Overview
The AMC1304L25DWR is a high-precision, reinforced isolated delta-sigma (ΔΣ) modulator produced by Texas Instruments. This device is designed to provide highly accurate analog-to-digital conversion while ensuring robust isolation between the input and output circuits. The AMC1304L25DWR features a capacitive double isolation barrier, certified to provide reinforced isolation of up to 7000 VPEAK according to DIN VDE V 0884-11, UL1577, and CSA standards. This isolation prevents noise currents on high common-mode voltage lines from interfering with or damaging low-voltage circuitry.
The device is optimized for direct connection to shunt resistors or other low-voltage-level signal sources, with a unique low input voltage range of ±250 mV. It achieves 16 bits of resolution with a dynamic range of 81 dB (13.2 ENOB) at a data rate of 78 kSPS when used with an appropriate digital filter.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | ±250 mV | mV |
| Differential Input Resistance | 25 kΩ | kΩ |
| Digital Output Interface | LVDS | - |
| Supply Voltage (LDOIN) | 4.0 V to 18.0 V | V |
| Controller-side Supply Voltage (DVDD) | 3.0 V to 5.5 V | V |
| Operating Ambient Temperature Range | –40°C to +125°C | °C |
| Maximum Power Dissipation (High-side Supply) | 117 mW | mW |
| Maximum Power Dissipation (Low-side Supply) | 44 mW | mW |
| Package Type | SOIC-16 (DW) | - |
| Body Size | 10.30 mm × 7.50 mm | mm |
Key Features
- High-Precision Conversion: Achieves 16 bits of resolution with a dynamic range of 81 dB (13.2 ENOB) at a data rate of 78 kSPS.
- Reinforced Isolation: Certified to provide reinforced isolation of up to 7000 VPEAK according to DIN VDE V 0884-11, UL1577, and CSA standards.
- Low Input Voltage Range: Optimized for direct connection to shunt resistors or other low-voltage-level signal sources with a range of ±250 mV.
- Integrated LDO Regulator: Allows an unregulated input voltage between 4 V and 18 V on the high side.
- Digital Interface: Operates with an LVDS interface, ensuring high-speed and low-noise data transmission.
- Wide Operating Temperature Range: Specified from –40°C to +125°C, making it suitable for various industrial and automotive applications.
Applications
- Industrial Automation: Used in current sensing and monitoring in industrial control systems.
- Automotive Systems: Applied in battery management systems, motor control, and other high-voltage applications.
- Medical Devices: Utilized in medical equipment requiring high isolation and precision, such as patient monitoring systems.
- Power Supplies and Grid Systems: Employed for current measurement and monitoring in power supplies and grid systems.
Q & A
- What is the primary function of the AMC1304L25DWR?
The AMC1304L25DWR is a high-precision, reinforced isolated delta-sigma modulator used for analog-to-digital conversion in high-isolation applications.
- What is the input voltage range of the AMC1304L25DWR?
The input voltage range is ±250 mV.
- What type of digital output interface does the AMC1304L25DWR use?
The device uses an LVDS (Low-Voltage Differential Signaling) interface.
- What are the operating temperature ranges for the AMC1304L25DWR?
The device operates from –40°C to +125°C.
- What is the maximum power dissipation for the high-side supply of the AMC1304L25DWR?
The maximum power dissipation for the high-side supply is 117 mW.
- What is the package type and body size of the AMC1304L25DWR?
The device is packaged in a SOIC-16 (DW) with a body size of 10.30 mm × 7.50 mm.
- What standards does the isolation barrier of the AMC1304L25DWR comply with?
The isolation barrier complies with DIN VDE V 0884-11, UL1577, and CSA standards.
- How does the AMC1304L25DWR achieve high precision in its conversions?
The device achieves high precision by using a delta-sigma modulator and an appropriate digital filter to decimate the bit stream, resulting in 16 bits of resolution.
- What are some common applications of the AMC1304L25DWR?
Common applications include industrial automation, automotive systems, medical devices, and power supplies and grid systems.
- What is the purpose of the integrated LDO regulator in the AMC1304L25DWR?
The integrated LDO regulator allows an unregulated input voltage between 4 V and 18 V on the high side, providing a stable supply voltage.
