Analog Devices Inc. EVAL-AD7694SDZ

Overview

EVAL-AD7694SDZ from Analog Devices is an evaluation board designed specifically for the AD7694 - a 16-bit, 100 kSPS PulSAR® successive approximation register (SAR) analog-to-digital converter in an 8-lead MSOP package. It provides full signal conditioning, on-board 5.0 V ADR435 reference, ADA4841-1 ADC drivers, and ADG3304 level shifter for 5 V ↔ 3.3 V interface with EVAL-SDP-CB1Z. Used for precision DC/AC performance validation in sensor signal chains and industrial data acquisition.

For engineers reviewing the EVAL-AD7694SDZ datasheet, EVAL-AD7694SDZ pinout, EVAL-AD7694SDZ application, or EVAL-AD7694SDZ equivalent, this page delivers verified hardware configuration details, software operation guidance, power supply architecture, analog input routing options, and SDP interface compatibility - all specific to the 8-lead PulSAR family and AD7694 device integration.

Technical Context

The EVAL-AD7694SDZ implements a single-ended analog input path configured at factory default via SL10-B jumper, supporting AD7694's native 5 V logic and 5 V reference. It uses ADA4841-1 op amps as unity-gain buffers with ±2.5 V/7.5 V rails derived from ADP2301 and ADP7102 regulators.

Communication occurs over SPORT interface from ADSP-BF527 DSP on EVAL-SDP-CB1Z, with ADG3304 level shifting between ADC's 5 V I/O and SDP's 3.3 V logic. Power is supplied via 9 V wall adapter or bench supply through screw terminals J2/J3, enabling flexible lab testing without external power rail generation.

Key Specifications

Availability

EVAL-AD7694SDZ is available at Aetrix Electronics and suitable for precision sensor interface validation, industrial process monitoring, and portable instrumentation development requiring stable component supply and rapid ADC characterization.

Supply support for EVAL-AD7694SDZ 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 Wilmington, MA.

This evaluation board belongs to Analog Devices' PulSAR® ADC evaluation platform family, engineered to accelerate design-in of precision SAR ADCs in measurement, control, and data acquisition systems where resolution, linearity, and low power are critical.

FAQ

What is the primary function of the EVAL-AD7694SDZ?

The EVAL-AD7694SDZ is a dedicated evaluation board for the AD7694 16-bit SAR ADC. It enables full performance characterization - including SNR, THD, INL, DNL, and FFT analysis - using integrated signal conditioning, on-board reference, and PC-based software. It is not a standalone ADC but a test platform that interfaces directly with EVAL-SDP-CB1Z for data capture and control.

Which ADC variants does the EVAL-AD7694SDZ support besides the AD7694?

The EVAL-AD7694SDZ is part of the 8-lead PulSAR evaluation platform and explicitly supports AD7683, AD7684, and AD7694 per UG-340 Rev. C. While the same board hardware can be adapted for other 8-lead PulSAR devices, only these three are validated and listed in the official documentation as supported by the 8-lead variant of EVAL-AD7694SDZ.

Does the EVAL-AD7694SDZ require an external SDP board to operate?

Yes - the EVAL-AD7694SDZ requires connection to EVAL-SDP-CB1Z (or compatible SDP controller) via its 120-pin J5 connector to enable communication, power delivery (VSDP), and data streaming. The board lacks onboard USB or direct PC interface; all control and data transfer depend on the SDP interface and its associated drivers and software stack.

How is analog input configured on the EVAL-AD7694SDZ for the AD7694?

The EVAL-AD7694SDZ is factory-configured for single-ended input (SL10 = B) to match AD7694's default mode. SMA connectors J6 and J10 feed into ADA4841-1 unity-gain buffers referenced to VCM (2.5 V). Input range is 0–5 V with 5 V reference; differential operation requires hardware modification and jumper reconfiguration per UG-340 Table 3.

What software tools are provided for the EVAL-AD7694SDZ?

Analog Devices provides the "8 & 10 Lead PulSAR ADCs" Windows application, which supports waveform capture, histogram (DC/AC), FFT analysis (SNR, SINAD, THD, SFDR), and summary reporting. It saves data in .tsv format and operates both online (with SDP connected) and offline (for file replay). Installation requires two steps: main software + separate SDP driver package.