Analog Devices Inc. AD4632-16BBCZ-RL

Overview

AD4632-16BBCZ-RL from Analog Devices is a dual-channel, simultaneous-sampling, 16-bit successive approximation register (SAR) analog-to-digital converter with 500 kSPS 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 data acquisition front-end in high-accuracy industrial and scientific instrumentation requiring low drift, wide common-mode input range (−1/128 × VREF to +129/128 × VREF), and flexible Flexi-SPI interface.

For engineers reviewing the AD4632-16BBCZ-RL datasheet, AD4632-16BBCZ-RL pinout, AD4632-16BBCZ-RL application, or AD4632-16BBCZ-RL equivalent, key selection criteria include guaranteed 16-bit no-missing-codes performance at 500 kSPS, Easy Drive™ low-input-current architecture (0.6 µA at DC), programmable block averaging up to 2¹⁶ decimation, and 7 mm × 7 mm 64-ball CSP_BGA package with internal supply/reference bypass capacitors.

Technical Context

The AD4632-16BBCZ-RL implements a dual-channel SAR architecture with simultaneous sampling, enabling precise phase-coherent acquisition across two channels. Its Easy Drive™ input stage reduces external AFE complexity by minimizing charge kickback and supporting wide common-mode ranges without saturation.

Digital interface flexibility is provided via Flexi-SPI with 1/2/4 SDO lanes per channel, echo clock mode for digital isolator timing relaxation, and compatibility with 1.2 V–1.8 V logic. The integrated reference buffer accepts 4.096 V–5 V external references and includes internal 2 µF bypass capacitance on REF pin.

Key Specifications

Pinout & Package

AD4632-16BBCZ-RL uses a 7 mm × 7 mm, 64-ball chip-scale package ball grid array (CSP_BGA) with internal 1 µF (VDD_5V), 1 µF (VDD_1.8V), 0.2 µF (VIO), and 2 µF (REF) bypass capacitors - eliminating 5 external capacitors and reducing system footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD4630-16BBCZ-RL, the AD4632-16BBCZ-RL trades speed for 3× lower power at 500 kSPS while retaining identical precision specs and package compatibility; versus ADS8924BRGER, it delivers true dual-channel simultaneity and integrated reference buffering - reducing BOM count and layout complexity in multi-sensor measurement systems.

Availability

AD4632-16BBCZ-RL is available at Aetrix Electronics and suitable for automatic test equipment, digital control loops, medical instrumentation, and seismology applications requiring stable component supply, long-term manufacturability, and guaranteed parametric performance across extended temperature ranges.

Supply support for AD4632-16BBCZ-RL 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, serving industrial, automotive, communications, and healthcare markets since 1965.

The AD463x family was designed specifically for high-accuracy, low-power, dual-channel data acquisition in thermally demanding and space-constrained environments - emphasizing integrated power/decoupling, wide input range, and flexible digital interfacing for seamless system integration.

FAQ

What is the maximum sampling rate supported by the AD4632-16BBCZ-RL?

The AD4632-16BBCZ-RL supports a maximum throughput rate of 500 kSPS per channel in simultaneous sampling mode. This is a fixed specification for this variant - unlike the AD4630-16BBCZ-RL, which operates at 2 MSPS. The 500 kSPS rate is guaranteed across the full operating temperature range (−40°C to +125°C) with all AC and DC specifications met.

Does the AD4632-16BBCZ-RL require external bypass capacitors?

No, the AD4632-16BBCZ-RL integrates critical bypass capacitors internally: 1 µF on VDD_5V, 1 µF on VDD_1.8V, 0.2 µF on VIO, and 2 µF on REF. This eliminates five external capacitors, reduces PCB area, and improves reliability by minimizing solder joint failure points - especially important in high-vibration or thermally cycled applications.

Can the AD4632-16BBCZ-RL operate with a 4.096 V external reference?

Yes, the AD4632-16BBCZ-RL supports 4.096 V to 5 V external references on either REFIN (with internal buffer enabled) or REF (with buffer disabled). When using 4.096 V, the VDD_5V supply must be set to 4.75 V–5.25 V per datasheet Table 1. Performance remains fully specified: SNR = 97.1 dB, SFDR = 130 dB, THD = −130 dB at fIN = 1 kHz.

How does the Flexi-SPI interface of the AD4632-16BBCZ-RL simplify digital isolation?

The AD4632-16BBCZ-RL supports echo clock mode, where the BUSY/SCKOUT pin outputs an inverted copy of the host's SCK signal. This eliminates setup/hold timing constraints across the isolator barrier, allowing use of slower, lower-cost digital isolators without compromising maximum sample rate - a key advantage in isolated motor control or medical safety-critical systems.

Is the AD4632-16BBCZ-RL pin-compatible with the AD4630-16BBCZ-RL?

Yes, the AD4632-16BBCZ-RL and AD4630-16BBCZ-RL share identical 64-ball CSP_BGA packaging, pinout, and footprint. They are functionally compatible at the hardware level - enabling drop-in replacement in existing designs where reduced throughput (500 kSPS vs. 2 MSPS) and lower power consumption are acceptable trade-offs.