Overview
The AMC1351-Q1 is a precision, isolated amplifier designed by Texas Instruments for high-accuracy voltage sensing in various automotive and industrial applications. This device is AEC-Q100 qualified, ensuring it meets stringent automotive standards, and is functional safety-capable, making it suitable for safety-critical systems. The AMC1351-Q1 features a reinforced isolation barrier, providing up to 5 kVRMS of galvanic isolation, and supports a wide operating temperature range from –40°C to +125°C.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Power-supply voltage (High-side VDD1 to GND1) | -0.3 | 6.5 | V | |
| Power-supply voltage (Low-side VDD2 to GND2) | -0.3 | 6.5 | V | |
| Analog input voltage (IN) | -1 | 15 | V | |
| Analog output voltage (OUTP, OUTN) | -0.5 | 0.5 VDD2 + 0.5 | V | |
| Linear input voltage range | -0.25 | 5 | V | |
| High input impedance | 1.25 MΩ | Ω | ||
| Fixed gain | 0.4 V/V | |||
| Offset error | -1.5 | 1.5 | mV | |
| Offset drift | -15 | 15 | μV/°C | |
| Gain error | -0.2% | 0.2% | ||
| Gain drift | -35 | 35 | ppm/°C | |
| Nonlinearity | -0.02% | 0.02% | ||
| Common-mode transient immunity (CMTI) | 100 | 150 | kV/μs | |
| Operating temperature range (TA) | -40 | 125 | °C |
Key Features
- AEC-Q100 qualified for automotive applications with a temperature grade 1: –40°C to +125°C.
- Functional safety-capable with documentation available to aid in functional safety system design.
- Linear input voltage range from –0.25 V to 5 V.
- High input impedance of 1.25 MΩ (typical).
- Fixed gain of 0.4 V/V.
- Low DC errors including offset error, offset drift, gain error, and gain drift.
- Operation on high-side and low-side with 3.3 V or 5 V power supplies.
- High common-mode transient immunity (CMTI) of 100 kV/μs (minimum).
- Fail-safe output and reinforced galvanic isolation up to 5 kVRMS.
- Safety-related certifications including VDE V 0884-11 and UL1577.
Applications
- DC voltage sensing in applications requiring high common-mode voltages such as motor drives and frequency inverters.
Q & A
- What is the operating temperature range of the AMC1351-Q1?
The AMC1351-Q1 operates over a temperature range from –40°C to +125°C.
- What are the power supply voltage ranges for the AMC1351-Q1?
The high-side power supply (VDD1) and low-side power supply (VDD2) can range from 3 V to 5.5 V.
- What is the linear input voltage range of the AMC1351-Q1?
The linear input voltage range is from –0.25 V to 5 V.
- What is the typical input impedance of the AMC1351-Q1?
The typical input impedance is 1.25 MΩ.
- What is the fixed gain of the AMC1351-Q1?
The fixed gain is 0.4 V/V.
- What are the safety-related certifications for the AMC1351-Q1?
The AMC1351-Q1 is certified according to DIN VDE V 0884-11 and recognized under UL1577.
- What is the common-mode transient immunity (CMTI) of the AMC1351-Q1?
The CMTI is at least 100 kV/μs.
- What is the maximum power dissipation for the AMC1351-Q1?
The maximum power dissipation is 96 mW when both sides are powered at 5.5 V.
- What are the typical applications of the AMC1351-Q1?
Typical applications include isolated voltage sensing in traction inverters, onboard chargers, DC/DC converters, and HEV/EV DC chargers.
- Is the AMC1351-Q1 functional safety-capable?
Yes, the AMC1351-Q1 is functional safety-capable with available documentation to aid in functional safety system design.
