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Overview

The ACPL-C740 Σ-Δ modulator is based on optical coupling technology that converts analog input signals into high-speed data streams with current isolation. The ACPL-C740 is powered by a 5V supply and has a dynamic range of 83dB with a specified digital filter. Differential inputs of ±200mV (full scale ±320mV) are ideal for direct connection of shunt resistors. The input can also be used for other low-level signal sources in the application. The ACPL-C740 has an analog input that allows continuous sampling via an onboard clock and with the help of sigma-δ oversampler. The signal information is contained in the modulator data, and the data density has a data rate of 20MHz. These data are then encoded and transmitted across isolation boundaries, where they are recovered and decoded into high-speed data streams of the numbers 1 and 0.

The ACPL-C740 features reliable enhanced insulation and a high operating insulation voltage with a minimum insulation penetration distance (DTI) of 0.5mm for fail-safe design. Isolated ADCs offer high reliability, small size, excellent isolation and overheating performance, allowing motor drive designers to accurately measure current.

ACPL-C740-500E

Parameters

Product category: optical isolation amplifier

RoHS: Details

Output type: ADC - ADC

Number of channels: 1

Insulation voltage: 5000 Vrms

Power supply voltage - Max: 5.5V

Supply voltage - Min: 3 V

Package/housing: SSO-8

Minimum operating temperature: -40 °C

Maximum operating temperature: + 110°C

Installation style: SMD/SMT

Amplifier type: Isolation

Ib - Input bias: 30 nA

Isolation type: Optic

Working power supply current: 10 mA

Reference voltage: 320 mV

Features

Excellent optical isolation and insulation

20MHz internal clock

One-bit, second-order sigma-δ modulator

16-bit resolution, no loss of code (12-bit ENOB)

83dB SNR

2μV/°C maximum offset drift

Wide supply voltage range from 3V to 5.5V for digital interfaces

±1% gain error

Internal reference voltage

±200mV linear range, 5V single power supply (±320mV full scale)

Operating temperature range: −40°C to +110°C

Package of SSO-8

25kV/μs common mode transient suppression

Safety and regulatory approval:

IEC/EN/DIN EN 60747-5-5: 1414 Working insulation voltage

UL 1577: Isolation voltage of 5000Vrms per minute

CSA: Component Approval Notice #5

Applications

Servo drive and motor

Motor phase and supply rail current detection

Power inverter current detection

Industrial process control

Data acquisition system

Universal current detection

Alternative to conventional current transmitters

Contact: Mr. Chen

Tel: +8613410018555

Email: sales@hkmjd.com