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Texas Instruments OPA348AQDRQ1
- Part No.:
- OPA348AQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA348AQDRQ1.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,715
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Product details
Overview
OPA348AQDRQ1 from Texas Instruments is an automotive-grade, single-channel CMOS rail-to-rail input/output operational amplifier optimized for low-power sensor signal conditioning in 2.1 V to 5.5 V single-supply systems. It delivers 1 MHz gain-bandwidth, 45 µA quiescent current, 0.5 pA input bias current, and rail-to-rail output swing within 100 mV of both rails under 10 kΩ load - enabling direct interface with 12-bit ADCs like ADS7822 in smoke/CO detectors and HEV powertrain monitoring.
For engineers reviewing the OPA348AQDRQ1 datasheet, OPA348AQDRQ1 pinout, OPA348AQDRQ1 application, or OPA348AQDRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), ultra-low IQ for battery-powered automotive sensors, verified EMI rejection ratio (EMIRR), and validated stability driving capacitive loads up to 250 pF in unity-gain buffer configurations.
Technical Context
The OPA348AQDRQ1 uses a complementary N/P-channel input stage enabling true rail-to-rail input operation from (V–) – 0.2 V to (V+) + 0.2 V, with a defined transition region near (V+) – 1.3 V where CMRR and PSRR degrade. Its class AB output stage drives resistive loads ≤10 kΩ while maintaining ≥90 dB open-loop gain and <0.0023% THD+N at 1 kHz.
Internally filtered for EMI immunity (–3 dB at ~80 MHz), it features integrated input protection diodes rated for ±2000 V HBM and ±500 V CDM ESD, and operates reliably across full automotive temperature range without external shutdown control - unlike dual-supply op-amps requiring explicit enable logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.1 V to 5.5 V single supply - supports direct connection to 3.3 V or 5 V automotive domains without level-shifting. |
| Gain-Bandwidth Product | 1 MHz - sufficient for anti-aliasing filtering and sensor signal amplification prior to 100 kSPS ADC sampling. |
| Quiescent Current | 45 µA typical - enables multi-year battery life in portable CO/smoke alarms with intermittent wake-up cycles. |
| Input Bias Current | 0.5 pA typical - preserves signal integrity in high-impedance pH, gas, or thermopile sensor interfaces. |
| Input Common-Mode Range | (V–) – 0.2 V to (V+) + 0.2 V - allows direct sensing of ground-referenced signals (e.g., shunt voltage) in single-supply systems. |
| Output Voltage Swing | Within 100 mV of rails at 10 kΩ - maximizes dynamic range when driving SAR ADCs like ADS7822 with 0–5 V input range. |
| EMI Rejection Ratio | Internal 80 MHz low-pass filter - mitigates RF rectification-induced offset shift in infotainment-adjacent modules. |
Pinout & Package
OPA348AQDRQ1 is packaged in SOIC-8 (D package), 4.90 mm × 3.91 mm body size, with thermal resistance RθJA = 142.0°C/W. Pin functions are electrically identical to OPA348-Q1 in SOIC-8 configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 3) | Noninverting input | Accepts sensor signals referenced to V–; supports rail-to-rail common-mode range including ground. |
| –IN (Pin 2) | Inverting input | Used for precision inverting gain stages or feedback node in transimpedance configurations. |
| OUT (Pin 6) | Amplifier output | Drives ADC input or RC filter; rail-to-rail swing ensures full utilization of 12-bit converter range. |
| V+ (Pin 7) | Positive supply | Connects to 2.1–5.5 V domain; requires 0.01 µF ceramic bypass capacitor per TI layout guidelines. |
| V– (Pin 4) | Negative supply / ground reference | Typically connected to system ground; supports true single-supply operation with no negative rail needed. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets thermal requirements for engine bay and powertrain ECUs. |
| Rail-to-rail input and output | Enables direct interfacing with unipolar sensors and 0–5 V ADCs without external level-shifting circuitry. |
| Ultra-low input bias current (0.5 pA) | Maintains accuracy in high-Z sensor front-ends (e.g., electrochemical gas cells) without leakage-induced offset. |
| EMI-hardened input stage | Integrated 80 MHz low-pass filter reduces RF-induced DC offset drift in noisy automotive environments. |
| Stable with 250 pF capacitive load | Eliminates need for external isolation resistor in ADC driver applications - simplifies layout and saves BOM cost. |
Applications
| Smoke Alarms | HEV/EV Battery Monitoring |
|---|---|
Use Scenario: Amplifying weak ionization current from smoke chamber electrodes into measurable voltage for microcontroller ADC sampling. IC Role / Device Role / Timing Role: Precision transimpedance amplifier converting pA-level currents to 0–5 V output compatible with ADS7822. Use Value: 0.5 pA input bias current prevents signal corruption; rail-to-rail output ensures full 12-bit ADC code utilization across battery voltage range. |
Use Scenario: Conditioning voltage signals from cell-balancing shunt resistors in 400 V battery packs for isolated ADC acquisition. IC Role / Device Role / Timing Role: Single-supply buffer isolating high-side shunt measurements from MCU domain while rejecting common-mode noise. Use Value: 1 MHz bandwidth supports fast transient response during charge/discharge events; 45 µA IQ minimizes parasitic drain on auxiliary 12 V rail. |
| Infotainment Audio Preamp | Medical Patient Monitor Sensors |
Use Scenario: Low-noise amplification of microphone or line-in signals in automotive head units before analog-to-digital conversion. IC Role / Device Role / Timing Role: Rail-to-rail I/O audio preamplifier operating from 3.3 V supply with minimal external components. Use Value: 35 nV/√Hz input voltage noise density and <0.0023% THD+N preserve audio fidelity; EMI filtering suppresses GSM/Bluetooth interference. |
Use Scenario: Signal conditioning for disposable ECG/SpO₂ sensor leads in portable patient monitors requiring long battery life. IC Role / Device Role / Timing Role: Ultra-low-power biopotential amplifier front-end with high common-mode rejection for differential lead pairs. Use Value: 70 dB CMRR at DC and 134 dB channel separation prevent crosstalk between multi-lead acquisitions; AEC-Q100 qualification ensures reliability in certified medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV348QDRQ1 | Higher IQ (85 µA), lower GBW (1.4 MHz), same AEC-Q100 Grade 1 rating and SOIC-8 package. | Better suited for higher-speed sensor interfaces but increases battery load in always-on detection systems. | Select LMV348QDRQ1 only if >1 MHz bandwidth is required and 40 µA additional quiescent current is acceptable. |
| TSV911QDBVRQ1 | Lower IQ (38 µA), lower GBW (8 MHz), rail-to-rail I/O, but only specified down to 1.5 V supply - not validated for 2.1 V min. | Optimized for ultra-low-voltage wearable medical sensors, not automotive 2.1 V minimum systems. | TSV911QDBVRQ1 may be used in new designs targeting 1.8 V operation, but OPA348AQDRQ1 remains preferred for legacy 2.1 V–5.5 V compliance. |
Compared with LMV348QDRQ1 and TSV911QDBVRQ1, OPA348AQDRQ1 uniquely balances 1 MHz bandwidth, 45 µA IQ, and guaranteed 2.1 V operation - making it the optimal choice for AEC-Q100-compliant, battery-sensitive automotive sensor nodes where supply margin and longevity are critical.
Availability
OPA348AQDRQ1 is available at Aetrix Electronics and suitable for smoke alarms, HEV/EV battery monitoring, and infotainment audio preamplification requiring stable component supply across extended automotive lifecycles.
Supply support for OPA348AQDRQ1 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 automotive IC design expertise and rigorous AEC-Q100 validation infrastructure.
The OPAx348-Q1 product line was engineered specifically for ultra-low-power, high-precision signal conditioning in automotive safety-critical sensor systems - emphasizing rail-to-rail operation, EMI resilience, and extended temperature reliability.
FAQ
What is the minimum supply voltage for reliable operation of OPA348AQDRQ1?
OPA348AQDRQ1 is fully specified and guaranteed to operate from 2.1 V to 5.5 V over the full –40°C to +125°C automotive temperature range. Below 2.1 V, parameters such as gain-bandwidth, CMRR, and output swing are not characterized or assured - use only within this validated range for AEC-Q100-compliant designs.
Does OPA348AQDRQ1 require external shutdown control in battery-powered applications?
No, OPA348AQDRQ1 has no enable/shutdown pin and operates continuously when powered. For ultra-low-power duty-cycled systems, it must be powered down via system-level supply switching - the device draws only 45 µA typical quiescent current, making external shutdown unnecessary in most automotive sensor nodes.
Can OPA348AQDRQ1 drive the ADS7822 12-bit ADC directly?
Yes, OPA348AQDRQ1 is explicitly validated in TI's SBOS465C datasheet for noninverting configuration driving ADS7822. Its rail-to-rail output swing, 1 MHz bandwidth, and stability with 250 pF capacitive load ensure accurate 12-bit sampling without external buffering or compensation components.
What is the maximum capacitive load OPA348AQDRQ1 can drive in unity-gain buffer mode?
OPA348AQDRQ1 can directly drive up to 250 pF of pure capacitive load in unity-gain configuration while maintaining stability and minimal overshoot. For loads exceeding 250 pF, a 10–20 Ω series resistor at the output restores phase margin without degrading DC accuracy in typical ADC driver applications.
How does the EMI filtering in OPA348AQDRQ1 improve performance in automotive environments?
OPA348AQDRQ1 integrates an internal low-pass filter with ~80 MHz –3 dB cutoff that attenuates RF energy before it reaches sensitive input transistors - reducing EMI-induced DC offset shifts by up to 20× compared to non-filtered op-amps. This is critical for stable operation near infotainment radios or cellular modems.
OPA348AQDRQ1 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:
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA348AQDRQ1 FAQ
1.How can I place an order for OPA348AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA348AQDRQ1 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 OPA348AQDRQ1 reliable?
The price and inventory of OPA348AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA348AQDRQ1 is usually 5 days.
3.What payment methods are accepted for OPA348AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA348AQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA348AQDRQ1?
OPA348AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA348AQDRQ1 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 OPA348AQDRQ1?
For technical support, including OPA348AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA348AQDRQ1 requirements.
6.How does Aetrix verify that OPA348AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA348AQDRQ1 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 OPA348AQDRQ1 meets industry standards.
7.What is the process for return or replacement of OPA348AQDRQ1?
All OPA348AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA348AQDRQ1, 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 OPA348AQDRQ1 part is unused and in its original packaging.
Return procedure for OPA348AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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