Overview
The AMC1311BQDWVRQ1 is a precision, isolated amplifier designed by Texas Instruments for automotive and high-reliability applications. This component is part of the AMC1311x-Q1 family and is AEC-Q100 qualified, ensuring it meets stringent automotive standards. It features a 2-V, high-impedance input voltage range, optimized for isolated voltage measurement, and is functional safety-capable, making it suitable for critical systems. The device operates over a wide temperature range from –55°C to +125°C and provides reinforced galvanic isolation, protecting the low-voltage side from high-voltage electrical damage.
Key Specifications
| Parameter | AMC1311-Q1 | AMC1311B-Q1 |
|---|---|---|
| Input Offset Voltage (VOS) | ±9.9 mV (maximum) | ±1.5 mV (maximum) |
| Input Offset Drift (TCVOS) | ±20 µV/°C (typical) | ±10 µV/°C (maximum) |
| Gain Error (EG) | ±1% (maximum) | ±0.2% (maximum) |
| Gain Error Drift (TCEG) | ±30 ppm/°C (typical) | ±40 ppm/°C (maximum) |
| Nonlinearity | 0.04% (maximum) | 0.04% (maximum) |
| Common-Mode Transient Immunity (CMTI) | 15 kV/µs (minimum) | 100 kV/µs (minimum) |
| Operating Temperature Range | –40°C to +125°C | –55°C to +125°C |
| Supply Voltage (VDD1, VDD2) | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Input Voltage Range (VIN) | –0.1 V to 2 V | –0.1 V to 2 V |
| Output Bandwidth | 100 kHz to 220 kHz | 220 kHz to 275 kHz |
Key Features
- AEC-Q100 Qualified: Meets automotive standards for reliability and performance.
- Functional Safety-Capable: Designed to aid in functional safety system design.
- High-Impedance Input: Optimized for connection to high-impedance resistive dividers or other high-impedance voltage signal sources.
- Fixed Gain: Fixed gain of 1 for straightforward voltage measurement.
- Low DC Errors: Low offset error, offset drift, gain error, and gain drift for accurate measurements.
- Reinforced Isolation: Provides up to 5 kVRMS isolation according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577.
- Missing High-Side Supply Indication: Simplifies system-level design and diagnostics.
- High CMTI: High common-mode transient immunity to resist magnetic interference.
Applications
- Isolated Voltage Sensing: Used in traction inverters, onboard chargers, and DC/DC converters.
- Automotive Systems: Suitable for various automotive applications requiring high reliability and precision voltage measurement.
- Industrial Control Systems: Can be used in industrial environments where isolated voltage sensing is critical.
Q & A
- What is the operating temperature range of the AMC1311B-Q1?
The operating temperature range is from –55°C to +125°C.
- What is the input voltage range of the AMC1311B-Q1?
The input voltage range is from –0.1 V to 2 V.
- What is the gain of the AMC1311B-Q1?
The gain is fixed at 1.
- What is the common-mode transient immunity (CMTI) of the AMC1311B-Q1?
The CMTI is 100 kV/µs (minimum).
- Is the AMC1311B-Q1 AEC-Q100 qualified?
- What type of isolation does the AMC1311B-Q1 provide?
- What is the output bandwidth of the AMC1311B-Q1?
- Does the AMC1311B-Q1 have a missing high-side supply indication feature?
- What are the typical applications of the AMC1311B-Q1?
- Is the AMC1311B-Q1 functional safety-capable?
