Texas Instruments AMC22C11QDRQ1

Overview

AMC22C11QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive isolated comparator with galvanic SiO₂ barrier, adjustable 20mV–2.7V trip threshold via 100μA reference current, ±1% max trip error at 250mV, 240ns typical propagation delay, and open-drain output supporting transparent or latch mode - deployed in HEV/EV traction inverters for overcurrent detection.

For engineers reviewing the AMC22C11QDRQ1 datasheet, AMC22C11QDRQ1 pinout, AMC22C11QDRQ1 application, or AMC22C11QDRQ1 equivalent, key selection criteria include its 75V/ns CMTI, 3kVRMS isolation rating per UL1577 and VDE 0884-17, wide 3V–25V high-side supply range, and latch-mode control for fault-hold behavior in safety-critical power systems.

Technical Context

The AMC22C11QDRQ1 implements a capacitive SiO₂ isolation barrier between input (high-side) and output (low-side) domains, enabling galvanic separation up to 4250VPK basic isolation. Its comparator core uses internal hysteresis (4mV low-mode / 25mV high-mode) and references a precision 100μA ±1% current source to set trip thresholds via external resistor on REF pin.

Operation supports two functional modes: transparent mode (LATCH = GND2) where OUT follows IN state, and latch mode (LATCH = VDD2) where OUT remains asserted until cleared by LATCH falling edge. Startup timing includes 45µs high-side blanking and 100µs fault detection delay to suppress transients during power-up.

Key Specifications

Pinout & Package

AMC22C11QDRQ1 is housed in an 8-pin SOIC (D package), 4.9mm × 6mm body size, with creepage and clearance ≥4mm, DTI ≥15.4µm, and material group II per IEC 60664-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated comparator applications.

Compared with AMC1301QDWQ1 and SI8920BD-IS, the AMC22C11QDRQ1 uniquely integrates a precision 100μA reference, adjustable hysteresis modes, and configurable latch functionality in a single AEC-Q100 qualified device - reducing component count and validation effort for automotive overcurrent protection.

Availability

AMC22C11QDRQ1 is available at Aetrix Electronics and suitable for HEV/EV traction inverters, onboard chargers (OBC), and DC/DC converters requiring stable component supply, long-term automotive lifecycle support, and guaranteed AEC-Q100 compliance.

Supply support for AMC22C11QDRQ1 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 leader specializing in analog, embedded processing, and high-reliability ICs for automotive, industrial, and communications markets.

The AMC22C11QDRQ1 belongs to TI's automotive-grade isolated analog interface product line, designed specifically for high-speed, high-accuracy fault detection in electric vehicle power systems with stringent safety and longevity requirements.

FAQ

What is the maximum adjustable threshold voltage for the AMC22C11QDRQ1?

The AMC22C11QDRQ1 supports an adjustable threshold range of 20mV to 2.7V. This is achieved using the internal 100μA ±1% reference current and an external resistor connected from REF to GND1. At VREF ≥ 600mV, the device automatically enters high-hysteresis mode (25mV), while below 500mV it operates in low-hysteresis mode (4mV). The AMC22C11QDRQ1 maintains ±1% trip error at 250mV across temperature.

How does the latch function operate in the AMC22C11QDRQ1?

In the AMC22C11QDRQ1, the LATCH pin controls output behavior: when pulled high to VDD2, the open-drain output enters latch mode and remains asserted after a trip event until the LATCH signal falls. When tied to GND2, it operates in transparent mode, where OUT directly follows the comparator state. The AMC22C11QDRQ1 requires explicit LATCH pin termination - floating is prohibited per datasheet Section 4.

What isolation certifications does the AMC22C11QDRQ1 hold?

The AMC22C11QDRQ1 is certified to DIN EN IEC 60747-17 (VDE 0884-17) for 4250VPK basic isolation and UL1577 for 3000VRMS withstand voltage. It meets AEC-Q100 Grade 1 (–40°C to +125°C) and carries VDE certificate number 40047657 and UL file number E181974. These ratings apply to the full 8-pin SOIC package with specified creepage/clearance ≥4mm.

Can the AMC22C11QDRQ1 be used with a 48V battery system?

Yes - the AMC22C11QDRQ1 high-side supply supports 3V to 25V, making it compatible with 48V nominal battery systems when used with appropriate level-shifting or resistive divider networks on the IN pin. Its input voltage range (–400mV to 4V relative to GND1) and 75V/ns CMTI ensure robust operation in noisy 48V architectures such as 48V mild-hybrid DC/DC converters. The AMC22C11QDRQ1's thermal derating curves confirm safe operation at TA = 125°C under these conditions.

What is the typical propagation delay of the AMC22C11QDRQ1 and how is it affected by overdrive?

The AMC22C11QDRQ1 has a typical propagation delay of 240ns at 10mV overdrive and 210ns at 50mV overdrive (VDD2 = 3.3V, CL = 15pF). Delay decreases with higher overdrive due to faster internal comparator slewing. The AMC22C11QDRQ1 maintains sub-380ns max delay across –40°C to +125°C, enabling precise timing in fast-switching inverters where fault response must occur within one PWM cycle at 20kHz.