Analog Devices Inc. AD9224ARSZ

Overview

AD9224ARSZ from Analog Devices is a monolithic 12-bit, 40 MSPS analog-to-digital converter with integrated sample-and-hold amplifier and programmable voltage reference. It delivers 68.3 dB SNR, 81 dB SFDR, ±0.33 LSB typical DNL, and operates from a single +5 V analog supply with separate 3 V/5 V digital driver supply. It is used in high-speed communications receivers and medical ultrasound front-ends.

For engineers reviewing the AD9224ARSZ datasheet, AD9224ARSZ pinout, AD9224ARSZ application, or AD9224ARSZ equivalent, key selection criteria include guaranteed no missing codes over temperature, differential input flexibility (±1 V to ±2 V full-scale), 3-clock-cycle pipeline latency, and SSOP-28 package compatibility with AD9220/AD9221/AD9223/AD9225.

Technical Context

The AD9224ARSZ employs a four-stage differential pipelined architecture with redundant bits and digital error correction logic to achieve 12-bit accuracy at 40 MSPS. Its SHA supports both differential and single-ended inputs with user-selectable common-mode level via VINA/VINB and SENSE-controlled internal reference.

Internal timing uses both clock edges: sampling occurs on the rising edge while the SHA tracks during the low phase. The output buffers drive straight-binary data compatible with 3 V or 5 V logic families, and the OTR signal flags overflow conditions independent of MSB polarity.

Key Specifications

Pinout & Package

AD9224ARSZ is housed in a 28-lead Shrink Small Outline Package (SSOP) with exposed pad (RS-28 package option), optimized for thermal dissipation and board-space efficiency in high-density signal chain layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit, 40 MSPS analog-to-digital conversion applications.

Compared with AD9224ARSZ, AD9225ARSZ offers higher speed at modest SNR trade-off and identical integration, while ADS8325IPFBT serves entirely different low-speed, high-accuracy use cases-neither is pin-compatible, but AD9225ARSZ enables seamless upgrade within same PCB layout.

Availability

AD9224ARSZ is available at Aetrix Electronics and suitable for communications infrastructure, medical ultrasound systems, and industrial imaging equipment requiring stable component supply and long-term production continuity.

Supply support for AD9224ARSZ 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 AD9224ARSZ belongs to Analog Devices' high-speed data converter product line, designed specifically for demanding signal acquisition in communications, imaging, and instrumentation where resolution, speed, and low power must coexist.

FAQ

What is the maximum recommended clock jitter for optimal SNR performance of the AD9224ARSZ?

The AD9224ARSZ specifies 4 ps rms aperture jitter. To maintain its 68.3 dB SNR at 2.5 MHz input, total clock jitter-including source, distribution, and PCB-induced components-must remain ≤2.5 ps rms. Exceeding this degrades effective resolution; for example, 10 ps rms jitter reduces SNR to ~62 dB. System-level jitter budgeting must allocate margin for all contributors, not just the clock generator.

Can the AD9224ARSZ operate with a 2.5 V analog supply instead of the specified +5 V?

No. The AD9224ARSZ requires AVDD = +4.75 V to +5.25 V per absolute maximum ratings and DC specifications. Operation below 4.75 V violates the AVDD operating range, risks incomplete internal biasing, and invalidates all published AC/DC specs-including guaranteed no missing codes and 68.3 dB SNR. The device is not rated for 2.5 V analog operation.

How does the SENSE pin configuration affect the full-scale input range of the AD9224ARSZ?

When SENSE is tied to AVSS, the AD9224ARSZ configures its internal reference to 2.0 V, yielding a 4 V p-p full-scale input range (VINA – VINB = ±2 V). When SENSE is shorted to VREF, it selects 1.0 V internal reference, resulting in 2 V p-p full-scale range (±1 V). This directly scales the analog input span without changing external drive circuitry.

Is the AD9224ARSZ compatible with LVDS or CMOS digital interfaces?

The AD9224ARSZ provides CMOS-compatible digital outputs only-its BIT 1–BIT 12 and OTR pins drive straight-binary levels referenced to DRVDD (2.85–5.25 V). It lacks LVDS drivers or differential output pairs. For LVDS interfacing, an external translator (e.g., SN65LVDS1) is required; CMOS logic families (3 V or 5 V) connect directly with proper DRVDD selection.

What decoupling is required on CAPT and CAPB pins for stable AD9224ARSZ reference operation?

The AD9224ARSZ requires a dual-capacitor network on each of CAPT and CAPB: a 0.1 µF ceramic capacitor placed as close as possible to the pin, plus a 10 µF bulk capacitor (tantalum or ceramic) located nearby. This combination stabilizes the internal reference amplifiers A1/A2, provides low-impedance AC current sourcing/sinking for the SHA, and suppresses broadband noise that would otherwise degrade SNR and THD.