Analog Devices Inc. AD4630-16BBCZ

Overview

AD4630-16 from Analog Devices is a dual-channel, simultaneous-sampling, 16-bit successive approximation register (SAR) analog-to-digital converter with 2 MSPS per channel throughput, ±3 ppm INL over −40°C to +125°C, 97.4 dB SNR, and integrated reference buffer. It serves as a precision front-end digitizer in high-fidelity signal chains for industrial control and scientific instrumentation.

For engineers reviewing the AD4630-16 datasheet, AD4630-16 pinout, AD4630-16 application, or AD4630-16 equivalent, this page delivers verified specifications, validated pin functions, confirmed package mapping to 64-ball CSP_BGA, real-world application context for ATE and seismology, and two technically documented alternative parts with explicit functional and parametric differences.

Technical Context

The AD4630-16 implements an Easy Drive™ architecture that reduces input current to 0.6 µA at DC and enables wide common-mode range (−1/128 × VREF to +129/128 × VREF), allowing direct connection to high-impedance sensors without external buffering. Its Flexi-SPI interface supports 1–4 SDO lanes and echo clock mode to relax timing constraints when using digital isolators.

It integrates internal 1 µF and 2 µF bypass capacitors on VDD_5V, REF, and VDD_1.8V pins, and features a programmable block averaging filter delivering up to 30-bit extended resolution for low-bandwidth signals. The device uses a 75–85 MHz internal oscillator and supports both buffered (REFIN) and unbuffered (REF) reference configurations.

Key Specifications

Pinout & Package

The AD4630-16 is housed in a 7 mm × 7 mm, 64-ball chip scale package ball grid array (CSP_BGA) with internal supply and reference bypass capacitors, reducing PCB footprint and layout sensitivity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD4630-16, AD4032 offers higher resolution but sacrifices dual-channel simultaneity and input drive simplicity, while ADS8924 matches speed but increases layout complexity with external reference support and lacks integrated timing aids like echo clock mode.

Availability

AD4630-16 is available at Aetrix Electronics and suitable for automatic test equipment, digital control loops, and medical instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed performance across industrial temperature ranges.

Supply support for AD4630-16 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.

The AD4630-16 belongs to Analog Devices' precision SAR ADC product line, engineered for applications demanding simultaneous dual-channel sampling, ultra-low distortion, and seamless integration into isolated, low-power, and thermally constrained systems.

FAQ

What is the maximum sampling rate supported by the AD4630-16?

The AD4630-16 supports a maximum throughput rate of 2 MSPS per channel. This is achieved with a complete conversion cycle time of 500 ns and a typical conversion time of 282 ns. The device maintains its full 16-bit performance-including ±3 ppm INL and 97.4 dB SNR-at this rate, making it suitable for high-speed closed-loop control and transient capture applications where the AD4630-16's simultaneous dual-channel capability is essential.

Does the AD4630-16 require external reference bypass capacitors?

No, the AD4630-16 integrates a 2 µF bypass capacitor on the REF pin and 1 µF capacitors on VDD_5V and VDD_1.8V pins. When using the unbuffered reference path (REF pin), no external capacitor is needed. For the buffered path (REFIN), a 2 µF external capacitor is recommended at the reference source to ensure stability, but the AD4630-16 itself provides internal capacitance to reduce system-level component count-confirming the AD4630-16's design for minimal external support circuitry.

Can the AD4630-16 operate with a 4.096 V external reference?

Yes, the AD4630-16 supports an external reference voltage range of 4.096 V to 5 V on either REFIN (buffered mode) or REF (unbuffered mode). At 4.096 V, specifications such as SNR (97.1 dB), SFDR (130 dB), and THD (−130 dB) remain fully characterized and guaranteed. The AD4630-16's reference buffer offset error stays within ±25 µV at 4.096 V, ensuring consistent accuracy across the full specified reference range.

How does the Flexi-SPI interface of the AD4630-16 simplify digital isolation?

The AD4630-16's Flexi-SPI interface includes echo clock mode, where the BUSY/SCKOUT pin outputs a replica of the incoming SCK signal. This eliminates setup/hold timing uncertainty across digital isolators by providing a locally synchronized clock domain on the isolated side. Combined with 1–4 configurable SDO lanes, the AD4630-16 reduces required SCK frequency to 10 MHz at 2 MSPS-significantly easing isolator selection and PCB layout. This capability is explicitly validated in the AD4630-16 datasheet and directly enhances system robustness in noisy industrial environments.

What is the operating temperature range for guaranteed performance of the AD4630-16?

The AD4630-16 guarantees full specification compliance-including ±3 ppm INL, 97.4 dB SNR, and 2 MSPS throughput-from −40°C to +125°C ambient temperature. This extended industrial temperature range is validated across all key parameters in Table 1 of the Rev. B datasheet. The AD4630-16's zero-error drift (±0.05 ppm/°C) and gain-error temperature drift (±0.05 ppm/°C buffered) ensure minimal calibration burden in thermally demanding applications such as downhole instrumentation or automotive powertrain control, where the AD4630-16 delivers consistent precision without derating.