Analog Devices Inc. AD9225ARZRL

Overview

AD9225ARZRL from Analog Devices is a monolithic 12-bit, 25 MSPS analog-to-digital converter with integrated sample-and-hold amplifier and programmable voltage reference. It operates on a single 5 V supply, delivers 71 dB SNR and –85 dB SFDR at 2.5 MHz input, guarantees no missing codes, and supports differential or single-ended inputs for communications and imaging signal acquisition.

For engineers reviewing the AD9225ARZRL datasheet, AD9225ARZRL pinout, AD9225ARZRL application, or AD9225ARZRL equivalent, key selection considerations include its 25 MSPS throughput, 12-bit accuracy with ±0.4 LSB DNL, straight binary output format, 28-lead SOIC package compatibility, and dual-reference (1 V/2 V) configuration flexibility.

Technical Context

The AD9225ARZRL employs a four-stage differential pipelined architecture with digital error correction logic to achieve 12-bit accuracy at 25 MSPS. Its SHA supports full-scale switching between channels and sampling beyond Nyquist, with aperture jitter of 1 ps rms and acquisition time of 10 ns.

It features separate analog (AVDD/AVSS) and digital (DRVDD/DRVSS) supplies, enabling interoperability with both 3 V and 5 V logic families. The internal reference is selectable via SENSE pin strapping (1 V or 2 V), and external reference operation is supported by disabling the internal amplifier.

Key Specifications

Pinout & Package

AD9225ARZRL is housed in a 28-lead SOIC package (RoHS-compliant, body width 7.5 mm), pin-compatible with AD9220/AD9221/AD9223/AD9224. Pin functions are validated per Analog Devices AD9225 Rev. C datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog-to-digital conversion applications.

Compared with AD9225ARZRL, AD9220ARZ trades resolution and speed for lower cost and power, while ADS8325IPFBT offers higher resolution at drastically reduced throughput and lacks integrated analog front-end functions-making AD9225ARZRL optimal for medium-speed, medium-resolution, self-contained digitization tasks.

Availability

AD9225ARZRL is available at Aetrix Electronics and suitable for medical ultrasound imaging, communications IF sampling, and industrial process monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AD9225ARZRL 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 AD9225ARZRL belongs to Analog Devices' high-speed data converter product line, engineered for applications demanding precision digitization of analog signals in communications, imaging, and industrial test equipment.

FAQ

What is the maximum input frequency supported by the AD9225ARZRL?

The AD9225ARZRL has a full-power bandwidth of 105 MHz and small-signal bandwidth of 105 MHz, allowing it to accurately digitize input signals up to this frequency with specified AC performance. Its aperture jitter of 1 ps rms supports high-frequency sampling fidelity, and the device maintains 70.7 dB SINAD at 2.5 MHz input-performance degrades gradually above 10 MHz but remains usable within system-level anti-aliasing constraints.

Does the AD9225ARZRL require an external reference voltage?

No, the AD9225ARZRL includes an on-board programmable bandgap reference that can be configured for either 1 V or 2 V output via the SENSE pin. An external reference is optional and used only when tighter dc accuracy or lower temperature drift is required. When using the internal reference, decoupling capacitors must be placed on CAPT and CAPB pins per the recommended network in the datasheet.

Is the AD9225ARZRL pin-compatible with other members of the AD922x family?

Yes, the AD9225ARZRL is pin-compatible with AD9220ARZ, AD9221ARZ, AD9223ARZ, and AD9224ARZ in the 28-lead SOIC and SSOP packages. This allows drop-in replacement in existing designs when upgrading resolution or sampling rate, provided system-level timing, power, and thermal margins accommodate the AD9225ARZRL's 25 MSPS operation and 280 mW dissipation.

What logic voltage levels does the AD9225ARZRL support for digital outputs?

The AD9225ARZRL supports both 3 V and 5 V logic families through its independent DRVDD supply pin (2.85 V to 5.25 V). When DRVDD = 5 V, VOH is ≥4.5 V at 50 mA load; when DRVDD = 3 V, VOH is ≥2.80 V at 0.5 mA load. This dual-voltage capability enables direct interfacing with FPGA I/O banks, microcontroller GPIOs, and ASIC data buses without level-shifting circuitry.

How does the out-of-range (OTR) signal function in the AD9225ARZRL?

The OTR signal in the AD9225ARZRL is an active-high indicator that asserts when the analog input exceeds the selected full-scale range (±VREF). It is synchronized with the data outputs and can be used alongside the MSB to determine whether overflow is positive (high) or negative (low). This hardware flag simplifies real-time signal monitoring and enables fast AGC loop response without software polling of output codes.