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Diodes Incorporated AS393AMTR-E1
- Part No.:
- AS393AMTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AS393AMTR-E1.pdf
- Description:
- IC COMPARATOR 2 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,908
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Product details
Overview
AS393AMTR-E1 from Diodes Incorporated is a low-power, precision dual voltage comparator with 1.0 mV typical input offset voltage, open-collector outputs, and operation from single supplies (2 V to 36 V) or dual supplies (±1.0 V to ±18 V). It delivers 0.6 mA supply current, 25 nA input bias current, and 200 mV output saturation voltage at 4 mA, enabling accurate threshold detection in battery-powered and industrial power management systems.
For engineers reviewing the AS393AMTR-E1 datasheet, AS393AMTR-E1 pinout, AS393AMTR-E1 application, or AS393AMTR-E1 equivalent, key selection criteria include its guaranteed ≤3.0 mV max input offset voltage (tighter than AS393), SO-8 lead-free RoHS-compliant package, ground-sensing input common-mode range, and compatibility with legacy LM393/AS393 footprints in power supply monitoring and DC-DC control loops.
Technical Context
The AS393AMTR-E1 integrates two independent high-gain comparators with PNP-input stages enabling input common-mode voltage down to ground and up to VCC−1.5 V. Its differential input voltage range equals the full supply rail (±40 V absolute max), supporting robust overvoltage tolerance without clamping diodes.
Each comparator features open-collector output capable of sinking 16 mA minimum, with 200 mV saturation voltage at 4 mA load. The device operates across −40°C to +85°C with supply current stable over 2–36 V, making it suitable for unregulated input rails in switching power supplies and battery chargers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 1.0 mV typical, ≤3.0 mV max - enables precise threshold detection without calibration in 12-bit-equivalent analog sensing |
| Supply Voltage Range | Single: 2 V to 36 V; Dual: ±1.0 V to ±18 V - supports direct connection to 24 V industrial rails or Li-ion battery stacks |
| Supply Current | 0.6 mA typical at 5 V - allows continuous operation in always-on battery monitors with sub-µA quiescent budget |
| Input Bias Current | 25 nA typical - minimizes voltage error across high-impedance divider networks (e.g., 1 MΩ dividers add <25 µV error) |
| Output Saturation Voltage | 200 mV at 4 mA sink - ensures reliable logic-level interfacing with 3.3 V or 5 V CMOS inputs under load |
| Input Common-Mode Range | 0 V to VCC−1.5 V - permits direct ground-referenced sensing (e.g., current shunt monitoring) without level shifting |
| Response Time | 200 ns for 5 mV overdrive - sufficient for PWM frequency detection up to 2 MHz in synchronous buck controllers |
Pinout & Package
AS393AMTR-E1 is housed in a standard SO-8 (Small Outline Integrated Circuit) package with exposed pad not present, JEDEC MS-012AC compliant, RoHS-compliant matte tin-plated leads, and moisture sensitivity level 3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output 1 | Open-collector output for comparator 1; requires external pull-up to define logic HIGH level |
| 2 | Inverting Input 1 | Negative input terminal for comparator 1; accepts signals from 0 V to VCC−1.5 V |
| 3 | Non-inverting Input 1 | Positive input terminal for comparator 1; same common-mode range as Pin 2 |
| 4 | GND | Analog ground reference; must be low-impedance return path for input and output currents |
| 5 | Non-inverting Input 2 | Positive input terminal for comparator 2; electrically isolated from comparator 1 |
| 6 | Inverting Input 2 | Negative input terminal for comparator 2; supports identical voltage ranges as Pin 2 |
| 7 | Output 2 | Open-collector output for comparator 2; independently configurable with separate pull-up |
| 8 | VCC | Positive supply rail; powers both comparators; no reverse polarity protection |
Key Features
| Feature | Design Value |
|---|---|
| Low input offset voltage (≤3.0 mV) | Enables accurate zero-crossing or overvoltage detection in 12-bit ADC-equivalent resolution systems without trimming |
| Ground-sensing input stage | Allows direct interface to current-sense resistors tied to system ground, eliminating need for costly high-side sensing circuitry |
| Wide single-supply operation (2–36 V) | Permits use across 3.3 V microcontrollers, 12 V automotive subsystems, and 24 V industrial PLC I/O modules without LDO pre-regulation |
| Open-collector outputs with 16 mA sink capability | Supports wired-OR logic, level translation to multiple logic families (TTL, CMOS, LVCMOS), and direct driving of LEDs or small relays |
| Lead-free, RoHS-compliant SO-8 package | Meets global environmental compliance requirements and qualifies for reflow soldering per IPC-J-STD-020 Level 3 profile |
Applications
| Battery Charger Monitoring | Switching Power Supply Feedback |
|---|---|
|
Use Scenario: Detecting end-of-charge voltage thresholds and thermal foldback in multi-cell Li-ion chargers. IC Role / Device Role / Timing Role: Dual comparator implements precise voltage window detection and temperature-based disable logic. Use Value: 1.0 mV offset ensures ±5 mV accuracy on 4.2 V termination threshold, reducing risk of cell overvoltage stress. |
Use Scenario: Providing overvoltage protection (OVP) and undervoltage lockout (UVLO) in isolated flyback converters. IC Role / Device Role / Timing Role: One comparator monitors reflected auxiliary winding voltage; second enforces startup UVLO. Use Value: 200 mV output saturation guarantees clean TTL-compatible signal to PWM controller shutdown pin under 4 mA load. |
| PC Motherboard Power Sequencing | DC-DC Module Status Indication |
|
Use Scenario: Validating correct ramp-up sequence of +12 V, +5 V, and +3.3 V rails during system boot. IC Role / Device Role / Timing Role: Each comparator verifies individual rail against precision reference; outputs drive OR-gated POWER_GOOD. Use Value: Input common-mode range including ground allows direct connection to rail sense points without level-shifting resistors. |
Use Scenario: Generating fault indicators (e.g., overtemperature, overcurrent) in compact 12 V input DC-DC modules. IC Role / Device Role / Timing Role: Comparators interface with thermistor and current-sense amplifier outputs to assert FAULT signals. Use Value: 25 nA input bias current prevents loading of high-impedance sensor networks, preserving measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM393DR | Higher 2.0 mV typical offset (7.0 mV max); 1.2 mA supply current; same SO-8 footprint | Lacks guaranteed ≤3.0 mV max offset; less suitable for <10 mV threshold accuracy requirements | Select when cost is primary constraint and 7 mV offset is acceptable in non-critical detection |
| AS393MTR-E1 | Same architecture but 5.0 mV max offset (vs. 3.0 mV for AS393A); otherwise identical specs and pinout | Valid drop-in replacement where tighter offset is not required; NRND status indicates limited long-term availability | Choose for legacy designs already qualified with AS393; avoid for new designs requiring guaranteed low-offset performance |
Compared with LM393DR and AS393MTR-E1, AS393AMTR-E1 provides the tightest guaranteed offset (≤3.0 mV) and lowest supply current (0.6 mA), making it optimal for precision, low-power applications where threshold repeatability and battery life are critical.
Availability
AS393AMTR-E1 is available at Aetrix Electronics and suitable for battery chargers, switching power supplies, and PC motherboard power sequencing requiring stable component supply and long-term industrial availability.
Supply support for AS393AMTR-E1 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 industrial, computing, and consumer markets.
The AS393/393A series belongs to Diodes' precision analog comparator product line, designed specifically for high-accuracy voltage monitoring in power management systems where low offset, wide supply range, and ground-sensing capability are essential.
FAQ
What is the maximum allowable differential input voltage for AS393AMTR-E1?
The absolute maximum differential input voltage is ±40 V, as specified in the Absolute Maximum Ratings table. This rating is independent of supply voltage and allows safe operation even when inputs exceed VCC or go below GND by up to 40 V, provided common-mode limits are observed.
Can AS393AMTR-E1 operate with a 3.3 V single supply?
Yes - the device supports single-supply operation from 2 V to 36 V. At 3.3 V, it maintains full functionality: input common-mode range spans 0 V to 1.8 V, output saturation remains ≤200 mV at 4 mA, and supply current is ~0.45 mA, enabling direct interface with 3.3 V microcontrollers.
Is AS393AMTR-E1 pin-compatible with LM393?
Yes - AS393AMTR-E1 uses the industry-standard SO-8 pinout matching LM393, TL393, and other 393-family comparators. Pin 1 (OUT1), Pin 2 (IN1−), Pin 3 (IN1+), Pin 4 (GND), Pin 5 (IN2+), Pin 6 (IN2−), Pin 7 (OUT2), and Pin 8 (VCC) are identical, enabling direct replacement without PCB changes.
Does AS393AMTR-E1 require external pull-up resistors on its outputs?
Yes - both outputs are open-collector and require external pull-up resistors to a valid logic HIGH voltage (e.g., 3.3 V or 5 V). Typical values range from 2.2 kΩ to 10 kΩ depending on rise time and bus capacitance; lower values improve speed but increase power consumption during LOW state.
AS393AMTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V, ±1V ~ 18V
- :
- 3mV @ 5V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 16mA @ 5V
- Current - Output (Typ):
- 1mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
AS393AMTR-E1 FAQ
1.How can I place an order for AS393AMTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AS393AMTR-E1 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 AS393AMTR-E1 reliable?
The price and inventory of AS393AMTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AS393AMTR-E1 is usually 5 days.
3.What payment methods are accepted for AS393AMTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AS393AMTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AS393AMTR-E1?
AS393AMTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AS393AMTR-E1 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 AS393AMTR-E1?
For technical support, including AS393AMTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AS393AMTR-E1 requirements.
6.How does Aetrix verify that AS393AMTR-E1 is sourced from the original manufacturer or authorized distributors?
All AS393AMTR-E1 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 AS393AMTR-E1 meets industry standards.
7.What is the process for return or replacement of AS393AMTR-E1?
All AS393AMTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AS393AMTR-E1, 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 AS393AMTR-E1 part is unused and in its original packaging.
Return procedure for AS393AMTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AS393AMTR-E1 Tags
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