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.


  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




Output Type

Single phase output = 0 to 2.5V

Operation Temperature

-40 to 105 degrees Celsius

Input Voltage Range


Non-linearity (NL 200 )


Gain Error (Ta = 25 degrees Celsius)

Supply Current(Input) 8.6mA(typ.)

Common Mode Transient

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 )


Gain Error (Ta = 25 degrees Celsius)


Supply Current (Input)


Common Mode Transient

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

Isolation Voltage   5000Vrms

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