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Diodes Incorporated AS333SE-7
- Part No.:
- AS333SE-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
AS333SE-7.pdf
- Description:
- OPAMP GENERAL PURPOSE SOT353 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,863
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Product details
Overview
AS333SE-7 from Diodes Incorporated is a 1.8V–5.5V rail-to-rail input/output zero-drift operational amplifier featuring 8 μV typical input offset voltage, 0.02 μV/°C drift, and 17 μA quiescent current. It employs chopping stabilization to eliminate 1/f noise and cross-over distortion, supports 100 mV beyond-rail common-mode input, and delivers 350 kHz gain bandwidth - ideal for precision low-power sensor signal conditioning in battery-powered medical and industrial instrumentation.
For engineers reviewing the AS333SE-7 datasheet, AS333SE-7 pinout, AS333SE-7 application, or AS333SE-7 equivalent, key selection criteria include ultra-low offset drift over temperature, sub-20 μA supply current at 1.8V operation, RRIO capability with extended common-mode range, and verified stability driving ≥200 pF capacitive loads without external compensation.
Technical Context
The AS333SE-7 implements a chopper-stabilized architecture with auto-zeroing feedback to suppress 1/f noise and minimize long-term offset drift. Its input stage extends 100 mV beyond both supply rails (e.g., VCM = –0.1 V to VCC + 0.1 V at 1.8V–5.5V), enabling accurate low-side current sensing and thermistor measurements near ground or VDD.
It achieves unity-gain stability with up to 200 pF capacitive load, exhibits 120 dB CMRR and >106 dB open-loop gain across –40°C to +125°C, and maintains 0.12 V/μs slew rate while consuming only 17 μA - balancing precision, speed, and micropower operation for high-gain DC-coupled applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8V to 5.5V single supply - enables direct integration into Li-ion, coin-cell, and energy-harvesting systems. |
| Input Offset Voltage | 8 μV (typ) - reduces DC error in 100× gain sensor amplifiers to <0.8 mV output error. |
| Offset Drift | 0.02 μV/°C (typ) - ensures <1 μV total drift over –40°C to +125°C ambient range. |
| Quiescent Current | 17 μA (typ) - supports >1-year battery life in 10 μA-average-current handheld instruments. |
| Gain Bandwidth | 350 kHz - sufficient for 50 Hz–1 kHz sensor signals with ≥60 dB closed-loop gain stability. |
| Input Noise (0.01–10 Hz) | 1.1 μVPP - preserves resolution in low-frequency bridge and thermistor measurements. |
| Common-Mode Range | V– – 0.1 V to V+ + 0.1 V - allows direct sensing of signals at system ground or rail in single-supply configurations. |
Pinout & Package
SOT353 (5-pin SC-70) package: ultra-compact 2.15 mm × 2.10 mm footprint with 0.65 mm pitch, optimized for space-constrained portable and wearable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN) | Inverting Input | Differential node for feedback networks; clamped to rails ±0.3 V, requires current limiting if driven beyond supply. |
| 2 (V–) | Negative Power Supply | Ground reference for single-supply operation; must be decoupled with ≤100 nF ceramic capacitor. |
| 3 (+IN) | Noninverting Input | High-impedance sensor interface node; supports common-mode inputs down to –0.1 V below ground. |
| 4 (OUT) | Amplifier Output | Capable of sourcing 5 mA / sinking 25 mA; stable with ≥200 pF load in unity-gain configuration. |
| 5 (V+) | Positive Power Supply | 1.8V–5.5V input; PSRR >100 dB at DC ensures immunity to supply ripple in noisy embedded systems. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Eliminates 1/f noise and cross-over distortion, enabling clean DC amplification of µV-level sensor outputs. |
| Rail-to-rail I/O with extended common-mode | Supports input signals 100 mV beyond supply rails - critical for low-side current sensing and ground-referenced bridges. |
| Unity-gain stability with 200 pF load | Enables direct connection to ADC input capacitors or long PCB traces without external phase compensation. |
| –40°C to +125°C operation | Validated performance across full automotive and industrial temperature range without derating. |
| 4 kV HBM ESD rating | Robustness against handling and system-level transients in unshielded portable medical and environmental sensors. |
Applications
| Battery-Powered Medical Sensors | Low-Voltage Current Sensing |
|---|---|
|
Use Scenario: Pulse oximeter front-end amplifying photodiode current in 1.8V coin-cell powered wearable. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with sub-μV offset to resolve <1% SpO₂ saturation changes. Use Value: 8 μV offset and 0.02 μV/°C drift prevent calibration drift across body-temperature variations and multi-day wear. |
Use Scenario: High-side current monitor in 3.3V IoT node measuring sleep-mode leakage currents down to 10 μA. IC Role / Device Role / Timing Role: Differential amplifier rejecting common-mode bus voltage while resolving mV-level shunt drops. Use Value: 120 dB CMRR and rail-to-rail input enable accurate measurement with 100 mV common-mode headroom at 1.8V supply. |
| CO Detector Signal Chain | Thermistor-Based Temperature Monitoring |
|
Use Scenario: Electrochemical CO sensor amplifier in battery-operated safety alarm with 10-year shelf life. IC Role / Device Role / Timing Role: Low-noise, low-drift buffer for nA-level sensor output before 16-bit sigma-delta ADC. Use Value: 1.1 μVPP (0.01–10 Hz) noise floor resolves sub-ppm CO concentration changes without averaging. |
Use Scenario: NTC thermistor interface in HVAC controller operating from –40°C to +125°C ambient. IC Role / Device Role / Timing Role: Precision voltage follower converting resistance change to linearized voltage for microcontroller ADC. Use Value: Guaranteed 0.2 μV/°C max drift over full temperature range eliminates software-based offset compensation. |
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 |
|---|---|---|---|
| MCP6V81-E/SN | Higher 30 μA IQ, 1.2 μVPP noise (0.1–10 Hz), same SOT23-5 package | Less suitable for <20 μA average-power systems; better for higher-speed 1 MHz GBW needs | Select when higher bandwidth outweighs quiescent current penalty and SOT23-5 board reuse is required. |
| LTC2050CS5#TRMPBF | 2.5 μV max VOS, 0.015 μV/°C drift, but 55 μA IQ and 5V min supply | Not viable for 1.8V operation; superior offset spec but incompatible with ultra-low-voltage designs | Choose only for applications requiring guaranteed sub-3 μV initial offset and operating ≥5V. |
Compared with MCP6V81-E/SN and LTC2050CS5#TRMPBF, the AS333SE-7 uniquely combines 1.8V operation, <20 μA IQ, and <10 μV offset drift in a 5-pin SC-70 - making it the sole option for space- and power-constrained precision sensing below 2V.
Availability
AS333SE-7 is available at Aetrix Electronics and suitable for battery-powered medical devices, low-voltage current sensing modules, CO detector signal chains, and thermistor-based temperature monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AS333SE-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, low-power, and automotive-qualified components with ISO/TS 16949-certified manufacturing.
The AS333SE-7 belongs to Diodes' precision analog amplifier product line, engineered specifically for ultra-low-power, high-accuracy signal conditioning in portable and harsh-environment applications where offset stability and micropower operation are critical.
FAQ
What is the maximum capacitive load the AS333SE-7 can drive without oscillation?
The AS333SE-7 is unity-gain stable with up to 200 pF capacitive load on its output, as confirmed by characterization data in the datasheet (DS45351 Rev. 2–2, p.7). This eliminates need for external isolation resistors in most ADC driver and filter applications. For loads >200 pF, a series resistor (e.g., 330 Ω) or RC snubber is recommended per Figure 3–7 in the application section.
Does the AS333SE-7 support true rail-to-rail input at 1.8V supply?
Yes - the AS333SE-7 guarantees rail-to-rail input operation with 100 mV beyond both supply rails (V– – 0.1 V to V+ + 0.1 V) across its full 1.8V–5.5V supply range, including at 1.8V. This is explicitly specified in the Recommended Operating Conditions table (p.3) and validated over temperature.
How does the chopper stabilization affect signal fidelity at frequencies above 10 Hz?
The chopper clock frequency is not published, but typical performance plots (p.5–6) show flat voltage noise spectral density from 10 Hz to 1 kHz and stable step response with <10% overshoot. The device is intended for DC–350 kHz applications; high-frequency signal integrity is preserved by eliminating 1/f noise without introducing switching artifacts in the passband.
Is the AS333SE-7 qualified for automotive applications per AEC-Q100?
No - the AS333SE-7 is not AEC-Q100 qualified. The datasheet states that automotive-grade versions require specific change control and PPAP capability, and directs users to contact Diodes or local representatives for such variants. Standard AS333SE-7 is rated for industrial temperature (–40°C to +125°C) but lacks automotive qualification documentation.
AS333SE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-353
AS333SE-7 FAQ
1.How can I place an order for AS333SE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS333SE-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 AS333SE-7 reliable?
The price and inventory of AS333SE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS333SE-7 is usually 5 days.
3.What payment methods are accepted for AS333SE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS333SE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS333SE-7?
AS333SE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS333SE-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 AS333SE-7?
For technical support, including AS333SE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS333SE-7 requirements.
6.How does Aetrix verify that AS333SE-7 is sourced from the original manufacturer or authorized distributors?
All AS333SE-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 AS333SE-7 meets industry standards.
7.What is the process for return or replacement of AS333SE-7?
All AS333SE-7 units undergo pre-shipment inspection (PSI). If there is an issue with AS333SE-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 AS333SE-7 part is unused and in its original packaging.
Return procedure for AS333SE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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