Analog Devices Inc. AD9446BSVZ-80

Overview

AD9446BSVZ-80 from Analog Devices is a 16-bit, 80 MSPS monolithic pipeline analog-to-digital converter with on-chip track-and-hold, buffered differential analog inputs (2.0–4.0 V_p-p), LVDS/CMOS selectable outputs, and 60 fsec rms aperture jitter. It delivers 82.6 dBFS SNR at 30 MHz input and 89 dBc SFDR under 3.2 V_p-p input at 80 MSPS, targeting high-fidelity baseband IF sampling in MRI receivers and radar systems.

For engineers reviewing the AD9446BSVZ-80 datasheet, AD9446BSVZ-80 pinout, AD9446BSVZ-80 application, or AD9446BSVZ-80 equivalent, this page provides verified specifications including AC performance at 80 MSPS, LVDS/CMOS output mode selection, clock duty cycle stabilization, out-of-range detection, and thermal design guidance for the 100-lead TQFP/EP package.

Technical Context

The AD9446BSVZ-80 implements a 16-bit pipeline ADC architecture with integrated track-and-hold and internal voltage reference (1.6 V mode). It supports dual-supply operation (3.3 V AVDD1, 5.0 V AVDD2) and offers programmable features including data format (offset binary/twos complement), output mode (LVDS/CMOS), and clock duty cycle stabilization to maintain performance across varying input clock duty cycles.

Its analog input structure features high-impedance buffered differential inputs (1 kΩ || 6 pF), while digital outputs provide ANSI-644-compliant LVDS or CMOS levels with configurable drive strength. The device includes OR+ and OR− pins for real-time out-of-range indication and an output clock (DCO+/DCO−) synchronized to sampled data.

Key Specifications

Pinout & Package

The AD9446BSVZ-80 is housed in a Pb-free, 100-lead TQFP/EP (exposed heat sink) package, specified for −40°C to +85°C operation. Thermal resistance θ_JA = 19.8°C/W (heat sink soldered), requiring direct connection of the exposed pad to AGND for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9445BCPZ-80 and ADS5463IPFP, the AD9446BSVZ-80 uniquely balances 16-bit resolution, 80 MSPS throughput, integrated reference, and DCS functionality-making it optimal for medical imaging and radar where quantization noise floor and timing stability are non-negotiable.

Availability

AD9446BSVZ-80 is available at Aetrix Electronics and suitable for MRI receivers, radar signal processing, and communications instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing for Class I medical and defense-grade designs.

Supply support for AD9446BSVZ-80 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, industrial automation, and communications markets since 1965.

The AD9446 product line delivers high-speed, high-resolution ADCs optimized for baseband and IF sampling in demanding applications including medical imaging, radar, and wireless infrastructure-emphasizing SNR, SFDR, and ease of integration.

FAQ

What is the maximum guaranteed sampling rate for the AD9446BSVZ-80?

The AD9446BSVZ-80 is guaranteed to operate at 80 MSPS, as confirmed in Table 4 of the datasheet. This is its designated speed grade, distinct from the AD9446BSVZ-100 (100 MSPS). Performance parameters-including SNR, SFDR, and ENOB-are fully characterized and guaranteed at this rate under specified conditions (e.g., 3.2 V_p-p input, DCS enabled, LVDS mode).

Does the AD9446BSVZ-80 require an external reference voltage?

No, the AD9446BSVZ-80 includes an internal trimmed 1.6 V reference usable for a 3.2 V_p-p differential input range. The SENSE pin selects reference mode: connect to AGND for internal reference, or to AVDD1 for external reference support. External reference is optional-not required-for standard operation.

Can the AD9446BSVZ-80 operate with only a 3.3 V supply?

No. The AD9446BSVZ-80 requires two analog supplies: AVDD1 = 3.3 V (±5%) and AVDD2 = 5.0 V (±5%), plus DRVDD = 3.3 V for digital outputs. Omitting AVDD2 violates Absolute Maximum Ratings and will prevent proper analog core operation, as confirmed in Tables 1 and 5 of the datasheet.

How does the clock duty cycle stabilizer (DCS) function in the AD9446BSVZ-80?

The DCS in the AD9446BSVZ-80 actively corrects input clock duty cycle deviations to maintain consistent sampling aperture timing. Enabled by pulling DCS MODE low (to AGND), it ensures stable SNR and SFDR performance even with clock duty cycles ranging from 40% to 60%, eliminating need for external duty cycle correction circuits.

What is the purpose of the OR+ and OR− pins on the AD9446BSVZ-80?

The OR+ and OR− pins on the AD9446BSVZ-80 provide a differential out-of-range flag indicating when the analog input exceeds the selected full-scale range. This real-time hardware signal allows immediate system response-such as gain adjustment or alarm triggering-without requiring post-processing or firmware intervention.