Analog Devices Inc. AD9226ASTZ

Overview

AD9226ASTZ from Analog Devices is a monolithic 12-bit, 65 MSPS analog-to-digital converter with on-chip sample-and-hold amplifier, internal voltage reference, and differential input architecture. It delivers 69 dB SNR at 31 MHz input, 85 dB SFDR, ENOB = 11.1 at 10 MHz, and operates from a single 5 V analog supply with separate 3 V/5 V digital driver supply. It is used in IF undersampling receivers for wireless infrastructure and high-speed data acquisition systems.

For engineers reviewing the AD9226ASTZ datasheet, AD9226ASTZ pinout, AD9226ASTZ application, or AD9226ASTZ equivalent, key selection considerations include its 750 MHz full-power analog bandwidth, clock duty cycle stabilizer, guaranteed no missing codes over –40°C to +85°C, and pin compatibility with AD9220–AD9225 family members.

Technical Context

The AD9226ASTZ employs a 9-stage, 1.5-bit-per-stage pipelined ADC architecture with on-chip correction logic and patented sample-and-hold amplifier. Its SHA supports both differential and single-ended inputs up to 300 MHz while maintaining high AC performance, and features full-power bandwidth of 750 MHz.

It integrates a programmable internal voltage reference (1 V or 2 V output), supports external reference selection, and includes dedicated pins for noise reduction (CAPT/CAPB), common-mode level setting (CM LEVEL), and clock stabilization (MODE1). Output format (straight binary or two's complement) is controlled via MODE2.

Key Specifications

Pinout & Package

AD9226ASTZ is packaged in a 48-lead LQFP (ST-48 package option), RoHS-compliant, with exposed pad for thermal enhancement. Pin pitch is 0.5 mm; body size is 7 mm × 7 mm × 1.4 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9225ASTZ and AD9235BRUZ, the AD9226ASTZ uniquely combines 65 MSPS speed, internal 2 V reference, clock duty cycle stabilization, and full 750 MHz analog bandwidth-making it optimal for fixed-IF receiver designs where signal fidelity and layout simplicity are prioritized over programmability or ultra-low power.

Availability

AD9226ASTZ is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD9226ASTZ 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.

The AD9226 belongs to Analog Devices' high-speed ADC product line, designed specifically for demanding communications and instrumentation applications requiring wide bandwidth, low distortion, and robust DC accuracy.

FAQ

What is the maximum analog input frequency supported by the AD9226ASTZ?

The AD9226ASTZ features a full-power analog bandwidth of 750 MHz, enabling direct sampling of IF signals up to 300 MHz while maintaining specified AC performance. At 31 MHz input, it achieves 69 dB SNR and 85 dB SFDR; performance degrades gradually beyond that, with SNR = 65 dBc at 200 MHz. This makes AD9226ASTZ suitable for undersampling architectures in wireless base stations and radar systems.

Does the AD9226ASTZ require an external reference, or does it have an internal one?

The AD9226ASTZ includes a fully integrated, programmable internal voltage reference that can be configured for either 1 V or 2 V output (±29 mV tolerance at 25°C). External reference operation is also supported via the VREF and SENSE pins. Using the internal reference eliminates the need for external components in most applications, reducing BOM cost and board area-key advantages of the AD9226ASTZ design.

How does the clock duty cycle stabilizer in the AD9226ASTZ improve system design?

The AD9226ASTZ clock duty cycle stabilizer (enabled via MODE1 pin) compensates for non-50% duty cycle clocks, maintaining full AC performance-including 69 dB SNR and 85 dB SFDR-even with highly asymmetric clock waveforms. This eliminates the need for precision clock conditioning circuitry, simplifies clock tree design, and improves timing margin in FPGA- or ASIC-driven systems using the AD9226ASTZ.

Is the AD9226ASTZ pin-compatible with other devices in the AD922x family?

Yes, the AD9226ASTZ is pin-compatible with AD9220, AD9221, AD9223, AD9224, and AD9225 in the same 48-lead LQFP package (ST-48). This allows hardware reuse across different sampling rates and feature sets-e.g., upgrading from AD9225ASTZ (40 MSPS) to AD9226ASTZ (65 MSPS) requires no PCB redesign, only firmware and timing adjustments.

What is the meaning of the OTR (Out-of-Range) output on the AD9226ASTZ?

The OTR pin on the AD9226ASTZ is an active-high indicator that asserts when the analog input exceeds the selected full-scale range (±1 V or ±2 V). Used in conjunction with the MSB, OTR distinguishes between high overflow (MSB = 1, OTR = 1) and low overflow (MSB = 0, OTR = 1), enabling real-time signal clipping detection and automatic gain control in systems using the AD9226ASTZ.