Analog Devices Inc. EVAL-ADT7420FBZ

Overview

EVAL-ADT7420FBZ from Analog Devices is an evaluation flex board designed for the ADT7420 16-bit digital I²C temperature sensor, enabling remote thermal sensing in high-temperature environments such as oil baths and ovens. It interfaces directly with the EVAL-ADT7x20EBZ main board via high-temp wiring and supports real-time temperature monitoring, alarm threshold configuration, and data logging via PC software.

For engineers reviewing the EVAL-ADT7420FBZ datasheet, EVAL-ADT7420FBZ pinout, EVAL-ADT7420FBZ application, or EVAL-ADT7420FBZ equivalent, this page delivers verified hardware interface details, I²C signal mapping, thermal response validation, USB-powered evaluation workflow, and direct integration guidance with microcontrollers or FPGAs.

Technical Context

The EVAL-ADT7420FBZ is a passive, unpowered flex board that hosts the ADT7420UPCZ temperature sensor IC and minimal support components (0.1 μF decoupling capacitor, two 10 kΩ pull-up resistors). It lacks onboard regulation or logic - all power, clock, and data signals are supplied externally through its 6-pin wire harness.

It implements the ADT7420's native I²C interface (SCL/SDA) with hardware-configured pull-ups and shares the same ±0.25 °C accuracy, 16-bit resolution, and −40 °C to +150 °C operating range as the mounted ADT7420UPCZ die. No firmware, MCU, or USB interface resides on the flex board itself.

Key Specifications

Availability

EVAL-ADT7420FBZ is available at Aetrix Electronics and suitable for industrial oven monitoring, automotive fluid temperature validation, and laboratory-grade thermal chamber calibration requiring stable component supply and traceable evaluation hardware.

Supply support for EVAL-ADT7420FBZ 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

Analog Devices, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control systems.

The EVAL-ADT7420FBZ belongs to Analog Devices' temperature sensor evaluation platform family, engineered to accelerate validation of high-accuracy thermal sensing in harsh-environment applications where remote probe placement is essential.

FAQ

What is the primary function of the EVAL-ADT7420FBZ?

The EVAL-ADT7420FBZ is a dedicated flex board that hosts the ADT7420UPCZ temperature sensor and enables remote, high-temperature thermal measurements. It connects to the EVAL-ADT7x20EBZ main board via insulated high-temp wires and operates exclusively as an I²C slave device - it contains no active logic or power regulation. The EVAL-ADT7420FBZ must be used in conjunction with the main evaluation system or interfaced directly to a user's microcontroller or FPGA.

Does the EVAL-ADT7420FBZ include its own power supply or USB interface?

No - the EVAL-ADT7420FBZ is a passive flex board with no onboard power regulation, USB controller, or firmware. It draws 3.3 V power, ground, SCL, and SDA signals from an external source (e.g., EVAL-ADT7x20EBZ main board or user-designed host). All communication and power delivery occur through its 6-pin wire harness - red (VCC), black (GND), white (SCL), blue (SDA), and two unused pins per the ADT7420FBZ wiring guide.

Can the EVAL-ADT7420FBZ be used independently without the EVAL-ADT7x20EBZ main board?

Yes - the EVAL-ADT7420FBZ can operate as a standalone sensor node when connected to any compatible I²C master (e.g., Arduino, Raspberry Pi, or custom FPGA design) supplying 3.3 V and implementing proper I²C timing. Its onboard 10 kΩ pull-up resistors on SCL and SDA meet standard I²C bus requirements, and the ADT7420UPCZ defaults to 7-bit address 0x48, enabling immediate readout of temperature registers without configuration.

What is the maximum ambient temperature rating for the EVAL-ADT7420FBZ flex board?

The EVAL-ADT7420FBZ is constructed with high-temp flex materials and wire insulation rated for continuous operation from −40 °C to +150 °C - matching the full operating range of the ADT7420UPCZ sensor it carries. This allows direct immersion in oil baths, industrial ovens, and engine bay environments where rigid PCBs would fail mechanically or thermally.

How does the EVAL-ADT7420FBZ differ from the EVAL-ADT7320FBZ?

The EVAL-ADT7420FBZ integrates the ADT7420UPCZ (I²C interface), while the EVAL-ADT7320FBZ hosts the ADT7320UPCZ (SPI interface). Their flex layouts, pinouts, and wiring color codes differ: EVAL-ADT7420FBZ uses white/blue for SCL/SDA, whereas EVAL-ADT7320FBZ uses white/blue/green/yellow for SCLK/DOUT/DIN/CS. Neither board is electrically interchangeable - firmware, driver stack, and host interface logic must match the respective protocol.