Analog Devices Inc. AD9244BSTZ-65

Overview

AD9244BSTZ-65 from Analog Devices is a monolithic 14-bit, 65 MSPS analog-to-digital converter with on-chip sample-and-hold amplifier and voltage reference. It delivers 73.4 dBc SNR and 82.5 dBc SFDR at 65 MSPS with 750 MHz analog input bandwidth, operating from a single 5 V analog supply and 3.3 V/5 V digital driver supply for communication IF sampling applications.

For engineers reviewing the AD9244BSTZ-65 datasheet, AD9244BSTZ-65 pinout, AD9244BSTZ-65 application, or AD9244BSTZ-65 equivalent, this page provides verified technical context, real-world timing behavior, confirmed DC/AC specifications, validated LQFP-48 pin mapping, and two field-tested alternative ADCs for high-speed data acquisition systems requiring stable dc accuracy and low jitter.

Technical Context

The AD9244BSTZ-65 implements a 10-stage differential pipelined ADC architecture with output error correction logic to guarantee 14-bit accuracy and no missing codes across –40°C to +85°C. Its internal SHA supports both differential and single-ended analog inputs, while the clock duty cycle stabilizer (DCS) enables robust operation with asymmetric clock waveforms.

It features dual-reference capability-programmable on-chip 2 V/1 V reference or external reference-with dedicated REFT/REFB pins and SENSE control. Digital outputs are configurable as straight binary or twos complement via DFS, and include OTR overflow indication synchronized to pipeline latency of exactly 8 clock cycles.

Key Specifications

Pinout & Package

AD9244BSTZ-65 is housed in a 48-lead LQFP package (7 mm × 7 mm, 0.5 mm pitch) with exposed pad for thermal dissipation. Pin 1 is marked by dot; AGND and DGND are separated for noise isolation; AVDD and DRVDD supplies are independently decoupled.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9244BSTZ-65, AD9226ASTZ-65 trades resolution for pin compatibility and lower cost in legacy designs, while ADS5463IPFP shifts architecture toward serial interface and higher speed at the expense of analog feature integration and thermal footprint.

Availability

AD9244BSTZ-65 is available at Aetrix Electronics and suitable for communication subsystems, medical imaging equipment, and test and measurement instruments requiring stable component supply, long-term lifecycle support, and guaranteed no-missing-codes performance across industrial temperature ranges.

Supply support for AD9244BSTZ-65 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, founded in 1965 and headquartered in Wilmington, MA.

The AD9244 belongs to Analog Devices' high-speed data converter product line, engineered specifically for IF sampling, communications infrastructure, and precision instrumentation where dc accuracy, low jitter, and integrated reference stability are critical.

FAQ

What is the maximum analog input frequency supported by the AD9244BSTZ-65?

The AD9244BSTZ-65 has a specified analog input bandwidth of 750 MHz, enabling direct sampling of RF signals up to that frequency. At 100 MHz input with 65 MSPS sampling, it achieves 71.2 dBc SNR and 86.2 dBc SFDR - confirming usability well beyond the first Nyquist zone. Performance degrades above 200 MHz due to increased THD and reduced ENOB, as shown in Figure 23 of the datasheet.

Does the AD9244BSTZ-65 require an external reference, or does it have an internal one?

The AD9244BSTZ-65 includes a programmable on-chip voltage reference supporting 1 V or 2 V p-p differential full-scale ranges. It can operate with this internal reference (via VREF, REFT, REFB pins) or accept an external reference for tighter dc accuracy and lower temperature drift. The internal reference exhibits ±29 mV output voltage error at 2 V setting and ±25 ppm/°C gain drift.

How many clock cycles of latency does the AD9244BSTZ-65 introduce between analog input and digital output?

The AD9244BSTZ-65 has a fixed pipeline latency of exactly 8 clock cycles, as confirmed in Table 4 (Switching Specifications) and Figure 2 (Input Timing). This deterministic delay applies regardless of input frequency or reference configuration, enabling precise time alignment in FPGA-based digital downconverters and time-of-flight measurement systems.

Can the AD9244BSTZ-65 operate with a single-ended clock input?

Yes, the AD9244BSTZ-65 accepts single-ended clock inputs on CLK+ while holding CLK− at a fixed common-mode voltage (1.6 V), as detailed in Table 3 (Digital Specifications). Differential clock mode is preferred for lowest jitter, but single-ended operation is fully supported with minor SNR degradation - verified in typical performance curves on page 18 of Rev. C datasheet.

What is the purpose of the OTR (out-of-range) pin on the AD9244BSTZ-65?

The OTR pin on the AD9244BSTZ-65 asserts logic high when the analog input exceeds the selected full-scale range (±0.5 V or ±1 V differential), indicating saturation before MSB inversion occurs. Used with the MSB, it distinguishes high-overflow (positive rail) from low-overflow (negative rail), enabling real-time AGC or clipping mitigation in receiver chains without post-processing.