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Diodes Incorporated AS2333QS-13
- Part No.:
- AS2333QS-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AS2333QS-13.pdf
- Description:
- OPAMPGENERALPURPOSESO-8T&R2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:2,193
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Product details
Overview
AS2333QS-13 from Diodes Incorporated is a dual, micropower, zero-drift CMOS operational amplifier using chopping stabilization to achieve 8 μV typical input offset voltage, 0.02 μV/°C drift, and 1.1 μVPP (0.01–10 Hz) noise. It operates from 1.8 V to 5.5 V single or split supply, delivers rail-to-rail I/O swing within 50 mV of rails, and is AEC-Q100 Grade 1 qualified for automotive use from −40 °C to +125 °C.
For engineers reviewing the AS2333QS-13 datasheet, AS2333QS-13 pinout, AS2333QS-13 application, or AS2333QS-13 equivalent, key selection criteria include ultra-low offset stability over temperature, sub-12 μA per amplifier quiescent current, SO-8 package compatibility, and suitability for precision low-voltage sensor signal conditioning in safety-critical automotive subsystems.
Technical Context
The AS2333QS-13 implements a chopper-stabilized architecture that actively corrects input offset voltage and its drift in real time, eliminating 1/f noise and crossover distortion common in rail-to-rail input amplifiers. Its input stage supports common-mode voltage range extending 100 mV beyond both supply rails, enabling accurate ground-referenced sensing.
With 350 kHz gain-bandwidth product, 0.12 V/μs slew rate, and unity-gain stability into 200 pF capacitive load, it balances precision and bandwidth for DC-coupled, low-frequency measurement circuits-especially where long-term calibration stability and battery life are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 8 μV typical - enables <1 mV error in 12-bit 2.5 V full-scale systems without trimming |
| Offset Drift | 0.02 μV/°C typical - ensures <0.5 μV total drift across −40 °C to +125 °C operating range |
| 0.01–10 Hz Noise | 1.1 μVPP - supports high-resolution thermistor or bridge sensor measurements at sub-Hz frequencies |
| Quiescent Current | 12 μA per amplifier - allows continuous operation >10 years on a single CR2032 coin cell in always-on monitoring |
| Supply Range | 1.8 V to 5.5 V - compatible with Li-ion, 2xAA, or 3.3 V/5 V system rails without level-shifting |
| Rail-to-Rail I/O | Inputs extend 100 mV beyond rails; outputs swing within 50 mV - maximizes dynamic range in low-voltage single-supply designs |
| Bandwidth | 350 kHz - sufficient for closed-loop control of slow actuators (e.g., pumps, valves) and sensor digitization up to ~10 ksps |
Pinout & Package
AS2333QS-13 is housed in an industry-standard SO-8 (Small Outline-8) package with 1.27 mm pitch, RoHS-compliant matte tin plating, and moisture sensitivity level 1. Recommended PCB pad layout follows JEDEC MS-012AC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - drives external load or ADC input; requires local 0.1 μF decoupling to V− |
| 2 | −INA | Inverting input, Channel A - forms feedback node in inverting configurations; high-impedance (>1 TΩ) |
| 3 | +INA | Non-inverting input, Channel A - accepts sensor signals down to 100 mV below ground in single-supply mode |
| 4 | V− | Negative supply - tied to GND in single-supply; requires 0.1 μF decoupling to GND if used as split rail |
| 5 | +INB | Non-inverting input, Channel B - independent channel for dual-sensor or differential pair applications |
| 6 | −INB | Inverting input, Channel B - isolated from Channel A; no crosstalk (<0.1 μV/V) between channels |
| 7 | OUTB | Amplifier B output - electrically isolated; supports independent gain/feedback networks per channel |
| 8 | V+ | Positive supply - accepts 1.8–5.5 V; requires 0.1 μF ceramic capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Eliminates 1/f noise and achieves near-zero long-term offset drift - critical for unattended automotive sensors |
| Rail-to-rail input beyond rails | ±100 mV input common-mode range - enables direct interface to shunt resistors or bridge sensors referenced to ground or VDD |
| Low quiescent current | 12 μA per amplifier at +25°C - reduces thermal self-heating and extends battery life in portable diagnostic tools |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with PPAP support - meets functional safety requirements for airbag and occupant detection ECUs |
| ESD robustness | 4 kV HBM - protects against handling damage during SMT assembly and field service in vehicle environments |
Applications
| Thermistor-Based Cabin Temperature Sensing | Low-Side Current Monitoring in Airbag Deployment Circuits |
|---|---|
|
Use Scenario: Measuring resistance change of NTC thermistors in HVAC control modules under varying cabin temperatures. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end, converting small ΔR into stable voltage for 12-bit ADC sampling. Use Value: 8 μV offset and 0.02 μV/°C drift ensure ±0.1°C accuracy over full automotive temperature range without recalibration. |
Use Scenario: Detecting pre-deployment current signatures in pyrotechnic squib circuits prior to airbag firing. IC Role / Device Role / Timing Role: High-common-mode-rejection current sense amplifier in low-side configuration with 50 mV output swing headroom. Use Value: Rail-to-rail output and 1.1 μVPP noise enable reliable detection of <10 mA fault currents amid EMI-rich vehicle electrical noise. |
| Vehicle Occupant Detection via Capacitive Sensing | Pump Motor Current Feedback in Electric Power Steering |
|
Use Scenario: Amplifying microvolt-level capacitance changes from seat-mounted electrodes detecting occupant presence/position. IC Role / Device Role / Timing Role: Ultra-low-noise, DC-coupled signal conditioner feeding delta-sigma ADC in occupant classification ECU. Use Value: Chopper architecture eliminates 1/f noise, allowing stable baseline tracking over hours-essential for distinguishing static vs. dynamic occupancy states. |
Use Scenario: Closed-loop motor phase current sensing in EPS control units to regulate torque and prevent overheating. IC Role / Device Role / Timing Role: Dual-channel current monitor providing simultaneous high-side and low-side feedback for three-phase FOC algorithms. Use Value: Dual independent amplifiers in one SO-8 reduce board space by 40% vs. discrete solutions while maintaining channel isolation <0.1 μV/V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zero-drift op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARZ | Higher quiescent current (45 μA), wider supply range (2.7–5.5 V), no AEC-Q100 qualification | Not suitable for Grade 1 automotive deployment; better for industrial bench instruments | Select when higher bandwidth (2.5 MHz) is needed and automotive qualification is unnecessary |
| MCP6V81-E/SN | Lower offset (2 μV), but higher noise (2.5 μVPP) and no extended common-mode range (only rail-to-rail input) | Limited to ground-referenced sensors; cannot sense below −100 mV in single-supply mode | Select when absolute lowest offset is prioritized over low-frequency noise and input range flexibility |
Compared with AD8628ARZ and MCP6V81-E/SN, AS2333QS-13 uniquely combines AEC-Q100 Grade 1 qualification, 12 μA quiescent current, and ±100 mV input common-mode extension-making it the only choice for space-constrained, battery-backed automotive safety sensors requiring decade-long calibration stability.
Availability
AS2333QS-13 is available at Aetrix Electronics and suitable for automotive airbag control units, cabin temperature monitoring systems, and electric power steering current feedback loops requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AS2333QS-13 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 with ISO/TS 16949 and ISO 14001 certifications.
The AS2333QS-13 belongs to Diodes' precision analog amplifier product line, engineered specifically for automotive-grade signal conditioning where long-term offset stability, ultra-low power, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum capacitive load the AS2333QS-13 can drive without external compensation?
The AS2333QS-13 is unity-gain stable and can directly drive up to 200 pF without oscillation or ringing. For loads exceeding 200 pF-such as ADC input capacitors or long PCB traces-a series null resistor (e.g., 330 Ω) between amplifier output and load restores phase margin and prevents overshoot, as verified in Diodes' application note DS44879 Figure 4–5.
Does the AS2333QS-13 support true single-supply operation with inputs at ground potential?
Yes. Its input common-mode range extends 100 mV below V−, so with V− = 0 V (ground), inputs can be as low as −100 mV-enabling direct connection to grounded shunt resistors or bridge midpoints without level-shifting circuitry. This is confirmed in Electrical Characteristics Table (VCM = (V−) − 0.1 V).
How does the chopper clock frequency affect signal integrity in AS2333QS-13 applications?
The internal chopper frequency is not user-accessible and is optimized to minimize residual ripple. Diodes specifies output voltage noise spectral density down to 0.1 Hz with no observable spurs, and typical application circuits (e.g., thermistor measurement) show clean step responses without aliasing-confirming that chopper artifacts are suppressed below the noise floor for DC and low-frequency (<10 Hz) signals.
Is the AS2333QS-13 pin-compatible with other Diodes zero-drift op-amps like AS333Q?
No. AS2333QS-13 uses an SO-8 package with dual-amplifier pinout (OUTA/−INA/+INA/V−/+INB/−INB/OUTB/V+), whereas AS333Q is a single-channel device in SOT-23-5. Pin mapping, channel count, and supply pin locations differ fundamentally-PCB redesign is required for substitution, and no drop-in replacement exists within Diodes' portfolio.
AS2333QS-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- 0.12V/µs
- Gain Bandwidth Product:
- 350 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 pA
- Voltage - Input Offset:
- 8 µV
- Current - Supply:
- 12mA (x2 Channels)
- 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:
- 8-SO
AS2333QS-13 FAQ
1.How can I place an order for AS2333QS-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS2333QS-13 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 AS2333QS-13 reliable?
The price and inventory of AS2333QS-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS2333QS-13 is usually 5 days.
3.What payment methods are accepted for AS2333QS-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS2333QS-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS2333QS-13?
AS2333QS-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS2333QS-13 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 AS2333QS-13?
For technical support, including AS2333QS-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS2333QS-13 requirements.
6.How does Aetrix verify that AS2333QS-13 is sourced from the original manufacturer or authorized distributors?
All AS2333QS-13 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 AS2333QS-13 meets industry standards.
7.What is the process for return or replacement of AS2333QS-13?
All AS2333QS-13 units undergo pre-shipment inspection (PSI). If there is an issue with AS2333QS-13, 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 AS2333QS-13 part is unused and in its original packaging.
Return procedure for AS2333QS-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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