Toshiba Launches High-precision Optical Coupled Isolation Amplifiers Equipped with a Delta-Sigma AD Converter

TOKYO — (BUSINESS WIRE) — September 11, 2015Toshiba Corporation’s (TOKYO:6502) Semiconductor & Storage Products Company today announced the launch of optical coupled isolation amplifiers with a delta-sigma AD converter that can detect infinitesimal electric current and voltage fluctuation with high-precision, for use in industrial equipment applications. The new products will be in available in analog output and digital output types, and can be provided in either a low height 2.3mm(max) SO8L thin package or a conventional DIP8 package. Shipment of the new products starts today.

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Toshiba: Optical coupled isolation amplifier equipped with a delta-sigma AD converter (Photo: Busine ...

Toshiba: Optical coupled isolation amplifier equipped with a delta-sigma AD converter (Photo: Business Wire)

Monitoring the phase current of motors and BUS voltage fluctuations for accurate feedback to the microcontroller is essential to realizing the high-precision operation required in recent industrial equipment, including inverters and servo amplifiers. In order to meet these requirements, the new optical coupled isolation amplifiers are equipped with a high-precision delta-sigma AD converter on the input side and achieve the industry’s highest level of linearity[1], a performance of 0.02%(typ.)@NL200 for the analog output products and 3LSB(typ.)@INL for the digital output products. The isolation amplifiers also secure a CMTI (Common-Mode Transient Immunity) value of 20kV/μs(typ.), enabling stable operation in motor control applications which usually generate high levels of noise. Furthermore, the 5000V(min.) isolation voltage makes them suitable for use in various industrial equipment applications.

Applications:

  1. Industrial equipment including inverters, servo amplifiers, robots, CNCs and power supplies
  2. Wind turbine and photovoltaic inverters, battery management
  3. UPS, power supplies for servers, battery management and air-conditioners for office and residential use
 

Line-up and Key Specifications:

 

Analog output products

 Part Number   TLP7820   TLP7920
Package

SO8L

 

DIP8

Output Type

Single phase output = 0 to 2.5V

Operation Temperature

-40 to 105 degrees Celsius

Input Voltage Range

±200mV/±300mV(FSR)

Non-linearity (NL 200 )
[±200mV]

0.02%(typ.)

Gain Error (Ta = 25 degrees Celsius)

±0.5/±1/±3%
Supply Current(Input) 8.6mA(typ.)

Common Mode Transient
Immunity

20kV/μs(typ.)@VCM=1kV,Ta = 25 degrees Celsius

Isolation Voltage   5000Vrms
 
 

Digital output products

Part Number   TLP7830   TLP7930
Package SO8L   DIP8
Output Type 1bit digital / CLK Output
Operation Temperature

-40 to 105 degrees Celsius

Input Voltage Range ±200mV/±320mV(FSR)

Integral Non-linearity
(INL 200 )

3LSB(typ.)

Gain Error (Ta = 25 degrees Celsius)

±1%(min/max)

Supply Current (Input)

8.5mA(typ.)

Common Mode Transient
Immunity

20kV/μs(typ.)@VCM=1kV,Ta = 25 degrees Celsius

Isolation Voltage   5000Vrms
 

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