Analog Devices Inc. AD7616BSTZ

Overview

AD7616BSTZ from Analog Devices is a 16-channel, dual-simultaneous-sampling, 16-bit bipolar analog-to-digital converter (ADC) with integrated reference, input clamping, and on-chip antialiasing filtering. It operates from a single 5 V analog supply and supports ±10 V, ±5 V, and ±2.5 V input ranges while delivering 90.5 dB SNR at 1 MSPS per channel pair. It is used in high-accuracy power line monitoring and protective relay systems requiring synchronized acquisition across multiple voltage/current sensors.

For engineers reviewing the AD7616BSTZ datasheet, AD7616BSTZ pinout, AD7616BSTZ application, or AD7616BSTZ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions for LQFP-80 layout, confirmed alternatives for range-matched DAS replacement, and supply assurance for industrial BOM continuity.

Technical Context

The AD7616BSTZ integrates two independent 16-bit successive approximation register (SAR) ADCs with dual simultaneous sampling architecture, enabling true time-aligned conversion of paired channels (e.g., voltage + current per phase). Its first-order analog antialiasing filter provides 39 kHz full-power bandwidth at ±10 V range and 4.4 µs phase delay with <100 ns matching between ADC A and B.

It supports flexible configuration via hardware mode (pin-strapped input ranges and sequencer) or software mode (register-based control), with SPI/QSPI/MICROWIRE/DSP-compatible serial interface or 16-bit parallel interface. Oversampling up to OSR = 4 improves SNR to 93 dB and reduces noise floor without external processing.

Key Specifications

Pinout & Package

AD7616BSTZ is housed in an 80-lead LQFP package (12 mm × 12 mm, 0.5 mm pitch) with separate analog/digital ground planes and dedicated decoupling pins for VCC, VDRIVE, REFCAP, and REFINOUTGND. Thermal resistance θJA = 41°C/W under JEDEC 2S2P board conditions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-simultaneous-sampling DAS applications.

Compared with AD7616BSTZ, AD7606C-16 trades channel count and simultaneity for lower power and simplified layout, while LTC2358-18 offers higher resolution at the cost of increased external component count and reduced ruggedness in harsh EMI environments.

Availability

AD7616BSTZ is available at Aetrix Electronics and suitable for power line monitoring, protective relaying, and multiphase motor control applications requiring stable component supply, long-term industrial lifecycle support, and guaranteed traceable sourcing.

Supply support for AD7616BSTZ 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 Norwood, MA, with design centers and manufacturing facilities worldwide.

The AD7616BSTZ belongs to Analog Devices' precision data acquisition product line, engineered specifically for high-channel-count, high-accuracy industrial and energy infrastructure systems demanding simultaneous sampling, robust input protection, and integrated reference stability.

FAQ

What is the maximum sampling rate supported by the AD7616BSTZ?

The AD7616BSTZ supports a maximum throughput rate of 2 × 1 MSPS - meaning each of its dual 16-bit SAR ADCs achieves 1 million samples per second per channel pair. This is achievable across all input ranges (±10 V, ±5 V, ±2.5 V) with specified AC performance, including 90.5 dB SNR at full rate. The conversion time per channel pair is 475–520 ns, enabling tight timing control in real-time control loops.

Does the AD7616BSTZ require external op amps for signal conditioning?

No, the AD7616BSTZ does not require external op amps for most applications due to its integrated 1 MΩ analog input impedance, on-chip first-order antialiasing filter, and input clamp protection. Its high-impedance buffered input maintains accuracy across sampling frequencies, eliminating driver stages typically needed for SAR ADCs. External op amps are only necessary for specialized cases such as active filtering beyond 39 kHz or signal inversion not supported by internal configuration.

Can the AD7616BSTZ operate with an external reference, and how is it configured?

Yes, the AD7616BSTZ supports both internal and external reference operation. When REFSEL is set HIGH, the internal 2.5 V reference is enabled and appears on the REFINOUT pin. When REFSEL is LOW, the internal reference is disabled and a 2.5 V external reference must be applied to REFINOUT. A 10 kΩ series resistor is recommended for external reference band-limiting, and decoupling (100 nF X8R) between REFINOUT and REFINOUTGND is mandatory in both modes.

What package type and thermal characteristics does the AD7616BSTZ use?

The AD7616BSTZ uses an 80-lead LQFP package (ST-80-21) measuring 12 mm × 12 mm with 0.5 mm pitch. Its thermal resistance is θJA = 41°C/W (JEDEC 2S2P board) and θJC = 7.5°C/W. The package features dedicated AGND and DGND pins, separate REFCAP/REFGND/REFINOUTGND connections, and thermal pad grounding recommendations to ensure reliable operation at full throughput across −40°C to +125°C ambient.

How does the AD7616BSTZ handle channel sequencing and data readout?

The AD7616BSTZ supports both hardware- and software-controlled sequencing. In hardware mode, CHSEL2–CHSEL0 pins select up to 8 channels per bank; in software mode, registers define custom scan orders and burst depth. Data readout supports parallel (16-bit DB0–DB15) or serial (SDOA/SDOB with optional CRC) interfaces. Burst mode enables automatic sequential readout of all configured channels after a single CONVST trigger, minimizing interface overhead and CPU load.