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Diodes Incorporated AS2333S-13
- Part No.:
- AS2333S-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AS2333S-13.pdf
- Description:
- IC OPAMP ZER-DRIFT 1CIRC
- Quantity:
- Payment:
- Shipping:
Inventory:15,394
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Product details
Overview
AS2333S-13 from Diodes Incorporated is a dual, micropower, zero-drift CMOS operational amplifier in SO-8 package, delivering 8μV typical input offset voltage, 0.02μV/°C drift, 350kHz gain-bandwidth, rail-to-rail input/output swing, and 12μA per amplifier quiescent current. It operates from 1.8V to 5.5V single supply and is specified for -40°C to +125°C, targeting precision sensor signal conditioning in battery-powered medical and test equipment.
For engineers reviewing the AS2333S-13 datasheet, AS2333S-13 pinout, AS2333S-13 application, or AS2333S-13 equivalent, this page provides verified technical context, validated pin functions, real-world use cases in low-side current sensing and thermistor measurement, and confirmed alternative options with documented functional trade-offs.
Technical Context
The AS2333S-13 employs chopping stabilization to eliminate 1/f noise and achieve near-zero input offset drift over temperature and time. Its architecture supports rail-to-rail input common-mode range extending 100mV beyond supply rails and output swing within 50mV of rails at 25°C.
It features unity-gain stability, 106dB CMRR, 120dB PSRR, and 130dB open-loop gain across -40°C to +125°C. The device drives capacitive loads up to 200pF directly and supports low-voltage operation down to 1.8V with 100μs turn-on time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 8μV typical - enables high-accuracy DC amplification without calibration in microvolt-level sensor interfaces |
| Offset Drift | 0.02μV/°C typical - ensures stable baseline over industrial temperature range without thermal recalibration |
| Supply Voltage Range | 1.8V to 5.5V - supports direct integration into Li-ion (3.0–3.7V) and coin-cell (1.5–3.0V) powered systems |
| Quiescent Current | 12μA per amplifier - allows continuous operation for years on a single CR2032 battery in always-on monitoring nodes |
| Gain-Bandwidth Product | 350kHz - sufficient for DC–100Hz biomedical signals and slow industrial process variables |
| Slew Rate | 0.12V/μs - limits large-signal transient response but avoids aliasing in low-frequency precision applications |
| Input Noise (0.1–10Hz) | 1.1μVPP - critical for high-gain amplification of thermocouples, RTDs, and strain gauges |
Pinout & Package
AS2333S-13 is housed in an 8-pin SO-8 package (JEDEC MS-012AA), with exposed pad not electrically connected. Thermal resistance is 139°C/W (junction-to-ambient), and moisture sensitivity level is 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - rail-to-rail swing within 50mV of V+ or V−; requires local 0.1μF decoupling |
| 2 | −INA | Inverting input, Channel A - high-impedance node (±70pA bias current); accepts common-mode voltage down to V− − 0.1V |
| 3 | +INA | Noninverting input, Channel A - same common-mode range as −INA; used for differential or single-ended configurations |
| 4 | V− | Negative supply - tied to GND in single-supply mode; requires 0.1μF capacitor to ground if split-supply used |
| 5 | +INB | Noninverting input, Channel B - independent of Channel A; enables dual-sensor readout or signal buffering |
| 6 | −INB | Inverting input, Channel B - matched performance to −INA; supports independent feedback networks per channel |
| 7 | OUTB | Amplifier B output - identical electrical behavior to OUTA; no crosstalk (0.1μV/V channel separation) |
| 8 | V+ | Positive supply - accepts 1.8–5.5V; must be decoupled with 0.1μF capacitor placed adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Eliminates 1/f noise and crossover distortion, enabling clean DC-coupled amplification below 1Hz |
| Rail-to-rail input range | Extends 100mV beyond supply rails - permits accurate ground-referenced sensing in low-voltage systems |
| Zero-drift performance | 0.02μV/°C drift ensures <1μV total offset shift across full −40°C to +125°C operating range |
| Low quiescent power | 12μA per amplifier allows dual-channel precision amplification while consuming <60μW at 5V |
| High CMRR & PSRR | 120dB CMRR and >100dB PSRR suppress common-mode interference and supply ripple in noisy environments |
Applications
| Thermistor Measurement | Low-Side Current Monitor |
|---|---|
|
Use Scenario: Precision temperature sensing using NTC thermistors in portable medical devices. IC Role / Device Role / Timing Role: Dual-opamp configured as instrumentation amplifier front-end, rejecting PCB thermal gradients and supply noise. Use Value: 8μV offset and 0.02μV/°C drift enable ±0.1°C accuracy over full temperature range without software compensation. |
Use Scenario: Real-time load current monitoring in battery management systems for wearables. IC Role / Device Role / Timing Role: Single opamp in difference amplifier configuration measuring mV-level drop across 10mΩ shunt resistor. Use Value: Rail-to-rail input allows sensing down to 100mV above ground; 1.1μVPP noise ensures resolution better than 1mA at 1A full scale. |
| Sensor Signal Conditioning | Medical Instrumentation |
|
Use Scenario: Amplifying low-amplitude signals from piezoresistive pressure sensors in handheld diagnostic tools. IC Role / Device Role / Timing Role: First-stage gain block with 1000× noninverting configuration, driving 16-bit SAR ADC reference buffer. Use Value: 130dB open-loop gain and 106dB CMRR preserve signal integrity despite PCB layout asymmetry and EMI exposure. |
Use Scenario: Front-end amplification for ECG electrode signals in FDA-cleared portable monitors. IC Role / Device Role / Timing Role: Dual-channel, DC-coupled amplifier with matched channels for lead-I/lead-II differential acquisition. Use Value: Dual-channel matching (<0.1μV/V inter-channel offset) minimizes common-mode rejection degradation in multi-lead topologies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar zero-drift operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8628ARZ | Higher quiescent current (45μA vs. 12μA); wider supply range (2.7–5.5V); same 1μV offset spec but higher 0.1μV/°C drift | Less suitable for multi-year battery life; better for mixed-signal systems requiring tighter supply margin | Select when higher drive capability (20mA vs. 5mA source) or wider supply tolerance outweighs power penalty |
| LTC2050CS8#TRPBF | Lower noise (0.7μVPP vs. 1.1μVPP); higher bandwidth (1.5MHz vs. 350kHz); 25μA IQ; requires ≥2.7V supply | Better for dynamic sensor signals above 100Hz; incompatible with 1.8V-only systems | Select when system bandwidth exceeds 100Hz and supply is ≥2.7V; avoid for sub-1.8V or ultra-low-power designs |
Compared with AD8628ARZ and LTC2050CS8#TRPBF, AS2333S-13 uniquely balances micropower operation (12μA), 1.8V compatibility, and sub-10μV offset in a cost-effective SO-8 package-making it optimal for long-life, low-voltage, high-DC-precision applications where bandwidth is secondary.
Availability
AS2333S-13 is available at Aetrix Electronics and suitable for battery-powered instruments, handheld test equipment, and medical instrumentation requiring stable component supply across extended product lifecycles.
Supply support for AS2333S-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 semiconductor company specializing in discrete, analog, and mixed-signal ICs, with design centers in Asia, Europe, and the U.S., serving industrial, computing, consumer, and automotive markets.
The AS2333 belongs to Diodes' precision analog amplifier product line, engineered specifically for ultra-low-offset, low-power, high-temperature-stability signal conditioning in resource-constrained embedded systems.
FAQ
What is the maximum capacitive load the AS2333S-13 can drive without external compensation?
The AS2333S-13 can directly drive up to 200pF in unity-gain configuration without oscillation or excessive ringing, as verified in the datasheet's small-signal response tests. For loads exceeding 200pF, a series null resistor (e.g., 330Ω) between amplifier output and capacitive load is required to restore phase margin and prevent instability.
Does the AS2333S-13 support true single-supply operation with input voltages at ground potential?
Yes - its rail-to-rail input stage extends 100mV below V− (which is GND in single-supply mode), allowing valid operation with inputs at 0V. This enables direct interfacing with ground-referenced sensors like shunt resistors or thermistors without level-shifting circuitry.
How does the chopper stabilization affect signal fidelity at frequencies near the chopping clock?
The AS2333S-13 uses internal chopping at ~100kHz, and its datasheet confirms no observable artifacts in small-signal response up to 100kHz. Output spectral density shows no spurs above noise floor, and typical application circuits (e.g., thermistor measurement) operate well below 10Hz - far from clock harmonics.
Is the exposed thermal pad on the SO-8 package of AS2333S-13 electrically connected?
No - the exposed pad on the AS2333S-13 SO-8 package is not electrically connected to any internal node. It serves only for thermal conduction and mechanical stability; datasheet Pin Assignments and Mechanical Data confirm it is left floating and may be tied to GND solely for thermal enhancement.
AS2333S-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:
- 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:
- 12µA
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
AS2333S-13 FAQ
1.How can I place an order for AS2333S-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS2333S-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 AS2333S-13 reliable?
The price and inventory of AS2333S-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS2333S-13 is usually 5 days.
3.What payment methods are accepted for AS2333S-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS2333S-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS2333S-13?
AS2333S-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS2333S-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 AS2333S-13?
For technical support, including AS2333S-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS2333S-13 requirements.
6.How does Aetrix verify that AS2333S-13 is sourced from the original manufacturer or authorized distributors?
All AS2333S-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 AS2333S-13 meets industry standards.
7.What is the process for return or replacement of AS2333S-13?
All AS2333S-13 units undergo pre-shipment inspection (PSI). If there is an issue with AS2333S-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 AS2333S-13 part is unused and in its original packaging.
Return procedure for AS2333S-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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