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Texas Instruments AMC22C12QDRQ1
- Part No.:
- AMC22C12QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AMC22C12QDRQ1.pdf
- Description:
- IC COMPARATOR 1 WINDW 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,454
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Product details
Overview
AMC22C12QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade isolated window comparator with galvanic isolation barrier, adjustable ±20mV to ±300mV trip threshold, 280ns typical propagation delay, and open-drain output supporting latch/transparent modes - used for fast overcurrent detection in HEV/EV traction inverters.
For engineers reviewing the AMC22C12QDRQ1 datasheet, AMC22C12QDRQ1 pinout, AMC22C12QDRQ1 application, or AMC22C12QDRQ1 equivalent, key selection considerations include its 55V/ns CMTI, ±1% trip threshold error at 250mV, 3kVRMS isolation rating, and dual-supply operation (3–25V high-side / 2.7–5.5V low-side) in automotive safety-critical monitoring.
Technical Context
The AMC22C12QDRQ1 implements a dual-comparator architecture across an isolation barrier: Cmp0 monitors positive excursions (VREF + VHYS), Cmp1 monitors negative excursions (–VREF – VHYS), enabling true window-comparison centered at 0V. Threshold adjustment is achieved via a precision 100μA ±1% internal current source applied to an external resistor on the REF pin.
It supports two functional modes: window-comparator mode (VREF ≤ 450mV, enabling both comparators) and positive-only comparator mode (VREF ≥ 600mV, disabling Cmp1). Latch mode is activated by pulling LATCH high; transparent mode requires LATCH tied to GND2 - both modes drive the same open-drain OUT pin referenced to GND2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3000VRMS per UL1577; 4250VPK basic isolation per VDE 0884-17 - enables safe monitoring of high-voltage bus signals in EV power stages |
| Propagation Delay | 280ns typical - supports sub-microsecond fault response required for IGBT/MOSFET short-circuit protection |
| Common-Mode Transient Immunity | 55V/ns minimum - ensures reliable operation during fast-switching noise transients in inverter gate drivers |
| Adjustable Trip Threshold | ±20mV to ±300mV (window mode); 600mV to 2.7V (positive-only mode) - allows precise shunt-based current sensing across wide dynamic range |
| Supply Voltage Ranges | High-side: 3V–25V; Low-side: 2.7V–5.5V - supports direct connection to battery rails and MCU I/O domains without level-shifting |
| Threshold Accuracy | ±1% max at 250mV - guarantees consistent trip point across temperature (–40°C to +125°C) and supply variations |
| Output Type | Open-drain OUT referenced to GND2 - enables flexible pull-up to 3.3V or 5V logic, compatible with MCU interrupt inputs |
Pinout & Package
AMC22C12QDRQ1 is housed in an 8-pin SOIC (D package), 4.9mm × 6mm body size, with creepage/clearance ≥4mm and DTI ≥15.4µm - compliant with reinforced insulation requirements for automotive systems up to 560VRMS working voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | High-side power supply | Provides power to input-side comparators and reference circuitry; operates from 3V to 25V - connects directly to HV domain (e.g., shunt side) |
| IN | Analog input | Differential input referenced to GND1; accepts ±4V range - interfaces with current-sense shunt amplifier outputs |
| REF | Reference input | Sinks 100μA ±1% current; sets trip threshold via external resistor - defines both window width and hysteresis |
| GND1 | High-side ground | Return path for VDD1, IN, and REF - forms isolated input domain separated by galvanic barrier |
| GND2 | Low-side ground | Return path for VDD2 and OUT - forms isolated output domain connected to MCU or controller logic |
| OUT | Digital output | Open-drain output referenced to GND2 - requires external pull-up; asserts low on fault condition in either latch or transparent mode |
| LATCH | Digital control input | Active-high signal selecting latch mode (fault latched until reset) or transparent mode (output follows input state) |
| VDD2 | Low-side power supply | Supplies output-side logic; 2.7V–5.5V range - matches standard MCU I/O voltage domains |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for continuous operation from –40°C to +125°C ambient - suitable for under-hood and powertrain applications |
| Adjustable window-comparator architecture | Single-resistor threshold tuning from ±20mV to ±300mV - eliminates need for external op-amps or precision references in shunt-based current sensing |
| Configurable latch/transparent output mode | LATCH pin selects between self-clearing (transparent) or persistent fault signaling (latch) - simplifies host MCU firmware handling of transient faults |
| High CMTI (55V/ns min) | Immune to fast dv/dt noise from SiC/GaN switching - prevents false triggering during high-frequency inverter commutation |
| Galvanic isolation barrier | 3000VRMS withstand, 560VRMS working voltage - enables safe, accurate measurement of high-side shunt voltages without ground-loop interference |
Applications
| Overcurrent Protection in Traction Inverters | Overvoltage Monitoring in DC/DC Converters |
|---|---|
Use Scenario: Real-time detection of phase-leg short circuits or motor winding faults in 400V/800V EV traction inverters using high-side shunt resistors. IC Role / Device Role / Timing Role: Isolated window comparator comparing shunt voltage against programmable ±250mV threshold; asserts fault within 280ns. Use Value: Enables IGBT/SiC MOSFET turn-off before destructive energy accumulation - critical for ASIL-D system compliance. | Use Scenario: Monitoring output rail stability in automotive 12V/48V bidirectional DC/DC converters during load transients or regenerative braking events. IC Role / Device Role / Timing Role: Positive-only comparator mode (VREF = 1.8V) detects overvoltage excursions beyond 1.8V ±1% on regulated output. Use Value: Provides deterministic, isolated overvoltage flag to system controller - avoids false trips from common-mode noise on high-power converter outputs. |
| Onboard Charger (OBC) Input Current Limiting | EV Charging Pile Ground Fault Detection |
Use Scenario: Enforcing maximum input current limits during AC-to-DC conversion in 11kW OBCs using primary-side shunt sensing. IC Role / Device Role / Timing Role: Window comparator operating at ±100mV threshold on isolated current-sense signal; drives fault interrupt to OBC MCU. Use Value: Delivers <300ns response to overcurrent events - meets IEC 61851-1 fast-trip requirements for grid-connected chargers. | Use Scenario: Detecting leakage currents >30mA in EV charging piles using isolation transformer secondary sensing. IC Role / Device Role / Timing Role: High-accuracy ±30mV window comparator on isolated sense signal; latch mode holds fault until manual reset. Use Value: Meets IEC 62752 RCD Class A requirements with ±1% threshold tolerance - ensures reliable personnel protection without nuisance tripping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMC1301QDWQ1 | Isolated delta-sigma modulator (not comparator); requires external digital filter and logic for threshold detection | Used where high-resolution current measurement is needed alongside fault detection - not a direct replacement for fast window-compare function | Select AMC1301QDWQ1 only when analog output or higher resolution is required; AMC22C12QDRQ1 provides faster, simpler fault assertion. |
| ISO224BQDWQ1 | Isolated analog amplifier (gain = 8.2) with ±10V input range; no built-in comparison or latch logic | Used for isolated voltage/current measurement feeding into MCU ADC - lacks integrated decision-making capability | Choose ISO224BQDWQ1 when analog feedback is needed; AMC22C12QDRQ1 delivers immediate digital fault flag without processing overhead. |
Compared with AMC1301QDWQ1 and ISO224BQDWQ1, the AMC22C12QDRQ1 uniquely integrates galvanically isolated window comparison, adjustable threshold, and latch/transparent output logic in a single 8-pin SOIC - eliminating external components and software latency for time-critical automotive fault detection.
Availability
AMC22C12QDRQ1 is available at Aetrix Electronics and suitable for HEV/EV traction inverters, onboard chargers (OBC), and DC/DC converters requiring stable component supply with automotive-grade reliability and long-term production support.
Supply support for AMC22C12QDRQ1 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
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and automotive ICs, with leadership in high-reliability isolation technology and functional safety certification.
The AMC22C12QDRQ1 belongs to TI's automotive isolated comparator product line, designed specifically for fast, accurate overcurrent and overvoltage fault detection in high-voltage electric vehicle power systems.
FAQ
What is the maximum working voltage supported by the AMC22C12QDRQ1 isolation barrier?
The AMC22C12QDRQ1 supports a maximum rated isolation working voltage of 560VRMS per DIN EN IEC 60747-17 (VDE 0884-17), validated for continuous operation in automotive environments. This enables safe monitoring of 400V and 800V battery systems with margin, and is distinct from its 3000VRMS 1-minute withstand rating per UL1577.
How does the AMC22C12QDRQ1 achieve adjustable trip thresholds without external op-amps?
The AMC22C12QDRQ1 integrates a precision 100μA ±1% current source connected to the REF pin. By connecting an external resistor from REF to GND1, the voltage drop across that resistor sets the trip threshold - e.g., a 2.5kΩ resistor yields 250mV, defining a ±250mV window. This eliminates external amplifiers while maintaining ±1% accuracy.
Can the AMC22C12QDRQ1 be used in positive-only comparator mode, and how is it enabled?
Yes - the AMC22C12QDRQ1 enters positive-only comparator mode when the voltage on the REF pin exceeds 550mV (with 50mV hysteresis). In this mode, the negative comparator (Cmp1) is disabled, and only the positive comparator (Cmp0) remains active, supporting reference voltages up to 2.7V for supply rail monitoring applications.
What is the purpose of the LATCH pin on the AMC22C12QDRQ1, and what happens if it is left unconnected?
The LATCH pin selects between transparent mode (LATCH = low) and latch mode (LATCH = high). In transparent mode, the OUT pin follows the comparator state in real time; in latch mode, OUT remains asserted after fault detection until cleared by toggling LATCH. The pin must never float - tie to GND2 if transparent mode is desired.
Does the AMC22C12QDRQ1 require external filtering on the REF pin, and why?
Yes - a capacitor (20–100nF) is recommended from REF to GND1 to filter noise and improve transient immunity. Because the REF pin sources/sinks a precise 100μA current, any noise on this node directly modulates the trip threshold. Placing the capacitor close to the pin minimizes loop area and maintains ±1% accuracy under EMI stress.
AMC22C12QDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Window
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 3V ~ 25V
- :
- -
- Voltage - Input Offset (Max):
- 0.025µA @ 4V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 2.2mA, 4.3mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 410ns
- Propagation Delay (Max):
- 25mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- 8-SOIC
AMC22C12QDRQ1 FAQ
1.How can I place an order for AMC22C12QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AMC22C12QDRQ1 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 AMC22C12QDRQ1 reliable?
The price and inventory of AMC22C12QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMC22C12QDRQ1 is usually 5 days.
3.What payment methods are accepted for AMC22C12QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMC22C12QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMC22C12QDRQ1?
AMC22C12QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMC22C12QDRQ1 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 AMC22C12QDRQ1?
For technical support, including AMC22C12QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMC22C12QDRQ1 requirements.
6.How does Aetrix verify that AMC22C12QDRQ1 is sourced from the original manufacturer or authorized distributors?
All AMC22C12QDRQ1 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 AMC22C12QDRQ1 meets industry standards.
7.What is the process for return or replacement of AMC22C12QDRQ1?
All AMC22C12QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with AMC22C12QDRQ1, 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 AMC22C12QDRQ1 part is unused and in its original packaging.
Return procedure for AMC22C12QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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