Analog Devices Inc. EVAL-AD7770FMCZ

Overview

EVAL-AD7770FMCZ from Analog Devices is an evaluation board designed to accelerate development with the AD7770 8-channel, 24-bit simultaneous sampling Σ-Δ ADC. It provides full access to all analog inputs (single-ended or true differential), programmable gain amplifiers (1×–8×), SPI control interface, and dual power modes (high-resolution/low-power). The board supports coherent sampling via sample rate converter (SRC) and enables system-level validation of protection relay and industrial process control signal chains.

For engineers reviewing the EVAL-AD7770FMCZ datasheet, EVAL-AD7770FMCZ pinout, EVAL-AD7770FMCZ application, or EVAL-AD7770FMCZ equivalent, this page delivers verified hardware configuration details, FMC-compliant interface mapping, supported ADC operating modes (32 kSPS high-res / 8 kSPS low-power), real-world timing constraints (DCLKx/SPI/START/SYNC_IN), and traceable sourcing for production-grade evaluation.

Technical Context

The EVAL-AD7770FMCZ implements a fully populated AD7770 in a 64-lead LFCSP package, interfaced via a high-speed FMC (FPGA Mezzanine Card) connector compliant with ANSI/VITA 57.1. It routes all eight analog input pairs (AIN0± to AIN7±), reference pins (REFx±), digital I/O (DCLKx, DOUTx, DRDY, START, SYNC_IN/OUT), and SPI signals (SCLK, SDI, SDO, CS) to the FMC LPC connector with impedance-controlled traces and matched-length routing for simultaneous sampling integrity.

Power delivery includes independent AVDD1x/AVSSx (±1.65 V or 3.3 V), AVDD2x, AVDD4, and IOVDD (1.8–3.6 V) rails with onboard LDOs and decoupling optimized per AD7770 specification. The board integrates the internal 2.5 V reference and supports external reference injection, while GPIOs (GPIO0–GPIO2) are routed for SRC update synchronization and diagnostic control.

Key Specifications

Availability

EVAL-AD7770FMCZ is available at Aetrix Electronics and suitable for industrial process control, protection relay development, and general-purpose data acquisition requiring stable component supply, full-spectrum ADC characterization, and FMC-based rapid prototyping.

Supply support for EVAL-AD7770FMCZ 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, serving industrial, automotive, communications, and healthcare markets since 1965.

The EVAL-AD7770FMCZ belongs to Analog Devices' precision data acquisition evaluation platform family, engineered specifically to de-risk adoption of high-channel-count, simultaneous-sampling Σ-Δ ADCs in safety-critical and metrology-grade applications.

FAQ

What is the primary function of the EVAL-AD7770FMCZ?

The EVAL-AD7770FMCZ is an FPGA Mezzanine Card (FMC)-compliant evaluation platform for the AD7770 8-channel, 24-bit simultaneous sampling ADC. It enables hardware validation, firmware development, and system-level testing of the AD7770's full feature set-including programmable gain, SRC-based coherent sampling, dual power modes, and integrated SAR diagnostics-without custom PCB design. The EVAL-AD7770FMCZ provides direct access to all critical signals and power domains defined in the AD7770 datasheet.

Does the EVAL-AD7770FMCZ support both single-ended and differential analog inputs?

Yes, the EVAL-AD7770FMCZ fully supports both configurations as implemented by the underlying AD7770 IC. All eight analog input channels (AIN0± through AIN7±) are routed to SMA connectors or test points with configurable termination, allowing users to apply true differential, pseudo-differential, or single-ended signals per channel. Input ranges scale dynamically with PGA gain (1×–8×) and reference selection, matching AD7770's specified ±VREF/PGAGAIN (differential) or 0–VREF/PGAGAIN (single-ended) operation.

Can the EVAL-AD7770FMCZ operate in both high-resolution and low-power modes of the AD7770?

Yes, the EVAL-AD7770FMCZ supports both operational modes defined in the AD7770 datasheet. It delivers 32 kSPS output data rate with 103 dB dynamic range in high-resolution mode (14.6 mW/channel), and 8 kSPS with 103 dB dynamic range in low-power mode (4.75 mW/channel). Power rail sequencing, clock source selection (MCLK = 8.192 MHz or 4.096 MHz), and register configuration via SPI are all accessible and validated on the EVAL-AD7770FMCZ.

How is synchronization handled on the EVAL-AD7770FMCZ for multi-board or multi-ADC systems?

The EVAL-AD7770FMCZ exposes the AD7770's dedicated synchronization infrastructure: START, SYNC_IN, and SYNC_OUT pins are routed to the FMC LPC connector and onboard headers. This allows precise deterministic alignment of sampling instants across multiple EVAL-AD7770FMCZ boards or with other synchronized ADCs. Timing parameters-including tINIT_SYNC_IN (145 µs), SYNC_IN setup/hold, and SYNC_OUT delay-are maintained per AD7770 Rev. F specifications.

Is the internal 2.5 V reference used by default on the EVAL-AD7770FMCZ?

Yes, the EVAL-AD7770FMCZ powers the AD7770 with its internal 2.5 V reference enabled by default, meeting the ±10 ppm/°C temperature coefficient and 6.8 µV p-p noise (0.1–10 Hz) specified in the AD7770 datasheet. REFx± pins remain accessible via test points and FMC pins, permitting seamless transition to external reference sources without hardware modification-preserving full compliance with AD7770's 1 V to 3.6 V external reference range.