Overview
The AMC1203DUBR, produced by Texas Instruments, is a precision, galvanically isolated, delta-sigma (ΔΣ) modulator. This device is designed to provide high-resolution measurement capabilities, particularly in applications requiring isolation between different common-mode voltage levels. The AMC1203 features an internal 10MHz clock generator and is optimized for direct connection to shunt resistors or other low-impedance signal sources. It achieves 16 bits of resolution with an 87dB dynamic range and a 39kSPS data rate when combined with a digital low-pass filter such as a sinc3, OSR 256 filter. The device is available in a SOP-8 gull-wing package (DUB) and is characterized over an ambient temperature range of –40°C to +105°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Linear Input Voltage Range | ±280mV | mV |
| Supply Voltage Range (High Side) | 4.5V to 5.5V | V |
| Supply Voltage Range (Low Side) | 4.5V to 5.5V | V |
| Offset Error (AMC1203) | ±1mV (max) | mV |
| Offset Drift (AMC1203) | ±5µV/°C (max) | µV/°C |
| Gain Error (AMC1203) | ±2% (max) | % |
| Gain Drift (AMC1203) | ±20ppm/°C (max) | ppm/°C |
| Transient Immunity | 15kV/µs (min) | kV/µs |
| Internal Clock Generator | 10MHz | MHz |
| Safety-Related Certifications | 4000VPEAK basic isolation per DIN EN IEC 60747-17 (VDE 0884-17), 2800VRMS isolation for 1 minute per UL1577 | VPEAK, VRMS |
| Specified Temperature Range | –40°C to +105°C | °C |
| Resolution | 16 Bits | Bits |
| Dynamic Range | 87dB | dB |
| Data Rate | 39kSPS | kSPS |
Key Features
- Galvanic Isolation: The AMC1203 provides basic isolation of up to 3800VPEAK, certified according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 standards, making it highly resistant to magnetic interference.
- Precision Current Sensing: Optimized for direct connection to shunt resistors or other low-impedance signal sources, ensuring accurate current measurements.
- Internal Clock Generator: Features an internally generated 10MHz clock, synchronizing the output bitstream.
- High Resolution and Dynamic Range: Achieves 16 bits of resolution with an 87dB dynamic range and a 39kSPS data rate when combined with a digital low-pass filter.[
- Low DC Errors: Offers low offset error (±1mV max), offset drift (±5µV/°C max), gain error (±2% max), and gain drift (±20ppm/°C max).[
- Wide Operating Temperature Range: Characterized over an ambient temperature range of –40°C to +105°C.[
Applications
- Current Monitoring: Suitable for high-resolution current measurement in various industrial and automotive applications.
- Industrial Process Control: Used in systems requiring precise measurement and control, such as in motor positioning and industrial automation.[
- Motor Positioning Systems: Ideal for applications that demand accurate and isolated measurement of motor currents.[
Q & A
- What is the linear input voltage range of the AMC1203?
The linear input voltage range of the AMC1203 is ±280mV.[
- What are the supply voltage ranges for the AMC1203?
The supply voltage ranges for both the high side and low side are 4.5V to 5.5V.[
- What is the resolution and dynamic range of the AMC1203 when used with a digital low-pass filter?
The AMC1203 achieves 16 bits of resolution with an 87dB dynamic range when combined with a digital low-pass filter such as a sinc3, OSR 256 filter.[
- What is the internal clock frequency of the AMC1203?
The AMC1203 features an internally generated 10MHz clock.[
- What are the safety-related certifications for the AMC1203?
The AMC1203 is certified for 4000VPEAK basic isolation per DIN EN IEC 60747-17 (VDE 0884-17) and 2800VRMS isolation for 1 minute per UL1577.[
- What is the specified temperature range for the AMC1203?
The specified temperature range for the AMC1203 is –40°C to +105°C.[
- What types of packages are available for the AMC1203?
The AMC1203 is available in SOP-8 gull-wing (DUB), SOP-8 (PSA), and SOIC-16 (DW) packages.[
- What are the typical applications of the AMC1203?
The AMC1203 is typically used in current monitoring, industrial process control, and motor positioning systems.[
- How does the AMC1203 handle transient immunity?
The AMC1203 has a transient immunity of 15kV/µs (min).[
- What are the DC error specifications for the AMC1203?
The AMC1203 has an offset error of ±1mV (max), offset drift of ±5µV/°C (max), gain error of ±2% (max), and gain drift of ±20ppm/°C (max).[
