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Texas Instruments OPA4348AQPWRQ1
- Part No.:
- OPA4348AQPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4348AQPWRQ1.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:13,165
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Product details
Overview
OPA4348AQPWRQ1 from Texas Instruments is a quad-channel, automotive-grade CMOS rail-to-rail input/output operational amplifier optimized for low-power sensor signal conditioning in HEV/EV powertrain and infotainment systems. It delivers 1 MHz gain-bandwidth, 45 µA per amplifier quiescent current, 0.5 pA typical input bias current, and operates from 2.1 V to 5.5 V single supply across –40°C to +125°C.
For engineers reviewing the OPA4348AQPWRQ1 datasheet, OPA4348AQPWRQ1 pinout, OPA4348AQPWRQ1 application, or OPA4348AQPWRQ1 equivalent, this page provides verified technical context, real-world design meaning of key specs, TSSOP-14 package layout guidance, and two validated alternative parts with functional trade-offs for automotive embedded designs.
Technical Context
The OPA4348AQPWRQ1 integrates four independent amplifiers in a single TSSOP-14 package, each featuring a complementary N/P-channel input stage enabling rail-to-rail input common-mode range from (V–) – 0.2 V to (V+) + 0.2 V. Its class AB output stage supports rail-to-rail swing within 100 mV of rails under 10 kΩ load at 25°C.
It uses internal EMI filtering with ~80 MHz –3 dB cutoff to suppress high-frequency interference, and includes integrated ESD protection (HBM ±2000 V, CDM ±750 V on corner pins). The device is unity-gain stable and drives up to 250 pF capacitive loads directly in G = +1 configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.1 V to 5.5 V single supply - enables direct interface with 3.3 V and 5 V automotive microcontrollers and ADCs like ADS7822. |
| Quiescent Current | 45 µA per amplifier - allows battery-powered CO detectors and smoke alarms to operate >5 years on coin-cell batteries. |
| Gain-Bandwidth Product | 1 MHz - sufficient for anti-aliasing filtering and sensor signal buffering before 12-bit ADC sampling at ≤100 kSPS. |
| Input Bias Current | 0.5 pA typical - preserves accuracy in high-impedance pH, thermopile, or piezoelectric sensor front-ends. |
| Input Common-Mode Range | (V–) – 0.2 V to (V+) + 0.2 V - supports direct sensing of signals referenced to ground or V+ in single-supply systems. |
| Output Swing | Within 100 mV of rails at 10 kΩ load - maximizes dynamic range when driving SAR ADCs such as ADS7822 with 0–5 V input range. |
| ESD Rating | HBM ±2000 V, CDM ±750 V (corner pins) - meets AEC-Q100 Grade 1 requirements for automotive module-level robustness. |
Pinout & Package
TSSOP-14 (PW) package: 5.00 mm × 4.40 mm body, 0.65 mm pitch, exposed pad not present. Designed for automated SMT assembly and thermal performance up to 121 °C/W junction-to-ambient (RθJA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | Accepts high-impedance sensor signals; supports rail-to-rail common-mode operation down to V– – 0.2 V. |
| –IN A (Pin 2) | Inverting input, Channel A | Used for precision inverting configurations; matched with +IN A for <6 µV offset voltage (typical). |
| OUT A (Pin 1) | Output, Channel A | Drives ADC inputs or downstream filters; rail-to-rail swing ensures full utilization of 12-bit ADC reference range. |
| V+ (Pin 4) | Positive supply | Connects to 3.3 V or 5 V rail; requires local 0.1 µF ceramic bypass capacitor to suppress supply noise. |
| V– (Pin 11) | Negative supply / Ground | Typically connected to system ground; supports true single-supply operation with no negative rail needed. |
| +IN B (Pin 5), –IN B (Pin 6) | Noninverting/inverting inputs, Channel B | Independent channel for dual-sensor monitoring (e.g., differential thermocouple + ambient temp reference). |
| OUT B (Pin 7), OUT C (Pin 8), OUT D (Pin 14) | Outputs, Channels B/C/D | Enable multi-channel signal conditioning without board-level routing complexity or additional ICs. |
| +IN C (Pin 10), –IN C (Pin 9) | Inputs, Channel C | Supports simultaneous analog acquisition paths - e.g., motor phase current, voltage, and temperature in EV inverters. |
| +IN D (Pin 12), –IN D (Pin 13) | Inputs, Channel D | Provides fourth channel for redundancy or auxiliary functions like battery cell monitoring in BMS front-ends. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal capture from 0 V to V+ in single-supply systems, eliminating level-shifting circuitry for ADC interfacing. |
| 0.5 pA input bias current | Maintains gain accuracy in high-Z sensor interfaces (e.g., 10 MΩ thermistor networks) without significant voltage error. |
| EMI filtering (80 MHz –3 dB) | Reduces offset shift caused by GSM/Bluetooth/AM radio band interference in infotainment head units and cluster displays. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2000 V and CDM ±750 V - suitable for under-hood and cabin modules. |
| Unity-gain stability | Allows use as buffer without external compensation, simplifying PCB layout and reducing bill-of-materials for sensor front-ends. |
Applications
| HEV/EV Powertrain Sensing | Automotive Infotainment Audio |
|---|---|
|
Use Scenario: Condition signals from current shunts, NTC thermistors, and Hall-effect sensors in traction inverter control modules. IC Role / Device Role / Timing Role: Quad amplifier buffers and gains four independent analog channels prior to multiplexed ADC sampling. Use Value: Single-package integration reduces PCB area by 60% vs discrete op-amps and eliminates inter-channel timing skew in synchronized sampling. |
Use Scenario: Pre-amplify microphone inputs and post-process DAC outputs in digital audio processors for head units. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail I/O amplifier providing gain and DC blocking for analog audio paths. Use Value: 35 nV/√Hz input voltage noise density and THD+N of 0.0023% preserve SNR in 24-bit audio signal chains. |
| Smart Smoke & CO Detectors | Medical Instrumentation Front-End |
|
Use Scenario: Amplify ultra-low-current signals from electrochemical CO sensors and photoionization smoke chambers. IC Role / Device Role / Timing Role: High-input-impedance transimpedance amplifier with programmable gain for analog sensor output conditioning. Use Value: 0.5 pA input bias current prevents sensor polarization drift; 45 µA per amplifier enables >5-year battery life on CR2032 cells. |
Use Scenario: Interface with biopotential electrodes (ECG, EEG) and temperature probes in portable diagnostic devices. IC Role / Device Role / Timing Role: Instrumentation-grade signal conditioner with rail-to-rail input for wide dynamic range biometric acquisition. Use Value: Input common-mode range extending beyond rails allows direct connection to electrode bias networks without external level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV334QDRQ1 | Higher quiescent current (80 µA per amp), lower GBW (1.2 MHz), no EMI filter, same AEC-Q100 Grade 1 rating. | Better drive strength (60 mA short-circuit) but higher power - suited for active filtering where speed > power efficiency. | Select when higher output current or faster settling is required; avoid in ultra-low-power battery applications. |
| TSV914IQDT | Lower IQ (38 µA), lower VOS (1.6 mV typ), no AEC-Q100 qualification, industrial temp range only (–40°C to +125°C). | Not qualified for automotive use; lacks HBM/CDM ESD validation for harsh vehicle environments. | Use only in non-automotive industrial or medical designs where AEC-Q100 is not mandated. |
Compared with OPA4348AQPWRQ1, LMV334QDRQ1 trades 78% higher supply current for greater output drive, while TSV914IQDT offers lower offset and power but omits automotive qualification and EMI hardening - making OPA4348AQPWRQ1 the only option meeting full AEC-Q100 Grade 1 + EMI resilience + ultra-low IQ in quad configuration.
Availability
OPA4348AQPWRQ1 is available at Aetrix Electronics and suitable for HEV/EV powertrain sensing, automotive infotainment audio, and smart smoke/CO detector designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4348AQPWRQ1 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, industrial, and personal electronics markets.
The OPAx348-Q1 product line was designed specifically for ultra-low-power, high-precision signal conditioning in automotive safety-critical and battery-constrained systems - emphasizing rail-to-rail operation, AEC-Q100 compliance, and EMI robustness.
FAQ
What is the operating temperature range for OPA4348AQPWRQ1?
The OPA4348AQPWRQ1 is qualified for automotive Grade 1 operation, supporting continuous operation from –40°C to +125°C ambient temperature. This range is validated per AEC-Q100 and applies across the full 2.1 V to 5.5 V supply voltage range, making it suitable for under-hood and cabin-mounted electronic control units.
Does OPA4348AQPWRQ1 support rail-to-rail input and output simultaneously?
Yes, OPA4348AQPWRQ1 supports rail-to-rail input common-mode range from (V–) – 0.2 V to (V+) + 0.2 V and rail-to-rail output swing within 100 mV of both rails under 10 kΩ load. This enables full dynamic range utilization in single-supply systems such as those interfacing with the ADS7822 12-bit ADC.
What is the maximum capacitive load OPA4348AQPWRQ1 can drive in unity-gain configuration?
OPA4348AQPWRQ1 can directly drive up to 250 pF of pure capacitive load in unity-gain configuration while maintaining stability. For larger loads, a 10 Ω to 20 Ω series resistor at the output improves phase margin without degrading DC accuracy - a technique validated in TI's SBOS465C datasheet Figure 24.
Is OPA4348AQPWRQ1 pin-compatible with other members of the OPAx348-Q1 family?
No, OPA4348AQPWRQ1 is not pin-compatible with OPA2348-Q1 (SOIC-8) or OPA348-Q1 (SOT-23-5 or SOIC-8). It uses the TSSOP-14 (PW) package with 14 pins and a unique 4-channel pinout. Board layout must be designed specifically for PW package dimensions and terminal assignments shown in the datasheet.
How does the internal EMI filter in OPA4348AQPWRQ1 improve system reliability?
The OPA4348AQPWRQ1 incorporates an internal low-pass EMI filter with ~80 MHz –3 dB cutoff that attenuates high-frequency interference from cellular, Wi-Fi, and AM/FM bands. This prevents rectification-induced DC offset shifts at the output - critical for stable sensor readings in automotive infotainment and instrument cluster applications.
OPA4348AQPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 8 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 45µA (x4 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:
- 14-TSSOP
OPA4348AQPWRQ1 FAQ
1.How can I place an order for OPA4348AQPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4348AQPWRQ1 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 OPA4348AQPWRQ1 reliable?
The price and inventory of OPA4348AQPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4348AQPWRQ1 is usually 5 days.
3.What payment methods are accepted for OPA4348AQPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4348AQPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4348AQPWRQ1?
OPA4348AQPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4348AQPWRQ1 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 OPA4348AQPWRQ1?
For technical support, including OPA4348AQPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4348AQPWRQ1 requirements.
6.How does Aetrix verify that OPA4348AQPWRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA4348AQPWRQ1 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 OPA4348AQPWRQ1 meets industry standards.
7.What is the process for return or replacement of OPA4348AQPWRQ1?
All OPA4348AQPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4348AQPWRQ1, 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 OPA4348AQPWRQ1 part is unused and in its original packaging.
Return procedure for OPA4348AQPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4348AQPWRQ1 Tags
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