Analog Devices Inc. EVAL-AD7690SDZ

Overview

EVAL-AD7690SDZ from Analog Devices is a dedicated evaluation board for the AD7690 - an 18-bit, 100 kSPS PulSAR® successive approximation register (SAR) ADC in a 10-lead MSOP package. It provides full signal chain support including on-board ADR435 5.0 V reference, ADA4841-1 ADC drivers, ±7.5 V/–2.5 V analog supply rails, and SDP interface compatibility for real-time data capture and analysis.

For engineers reviewing the EVAL-AD7690SDZ datasheet, EVAL-AD7690SDZ pinout, EVAL-AD7690SDZ application, or EVAL-AD7690SDZ equivalent, this board serves as a validated hardware platform to characterize dynamic performance (SNR, SINAD, THD, SFDR), evaluate dc accuracy (INL/DNL), validate differential/single-ended input configurations, and verify system-level timing with SPORT-controlled conversion sequencing.

Technical Context

The EVAL-AD7690SDZ implements a complete analog front-end optimized for 18-bit SAR ADC evaluation: dual ADA4841-1 op amps configured as unity-gain buffers provide low-noise, high-impedance input conditioning; the ADR435 reference delivers 5.0 V with 3 ppm/°C drift and 3.8 µV p-p noise (0.1–10 Hz); and the ADSP-BF527 DSP on the connected EVAL-SDP-CB1Z handles serial interface timing via SPORT protocol with programmable SCLK up to 60 MHz.

Power delivery uses ADP7102 (+7.5 V), ADP2301 (–2.5 V), and ADP7104 (+2.5 V/+3.3 V/+5 V) LDOs, all decoupled per device; analog and digital grounds share a single low-impedance plane; SMA inputs J6/J10 support both differential and single-ended signal injection; and solder links (SL1–SL7, SL10) allow configuration for AD7690-specific biasing and reference routing.

Key Specifications

Availability

EVAL-AD7690SDZ is available at Aetrix Electronics and suitable for precision data acquisition, industrial process control, medical instrumentation, and test & measurement applications requiring stable component supply and validated ADC evaluation infrastructure.

Supply support for EVAL-AD7690SDZ 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 (DSP) technologies, headquartered in Norwood, MA, with design and manufacturing operations worldwide.

This evaluation board belongs to Analog Devices' PulSAR® ADC evaluation platform family, designed specifically to accelerate prototyping and characterization of high-resolution SAR converters across 14-/16-/18-bit, 100 kSPS–1.33 MSPS performance tiers.

FAQ

What is the primary function of the EVAL-AD7690SDZ?

The EVAL-AD7690SDZ is a dedicated evaluation board for the AD7690 18-bit SAR ADC. It provides a complete, calibrated signal chain - including reference, driver amplifiers, precision power supplies, and SDP interface - enabling engineers to measure dynamic performance (SNR, SINAD, THD), dc linearity (INL/DNL), and timing behavior without custom hardware. The EVAL-AD7690SDZ supports both differential and single-ended input modes via configurable solder links.

Which ADCs does the EVAL-AD7690SDZ support besides the AD7690?

The EVAL-AD7690SDZ is part of the 10-lead PulSAR evaluation platform and supports multiple 10-lead SAR ADCs including AD7685, AD7686, AD7687, AD7688, AD7691, AD7693, AD7942, AD7946, AD7980, AD7982, AD7983, AD7984, AD7988-5, AD7989-5, AD7915, and AD7916. However, the EVAL-AD7690SDZ board shipped with U1 populated as AD7690 and is factory configured for its 18-bit, 100 kSPS operation and differential input range.

Does the EVAL-AD7690SDZ require an external power supply?

Yes - the EVAL-AD7690SDZ requires a 9 V wall adapter (included in kit) to power its on-board ADP7102, ADP2301, and ADP7104 regulators, which generate +7.5 V, –2.5 V, +2.5 V, +3.3 V, and +5 V rails. Alternatively, it can be powered from an external bench supply via screw terminals J2/J3, but this requires reconfiguring solder links SL1–SL7 to 'B' position per UG-340 Section 4.2.

What software is required to operate the EVAL-AD7690SDZ?

The EVAL-AD7690SDZ uses Analog Devices' Windows-based evaluation software, downloadable from the AD7690 product page. It requires installation of both the 8 & 10 Lead PulSAR ADC software and the EVAL-SDP-CB1Z drivers. The software enables real-time waveform capture, FFT analysis (reporting SNR, SINAD, THD, SFDR), histogram testing (ac/dc), and tsv data export. Standalone mode allows offline analysis of saved files without hardware connection.

How is the EVAL-AD7690SDZ connected to a PC?

The EVAL-AD7690SDZ connects to a PC via the EVAL-SDP-CB1Z system demonstration platform: the two boards mate through a 120-pin connector (J5), and the SDP board connects to the PC using a standard USB A-to-Mini-B cable. No direct USB connection exists between the EVAL-AD7690SDZ and PC - all communication flows through the SDP's ADSP-BF527 processor and SPORT interface, with SCLK frequencies up to 60 MHz supported.