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The AMC1304L25DWR is a ±250mV input, precise current detection enhanced isolated modulator with LDO and LVDS interfaces.

Its main features include

Pin-compatible series optimized for current measurement based on shunt resistors:

The input voltage range is ±50mV or ±250mV

-CMOS or LVDS digital interface options

• Outstanding DC performance, supporting system-level high-precision sensing:

- Offset error: ±50µV or ±100µV (maximum value)

- Offset drift: 1.3µV/°C (maximum value)

- Gain error: ±0.2% or ±0.3% (maximum value)

- Gain drift: ±40ppm/°C (maximum value)

• Safety-related certifications:

-7000 VPK enhanced isolation, in compliance with DIN V VDE V 0884-10 (VDE V 0884-10): 2006-12 standard

-Compliant with UL 1577 standard and with 5000 VRMS isolation for up to 1 minute

- CAN/CSA No.5A Component Acceptance Service Notice, IEC 60950-1 and IEC 60065 terminal equipment standards

• Transient immunity: 15kV/µs (minimum value)

High electromagnetic field immunity (please refer to the application manual SLLA181A)

An external clock input ranging from 5MHz to 20MHz makes it easier to achieve system-level synchronization

• 18V on-chip low voltage drop (LDO) regulator

It can operate within an extended industrial temperature range

Overview

The AMC1304L25DWR is a high-precision Δ-Σ (ΔΣ) modulator that isolates the output and input circuits through a capacitive double isolation gate with high magnetic field immunity. According to DIN V VDE V 0884-10, UL1577 and CSA standards, this isolation barrier has been certified to provide enhanced isolation up to 7000 V peak. When used in conjunction with an isolated power supply, the AMC1304L25DWR can prevent noise currents from common-mode high-voltage lines from entering the local system ground, thereby interfering with or damaging low-voltage circuits.

The input of AMC1304L25DWR has been optimized for direct connection to shunt resistors or other low-voltage level signal sources. With a unique ±50mV low input voltage range, the AMC1304L25DWR can significantly reduce power consumption through shunt, while offering excellent AC and DC performance. By using an appropriate digital filter (i.e., integrated into the TMS320F2807x or TMS320F2837x series) to extract the bit stream, the AMC1304L25DWR can achieve a 16-bit resolution with a dynamic range of 81dB (13.2 ENOB) at a data rate of 78kSPS.

On the high side, the modulator is powered by an integrated low-dropout (LDO) regulator, and the AMC1304L25DWR supports an unregulated input voltage (LDOIN) ranging from 4V to 18V. The isolated digital interface is powered by a 3.3V or 5V power supply (DVDD).

The AMC1304L25DWR is packaged in a wide-body small form factor integrated circuit (SOIC)-16 (DW) package and operates within a temperature range of -40 °C to +125°C.

Application field

The AMC1304L25DWR current measurement based on shunt resistors is used for the following applications:

-Industrial motor drive

-Photoelectric inverter

-Uninterruptible power supply

Isolation voltage measurement

Performance parameters

Product: AMC1304L25DWR

Type: Isolation Module

Number of channels: 1

Resolution (bit) : 16 b

Sampling rate (per second) : 78k

Data interface: LVDS - Serial

Power supply voltage source: Single power supply

Voltage - Power supply: 3V to 5.5V

Operating temperature: -40°C to 125°C

Installation type: Surface mount type

Package/Housing: 16-SOIC

Contact Mingjia Da immediately (www.hkmjd.com) for an exclusive quote on the AMC1304L25DWR!