Analog Devices Inc. AD9288BSTZ-40

Overview

AD9288BSTZ-40 from Analog Devices is a dual 8-bit analog-to-digital converter optimized for low-power, high-speed sampling at 40 MSPS per channel. It integrates on-chip track-and-hold, internal 1.25 V reference, and independent channel operation with 475 MHz analog bandwidth. Used in battery-powered scopemeters and I/Q communications receivers where compact size, single 3.0 V supply, and TTL/CMOS-compatible digital outputs are critical.

For engineers reviewing the AD9288BSTZ-40 datasheet, AD9288BSTZ-40 pinout, AD9288BSTZ-40 application, or AD9288BSTZ-40 equivalent, this page delivers verified specifications, industrial-grade LQFP-48 package details, dual-channel timing behavior, and real-world selection guidance for mixed-signal data acquisition systems.

Technical Context

The AD9288BSTZ-40 employs a pipeline ADC architecture with bit-per-stage conversion, delivering 8-bit resolution across two independent channels. Each channel features differential analog inputs, user-selectable output format (twos complement or offset binary), and configurable standby modes via S1/S2 pins.

It operates from a single 3.0 V supply (2.7–3.6 V), supports 1–40 MSPS encode rates, and provides latched digital outputs with 4-pipeline-stage latency. The internal 1.25 V reference (±130 ppm/°C tempco) enables 1 V_p-p full-scale input range centered at 0.3 × VD, with SNR = 47 dB at 41 MHz input.

Key Specifications

Pinout & Package

AD9288BSTZ-40 is housed in a 48-lead LQFP package (7 mm × 7 mm, 1.4 mm height), rated for industrial temperature range (–40°C to +85°C). Pinout conforms to Analog Devices Rev. C specification.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel ADC applications.

Compared with AD9288BSTZ-80 and AD9288BSTZ-100, the AD9288BSTZ-40 delivers identical functionality and pin compatibility at lower power and cost, making it optimal for 20 MHz bandwidth applications where higher sample rates provide no SNR or ENOB benefit.

Availability

AD9288BSTZ-40 is available at Aetrix Electronics and suitable for battery-powered instruments, hand-held scopemeters, and I/Q communications receivers requiring stable component supply and long-term industrial temperature support.

Supply support for AD9288BSTZ-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, headquartered in Norwood, MA.

The AD9288 belongs to Analog Devices' high-speed data converter product line, designed specifically for cost-sensitive, low-power, dual-channel sampling applications in portable test equipment and communications infrastructure.

FAQ

What is the maximum analog input frequency supported by the AD9288BSTZ-40?

The AD9288BSTZ-40 has a specified analog bandwidth of 475 MHz, meaning it maintains –3 dB response up to that frequency. However, its maximum useful input frequency is constrained by the 40 MSPS sample rate: according to Nyquist, signals above 20 MHz will alias unless filtered. For clean baseband capture, band-limiting to <20 MHz is recommended; for undersampled IF applications, inputs up to 475 MHz may be digitized with proper anti-alias filtering.

Does the AD9288BSTZ-40 require an external reference voltage?

No, the AD9288BSTZ-40 includes an internal 1.25 V reference (REFOUT) that can be directly connected to REFINA and REFINB pins for self-contained operation. External references (1.2–1.3 V) are optional and used only when tighter initial accuracy or different scaling is required. The internal reference exhibits ±130 ppm/°C tempco and supports the full 1 V_p-p input range.

How does the standby mode function on the AD9288BSTZ-40?

The AD9288BSTZ-40 supports two standby configurations via S1/S2 pins: both channels or Channel B only. In standby, digital outputs enter high-impedance state and encode circuitry is disabled, reducing power dissipation to 6 mW per active channel. Recovery time is 15 clock cycles. This mode enables dynamic power scaling in battery-operated systems without resetting the ADC core.

Can the AD9288BSTZ-40 operate with separate clocks for each channel?

Yes, the AD9288BSTZ-40 accepts independent encode clocks on ENCA (Pin 47) and ENCB (Pin 14). When S2 = 0, outputs are timed to their respective clocks. When S2 = 1, Channel B output is skewed by ½ clock cycle to align with Channel A's rising edge - enabling coherent sampling even with asynchronous clocks. This is confirmed in Figure 3 and Figure 4 of the Rev. C datasheet.

What is the significance of the "BSTZ" suffix in AD9288BSTZ-40?

The "BSTZ" suffix denotes the package and environmental rating: "BS" indicates the 48-lead LQFP package (7 mm × 7 mm), "T" specifies tape-and-reel packaging, and "Z" confirms compliance with RoHS Directive 2011/65/EU and Pb-free finish. This matches Analog Devices' official ordering guide and distinguishes it from non-RoHS or alternate-package variants like AD9288BST-40.