AD9691BCPZ-1250

Overview

The AD9691BCPZ-1250 is a dual-channel, 14-bit analog-to-digital converter (ADC) operating at a maximum sampling rate of 1.25 GSPS. It features an on-chip buffer and sample-and-hold circuit with a multistage differential pipelined architecture. The device supports JESD204B Subclass 1 interfaces with flexible lane configurations up to eight lanes. Each channel includes two integrated digital downconverters (DDCs) comprising a 12-bit NCO and four half-band decimation filters. Key electrical specifications include a full-scale input voltage of 1.58 V p-p, a usable analog bandwidth of 1.5 GHz, and power consumption of 1.9 W per channel. It operates within a temperature range of −40°C to +85°C.

Feature Summary

• Dual-channel 14-bit ADC cores with integrated output error correction logic for high linearity.
• On-chip buffered inputs with programmable termination impedance to simplify filter design.
• Integrated digital downconverters with frequency translation and cascaded decimation filters.
• Programmable fast overrange detection with low-latency threshold indicators for AGC implementation.

Applications

• Wideband receivers and digital predistortion in communications systems
• Spectrum analyzers and network analyzers in instrumentation
• DOCSIS 3.x CMTS upstream receive paths
• High-speed data acquisition systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure that the supply voltages match the required AVDD and DVDD levels for the target application. Confirm interface compatibility with the receiving logic device before procurement.

Selection Notes

Select this component when high dynamic range and wide bandwidth are required for direct RF or IF sampling. Evaluate the DDC configuration to determine the appropriate JESD204B lane count and baud rate for the system. Consider the thermal characteristics and PCB layout requirements due to the high power dissipation per channel.

Part Context

The AD9691 belongs to Analog Devices' family of high-speed JESD204B ADCs designed for demanding signal processing applications. It shares architectural similarities with other devices in the series but offers specific performance metrics tailored for wideband capture. The dual-channel design allows for coherent sampling of multiple signals within a single package.

Replacement Considerations

Check for pin-compatible alternatives within the same product family that may offer different sampling rates or channel counts. Verify that any substitute device maintains compatible JESD204B link parameters and power supply requirements.