Analog Devices Inc. AD9070BR

Overview

AD9070BR from Analog Devices is an evaluation board designed to accelerate prototyping and performance validation of the AD9070 10-bit, 100 MSPS ECL analog-to-digital converter in SOIC (R-28) package. It integrates on-board AD780 voltage reference, buffered differential encode path, latched data capture using 10H176 ECL flip-flops, and terminated edge-connector outputs for direct connection to logic analyzers or FPGA development systems.

For engineers reviewing the AD9070BR datasheet, AD9070BR pinout, AD9070BR application, or AD9070BR equivalent, this board enables rapid characterization of dynamic performance (SINAD = 54 dB @ 41 MHz), timing behavior (aperture jitter = 2.5 ps rms), and analog input interface design-including ac-coupled single-ended signal conditioning with –2.5 V dc shift-without custom PCB development.

Technical Context

The AD9070BR evaluation board implements a complete signal chain around the AD9070BR IC: analog input is ac-coupled via BNC J1, dc-shifted by the internal –2.5 V reference (VREF OUT), and applied to AIN/AIN pins; encode clocking supports both single-ended (J2) and differential (J2/J4) ECL drive; digital outputs are latched and buffered through 10H176 and 10H116 ECL components before routing to a 37-pin edge connector.

Board-level features include configurable reference selection (internal AD9070 VREF OUT or external AD780), jumper-selectable encode mode, MSB inversion for straight-binary output conversion, and on-board 50 Ω termination networks (RP11/RP12/RP14) for data lines-enabling direct interfacing with standard ECL logic loads without external termination.

Key Specifications

Availability

AD9070BR is available at Aetrix Electronics and suitable for high-speed data acquisition, radar receiver prototyping, spectrum analyzer development, and communications test equipment requiring stable component supply and validated reference design support.

Supply support for AD9070BR 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 AD9070BR evaluation board belongs to Analog Devices' precision high-speed data converter evaluation platform family, engineered to de-risk system integration of ECL-domain ADCs in defense, instrumentation, and broadband communications applications.

FAQ

What is the primary function of the AD9070BR evaluation board?

The AD9070BR evaluation board is a fully assembled, tested platform for evaluating the AD9070 10-bit, 100 MSPS ECL analog-to-digital converter. It provides all necessary signal conditioning, clock distribution, data latching, and output buffering-enabling immediate measurement of dynamic performance metrics like SINAD, SNR, and harmonic distortion without custom hardware design. The board directly supports the AD9070BR IC's SOIC package and its specified operating conditions.

Does the AD9070BR evaluation board include a voltage reference, and can it be changed?

Yes, the AD9070BR evaluation board supports two reference configurations: the internal –2.5 V bandgap reference of the AD9070BR IC (enabled by shorting E2–E3), or the precision external AD780 reference (enabled by shorting E1–E3). This flexibility allows users to compare baseline performance against a higher-accuracy reference-critical for validating gain error, offset drift, and full-scale linearity in metrology-grade applications involving the AD9070BR.

How is the analog input signal conditioned on the AD9070BR board?

The AD9070BR board accepts a 1 V_p-p, ground-centered ac-coupled analog signal at BNC connector J1. Internally, the signal is dc-shifted by –2.5 V using the AD9070BR's internal reference (or AD780), aligning it with the ADC's nominal input range of ±512 mV_p-p centered at –2.5 V. This configuration ensures optimal dynamic range utilization and matches the AD9070BR's specified common-mode voltage and input offset requirements.

Can the AD9070BR evaluation board operate with differential encode clock inputs?

Yes, the AD9070BR evaluation board supports both single-ended and differential encode clock operation. In differential mode, J2 and J4 accept complementary ECL signals; onboard 10H176 flip-flops buffer and distribute the encoded clock to the AD9070BR's ENCODE and ENCODE pins. The board ships configured for single-ended use (E9–E19 jumpered), but differential operation is enabled by reconfiguring jumpers per the schematic-ensuring low-jitter sampling aligned with the AD9070BR's 2.5 ps aperture uncertainty specification.

What type of digital output interface does the AD9070BR evaluation board provide?

The AD9070BR evaluation board delivers latched, buffered, and terminated digital outputs via a 37-pin edge connector. Data from the AD9070BR (two's complement format) is converted to straight binary by inverting the MSB on-board, then driven differentially through 10H116 receivers. Outputs are terminated with 100 Ω resistors to –2 V, matching standard ECL logic levels-allowing direct connection to logic analyzers, FPGAs, or ASICs without additional level-shifting circuitry.