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Texas Instruments OPA2348AIDCNRG4
- Part No.:
- OPA2348AIDCNRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
OPA2348AIDCNRG4.pdf
- Description:
- IC CMOS 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,627
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Product details
Overview
OPA2348AIDCNRG4 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, single-supply sensor signal conditioning and ADC driver applications. It delivers 1 MHz gain-bandwidth, 45 µA per amplifier 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.
For engineers reviewing the OPA2348AIDCNRG4 datasheet, OPA2348AIDCNRG4 pinout, OPA2348AIDCNRG4 application, or OPA2348AIDCNRG4 equivalent, key selection criteria include its rail-to-rail input range extending 200 mV beyond supply rails, 18 mV output swing from rail (RL = 100 kΩ), and guaranteed operation across –40°C to +125°C industrial temperature range.
Technical Context
The OPA2348AIDCNRG4 employs a complementary N/P-channel input stage enabling true rail-to-rail common-mode input range from (V–) – 0.2 V to (V+) + 0.2 V. Its class AB output stage supports rail-to-rail output swing with 100 mV typical drop at 5 kΩ load while maintaining >90 dB open-loop gain.
Designed for unity-gain stability, it drives up to 250 pF capacitive loads directly and features 35 nV/√Hz input voltage noise density at 1 kHz, making it suitable for high-impedance sensor interfaces where low bias current (±0.5 pA typ) and minimal offset drift (4 µV/°C max) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Dual - enables compact two-signal path designs without cross-talk penalty |
| GBW | 1 MHz - sufficient for buffering 12-bit ADCs like ADS7822 with <5 µs settling |
| IQ per channel | 45 µA - allows continuous operation on coin-cell batteries for years in portable safety devices |
| Input bias current | ±0.5 pA - preserves signal integrity from high-Z sources (e.g., electret mics, gas sensors) |
| Rail-to-rail I/O | Input: (V–) – 0.2 V to (V+) + 0.2 V; Output: within 18 mV of rails (RL = 100 kΩ) - maximizes dynamic range on 3.3 V or 5 V supplies |
| Operating temp | –40°C to +125°C - qualified for under-hood automotive and industrial environmental monitoring |
| Supply voltage | 2.1 V to 5.5 V - compatible with Li-ion, alkaline, and regulated 3.3 V/5 V rails |
Pinout & Package
OPA2348AIDCNRG4 is housed in an 8-pin SOT-23 (DCN) package measuring 2.90 mm × 1.63 mm, optimized for space-constrained PCB layouts in portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives ADC input or next-stage filter with rail-to-rail swing |
| 2 | –IN A | Inverting input, channel A - accepts feedback for precision gain configuration |
| 3 | +IN A | Noninverting input, channel A - connects to high-impedance sensor node |
| 4 | V– | Negative supply - tied to GND in single-supply systems; establishes reference for rail-to-rail operation |
| 5 | +IN B | Noninverting input, channel B - independent signal path for dual-sensor or differential pair |
| 6 | –IN B | Inverting input, channel B - supports separate feedback network for channel B |
| 7 | OUT B | Amplifier B output - provides second buffered analog path without additional IC |
| 8 | V+ | Positive supply - powers both amplifiers; bypassing with 0.1 µF ceramic capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 45 µA per amplifier enables multi-year battery life in always-on safety sensors |
| Extended input common-mode range | Operates 200 mV beyond supply rails - eliminates level-shifting for 0–VREF sensor outputs |
| Low input bias current | 0.5 pA typ minimizes voltage error across MΩ-level source impedances (e.g., pH electrodes) |
| Unity-gain stable | No external compensation needed - simplifies layout for gain-of-1 buffer and active filters |
| High PSRR/CMRR | 175 µV/V PSRR and 82 dB CMRR suppress supply noise and common-mode interference in noisy environments |
Applications
| Smoke Detector Signal Conditioning | CO Gas Sensor Amplifier |
|---|---|
Use Scenario: Amplifying weak ionization current from smoke chamber into clean, rail-to-rail voltage for ADC sampling. IC Role / Device Role / Timing Role: Dual-channel OPA2348AIDCNRG4 buffers and scales two independent detection paths while rejecting supply ripple. Use Value: 0.5 pA input bias prevents signal loss across GΩ smoke chamber impedance; 45 µA IQ extends battery life beyond 5 years. | Use Scenario: Conditioning electrochemical CO sensor output (nA-level current) into 0–3.3 V range for microcontroller ADC. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) front-end with rail-to-rail output driving ADS7822 12-bit ADC. Use Value: Rail-to-rail input accepts sensor zero-bias voltage; 1 MHz GBW ensures <1 µs step response for fast gas concentration changes. |
| Portable Medical Pulse Oximetry | Industrial Temperature Monitoring |
Use Scenario: Amplifying red/IR photodiode signals in battery-powered pulse oximeters with strict power budget. IC Role / Device Role / Timing Role: Dual TIA channel - one for red LED, one for IR LED - sharing single 3.3 V supply. Use Value: Dual-channel integration reduces board area by 40% vs discrete op amps; 125°C rating supports sterilization cycles. | Use Scenario: Buffering RTD or thermistor bridge outputs in factory-floor temperature transmitters. IC Role / Device Role / Timing Role: Precision gain stage before sigma-delta ADC, operating from 24 V loop-powered supply via LDO. Use Value: 4 µV/°C max offset drift maintains ±0.1°C accuracy over –40°C to +85°C ambient; 2.1 V min supply supports brownout resilience. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6022-I/SN | Higher IQ (100 µA), lower GBW (10 MHz), same 2.7–5.5 V supply range | Better AC performance but 2.2× higher power draw limits battery life | Select when bandwidth >1 MHz is required and supply current <45 µA is not critical |
| TLV2462IDR | Higher IQ (550 µA), wider supply (2.7–6 V), rail-to-rail output only (not input) | Lacks rail-to-rail input - requires level-shifting for 0 V referenced sensors | Select for cost-sensitive industrial designs where input range beyond rails is unnecessary |
Compared with MCP6022-I/SN and TLV2462IDR, OPA2348AIDCNRG4 uniquely balances ultra-low power (45 µA), rail-to-rail input *and* output, and –40°C to +125°C operation - making it the only option qualified for long-life, wide-temperature, single-supply safety-critical sensor nodes.
Availability
OPA2348AIDCNRG4 is available at Aetrix Electronics and suitable for smoke alarm manufacturing, portable medical device production, and industrial gas detector design requiring stable component supply across extended temperature ranges and multi-year lifecycle commitments.
Supply support for OPA2348AIDCNRG4 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 delivering analog and embedded processing solutions, with over 50 years of innovation in precision amplifiers and signal chain components.
The OPAx348 product line was engineered specifically for ultra-low-power, single-supply sensor interface and ADC driver applications in portable and safety-critical equipment - prioritizing rail-to-rail operation, nanoampere input bias, and extended temperature reliability.
FAQ
What is the maximum capacitive load the OPA2348AIDCNRG4 can drive in unity-gain configuration?
The OPA2348AIDCNRG4 can directly drive up to 250 pF of pure capacitive load in unity-gain configuration while maintaining stability. For larger loads, a 10–20 Ω series resistor at the output improves phase margin without degrading DC accuracy - a technique validated in TI's SBOS213H datasheet Figure 22. This capability makes OPA2348AIDCNRG4 suitable for driving ADC input capacitance and long PCB traces in compact sensor modules.
Does the OPA2348AIDCNRG4 support rail-to-rail input voltage beyond the supply rails?
Yes - the OPA2348AIDCNRG4 features a complementary input stage enabling a common-mode input range from (V–) – 0.2 V to (V+) + 0.2 V. Inputs may safely extend up to 0.5 V beyond the rails if current-limited to ≤10 mA, as specified in Absolute Maximum Ratings. This eliminates level-shifting circuitry for sensors with outputs near ground or VCC, a key advantage in OPA2348AIDCNRG4-based smoke and gas detector designs.
What is the typical input offset voltage drift of the OPA2348AIDCNRG4 over temperature?
The OPA2348AIDCNRG4 has a maximum input offset voltage drift of 4 µV/°C across the full –40°C to +125°C operating range, as specified in Section 6.7 of the SBOS213H datasheet. This low drift ensures minimal calibration drift in precision sensor front-ends - critical for maintaining accuracy in battery-operated CO detectors and medical instruments where recalibration is impractical.
Can the OPA2348AIDCNRG4 operate from a 2.1 V supply?
Yes - the OPA2348AIDCNRG4 is fully specified and tested down to 2.1 V supply voltage, with all electrical characteristics guaranteed across 2.1 V to 5.5 V. This enables direct operation from single alkaline cells or low-dropout regulators in space-constrained portable devices, distinguishing OPA2348AIDCNRG4 from many competing op amps rated only down to 2.7 V.
Is the OPA2348AIDCNRG4 pin-compatible with other members of the OPAx348 family?
No - the OPA2348AIDCNRG4 uses an 8-pin SOT-23 (DCN) package with dedicated dual-channel pinout (pins 1–3, 5–8 assigned), whereas OPA348 (single) uses 5-pin SOT-23 or SC70, and OPA4348 (quad) uses 14-pin TSSOP or SOIC. Pin mapping is unique to channel count and package; OPA2348AIDCNRG4 is not a drop-in replacement for OPA348 or OPA4348 without PCB redesign.
OPA2348AIDCNRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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-23-8
OPA2348AIDCNRG4 FAQ
1.How can I place an order for OPA2348AIDCNRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2348AIDCNRG4 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 OPA2348AIDCNRG4 reliable?
The price and inventory of OPA2348AIDCNRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2348AIDCNRG4 is usually 5 days.
3.What payment methods are accepted for OPA2348AIDCNRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2348AIDCNRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2348AIDCNRG4?
OPA2348AIDCNRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2348AIDCNRG4 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 OPA2348AIDCNRG4?
For technical support, including OPA2348AIDCNRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2348AIDCNRG4 requirements.
6.How does Aetrix verify that OPA2348AIDCNRG4 is sourced from the original manufacturer or authorized distributors?
All OPA2348AIDCNRG4 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 OPA2348AIDCNRG4 meets industry standards.
7.What is the process for return or replacement of OPA2348AIDCNRG4?
All OPA2348AIDCNRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2348AIDCNRG4, 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 OPA2348AIDCNRG4 part is unused and in its original packaging.
Return procedure for OPA2348AIDCNRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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