 MHz - sufficient for settling 12-bit ADC inputs (e.g., ADS7822) within 5 µs |
| Input Bias Current | 0.5 pA - preserves signal integrity from high-Z sources like electret mics or gas sensors |
| Input Common-Mode Range | V– – 0.2 V to V+ + 0.2 V - allows direct interfacing to 0–VREF ADC inputs without level-shifting |
| Output Swing (100 kΩ) | Within 18 mV of rails - maximizes dynamic range for 12-bit conversion at low supply voltages |
| Capacitive Load Drive | 250 pF (unity-gain) - eliminates need for external isolation resistors when driving ADC sample-hold capacitance |
Pinout & Package
The OPA348AIDCKT is housed in a 5-pin SC70 package (2.00 mm × 1.25 mm), optimized for space-constrained portable and battery-powered PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Drives ADC input or sensor load; rail-to-rail swing ensures full-scale utilization of 12-bit ADC reference |
| 2 (V–) | Negative supply | Typically connected to GND in single-supply systems; sets lower bound of input/output range |
| 3 (+IN) | Noninverting input | High-impedance node (10¹³ Ω) for sensor signal routing; immune to leakage-induced offset |
| 4 (–IN) | Inverting input | Accepts feedback network; supports unity-gain buffer or precision gain configurations |
| 5 (V+) | Positive supply | Accepts 2.1–5.5 V; bypassed with 0.01 µF ceramic capacitor per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full 0–VREF signal conditioning from 2.1 V supply without external level-shifting circuitry |
| 0.5 pA input bias current | Minimizes voltage error on high-impedance sensor nodes (e.g., electrochemical gas sensors) |
| 1 MHz bandwidth at 45 µA | Delivers optimal power-bandwidth trade-off for 12-bit, 50 kSPS ADC drivers in portable equipment |
| –40°C to +125°C operation | Validated performance across automotive cabin and industrial ambient temperature extremes |
| SC70-5 package | Reduces board area by >60% vs SOIC-8 while maintaining thermal resistance of 267°C/W (RθJA) |
Applications
| Smoke Detector Front-End | CO Gas Sensor Interface |
|---|---|
Use Scenario: Amplifies weak ionization current from smoke chamber before feeding to 12-bit ADC. IC Role / Device Role / Timing Role: Low-noise, low-IQ transimpedance amplifier and ADC driver. Use Value: 0.5 pA input bias prevents signal corruption; 45 µA IQ extends alkaline battery life beyond 10 years. | Use Scenario: Conditions analog output of electrochemical CO sensor (nA-level current, MΩ source impedance). IC Role / Device Role / Timing Role: High-impedance buffer and precision gain stage prior to ADS7822 sampling. Use Value: Rail-to-rail input accepts 0–3.3 V sensor output directly; 1 MHz GBW settles within 5 µs for 50 kSPS acquisition. |
| Portable Medical Pulse Oximeter | Low-Power Industrial Sensor Node |
Use Scenario: Amplifies photodiode current from red/IR LED pairs in battery-operated wearable oximeters. IC Role / Device Role / Timing Role: Transimpedance amplifier with DC-coupled output to 12-bit SAR ADC. Use Value: 10 µVPP input noise (0.1–10 Hz) preserves SNR; 2.1 V min supply enables direct use with single LiPo cell. | Use Scenario: Signal conditioning for thermistor, RTD, or humidity sensor in wireless IoT node. IC Role / Device Role / Timing Role: Precision buffer isolating high-impedance sensor from ADC input capacitance. Use Value: 250 pF capacitive load drive eliminates external RC snubber; SC70 footprint saves space on compact PCBs. |
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 | 600 kHz GBW, 100 nA IB, same SC70-5 package | Lower bandwidth limits settling time for 12-bit ADCs >25 kSPS | Select when cost sensitivity outweighs bandwidth and input bias requirements |
| TLV9001IDCKR | 1 MHz GBW, 5 pA IB, 65 µA IQ, SC70-5 | Higher IQ reduces battery lifetime in always-on devices; identical pinout | Choose when higher drive strength or enhanced ESD rating (2 kV HBM) is prioritized over ultra-low IQ |
Compared with MCP6001T-E/OT and TLV9001IDCKR, OPA348AIDCKT uniquely combines 1 MHz bandwidth, 0.5 pA input bias, and 45 µA IQ in SC70 - making it the only option validated for 10+ year battery life in safety-critical smoke/CO detection systems.
Availability
OPA348AIDCKT is available at Aetrix Electronics and suitable for smoke detector manufacturing, CO sensor module assembly, and portable medical device production requiring stable component supply and long-term lifecycle assurance.
Supply support for OPA348AIDCKT 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 low-power signal chains.
The OPA348 product line was engineered specifically for ultra-low-power, single-supply sensor signal conditioning in safety-critical portable equipment - emphasizing rail-to-rail operation, femtoampere input bias, and extended temperature reliability.
FAQ
What is the minimum supply voltage required for reliable operation of the OPA348AIDCKT?
The OPA348AIDCKT operates reliably down to 2.1 V, as specified in TI's SBOS213H datasheet. At this voltage, it maintains 1 MHz gain-bandwidth, rail-to-rail input/output, and 45 µA quiescent current - enabling direct interface with single-cell Li-ion or alkaline batteries without regulation. Performance remains fully characterized from –40°C to +125°C across the entire 2.1–5.5 V range.
Does the OPA348AIDCKT support rail-to-rail input beyond the supply rails?
Yes - the OPA348AIDCKT's input common-mode range extends from V– – 0.2 V to V+ + 0.2 V, verified per Section 6.7 of the SBOS213H datasheet. This allows direct connection to signals slightly exceeding the supply (e.g., 0–3.3 V sensor output on a 3.0 V rail). Absolute maximum input is V– – 0.5 V to V+ + 0.5 V, but sustained operation beyond ±0.2 V requires current limiting to ≤10 mA.
Can the OPA348AIDCKT drive the input capacitance of a 12-bit ADC like the ADS7822 without external components?
Yes - the OPA348AIDCKT drives up to 250 pF capacitive load in unity-gain configuration, as confirmed in Figure 13 and Section 7.3.5 of SBOS213H. The ADS7822's input capacitance is 20 pF, well within this limit. TI's typical application circuit (Figure 24) explicitly shows OPA348 driving ADS7822 with no series resistor or compensation network required.
What is the thermal resistance (RθJA) of the OPA348AIDCKT in its SC70-5 package?
The OPA348AIDCKT in SC70-5 (DCK) package has a junction-to-ambient thermal resistance (RθJA) of 267°C/W, per Table 6.4 in SBOS213H. This value assumes standard JEDEC 2-layer board conditions. For continuous operation at 125°C ambient, power dissipation must remain below ~25 mW to keep junction temperature ≤150°C - easily satisfied given its 45 µA IQ at 5.5 V (max 248 µW).
Is the OPA348AIDCKT pin-compatible with other members of the OPAx348 family?
No - the OPA348AIDCKT (SC70-5) has a different pinout than OPA2348 or OPA4348 variants. Its 5-pin configuration (OUT, V–, +IN, –IN, V+) is unique to the single-channel version in micro-packages. OPA2348 (dual) and OPA4348 (quad) use 8-pin SOT-23 or 14-pin TSSOP footprints with distinct pin assignments. Substitution requires PCB redesign.
OPA348AIDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- SC-70-5
OPA348AIDCKT FAQ
1.How can I place an order for OPA348AIDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA348AIDCKT 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 OPA348AIDCKT reliable?
The price and inventory of OPA348AIDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA348AIDCKT is usually 5 days.
3.What payment methods are accepted for OPA348AIDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA348AIDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA348AIDCKT?
OPA348AIDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA348AIDCKT 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 OPA348AIDCKT?
For technical support, including OPA348AIDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA348AIDCKT requirements.
6.How does Aetrix verify that OPA348AIDCKT is sourced from the original manufacturer or authorized distributors?
All OPA348AIDCKT 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 OPA348AIDCKT meets industry standards.
7.What is the process for return or replacement of OPA348AIDCKT?
All OPA348AIDCKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA348AIDCKT, 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 OPA348AIDCKT part is unused and in its original packaging.
Return procedure for OPA348AIDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA348AIDCKT Tags
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