Analog Devices Inc. EVAL-AD7190EBZ

Overview

EVAL-AD7190EBZ from Analog Devices is an evaluation board designed to characterize and prototype with the AD7190 4.8 kHz ultralow noise 24-bit sigma-delta ADC. It supports standalone battery-powered operation with LCD display, USB-connected PC software control, and flexible analog/digital interface options including external microcontroller integration and load cell interfacing. The board integrates dual SMB analog input connectors (AIN1/AIN2), dual reference inputs (REF2+/REF2−), and MCLK clock input.

For engineers reviewing the EVAL-AD7190EBZ datasheet, EVAL-AD7190EBZ pinout, EVAL-AD7190EBZ application, or EVAL-AD7190EBZ equivalent, this board enables rapid validation of high-precision low-frequency measurement systems-especially weigh scale designs, sensor front ends, and low-noise data acquisition where resolution, rms noise, and reference stability are critical selection criteria.

Technical Context

The EVAL-AD7190EBZ implements a complete hardware testbed for the AD7190 ADC, featuring on-board ADP3303-5 (5 V) and ADP3303-3.3 (3.3 V) precision LDOs, ADR421 2.5 V reference, CY7C68013A USB microcontroller, and 2×16-character LCD. Power options include USB 5 V, 9 V battery, or external 9 V DC via J31 or screw terminal J10.

It provides three operational modes: standalone weigh-scale demo (using J4 header for 4-/6-wire load cells), PC-controlled real-time analysis via LabVIEW-based software, and digital interface reuse-where Header J2 isolates the AD7190 for connection to user-designed microcontroller platforms while retaining full analog signal conditioning capability.

Key Specifications

Availability

EVAL-AD7190EBZ is available at Aetrix Electronics and suitable for precision sensor evaluation, industrial weigh-scale prototyping, and low-noise data acquisition system development requiring stable component supply and full technical support.

Supply support for EVAL-AD7190EBZ 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The EVAL-AD7190EBZ belongs to Analog Devices' precision data acquisition evaluation platform family, engineered specifically to accelerate design-in of ultralow-noise, high-resolution sigma-delta ADCs in demanding measurement applications.

FAQ

What is the primary function of the EVAL-AD7190EBZ?

The EVAL-AD7190EBZ is an evaluation board for the AD7190 24-bit sigma-delta ADC. Its primary function is to enable hardware characterization, firmware development, and system-level validation of low-frequency, high-precision analog measurements. It supports both standalone operation (e.g., weigh-scale demo using J4 load cell header) and PC-based configuration and analysis via USB-connected LabVIEW software. The board includes all necessary power regulation, reference circuitry, and interface options to fully exercise the AD7190's features without requiring additional external components. EVAL-AD7190EBZ provides immediate access to key ADC parameters including gain, ODR, filter settings, and channel selection through its intuitive software interface.

Does the EVAL-AD7190EBZ support external microcontroller integration?

Yes, the EVAL-AD7190EBZ supports external microcontroller integration via Header J2. When links on J2 are removed, the AD7190 is electrically isolated from the onboard CY7C68013A USB controller, exposing all SPI signals (SCLK, DIN, DOUT, CS), power, ground, and GPIO pins for direct connection to a user's host processor. This allows the board to serve as a ready-made analog front end-retaining its precision reference, filtering, and sensor interface capabilities-while enabling custom firmware development on the user's target platform. EVAL-AD7190EBZ thus bridges evaluation and production design phases without PCB redesign.

Can the EVAL-AD7190EBZ be used without a PC?

Yes, the EVAL-AD7190EBZ operates fully in standalone mode using a 9 V battery or external 9 V DC supply. In this configuration, it runs preloaded weigh-scale firmware that reads conversions from the AD7190, applies gain scaling (128×), and displays weight results on the onboard 2×16 LCD. Four tactile buttons allow offset/full-scale calibration, unit selection (grams/kg), and contrast adjustment. No PC, drivers, or software installation are required. EVAL-AD7190EBZ's self-contained operation makes it ideal for field demonstrations, educational labs, or rapid sensor interface verification independent of host systems.

What reference options does the EVAL-AD7190EBZ provide for the AD7190?

The EVAL-AD7190EBZ provides two reference options for the AD7190: an onboard ADR421 2.5 V XFET reference (used by default in standalone mode) and dual SMB connectors (REF2+ and REF2−) for applying an external reference voltage. Header J3 links configure whether the ADR421 or external source drives REFIN2(±). The board also supports ratiometric operation using AVDD as reference during noise testing. All reference paths are electrically isolated and configurable via jumper positions, allowing precise evaluation of reference sensitivity, drift, and noise contribution-critical for achieving <1 μV rms noise performance specified for the AD7190. EVAL-AD7190EBZ ensures accurate reference routing per AD7190's dual-reference architecture.

How does the EVAL-AD7190EBZ assist in noise performance validation?

The EVAL-AD7190EBZ includes dedicated hardware and software tools for noise validation: Header J3 enables resistor-network shorting of AIN1/AIN2 to AVDD/2 for zero-input noise testing, and the included PC software features a "Low Noise Quick Test" mode that automatically configures the AD7190 (gain = 128, ODR = 4.7 Hz), captures 100 samples, and computes rms noise, peak-to-peak noise, and effective resolution. Results are displayed in real time with waveform plots and statistical summaries. EVAL-AD7190EBZ thus delivers traceable, repeatable noise characterization aligned with AD7190's datasheet test conditions-eliminating setup ambiguity and accelerating design confidence for high-fidelity measurement applications.