Analog Devices Inc. AD9258BCPZRL7-105

Overview

AD9258BCPZRL7-105 from Analog Devices is a dual, 14-bit, 105 MSPS analog-to-digital converter designed for high-performance communications receivers. It features differential analog inputs with 650 MHz bandwidth, 1.8 V analog and digital supply operation, SNR of 77.6 dBFS at 70 MHz, and SFDR of 88 dBc at 70 MHz. It supports IF sampling up to 300 MHz and is used in LTE/W-CDMA baseband receivers.

For engineers reviewing the AD9258BCPZRL7-105 datasheet, AD9258BCPZRL7-105 pinout, AD9258BCPZRL7-105 application, or AD9258BCPZRL7-105 equivalent, key selection criteria include dual-channel interleaving capability, on-chip dither for SFDR enhancement, CMOS/LVDS output flexibility, 95 dB channel isolation, and SPI-configurable voltage reference and clock divider settings.

Technical Context

The AD9258BCPZRL7-105 implements a multistage differential pipelined ADC architecture with integrated error correction logic per channel. Each channel includes wide-bandwidth sample-and-hold amplifiers supporting user-selectable input ranges (1–2 V_p-p) and a proprietary differential input structure preserving SNR up to 300 MHz.

It integrates a duty cycle stabilizer for clock jitter tolerance, an integer 1-to-8 programmable clock divider, and serial port interface (SPI) control for configuration of data formatting (offset binary/twos complement/gray), power-down modes, BIST, and reference selection. Channel synchronization is supported via dedicated SYNC input.

Key Specifications

Pinout & Package

The AD9258BCPZRL7-105 is housed in a 64-lead LFCSP package (9 mm × 9 mm × 0.85 mm) with exposed thermal pad soldered to PCB ground plane for optimal thermal performance and analog integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9258BCPZ-125 and AD9268BCPZ-105, the AD9258BCPZRL7-105 delivers optimal balance of 14-bit precision, 650 MHz analog bandwidth, and 670 mW typical power at 105 MSPS-making it the most cost- and thermally-efficient choice for LTE/W-CDMA IF digitization and ultrasound beamforming.

Availability

AD9258BCPZRL7-105 is available at Aetrix Electronics and suitable for communications infrastructure, medical ultrasound, and software-defined radio applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD9258BCPZRL7-105 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 AD9258 product line targets high-speed, low-power, dual-channel ADC applications in wireless infrastructure, instrumentation, and medical imaging-designed to replace discrete ADC + FPGA solutions with integrated, SPI-configurable signal acquisition.

FAQ

What is the maximum analog input frequency supported by the AD9258BCPZRL7-105?

The AD9258BCPZRL7-105 supports analog input frequencies up to 300 MHz, enabled by its 650 MHz analog input bandwidth and proprietary differential input architecture that maintains 77.6 dBFS SNR at 70 MHz. This makes it suitable for intermediate frequency (IF) sampling in LTE and W-CDMA receivers, where second-IF signals commonly reside between 100–200 MHz. Performance degrades gradually above 200 MHz, with SNR dropping to 75.1 dBFS at 200 MHz.

Does the AD9258BCPZRL7-105 support both CMOS and LVDS digital outputs?

Yes, the AD9258BCPZRL7-105 supports configurable 1.8 V CMOS or LVDS digital outputs via SPI register control. In LVDS mode, it delivers ANSI-compliant differential output voltage (290–400 mV) and reduced-swing mode (160–230 mV), with 1.15–1.35 V common-mode offset. CMOS mode provides standard 1.8 V logic levels with 1.75 V high-level output at 0.5 mA load. The DRVDD supply must be set to 1.8 V for either interface.

How does the on-chip dither function improve SFDR in the AD9258BCPZRL7-105?

The on-chip dither in the AD9258BCPZRL7-105 adds controlled low-level noise to the analog input path before quantization, breaking up harmonic correlation and reducing spurious tones. At −23 dBFS input, dither improves SFDR by ≥13 dB-from 89 dBFS (no dither) to 106 dBFS-enabling cleaner reception in presence of strong interferers. This feature is SPI-enabled and consumes negligible additional power, making it ideal for spectrum-sensing and cognitive radio applications.

What is the purpose of the SYNC pin on the AD9258BCPZRL7-105?

The SYNC pin on the AD9258BCPZRL7-105 provides deterministic multi-chip synchronization for phase-aligned sampling across multiple ADCs. When asserted synchronously with the ADC clock, it resets internal pipeline stages to ensure identical latency and phase relationship between devices-critical for phased-array radar, MIMO base stations, and ultrasound beamforming. It operates in slave mode only and requires setup/hold timing of 0.3 ns/0.4 ns relative to CLK+.

Can the AD9258BCPZRL7-105 operate with a single 1.8 V supply?

The AD9258BCPZRL7-105 requires two separate 1.8 V supplies: AVDD for analog circuitry (pins 49,50,53,54,59,60,63,64) and DRVDD for digital output drivers (pins 10,19,28,37). Both must be regulated at 1.8 V ±0.1 V. The exposed thermal pad must be connected to AGND. Using a single shared 1.8 V rail violates separation requirements and degrades SNR/SFDR due to digital switching noise coupling into analog sections.