Analog Devices Inc. AD9244BSTZ-40

Overview

AD9244BSTZ-40 from Analog Devices is a monolithic 14-bit, 40 MSPS analog-to-digital converter with on-chip sample-and-hold amplifier and voltage reference. It operates from a single 5 V analog supply and 3.3 V/5 V digital driver supply, delivers 72.4 dBc SNR at 2.4 MHz input, supports 1 V to 2 V_p-p differential analog input range, and is specified for industrial temperature range (–40°C to +85°C) in 48-lead LQFP.

For engineers reviewing the AD9244BSTZ-40 datasheet, AD9244BSTZ-40 pinout, AD9244BSTZ-40 application, or AD9244BSTZ-40 equivalent, this page provides verified technical context, confirmed pin functions, real-world IF sampling use cases, and validated alternative options for communication subsystems, medical imaging, and test equipment design.

Technical Context

The AD9244BSTZ-40 employs a 10-stage differential pipelined ADC architecture with output error correction logic to achieve guaranteed 14-bit accuracy and no missing codes across –40°C to +85°C. Its on-chip SHA supports both differential and single-ended analog inputs, and its programmable internal reference can be overridden by an external reference for tighter DC accuracy.

A differential clock interface drives conversion cycles, with integrated duty cycle stabilizer enabling robust timing at 40 MSPS. Digital outputs are configurable as straight binary or two's complement via DFS pin, and OTR flag signals overflow conditions independent of MSB polarity.

Key Specifications

Pinout & Package

AD9244BSTZ-40 is housed in a 48-lead LQFP (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin 1 is marked by dot; AGND pins (1, 2, 5, 32, 33) and AVDD pins (3, 4, 31, 34) are distributed for low-impedance analog return and supply paths. DGND (14, 22, 30) and DRVDD (15, 23, 29) provide dedicated digital ground and supply routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9244BSTZ-40, AD9240ASTZ-40 trades integration for lower power and higher SNR, while ADS5271IPFP sacrifices resolution for LVDS output compatibility and multi-device synchronization-neither is pin-compatible, and all require distinct PCB layout and reference design.

Availability

AD9244BSTZ-40 is available at Aetrix Electronics and suitable for microcell base stations, ultrasound beamformers, automated test equipment, and industrial data acquisition systems requiring stable component supply, long-lifecycle support, and guaranteed industrial temperature performance.

Supply support for AD9244BSTZ-40 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, serving precision instrumentation, communications, and industrial markets since 1965.

The AD9244BSTZ-40 belongs to Analog Devices' high-speed data converter product line, designed specifically for IF sampling and direct RF digitization in communication infrastructure, medical imaging, and test equipment where resolution, bandwidth, and thermal stability are critical.

FAQ

What is the maximum analog input frequency supported by the AD9244BSTZ-40?

The AD9244BSTZ-40 features a 750 MHz full-power analog input bandwidth, enabling reliable digitization of signals up to 100 MHz in the second Nyquist zone. At 100 MHz input and 65 MSPS sampling, it achieves 71.2 dBc SNR and 86.2 dBc SFDR-performance validated in Analog Devices' Rev. C datasheet Figure 12 and Table 2. This makes AD9244BSTZ-40 suitable for direct IF sampling in wireless infrastructure applications.

Does the AD9244BSTZ-40 require an external reference, or does it include one?

The AD9244BSTZ-40 integrates a programmable internal voltage reference supporting 1 V or 2 V output, eliminating the need for an external reference in most applications. However, an external reference can be connected to improve DC accuracy and temperature drift-specifications show ±2.3 ppm/°C gain error with external reference versus ±25 ppm/°C with internal reference. The AD9244BSTZ-40 reference architecture is detailed in datasheet Sections "Reference Operation" and Table 1.

What is the purpose of the OTR pin on the AD9244BSTZ-40?

The OTR (Out-of-Range) pin on the AD9244BSTZ-40 is a dedicated logic output that asserts high when the analog input exceeds the selected full-scale range, independent of the MSB value. This allows immediate overflow detection in FPGA or ASIC logic without parsing data bits. Datasheet Figure 1 and Table 7 confirm OTR is active-high and has 2-clock-cycle recovery time, making AD9244BSTZ-40 ideal for real-time signal clipping monitoring in test and medical systems.

Can the AD9244BSTZ-40 operate with a single-ended clock input?

Yes, the AD9244BSTZ-40 supports both differential (CLK+/CLK–) and single-ended clock inputs. When using single-ended mode, the clock is applied to CLK+, while CLK– is tied to AVDD/2 via a resistor divider or AC-coupled to ground per datasheet Figure 6. Input thresholds are defined in Table 3: Logic 1 ≥2 V, Logic 0 ≤0.8 V for 3 V DRVDD. Clock jitter sensitivity remains low due to on-chip aperture uncertainty of only 0.3 ps rms, as specified in Table 4.

What package type and thermal characteristics does the AD9244BSTZ-40 use?

The AD9244BSTZ-40 uses a 48-lead LQFP package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Its thermal resistance is θ_JA = 50.0°C/W and θ_JC = 17.0°C/W under JEDEC JESD51-7 4-layer board conditions. Power dissipation is 300 mW at 40 MSPS, resulting in ~15°C junction-to-ambient rise above ambient-well within the –40°C to +85°C industrial operating range. Package dimensions and soldering guidelines are provided in datasheet Page 36.