Analog Devices Inc. AD9645-125EBZ

Overview

AD9645-125EBZ from Analog Devices is a dual-channel, 14-bit, 125 MSPS analog-to-digital converter with serial LVDS output, 1.8 V supply operation, 650 MHz full-power analog bandwidth, and AEC-Q100 qualification for automotive use. It serves as the front-end digitizer in high-speed I/Q demodulation systems requiring precise wideband signal capture.

For engineers reviewing the AD9645-125EBZ datasheet, AD9645-125EBZ pinout, AD9645-125EBZ application, or AD9645-125EBZ equivalent, this evaluation board enables rapid validation of dual-channel ADC performance in LTE/W-CDMA receivers, portable ultrasound front-ends, and radar LIDAR signal chains under real-world clock jitter and analog input conditions.

Technical Context

The AD9645-125EBZ implements a multistage pipelined ADC architecture with 16-clock-cycle pipeline latency and on-chip sample-and-hold. It supports both ANSI-644 LVDS and low-power reduced-range LVDS output modes, with programmable output clock/data alignment and resolution (12/14/16-bit).

It features dual independent analog input channels (VINA±/VINB±), differential clock inputs (CLK±), SPI-configurable registers (0x00–0xFF, 0x100–0x102), and hardware-selectable power-down via SDIO/PDWN. The board provides access to all critical signals including DCO±, FCO±, D0A±/D1A±, D0B±/D1B±, and VREF/VCM/RBIAS.

Key Specifications

Availability

AD9645-125EBZ is available at Aetrix Electronics and suitable for high-speed communications test equipment, portable ultrasound systems, automotive radar signal acquisition, and LTE/W-CDMA diversity receiver development requiring stable component supply and fast evaluation turnaround.

Supply support for AD9645-125EBZ 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 precision instrumentation, communications, and industrial markets since 1965.

The AD9645 product line delivers dual-channel, high-speed ADCs optimized for space-constrained, low-power applications including smart antenna systems, battery-powered test gear, and AEC-Q100-compliant automotive sensing platforms.

FAQ

What is the AD9645-125EBZ used for?

The AD9645-125EBZ is an evaluation board for the AD9645-125 dual 14-bit 125 MSPS ADC. It enables system-level validation of dynamic performance (SNR, SFDR), timing alignment, LVDS output integrity, and SPI configuration in real hardware environments. Engineers use it to verify signal chain behavior before committing to custom PCB design for communications, medical imaging, or radar applications.

Does the AD9645-125EBZ support both LVDS output modes?

Yes, the AD9645-125EBZ supports both ANSI-644 LVDS (345 mV typical VOD) and low-power reduced-range LVDS (200 mV typical VOD) via SPI register 0x14 (Output Mode). The board routes all LVDS pairs (D0A±/D1A±, D0B±/D1B±, DCO±, FCO±) to SMA connectors and includes termination options to match either standard.

Can the AD9645-125EBZ operate across the full automotive temperature range?

Yes - the AD9645-125EBZ hosts the AD9645-125 W-grade device, which is AEC-Q100 qualified and specified from −40°C to +105°C. The evaluation board uses automotive-grade passive components and thermal design practices to maintain signal integrity and power stability across this range during lab validation.

How is clocking implemented on the AD9645-125EBZ?

The AD9645-125EBZ accepts differential clock inputs (CLK±) via SMA connector and supports LVPECL, LVDS, or 1.8 V CMOS logic levels. It includes on-board clock conditioning circuitry and allows clock division (via register 0x100) to generate lower-frequency sampling clocks from high-frequency sources, enabling flexible test setup with arbitrary waveform generators or frequency synthesizers.

What SPI interface features does the AD9645-125EBZ expose?

The AD9645-125EBZ provides full SPI access to all AD9645-125 registers via header pins (CSB, SCLK/DFS, SDIO/PDWN), supporting read/write operations per JESD204B-style timing (tDS ≥2 ns, tDH ≥2 ns). Key configurable functions include output resolution (12/14/16-bit), data format (twos complement/offset binary), clock/data phase alignment, and built-in test pattern generation - all accessible through the board's firmware interface or direct register writes.