Analog Devices Inc. AD9641BCPZ-80

Overview

AD9641BCPZ-80 from Analog Devices is a 14-bit, 80 MSPS analog-to-digital converter with JESD204A serial output, 1.8 V single-supply operation, −148.6 dBFS/Hz input noise at 180 MHz, and integrated duty cycle stabilizer for clock jitter resilience. It serves as a high-performance IF-sampling ADC in multiband wireless receivers.

For engineers reviewing the AD9641BCPZ-80 datasheet, AD9641BCPZ-80 pinout, AD9641BCPZ-80 application, or AD9641BCPZ-80 equivalent, key selection criteria include SNR (73.7 dBFS at 70 MHz), SFDR (94 dBc), JESD204A CML output compliance, 32-lead LFCSP package thermal performance, and programmable internal voltage reference support.

Technical Context

The AD9641BCPZ-80 implements a multistage differential pipelined ADC architecture with integrated error correction logic and supports IF sampling up to 250 MHz. Its on-chip PLL multiplies the input sampling clock to generate the JESD204A data-rate clock, enabling deterministic latency of 23 clock cycles.

Differential analog inputs accept 1.4–2.1 V_p-p ranges with 780 MHz −3 dB bandwidth; the DCS circuit compensates for clock duty-cycle variation, preserving SNR across temperature (−40°C to +85°C) and supply (1.8 V ±0.1 V).

Key Specifications

Pinout & Package

The AD9641BCPZ-80 is housed in a 32-lead, 5 mm × 5 mm LFCSP package with exposed thermal pad soldered to AGND for optimal thermal dissipation (θ_JA = 36°C/W, still air). Pin 1 indicator aligns with top-left corner in top-view orientation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed ADC applications.

Compared with AD9643BCPZ-80, AD9641BCPZ-80 trades decimation capability for lower cost and identical analog specs; versus ADS5463IRGZT, it delivers 85% lower power and JESD204A routing simplicity at the expense of maximum sample rate and bit depth.

Availability

AD9641BCPZ-80 is available at Aetrix Electronics and suitable for communications infrastructure, ultrasound imaging, and software-defined radio applications requiring stable component supply, long-term industrial temperature support (−40°C to +85°C), and JESD204A interoperability.

Supply support for AD9641BCPZ-80 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, headquartered in Norwood, MA, with R&D and manufacturing facilities worldwide.

The AD9641 product line targets high-speed data acquisition in wireless infrastructure and medical imaging, emphasizing JESD204A integration, low power per MSPS, and robust IF sampling performance up to 250 MHz.

FAQ

What is the maximum analog input frequency supported by the AD9641BCPZ-80?

The AD9641BCPZ-80 supports analog input frequencies up to 250 MHz with good performance, as defined by its usable full-scale bandwidth. Its analog input −3 dB bandwidth is 780 MHz, but specifications such as SNR and SFDR are guaranteed only up to 250 MHz. At 180 MHz input, AD9641BCPZ-80 achieves 72.6 dBFS SNR and 91 dBc SFDR under typical conditions, making it suitable for direct IF sampling in LTE and W-CDMA receivers.

Does the AD9641BCPZ-80 require an external voltage reference?

No, the AD9641BCPZ-80 includes a programmable internal voltage reference that eliminates the need for external reference components. This internal reference supports flexible analog input ranges from 1.4 V_p-p to 2.1 V_p-p and can be configured via SPI. The VCM pin outputs a stable 0.9 V common-mode level, further simplifying interface design with external drivers or baluns in AC-coupled configurations.

How does the duty cycle stabilizer (DCS) improve ADC performance in the AD9641BCPZ-80?

The DCS in AD9641BCPZ-80 dynamically corrects for variations in the ADC clock duty cycle, ensuring consistent aperture timing and minimizing jitter-induced SNR degradation. With DCS enabled, AD9641BCPZ-80 maintains 73.7 dBFS SNR at 70 MHz even with asymmetric clock inputs (e.g., 30%/70% duty cycle), whereas disabling DCS reduces SNR by up to 1.5 dB. This feature allows use of less expensive clock sources without compromising dynamic performance.

What is the latency of the AD9641BCPZ-80 and how is it affected by configuration?

The AD9641BCPZ-80 has a fixed pipeline latency of 23 clock cycles from analog input to serialized JESD204A output, independent of SPI configuration or clock divider setting. This deterministic latency enables precise timing alignment in multichip sync applications. Latency remains unchanged whether operating in divide-by-1 or divide-by-8 clock modes, and is verified across temperature (−40°C to +85°C) and supply (1.8 V ±0.1 V) ranges per the datasheet.

Can the AD9641BCPZ-80 interface directly with Xilinx FPGAs supporting JESD204A?

Yes, the AD9641BCPZ-80 is fully compliant with the JESD204A standard and interfaces directly with Xilinx 7-series and UltraScale FPGAs using their native JESD204A IP cores. It supports 1.6 Gbps lane rate, 8b/10b encoding, and deterministic latency; proper setup requires matching SYNC/DSYNC timing (t_SSYNC = 0.3 ns, t_HSYNC = 0.3 ns) and CML termination. Reference designs and IBIS models for AD9641BCPZ-80 are available from Analog Devices.