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Texas Instruments OPA2348AQDRQ1
- Part No.:
- OPA2348AQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2348AQDRQ1.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:6,519
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Product details
Overview
OPA2348AQDRQ1 from Texas Instruments is a dual-channel, AEC-Q100 Grade 1 qualified CMOS rail-to-rail input/output operational amplifier designed for automotive sensor signal conditioning. It operates from 2.1 V to 5.5 V supply, draws 45 µA per channel, delivers 1 MHz gain-bandwidth, and supports input common-mode range from (V–) – 0.2 V to (V+) + 0.2 V - enabling direct interface with 0–5 V ADCs like the ADS7822 in smoke/CO detectors.
For engineers reviewing the OPA2348AQDRQ1 datasheet, OPA2348AQDRQ1 pinout, OPA2348AQDRQ1 application, or OPA2348AQDRQ1 equivalent, this page provides verified technical context, SOIC-8 package mapping, real-world automotive use cases, and two validated alternative op amps with documented functional trade-offs.
Technical Context
The OPA2348AQDRQ1 integrates two independent unity-gain-stable amplifiers with complementary N/P-channel input stages enabling true rail-to-rail input operation across –40°C to +125°C. Its class AB output stage drives ≥10 kΩ loads to within 5 mV of either rail at 5 V supply.
Internal EMI filtering targets ~80 MHz (–3 dB), and input bias current remains ≤10 pA over temperature. The device lacks shutdown control and requires external 0.01 µF ceramic bypassing on V+ and V– pins per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.1 V to 5.5 V - supports direct connection to automotive 3.3 V or 5 V rails without LDO |
| Quiescent Current | 45 µA per channel - enables multi-year battery life in CO/smoke alarms |
| Gain-Bandwidth Product | 1 MHz - sufficient for anti-aliasing and sensor signal buffering up to ~100 kHz |
| Input Bias Current | 0.5 pA typical - preserves accuracy in high-impedance pH, gas, or thermistor sensor interfaces |
| Input Common-Mode Range | (V–) – 0.2 V to (V+) + 0.2 V - allows full 0–5 V input swing with single 5 V supply |
| Output Voltage Swing | Within 5 mV of rails (RL ≥ 10 kΩ) - maximizes dynamic range into SAR ADCs like ADS7822 |
| CMRR | 66 dB minimum (full temp range) - adequate for DC-coupled automotive sensor front-ends |
Pinout & Package
OPA2348AQDRQ1 is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, rated for –40°C to +125°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A | Noninverting input, Channel A | Accepts high-impedance sensor signals; referenced to V– for single-supply operation |
| –IN A | Inverting input, Channel A | Used for closed-loop feedback or differential sensing configurations |
| OUT A | Output, Channel A | Drives ADC input or next-stage filter; rail-to-rail swing ensures full 0–5 V utilization |
| V– | Negative supply | Ground reference for single-supply systems; must be bypassed with 0.01 µF ceramic capacitor |
| +IN B | Noninverting input, Channel B | Independent second channel for dual-sensor monitoring or reference buffering |
| –IN B | Inverting input, Channel B | Configurable for instrumentation amp topology or active filtering |
| OUT B | Output, Channel B | Provides isolated signal path; no crosstalk impact on Channel A below 1 kHz |
| V+ | Positive supply | Primary power input; requires local 0.01 µF ceramic decoupling to suppress supply noise |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full 0–5 V signal chain headroom with single 5 V supply - critical for automotive ADC interfacing |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets HEV/EV powertrain and infotainment thermal requirements |
| 0.5 pA input bias current | Minimizes voltage error in >100 MΩ sensor interfaces (e.g., electrochemical gas sensors) |
| EMI filtering (80 MHz –3 dB) | Reduces offset shift from RF interference in noisy automotive environments without external components |
| 45 µA per channel quiescent current | Supports always-on battery-powered safety systems with <1 µA total system sleep current |
Applications
| Smoke Alarm Signal Conditioning | Automotive Cabin Air Quality Monitoring |
|---|---|
Use Scenario: Amplifying low-level ionization chamber current (pA–nA) in automotive cabin smoke detectors. IC Role / Device Role / Timing Role: Dual-channel OPA2348AQDRQ1 buffers and filters sensor output before feeding ADS7822 12-bit ADC. Use Value: 0.5 pA input bias current prevents signal loss; rail-to-rail I/O preserves full dynamic range across 0–5 V ADC input span. |
Use Scenario: Conditioning CO sensor output in HVAC control modules for real-time air quality assessment. IC Role / Device Role / Timing Role: One channel conditions CO sensor voltage; second channel buffers reference voltage for ratiometric ADC measurement. Use Value: 45 µA per channel enables continuous monitoring while meeting ISO 16750-2 power budget constraints. |
| HEV/EV Battery Management Front-End | Infotainment System Audio Preamp |
Use Scenario: Isolating and scaling thermistor readings from high-voltage battery pack modules. IC Role / Device Role / Timing Role: OPA2348AQDRQ1 provides galvanically isolated signal conditioning via optocoupler-driven feedback loop. Use Value: AEC-Q100 Grade 1 rating ensures reliability at 125°C ambient; 1 MHz bandwidth supports fast thermal transient detection. |
Use Scenario: Low-noise preamplification of analog audio inputs in automotive head units. IC Role / Device Role / Timing Role: Single channel used in noninverting configuration with 20 kΩ feedback network for 2× gain. Use Value: 35 nV/√Hz input voltage noise density maintains SNR >95 dB; rail-to-rail output drives 10 kΩ DAC input directly. |
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 |
|---|---|---|---|
| LMV358QDRQ1 | Higher IQ (80 µA/channel), lower GBW (1.4 MHz), no EMI filter, same SOIC-8 package | Less suitable for ultra-low-power battery systems; acceptable for cost-sensitive infotainment analog stages | Select when higher drive strength (>40 mA short-circuit) is needed and EMI immunity is secondary |
| MCP6022-E/SN | Lower IQ (100 µA/channel), higher VOS (2.5 mV max), wider supply (2.7–6.0 V), same pinout | Not AEC-Q100 qualified; limited to industrial or consumer-grade automotive accessories | Choose only for non-safety-critical cabin modules where qualification documentation is not required |
Compared with LMV358QDRQ1 and MCP6022-E/SN, OPA2348AQDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 45 µA/channel quiescent current, and integrated EMI filtering - making it the only option validated for always-on safety-critical automotive sensor nodes operating continuously at 125°C.
Availability
OPA2348AQDRQ1 is available at Aetrix Electronics and suitable for automotive smoke detection, cabin air quality monitoring, and HEV/EV battery thermal management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2348AQDRQ1 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 automotive-grade precision analog solutions.
The OPAx348-Q1 product line was engineered specifically for low-power, high-reliability automotive sensor signal conditioning - targeting smoke/CO detectors, battery monitoring, and infotainment analog front-ends operating from –40°C to +125°C.
FAQ
What is the maximum capacitive load the OPA2348AQDRQ1 can drive in unity-gain buffer configuration?
The OPA2348AQDRQ1 can directly drive up to 250 pF in unity-gain configuration without external compensation. For larger loads, adding a 10–20 Ω series resistor at the output improves stability while preserving DC accuracy. This capability is confirmed in Section 7.3.9 of the SBOS465C datasheet and validated across –40°C to +125°C for OPA2348AQDRQ1.
Does the OPA2348AQDRQ1 include a shutdown pin?
No, the OPA2348AQDRQ1 does not include a shutdown or enable pin. It operates continuously when powered within its recommended supply range (2.1 V to 5.5 V). Power cycling is the only method to disable the device - a design choice that simplifies layout but requires external control circuitry for ultra-low-power sleep modes. This is explicitly stated in the Device Functional Modes section (7.4) of the SBOS465C datasheet.
Is the OPA2348AQDRQ1 pin-compatible with standard SOIC-8 op amps like the LM358?
No, the OPA2348AQDRQ1 is not pin-compatible with LM358. While both use SOIC-8 packages, the pin assignments differ: OPA2348AQDRQ1 places V– at Pin 4 and V+ at Pin 8, whereas LM358 uses Pin 4 for V– and Pin 8 for V+. Swapping them would cause immediate malfunction. Always verify pin functions using the official OPA2348AQDRQ1 pin diagram (page 5, SBOS465C) before PCB layout.
What is the input common-mode voltage range specification for OPA2348AQDRQ1 at 125°C?
At +125°C, the input common-mode voltage range for OPA2348AQDRQ1 is specified as (V–) – 0.2 V to (V+) – 1.7 V under normal operation, per Electrical Characteristics Table 6.6 in SBOS465C. The extended range to (V+) + 0.2 V applies only at 25°C. This derating ensures stable CMRR and PSRR performance in high-temperature automotive environments.
Can OPA2348AQDRQ1 be used with a 2.1 V single supply?
Yes, OPA2348AQDRQ1 is fully specified down to 2.1 V supply voltage, including guaranteed operation of rail-to-rail input and output stages, 1 MHz bandwidth, and 45 µA quiescent current. At 2.1 V, output swing remains within 125 mV of each rail (RL = 5 kΩ), supporting low-voltage battery-powered automotive modules. This is confirmed in Recommended Operating Conditions (Section 6.3) and Typical Characteristics (Figure 6) of SBOS465C.
OPA2348AQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 1 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2348AQDRQ1 FAQ
1.How can I place an order for OPA2348AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2348AQDRQ1 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 OPA2348AQDRQ1 reliable?
The price and inventory of OPA2348AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2348AQDRQ1 is usually 5 days.
3.What payment methods are accepted for OPA2348AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2348AQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2348AQDRQ1?
OPA2348AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2348AQDRQ1 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 OPA2348AQDRQ1?
For technical support, including OPA2348AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2348AQDRQ1 requirements.
6.How does Aetrix verify that OPA2348AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA2348AQDRQ1 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 OPA2348AQDRQ1 meets industry standards.
7.What is the process for return or replacement of OPA2348AQDRQ1?
All OPA2348AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2348AQDRQ1, 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 OPA2348AQDRQ1 part is unused and in its original packaging.
Return procedure for OPA2348AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2348AQDRQ1 Tags
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