Analog Devices Inc. AD6655-150EBZ

Overview

AD6655-150EBZ from Analog Devices is an evaluation board for the AD6655-150, a dual-channel 14-bit 150 MSPS IF diversity receiver IC with integrated digital downconverter (DDC), 32-bit NCO, and decimating filters. It supports IF sampling up to 450 MHz, delivers 74.5 dBc SNR at 70 MHz input, and enables real/complex output modes via CMOS or LVDS interfaces - used in multimode baseband receivers for LTE, WCDMA, and TD-SCDMA systems.

For engineers reviewing the AD6655-150EBZ datasheet, AD6655-150EBZ pinout, AD6655-150EBZ application, or AD6655-150EBZ equivalent, this page provides verified functional context, power supply configuration guidance, default jumper settings, analog input drive options, and layout-critical signal integrity notes specific to the AD6655-150EBZ evaluation platform.

Technical Context

The AD6655-150EBZ implements the full signal chain of the AD6655-150 IC: dual 14-bit ADCs digitize differential IF inputs up to 450 MHz, feeding into independent DDC channels each containing a 32-bit NCO, half-band decimator, and fixed-coefficient FIR filter. The board supports both real and complex output routing, with configurable CMOS (1.8 V–3.3 V) or LVDS (1.8 V) data interfaces.

It integrates on-board clock conditioning (duty cycle stabilizer), SPI programming interface (CSB, SCLK/DFS, SDIO/DCS), SYNC input for multi-chip synchronization, and composite signal monitor outputs (FD[0:3]A/B, DCS). Default operation uses internal voltage reference and 1 V_p-p analog input range, with jumper-selectable gain and input coupling.

Key Specifications

Availability

AD6655-150EBZ is available at Aetrix Electronics and suitable for RF receiver development, LTE/WCDMA base station prototyping, and software-defined radio (SDR) system validation requiring stable component supply, traceable evaluation hardware, and documented design reference support.

Supply support for AD6655-150EBZ 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 Norwood, MA.

The AD6655 product line targets cost-sensitive, space-constrained communications infrastructure - delivering integrated IF receiver functionality (ADC + DDC + NCO + filtering) to replace multi-chip analog front-end and digital processing solutions in diversity radio and multimode baseband applications.

FAQ

What is the AD6655-150EBZ used for?

The AD6655-150EBZ is an evaluation board designed exclusively to demonstrate and validate the AD6655-150 dual-channel IF receiver IC. It enables engineers to characterize SNR, SFDR, channel isolation, DDC performance, and signal monitor functionality under real-world RF conditions - supporting rapid development of LTE, WCDMA, TD-SCDMA, and WiMAX receiver designs before committing to custom PCB layouts. The AD6655-150EBZ itself contains no active silicon beyond the AD6655-150 IC and supporting passive/linear components.

Does the AD6655-150EBZ include the AD6655-150 IC?

Yes, the AD6655-150EBZ ships with the AD6655-150 IC pre-mounted in a 64-lead LFCSP package. This is the full-production-grade device rated for −40°C to +85°C operation, not a sample or engineering version. All specifications - including 150 MSPS sampling, 74.5 dBc SNR at 70 MHz, 95 dB channel crosstalk, and integrated DDC - apply directly to the AD6655-150 IC on the AD6655-150EBZ board.

What power supplies are required for the AD6655-150EBZ?

The AD6655-150EBZ requires three regulated supplies: AVDD = 1.8 V (up to 805 mA), DVDD = 1.8 V (up to 320 mA), and DRVDD = 1.8 V or 3.3 V (13–28 mA for CMOS, 57 mA for LVDS). These must be low-noise, well-decoupled sources - the board includes dedicated test points and filtering but does not include onboard DC-DC conversion. Incorrect voltage sequencing or excessive ripple on AVDD/DVDD will degrade SNR and cause ADC metastability.

How is analog input configured on the AD6655-150EBZ?

Analog input on the AD6655-150EBZ is differential and transformer-coupled by default, supporting up to 450 MHz IF signals. Jumper settings control input range (1 V_p-p or 2 V_p-p), coupling (AC or DC), and termination (50 Ω or high-Z). The board accepts single-ended inputs via external balun; input bandwidth is preserved up to 650 MHz per channel. VIN+A/VIN−A and VIN+B/VIN−B are routed with controlled impedance and matched length to maintain channel timing alignment critical for diversity processing.

Can the AD6655-150EBZ operate in LVDS output mode?

Yes, the AD6655-150EBZ supports LVDS output mode via jumper configuration and DRVDD = 1.8 V supply. In this mode, both Port A and Port B deliver 14-bit parallel data as ANSI-compliant LVDS (250–450 mV differential swing, 1.15–1.35 V common-mode). CMOS mode (1.8 V or 3.3 V) is also supported, including interleaved CMOS on Port A for DDR data transfer. Output mode selection is hardware-configured - no register programming is needed to enable LVDS on the AD6655-150EBZ.