Broadcom ACPL-C740-500E

Модулятор116 bСерийный±0,2 В, 3 В ~ 5,5 В-40°C ~ 110°CПоверхностный монтаж8-SOIC (ширина 0,268", 6,81 мм)

Overview

The Broadcom® ACPL-C740-500E is a 1-bit, second-order sigma-delta (Σ-Δ) modulator that converts an analog input signal into a high-speed data stream with galvanic isolation based on optical coupling technology. The ACPL-C740-500E operates from a 5V power supply with dynamic range of 86dB with an appropriate digital filter. The differential inputs of ±200 mV (full scale ±320 mV) are ideal for direct connection to shunt resistors or other low-level signal sources in applications, such as motor phase current measurement.The analog input is continuously sampled by a means of sigma-delta over-sampling using an onboard clock. The signal information is contained in the modulator data, as a density of ones with data rate of 20 MHz, and the data are encoded and transmitted across the isolation boundary where they are recovered and decoded into high-speed data stream of digital ones and zeros. The original signal information can be reconstructed with a digital filter.The serial interface for data and clock has a wide supply range of 3V to 5.5V.Combined with superior optical-coupling technology, the modulator delivers high noise margins and excellent immunity against isolation-mode transients. With 0.5-mm minimum distance through insulation (DTI), the ACPL-C740-500E provides reliable reinforced insulation and high working insulation voltage, which is suitable for fail-safe designs. This outstanding isolation performance is superior to alternatives, including devices based on capacitive- or magnetic-coupling with DTI in micro-meter range. Offered in a Stretched SO-8 (SSO-8) package, the isolated ADC delivers the reliability, small size, superior isolation, and over-temperature performance that motor drive designers need to accurately measure current at a much lower price compared to traditional current transducers.

Features

Applications

• Digital signal processing
• Scientific instruments
• Rotary encoder
• Displaying
• Transducer
• Microcontrollers.
• Digital Storage Oscilloscope
• Scientific instruments.
• Music reproduction technology
• Communication Systems