Analog Devices Inc. AD9644BCPZRL7-155

Overview

AD9644BCPZRL7-155 from Analog Devices is a dual, 14-bit, 155 MSPS analog-to-digital converter with JESD204A serial output, 1.8 V supply operation, and support for IF sampling up to 250 MHz. It delivers 71.7 dBFS SNR and 92 dBc SFDR at 70 MHz input, targeting high-performance communications receivers requiring wideband digitization and low-power density.

For engineers reviewing the AD9644BCPZRL7-155 datasheet, AD9644BCPZRL7-155 pinout, AD9644BCPZRL7-155 application, or AD9644BCPZRL7-155 equivalent, this page provides verified specifications, validated pin functions, confirmed dual-channel timing architecture, and real-world deployment context for diversity radio, LTE/W-CDMA baseband, and software-defined radio systems.

Technical Context

The AD9644BCPZRL7-155 implements two independent pipelined ADC cores with integrated error correction logic, each featuring differential sample-and-hold amplifiers and programmable input range (1.4–2.1 V_p-p). Its on-chip PLL multiplies the input clock to generate the JESD204A data-rate clock, enabling single-clock system synchronization.

Dual CML serial outputs support either one shared 3.2 Gbps link or two independent 1.6 Gbps links per channel, with dedicated DSYNC inputs for deterministic channel alignment. The device uses a 48-lead 7 mm × 7 mm LFCSP package with exposed thermal pad tied to AGND, and operates across −40°C to +85°C.

Key Specifications

Pinout & Package

The AD9644BCPZRL7-155 is housed in a 48-lead, 7 mm × 7 mm LFCSP package (CP-48-9) with an exposed thermal pad that must be soldered to AGND for proper thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9643BCPZ-155 and ADS4249IRGCT, the AD9644BCPZRL7-155 uniquely integrates dual 14-bit ADCs with on-chip PLL, JESD204A deterministic latency, and matched channel performance-making it optimal for space-constrained, synchronized I/Q or diversity receiver designs.

Availability

AD9644BCPZRL7-155 is available at Aetrix Electronics and suitable for communications infrastructure, medical ultrasound, and defense SDR applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD9644BCPZRL7-155 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, serving precision instrumentation, industrial automation, and communications markets since 1965.

The AD9644 product line targets high-speed data acquisition in wireless infrastructure and instrumentation, emphasizing JESD204A integration, low power per MSPS, and robust RF performance up to 250 MHz input frequency.

FAQ

What is the maximum analog input frequency supported by the AD9644BCPZRL7-155?

The AD9644BCPZRL7-155 supports a usable full-scale analog input bandwidth of 250 MHz, as specified in the datasheet's "Analog Input Bandwidth" section. This enables direct undersampling of IF signals in GSM, W-CDMA, and LTE systems without requiring external anti-alias filtering. Performance metrics such as SNR and SFDR remain validated up to 220 MHz at 155 MSPS, with −3 dB bandwidth measured at 780 MHz.

Does the AD9644BCPZRL7-155 require an external clock multiplier for JESD204A operation?

No, the AD9644BCPZRL7-155 does not require an external clock multiplier. It integrates an on-chip PLL that multiplies the input sampling clock to generate the precise JESD204A data-rate clock. This eliminates external clock synthesis components and simplifies system-level timing design while ensuring deterministic latency across both ADC channels.

How is channel synchronization achieved between the two ADCs in the AD9644BCPZRL7-155?

Channel synchronization in the AD9644BCPZRL7-155 is achieved using dedicated DSYNC+A/DSYNC−A and DSYNC+B/DSYNC−B inputs per channel, combined with the JESD204A deterministic latency feature. When aligned with the same SYNC pulse and properly configured via SPI, both channels achieve sub-cycle timing alignment, enabling coherent I/Q sampling and diversity combining without FPGA-level deskew logic.

What power-saving modes are available on the AD9644BCPZRL7-155, and what are their typical power draws?

The AD9644BCPZRL7-155 offers three power states: active (567 mW at 155 MSPS), standby (168 mW), and deep power-down (27 mW). Standby mode retains register settings and reference bias while disabling conversion; power-down mode shuts down all analog and digital blocks except wake-up circuitry. Both modes are controllable via the PDWN pin or SPI command.

Can the AD9644BCPZRL7-155 interface directly with Xilinx or Intel FPGAs supporting JESD204A?

Yes, the AD9644BCPZRL7-155 is fully compatible with Xilinx and Intel FPGAs that implement the JESD204A standard. Its CML serial outputs meet JESD204A electrical specifications (1.6 Gbps per lane, 100 Ω differential termination), and its deterministic latency, SYNC signaling, and lane alignment features align with FPGA IP core requirements for seamless integration in SDR and baseband processing platforms.