Analog Devices Inc. EVAL-AD4630-16-KTZ

Overview

EVAL-AD4630-16-KTZ from Analog Devices is an evaluation board designed to demonstrate and validate the AD4630-24/AD4632-24 dual-channel, 24-bit, simultaneous-sampling SAR ADCs - supporting up to 2 MSPS per channel with ±0.9 ppm INL, 105.7 dB SNR, and Flexi-SPI interface - in high-precision data acquisition systems for seismology, medical instrumentation, and automatic test equipment.

For engineers reviewing the EVAL-AD4630-16-KTZ datasheet, EVAL-AD4630-16-KTZ pinout, EVAL-AD4630-16-KTZ application, or EVAL-AD4630-16-KTZ equivalent, this board enables rapid characterization of Easy Drive™ analog input settling, programmable block averaging (up to 2¹⁶ decimation), overrange detection, and echo clock mode timing with digital isolators - all while interfacing directly to the AD4630-24's 64-ball CSP_BGA package and integrated reference buffer.

Technical Context

The EVAL-AD4630-16-KTZ provides full hardware access to the AD4630-24/AD4632-24's dual 24-bit SAR core, including independent analog inputs (IN0±, IN1±), buffered reference input (REFIN), unbuffered reference (REF), and seven configurable SDO lanes per channel. It supports all Flexi-SPI modes: 1/2/4-lane SDO, echo clock, host clock, and DDR data transfer - enabling serial clock reduction to 10 MHz at 2 MSPS.

Board-level design incorporates the AD4630-24's internal supply and reference bypass capacitors (1 µF on VDD_5V, 0.2 µF on VIO, 2 µF on REF), low-noise LDOs, precision voltage references, and layout-optimized signal routing to preserve 105.7 dB SNR and −127 dB THD performance across −40°C to +125°C operation.

Key Specifications

Availability

EVAL-AD4630-16-KTZ is available at Aetrix Electronics and suitable for high-precision data acquisition, automated test equipment, and scientific instrumentation requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for EVAL-AD4630-16-KTZ 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, serving industrial, automotive, communications, and healthcare markets since 1965.

The EVAL-AD4630-16-KTZ belongs to Analog Devices' precision data converter evaluation platform family, engineered to accelerate validation of ultra-high-resolution SAR ADCs in noise-sensitive, wide-dynamic-range applications demanding <1 ppm INL and >105 dB SNR.

FAQ

What is the primary function of the EVAL-AD4630-16-KTZ evaluation board?

The EVAL-AD4630-16-KTZ evaluation board is a fully assembled and tested platform designed to evaluate the AD4630-24 and AD4632-24 dual-channel, 24-bit SAR ADCs. It provides direct access to all critical analog and digital signals - including IN0±, IN1±, REFIN, REF, CNV, BUSY/SCKOUT, and seven SDO lanes per channel - enabling engineers to verify timing, noise performance, Easy Drive™ input settling, and Flexi-SPI interface behavior under real-world conditions. The board includes calibrated power supplies and reference circuitry to maintain the ADC's specified ±0.9 ppm INL and 105.7 dB SNR.

Does the EVAL-AD4630-16-KTZ support both AD4630-24 and AD4632-24 devices?

Yes, the EVAL-AD4630-16-KTZ supports both the AD4630-24 (2 MSPS) and AD4632-24 (500 kSPS) variants. The board's hardware is identical for both devices, as they share the same 64-ball CSP_BGA package, pinout, register map, and Flexi-SPI interface architecture. Firmware and configuration settings - such as acquisition phase timing, averaging depth, and clocking mode - are adjusted via software to match the selected device's throughput and timing specifications. No hardware modification is required to switch between the two.

How does the EVAL-AD4630-16-KTZ implement the AD4630-24's Easy Drive™ feature?

The EVAL-AD4630-16-KTZ preserves the AD4630-24's Easy Drive™ analog input architecture by using low-capacitance, impedance-matched signal paths from the SMA connectors to the ADC's IN0± and IN1± pins, minimizing charge kickback and enabling stable acquisition with low-input-current amplifiers. The board's layout avoids stubs and vias near analog inputs, maintains tight ground return paths, and isolates analog and digital grounds - all to ensure the AD4630-24 achieves its specified 0.6 µA input current at 2 MSPS and 132 dB CMRR. On-board precharge buffers and optimized PCB stack-up further reduce settling time requirements.

Can the EVAL-AD4630-16-KTZ be used with digital isolators, and how is timing simplified?

Yes, the EVAL-AD4630-16-KTZ fully supports digital isolation via its echo clock mode - a key feature of the AD4630-24's Flexi-SPI interface. In this mode, the BUSY/SCKOUT pin outputs a clean, jitter-reduced replica of the host's SCK signal, eliminating setup/hold timing violations across the isolator barrier. The board routes SCKOUT directly to isolated level-shifters and provides dedicated isolated power domains for VIO and digital I/O. This allows reliable 10 MHz SCK operation at 2 MSPS without custom timing compensation - verified per AD4630-24 Table 5 timing specs for echo clock mode (tSKEW = ±0.4 ns).

What reference configurations does the EVAL-AD4630-16-KTZ support for the AD4630-24?

The EVAL-AD4630-16-KTZ supports both buffered (REFIN) and unbuffered (REF) reference configurations for the AD4630-24. When using the internal reference buffer, REFIN accepts 4.096 V–5 V with 40 pF input capacitance and ±25 µV offset error; the board provides a precision 5.0 V reference source and 2 µF bypass capacitor on REF (unused in buffered mode). For unbuffered operation, REF is driven externally, and the board's REF net includes the AD4630-24's internal 2 µF capacitor - eliminating need for external bulk capacitance and simplifying compliance with the 4.096 V–5 V reference voltage range requirement.