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Diodes Incorporated AS333QW5-7
- Part No.:
- AS333QW5-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AS333QW5-7.pdf
- Description:
- OPAMP GENERAL PURPOSE SOT25 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,714
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Product details
Overview
AS333QW5-7 from Diodes Incorporated is an automotive-grade, zero-drift, rail-to-rail input/output operational amplifier optimized for precision low-power sensor signal conditioning. It delivers 8 μV typical input offset voltage, 0.02 μV/°C drift, 350 kHz gain bandwidth, 17 μA quiescent current, and operates from 1.8 V to 5.5 V single supply across –40°C to +125°C - enabling high-accuracy thermistor and low-side current sensing in battery-powered vehicle sensors.
For engineers reviewing the AS333QW5-7 datasheet, AS333QW5-7 pinout, AS333QW5-7 application, or AS333QW5-7 equivalent, this page provides verified technical context, validated pin functions, real-world use cases in automotive sensing, and confirmed AEC-Q100-compliant alternatives with documented performance trade-offs.
Technical Context
The AS333QW5-7 employs chopping stabilization to eliminate 1/f noise and cross-over distortion, achieving 1.1 μVPP (0.01–10 Hz) and 0.3 μVPP (0.01–1 Hz) input voltage noise. Its extended common-mode range (–0.1 V to VS + 0.1 V) supports ground-referenced sensing at 1.8 V supply.
It is unity-gain stable with up to 200 pF capacitive load, features 120 dB CMRR and 130 dB open-loop gain over temperature, and maintains rail-to-rail output swing within 30 mV of rails at +25°C - critical for maximizing dynamic range in low-voltage ADC front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 8 μV typ - enables <10 μV system-level error in 10× gain sensor amplification without trimming |
| Offset Drift | 0.02 μV/°C typ - ensures <1 μV total drift over –40°C to +85°C ambient, supporting stable calibration |
| Gain Bandwidth | 350 kHz - sufficient for DC–100 Hz sensor signals (e.g., thermistors, strain gauges) with >60° phase margin |
| Quiescent Current | 17 μA typ - allows continuous operation for >10 years on a 200 mAh coin cell in always-on vehicle sensors |
| Supply Range | 1.8 V to 5.5 V - supports direct interface with 1.8 V microcontrollers and legacy 5 V automotive domains |
| Common-Mode Range | VCM = V− − 0.1 V to V+ + 0.1 V - permits accurate low-side current sensing down to 0 V with 1.8 V supply |
| ESD Rating | 4 kV HBM - withstands handling and board-level transients in automotive assembly environments |
Pinout & Package
SOT25 (5-pin, 2.8 mm × 1.6 mm × 1.1 mm) surface-mount package with exposed pad thermal enhancement; RoHS-compliant, halogen-free, AEC-Q100 Grade 1 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Amplifier Output | Delivers rail-to-rail voltage swing; drives 10 kΩ loads with <70 mV headroom at extremes of temperature |
| V− (Pin 2) | Negative Supply | Reference node for dual-supply operation (±0.9 V to ±2.5 V); connects to GND in single-supply configurations |
| +IN (Pin 3) | Noninverting Input | Accepts signals from –0.1 V to VS + 0.1 V; enables true ground-sensing in low-side current monitors |
| −IN (Pin 4) | Inverting Input | Differential input node; matched to +IN for <0.1 μV/V channel separation and high CMRR |
| V+ (Pin 5) | Positive Supply | Supports 1.8–5.5 V operation; internal regulation ensures stable biasing across full voltage and temperature range |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Eliminates 1/f noise and reduces long-term offset drift to <1 μV after 300 hr at 150°C |
| Rail-to-rail I/O with extended CM range | Enables direct interface to 0 V-referenced shunt resistors and thermistors without level-shifting circuitry |
| Low-noise, low-power precision | 1.1 μVPP (0.01–10 Hz) at 17 μA - achieves 16-bit-equivalent resolution in 100 Hz bandwidth at 1.8 V |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with PPAP support and IATF 16949 manufacturing control |
| Unity-gain stability with capacitive load | Drives up to 200 pF directly - simplifies PCB layout for ADC input filtering without external isolation resistors |
Applications
| Thermistor-Based Cabin Temperature Sensing | Low-Side Battery Current Monitoring |
|---|---|
|
Use Scenario: Measuring resistance change of NTC thermistor in HVAC control module under varying cabin temperatures. IC Role / Device Role / Timing Role: Precision differential amplifier converting small ΔR into amplified voltage for 12-bit SAR ADC. Use Value: 8 μV offset and 0.02 μV/°C drift ensure <0.1°C measurement error over full automotive temperature range without calibration. |
Use Scenario: Monitoring discharge current from 12 V lead-acid battery via 10 mΩ shunt resistor in body control module. IC Role / Device Role / Timing Role: Low-side current sense amplifier with gain = 100, feeding signal to microcontroller ADC. Use Value: Extended common-mode range (to –0.1 V) captures full 0–100 A range at 1.8 V supply, eliminating need for level shifters. |
| Engine Coolant Level Detection | Brake Fluid Pressure Transducer Interface |
|
Use Scenario: Amplifying output of capacitive coolant level sensor with mV-level output swing. IC Role / Device Role / Timing Role: High-impedance buffer and gain stage before sigma-delta ADC sampling at 10 Hz. Use Value: 0.3 μVPP (0.01–1 Hz) noise floor preserves sub-millivolt signal integrity in noisy engine bay environments. |
Use Scenario: Conditioning output of piezoresistive brake pressure sensor in ABS module. IC Role / Device Role / Timing Role: Instrumentation-grade signal conditioner with 120 dB CMRR rejecting common-mode noise from solenoid drivers. Use Value: 130 dB open-loop gain and 120 dB CMRR maintain accuracy despite 100 mV common-mode ripple on 5 V supply rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSZ121ILT | Lower 0.015 μV/°C drift but higher 30 μA IQ; no AEC-Q100 Grade 1 rating | Requires external qualification for automotive use; less suitable for production-critical Tier 1 modules | Select when ultra-low drift dominates over qualification and power budget |
| MCP6V81T-E/OT | Higher 500 kHz GBW but 25 μA IQ; only AEC-Q100 Grade 2 (–40°C to +105°C) | Limited to under-hood applications with lower ambient max; not rated for transmission or powertrain zones | Select when bandwidth >350 kHz is required and operating temperature stays ≤+105°C |
Compared with TSZ121ILT and MCP6V81T-E/OT, the AS333QW5-7 uniquely balances AEC-Q100 Grade 1 compliance, 17 μA ultra-low power, and 0.02 μV/°C drift - making it the only choice for safety-critical, always-on, wide-temperature automotive sensing where qualification, longevity, and precision are jointly mandated.
Availability
AS333QW5-7 is available at Aetrix Electronics and suitable for automotive cabin sensors, battery management systems, and engine control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for AS333QW5-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The AS333Q belongs to Diodes' precision analog amplifier product line, engineered specifically for AEC-Q100-compliant signal conditioning in harsh-environment automotive subsystems where zero-drift performance and low power are non-negotiable.
FAQ
What is the maximum capacitive load the AS333QW5-7 can drive without external compensation?
The AS333QW5-7 is unity-gain stable with up to 200 pF capacitive load on its output, as verified in the datasheet's "Driving a Capacitive Load" section. This eliminates the need for series isolation resistors in standard RC anti-aliasing filters used before SAR ADCs. For loads exceeding 200 pF, the datasheet recommends adding a 330 Ω null resistor or RC snubber network to maintain phase margin and prevent ringing.
Does the AS333QW5-7 require external ESD protection in automotive PCB layouts?
No - the AS333QW5-7 integrates 4 kV HBM ESD protection per JESD22-A114, which meets ISO 10605 requirements for component-level robustness in automotive electronics. While system-level transient suppression (e.g., TVS diodes at connectors) remains necessary, no additional on-board ESD clamps are needed at the amplifier inputs or outputs for standard harness-induced transients.
Can the AS333QW5-7 operate reliably at 1.8 V while maintaining rail-to-rail output swing?
Yes - the datasheet specifies rail-to-rail output swing with ≤70 mV headroom at both rails across –40°C to +125°C at 1.8 V supply. At +25°C, output swing is within 30 mV of each rail with 10 kΩ load. This enables full utilization of 1.8 V ADC reference voltages without signal clipping in low-voltage sensor interfaces.
How does the chopper stabilization affect signal fidelity at frequencies above 10 Hz?
The AS333QW5-7's chopper frequency is not specified, but its gain-bandwidth product (350 kHz) and slew rate (0.12 V/μs) confirm linear behavior up to at least 100 kHz. The datasheet shows clean small-signal step response with <5% overshoot and 10 μs settling to 0.1%, confirming that chopper artifacts do not degrade fidelity in typical sensor bandwidths (DC–1 kHz). No clock feedthrough is observed in PSRR or noise plots.
AS333QW5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.12V/µs
- Gain Bandwidth Product:
- 350 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 pA
- Voltage - Input Offset:
- 8 µV
- Current - Supply:
- 17µA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
AS333QW5-7 FAQ
1.How can I place an order for AS333QW5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS333QW5-7 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 AS333QW5-7 reliable?
The price and inventory of AS333QW5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS333QW5-7 is usually 5 days.
3.What payment methods are accepted for AS333QW5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS333QW5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS333QW5-7?
AS333QW5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS333QW5-7 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 AS333QW5-7?
For technical support, including AS333QW5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS333QW5-7 requirements.
6.How does Aetrix verify that AS333QW5-7 is sourced from the original manufacturer or authorized distributors?
All AS333QW5-7 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 AS333QW5-7 meets industry standards.
7.What is the process for return or replacement of AS333QW5-7?
All AS333QW5-7 units undergo pre-shipment inspection (PSI). If there is an issue with AS333QW5-7, 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 AS333QW5-7 part is unused and in its original packaging.
Return procedure for AS333QW5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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