Renesas ISL26104AV28EV1Z

Overview

The ISL26104AV28EV1Z from Renesas is an evaluation board designed to characterize the ISL26104 24-bit delta-sigma ADC, featuring galvanic isolation between the ADC and USB interface, on-board AT90USB162 microcontroller, integrated ISL21090 2.5V voltage reference, and support for gain settings up to 128× and sample rates from 2.5 Sps to 4000 Sps.

For engineers reviewing the ISL26104AV28EV1Z datasheet, ISL26104AV28EV1Z pinout, ISL26104AV28EV1Z application, or ISL26104AV28EV1Z equivalent, this board enables full functional validation of the ISL26104 ADC-including offset calibration, time-domain capture, noise histogram analysis, and FFT-based frequency-domain evaluation-under isolated, low-noise lab conditions.

Technical Context

The ISL26104AV28EV1Z implements a two-section galvanically isolated architecture: the left-side ADC section (powered by external lab supply) hosts the ISL26104, ISL21090 2.5V reference, and banana-jack analog input terminals; the right-side microcontroller section (powered via USB) integrates the AT90USB162 with USB HID interface and SI8441BB quad-channel digital isolator bridging SPI signals (CS, SDI, SDO/RDY, SCLK).

Hardware configuration is performed via evaluation software that writes to ISL26104 on-chip registers to set gain (1×–128×), sample rate (2.5–4000 Sps), input multiplexer channel (AIN1–AIN4 differential pairs), and common-mode bias (2.5V, AGND, RDIV, or floating). The board supports both internal crystal (4.9152 MHz) and external clock or RC oscillator modes.

Key Specifications

Availability

The ISL26104AV28EV1Z is available at Aetrix Electronics and suitable for high-precision sensor interface validation, industrial data acquisition system prototyping, and low-noise metrology equipment development requiring stable component supply and traceable evaluation hardware.

Supply support for ISL26104AV28EV1Z 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

Renesas Electronics is a global semiconductor manufacturer specializing in microcontrollers, analog & power devices, and advanced SoCs for industrial, automotive, and infrastructure applications.

The ISL26104AV28EV1Z belongs to Renesas' Industrial Analog and Power evaluation platform family, engineered specifically to accelerate design-in of high-resolution delta-sigma ADCs in noise-sensitive measurement systems.

FAQ

What is the primary function of the ISL26104AV28EV1Z?

The ISL26104AV28EV1Z is an evaluation board for the ISL26104 24-bit delta-sigma ADC. It provides galvanically isolated SPI communication between the ADC and a host PC via USB, enabling full characterization-including gain, sample rate, and input channel configuration-using bundled Windows evaluation software. The ISL26104AV28EV1Z supports noise-sensitive applications by separating analog measurement circuitry from noisy USB ground paths.

Does the ISL26104AV28EV1Z require external power supplies?

Yes-the ISL26104AV28EV1Z requires two independent power sources: the ADC section must be powered via banana jacks (AVDD = 5V, DVDD = 3.3–5V, AGND), while the microcontroller section draws 5V directly from the USB connection. No power sequencing is required; either section may be powered or unpowered independently without affecting the other. The ISL26104AV28EV1Z does not operate from USB alone.

Can the ISL26104AV28EV1Z evaluate other ADCs besides the ISL26104?

Yes-the ISL26104AV28EV1Z board is designed to accommodate the ISL26102 as a drop-in replacement for the ISL26104 (per Section 2.1 of the manual), and its header J20 provides access to all ISL26104 signal pins (including AVDD, DVDD, AIN+, AIN−, VREF+, VREF−, CS, SDI, SDO/RDY, SCLK) for integration into custom systems. However, evaluation software functionality is calibrated and validated exclusively for the ISL26104.

What analysis features does the ISL26104AV28EV1Z evaluation software provide?

The ISL26104AV28EV1Z evaluation software offers three core analysis modes: Time Domain (acquisition up to 1M samples with zoom/pan tools), Histogram (noise distribution with mean and ±1σ markers), and Frequency Domain (FFT with configurable windowing, averaging, log-frequency scaling, and grounded-input SNR calculation). All modes support saving raw data, processed results, and register configurations in standardized text or Excel formats.

Is USB driver installation required to use the ISL26104AV28EV1Z?

No-ISL26104AV28EV1Z uses the standard Windows USB HID class driver, which is built into Windows XP and later. No additional drivers or firmware flashing are needed. When connected, the board appears as a generic HID device; the evaluation software communicates directly with the AT90USB162 microcontroller's pre-programmed HID interface. Connection status is displayed in real time within the software GUI.