STMicroelectronics EVALST-ISOSD61T

Overview

EVALST-ISOSD61T from STMicroelectronics is a dedicated evaluation board for the ISOSD61 galvanically isolated 1-bit sigma-delta modulator, enabling full characterization of its 16-bit no-missing-codes A/D conversion, ±320 mV differential input range, and 6 kV isolation barrier in industrial sensing applications.

For engineers reviewing the EVALST-ISOSD61T datasheet, EVALST-ISOSD61T pinout, EVALST-ISOSD61T application, or EVALST-ISOSD61T equivalent, this board supports rapid validation of isolated current/voltage measurement systems using coaxial or header-based signal access, TTL/CMOS digital I/O interface, and external 25 MHz clock synchronization.

Technical Context

The EVALST-ISOSD61T implements direct hardware access to the ISOSD61's isolated sigma-delta output stream, with separate primary-side analog input terminals (VINP/VINN) and secondary-side digital outputs (DOUT, CLKIN), supporting real-time bitstream capture and external digital filtering.

It provides configurable power domains (VDD1/VDD2), on-board shunt sensor pads for current-sensing integration, and dual physical interfaces-coaxial connectors for high-noise immunity and header pins for breadboard or test fixture use-within –40°C to +125°C operating range compliance.

Key Specifications

Availability

EVALST-ISOSD61T is available at Aetrix Electronics and suitable for isolated current sensing, motor phase monitoring, and industrial power supply feedback loops requiring stable component supply and rapid prototyping capability.

Supply support for EVALST-ISOSD61T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The EVALST-ISOSD61T belongs to ST's isolated analog signal conditioning evaluation platform family, developed specifically to accelerate design-in of high-CMTI isolated modulators in energy metering, motor control, and industrial power conversion systems.

FAQ

Does EVALST-ISOSD61T include an integrated digital filter?

No. The board exposes the raw 1-bit sigma-delta bitstream from the ISOSD61 modulator and requires external digital filtering (e.g., SINC3 filter in FPGA or MCU) to reconstruct 16-bit data. No on-board decimation logic is present.

Can EVALST-ISOSD61T be used with non-ST microcontrollers?

Yes. Its DOUT and CLKIN signals are standard TTL/CMOS-compatible, allowing direct connection to any host controller with sufficient GPIO and clock resources, including ARM Cortex-M, Xilinx Zynq, or Renesas RA series devices.

What physical interfaces does EVALST-ISOSD61T provide for analog inputs?

The board offers both coaxial connectors (for low-noise, shielded signal routing) and header pins (for breadboard or probe-based access) to VINP and VINN, enabling flexible test setup across lab and field conditions.

Is a shunt resistor included on the EVALST-ISOSD61T board?

No. The board provides dedicated solder pads for user-installed shunt resistors but does not populate one. This allows selection of value and power rating based on target current range and thermal requirements.