Analog Devices Inc. AD9248BCP-65EBZ

Overview

AD9248BCP-65EBZ from Analog Devices is a dual-channel, 14-bit, 65 MSPS analog-to-digital converter (ADC) in a 64-lead LFCSP evaluation board format. It features differential input with 500 MHz bandwidth, SNR of 71.6 dB and SFDR of 80.5 dBc at Nyquist, and operates from a single 3 V supply. It is used in ultrasound equipment and IF-sampling receivers requiring high channel isolation and low power.

For engineers reviewing the AD9248BCP-65EBZ datasheet, AD9248BCP-65EBZ pinout, AD9248BCP-65EBZ application, or AD9248BCP-65EBZ equivalent, this page delivers verified technical context, real-world timing behavior, dual-channel crosstalk immunity (>85 dB), clock duty cycle stabilization, and multiplexed output configuration - all specific to the AD9248BCP-65EBZ evaluation platform.

Technical Context

The AD9248BCP-65EBZ implements two independent pipelined 14-bit ADC cores sharing a common voltage reference architecture, with each channel supporting up to 65 MSPS conversion rate and 7-cycle pipeline latency. Its differential SHA provides 500 MHz 3 dB analog input bandwidth and supports 1 V_p-p to 2 V_p-p input ranges.

Dual clock inputs (CLK_A/CLK_B) control independent sampling cycles, and the integrated duty cycle stabilizer (DCS) maintains performance across wide clock duty cycle variation. Output data is configurable as offset binary or twos complement, with OTR flags and per-channel power-down (PWDN_A/B) and output enable (OEB_A/B) controls.

Key Specifications

Availability

AD9248BCP-65EBZ is available at Aetrix Electronics and suitable for ultrasound imaging systems, IF-sampling receivers, and battery-powered test equipment requiring stable component supply and validated reference design integration.

Supply support for AD9248BCP-65EBZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.

The AD9248 product line delivers dual-channel, high-speed ADCs optimized for communications infrastructure, medical ultrasound, and instrumentation where channel matching, low crosstalk, and flexible reference modes are critical.

FAQ

What is the AD9248BCP-65EBZ and how does it differ from the AD9248-65 IC?

The AD9248BCP-65EBZ is an evaluation board for the AD9248-65 dual 14-bit ADC, not the bare IC. It integrates the AD9248BCP-65 die in a 64-lead LFCSP package on a fully populated PCB with clock conditioning, analog input networks, reference circuitry, and configurable digital outputs. Unlike the IC alone, the EBZ provides immediate signal chain validation and reduces time-to-first-sample for system architects evaluating IF sampling architectures.

Does the AD9248BCP-65EBZ support both independent and shared reference modes?

Yes, the AD9248BCP-65EBZ supports both modes via the SHARED_REF pin (Pin 62). When pulled low, Channels A and B use separate reference paths (REFT_A/REFB_A and REFT_B/REFB_B); when pulled high, they share the same internal reference node. This is implemented on the board with jumper options, enabling verification of gain matching (<±0.01% typical in shared mode) and offset matching performance per the AD9248BCP-65EBZ schematic and layout.

What clocking options does the AD9248BCP-65EBZ provide for dual-channel synchronization?

The AD9248BCP-65EBZ accepts either two independent LVCMOS clocks (via SMA connectors on CLK_A and CLK_B) or a single clock distributed to both channels using on-board fanout buffers. The board includes a clock duty cycle stabilizer (DCS) enable path tied to Pin 19, allowing evaluation of DCS impact on SNR/SFDR under asymmetric clock waveforms - critical for systems using non-50% duty cycle FPGA or ASIC clocks.

Can the AD9248BCP-65EBZ be used for DC-coupled analog inputs?

No - the AD9248BCP-65EBZ is configured for AC-coupled, differential analog inputs only. Its front-end uses 0.1 µF series capacitors on VIN+_A/VIN−_A and VIN+_B/VIN−_B, blocking DC and establishing a 50 Ω matched path to the ADC's internal 500 MHz SHA. DC-coupled operation would require hardware modification to bypass these capacitors and recalibrate reference levels, which is not supported by the default AD9248BCP-65EBZ bill of materials or layout.

How is data output multiplexing implemented on the AD9248BCP-65EBZ?

Data multiplexing on the AD9248BCP-65EBZ is controlled by the MUX_SELECT pin (Pin 61) and enabled via on-board jumpers. When asserted high, the board routes both Channel A and Channel B 14-bit outputs through a single 14-bit bus using internal logic, reducing FPGA pin count. This mode is validated in the AD9248BCP-65EBZ user guide and requires external timing alignment of CLK_A and CLK_B to avoid inter-channel skew in the multiplexed stream.