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Diodes Incorporated AS348W5-7
- Part No.:
- AS348W5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AS348W5-7.pdf
- Description:
- OPAMP GENERAL PURPOSE SOT25 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,676
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Product details
Overview
AS348W5-7 from Diodes Incorporated is a single-channel, rail-to-rail input/output (RRIO) CMOS operational amplifier optimized for low-noise, low-power precision signal conditioning. It delivers 1 MHz gain bandwidth, 70 μA supply current per channel, 27 nV/√Hz input voltage noise, 0.5 mV typical input offset voltage, and operates from 1.6 V to 5.5 V single supply - enabling use in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the AS348W5-7 datasheet, AS348W5-7 pinout, AS348W5-7 application, or AS348W5-7 equivalent, key selection criteria include its 1 pA input bias current at 25°C, rail-to-rail output swing within 3–25 mV of supply rails (load-dependent), ±0.8 V to ±2.5 V dual-supply compatibility, unity-gain stability with up to 100 pF capacitive load, and operation across –40°C to +125°C ambient temperature.
Technical Context
The AS348W5-7 implements a Class AB output stage with rail-to-rail input common-mode range extending 300 mV beyond the supply rails at 3 V or 5 V. Its internal architecture supports stable operation under varying supply conditions (1.6–5.5 V) and maintains precision performance across temperature via low 2 μV/°C input offset drift.
It achieves unity-gain stability without external compensation while delivering 0.45 V/μs slew rate at 5 V supply and preserves signal fidelity with –70 dB THD+N at 1 kHz, 1 VPP output into 10 kΩ with 100 pF load - critical for photodiode transimpedance and active filter stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 1.0 MHz - enables stable closed-loop operation up to 100 kHz with gain ≥10, suitable for sensor front-end filtering and buffering. |
| Supply Current per Channel | 70 μA (typ) - allows continuous operation for >1 year on a CR2032 coin cell in low-duty-cycle portable devices. |
| Input Voltage Noise Density | 27 nV/√Hz at 1 kHz - minimizes added noise in high-gain photodiode or strain gauge amplification paths. |
| Input Offset Voltage | 0.5 mV (typ), 2.5 mV (max) - ensures ≤0.1% error in 5 V full-scale medical analog front-ends without trimming. |
| Rail-to-Rail Output Swing | Within 3 mV of rail (10 kΩ load), 25 mV (1 kΩ load) - maximizes dynamic range in single-supply 3.3 V or 5 V systems. |
| Input Bias Current | 1 pA (typ) at 25°C - prevents significant voltage error across high-impedance sources (>100 MΩ), e.g., pH electrodes or piezoelectric sensors. |
| Operating Temperature Range | –40°C to +125°C - supports deployment in automotive cabin modules, industrial controllers, and outdoor environmental monitors. |
Pinout & Package
SOT25 (5-pin SC-74A) package: compact surface-mount outline with exposed pad for thermal enhancement; footprint compatible with automated placement and reflow.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT | Amplifier output node; drives loads up to 100 mA sink/source capability at 5 V supply; rail-to-rail swing enables full utilization of ADC input range. |
| 2 | VEE | Negative supply terminal; tied to ground in single-supply configurations; supports true dual-supply operation down to ±0.8 V. |
| 3 | IN+ | Non-inverting input; accepts common-mode voltages from –0.3 V to VCC + 0.3 V, enabling direct interfacing with sensors operating near supply rails. |
| 4 | VCC | Positive supply terminal; operates from 1.6 V to 5.5 V; low quiescent current ensures efficiency in energy-constrained designs. |
| 5 | IN− | Inverting input; matched to IN+ for low input offset; high impedance (1 pA bias) avoids loading of high-Z transducer outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input with 300 mV beyond rail | Enables accurate sensing of signals near ground or VCC in single-supply systems without level-shifting circuitry. |
| 1 pA input bias current (25°C) | Preserves signal integrity from ultra-high-impedance sources such as ion-selective electrodes and MEMS microphones. |
| 0.5 mV typical input offset voltage | Reduces need for system-level calibration in portable glucose meters and pulse oximeters where accuracy <1% is required. |
| Unity-gain stable with 100 pF load | Eliminates need for external compensation in transimpedance amplifier configurations using photodiodes with parasitic capacitance. |
| –40°C to +125°C operation | Validates suitability for under-hood automotive sensors and industrial motor control feedback loops without derating. |
Applications
| Photodiode Amplification | Portable Medical Sensors |
|---|---|
|
Use Scenario: Converting weak current from silicon photodiodes in pulse blood oximeters into amplified voltage signals. IC Role / Device Role / Timing Role: Transimpedance amplifier with low input bias current and low noise density to preserve SNR in sub-μA photocurrent detection. Use Value: 1 pA input bias avoids signal loss across high-value feedback resistors; 27 nV/√Hz noise ensures resolution of <1% SpO₂ changes. |
Use Scenario: Signal conditioning for electrochemical glucose test strips in handheld meters. IC Role / Device Role / Timing Role: Precision buffer and reference amplifier driving 12-bit SAR ADC inputs with minimal offset drift over temperature. Use Value: 2 μV/°C offset drift limits calibration drift to <0.5 mV over –20°C to +50°C operating range; RRIO swing maximizes ADC utilization. |
| Battery-Powered Smoke Alarms | Low-Voltage Active Filters |
|
Use Scenario: Amplifying ionization chamber current in UL-listed residential smoke detectors powered by 9 V alkaline batteries. IC Role / Device Role / Timing Role: Ultra-low-power front-end amplifier maintaining sensitivity during 10-year shelf life and intermittent self-test cycles. Use Value: 70 μA supply current extends battery life beyond 5 years; wide 1.6–5.5 V supply range accommodates battery discharge curve without regulation. |
Use Scenario: Implementing 2nd-order Sallen-Key low-pass filters in portable audio codecs and sensor data acquisition. IC Role / Device Role / Timing Role: Unity-gain stable op-amp with 1 MHz GBW supporting cutoff frequencies up to 100 kHz with minimal phase distortion. Use Value: Stable response with 100 pF capacitive load eliminates need for isolation resistors; low THD+N (–70 dB) preserves audio/signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-power RRIO op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-E/OT (Microchip) | Lower GBW (1 MHz same), higher input bias current (100 pA typ), no extended common-mode range beyond rail. | Limited to standard rail-to-rail input (not beyond rail); less suitable for sensors biased near supply rails. | Select when cost sensitivity outweighs need for extended input range and ultra-low bias current. |
| TSV911ICT (STMicroelectronics) | Higher supply current (160 μA), lower noise (14 nV/√Hz), same 1 MHz GBW, but only rated to +85°C ambient. | Not qualified for automotive or industrial high-temp environments requiring operation to +125°C. | Prefer for battery-powered consumer audio where noise dominates, but avoid in extended temperature deployments. |
Compared with MCP6001T-E/OT and TSV911ICT, the AS348W5-7 uniquely combines 1 pA input bias, 300 mV beyond-rail input range, and full –40°C to +125°C qualification - making it the only option among the three for high-impedance, wide-temperature, single-supply precision sensing.
Availability
AS348W5-7 is available at Aetrix Electronics and suitable for battery-powered medical devices, industrial environmental sensors, and automotive cabin air quality monitors requiring stable component supply across long production lifecycles.
Supply support for AS348W5-7 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
Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal ICs, with emphasis on power management, signal integrity, and precision analog solutions.
The AS348W5-7 belongs to Diodes' precision op-amp product line, engineered specifically for ultra-low-power, high-accuracy signal conditioning in space- and energy-constrained applications including portable healthcare and industrial IoT endpoints.
FAQ
Is the AS348W5-7 qualified for automotive applications?
No - the AS348W5-7 is not AEC-Q100 qualified. While it operates from –40°C to +125°C and features 4 kV HBM ESD protection, Diodes specifies separate automotive-grade variants (e.g., AS348Q) for PPAP-capable, IATF 16949-manufactured applications requiring formal automotive qualification.
What is the maximum capacitive load the AS348W5-7 can drive while remaining unity-gain stable?
The AS348W5-7 is unity-gain stable with up to 100 pF capacitive load, as verified in the datasheet's AC electrical characteristics and phase margin plots. Driving larger loads requires isolation resistance or external compensation to maintain stability and prevent peaking or oscillation.
Does the AS348W5-7 support dual-supply operation?
Yes - the AS348W5-7 supports dual-supply operation from ±0.8 V to ±2.5 V. Pin 2 (VEE) serves as the negative supply, and Pin 4 (VCC) as the positive supply; common-mode input range and output swing are specified relative to both rails in dual-supply mode.
How does the input common-mode voltage range extend beyond the supply rails?
The AS348W5-7 achieves 300 mV beyond-rail input capability using specialized input stage circuitry that biases internal differential pairs beyond conventional CMOS gate thresholds - allowing valid operation with inputs at –0.3 V (below VEE) or VCC + 0.3 V (above VCC) at 3 V or 5 V supplies.
AS348W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 1
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 0.45V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 70µA
- Current - Output / Channel:
- 185 mA
- Voltage - Supply Span (Min):
- 1.6 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AS348W5-7 FAQ
1.How can I place an order for AS348W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS348W5-7 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 AS348W5-7 reliable?
The price and inventory of AS348W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS348W5-7 is usually 5 days.
3.What payment methods are accepted for AS348W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS348W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS348W5-7?
AS348W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS348W5-7 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 AS348W5-7?
For technical support, including AS348W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS348W5-7 requirements.
6.How does Aetrix verify that AS348W5-7 is sourced from the original manufacturer or authorized distributors?
All AS348W5-7 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 AS348W5-7 meets industry standards.
7.What is the process for return or replacement of AS348W5-7?
All AS348W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AS348W5-7, 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 AS348W5-7 part is unused and in its original packaging.
Return procedure for AS348W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AS348W5-7 Tags
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LM358DT
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