Analog Devices Inc. AD7616-PBSTZ-RL

Overview

AD7616-PBSTZ-RL from Analog Devices is a 16-channel, dual-simultaneous-sampling, 16-bit bipolar-input data acquisition system (DAS) with integrated SAR ADCs, ±10 V/±5 V/±2.5 V input ranges, 1 MSPS per channel pair throughput, and on-chip 2.5 V reference. It operates from a single 5 V analog supply and supports high-precision power line monitoring and protective relay systems.

For engineers reviewing the AD7616-PBSTZ-RL datasheet, AD7616-PBSTZ-RL pinout, AD7616-PBSTZ-RL application, or AD7616-PBSTZ-RL equivalent, key selection criteria include dual simultaneous sampling capability, true bipolar input support up to ±10 V, oversampling-enabled 92 dB SNR, parallel interface timing compliance, and 80-lead LQFP package thermal performance in industrial environments.

Technical Context

The AD7616-PBSTZ-RL integrates two independent 16-bit charge redistribution SAR ADCs with dual simultaneous sampling across 16 analog inputs grouped into eight A/B channel pairs. Its analog front end includes first-order antialiasing filters, 1 MΩ input impedance buffers, and ±21 V clamp protection per input.

Digital functionality comprises a flexible hardware/software-configurable sequencer, burst mode operation, optional CRC error checking, and a high-speed parallel interface (DB0–DB15) with programmable VDRIVE (2.3 V–3.6 V) for logic-level compatibility. Internal 2.5 V reference with ±10 ppm/°C drift and external reference support via REFINOUT/REFSEL are fully supported.

Key Specifications

Pinout & Package

AD7616-PBSTZ-RL is housed in an 80-lead LQFP (ST-80-21) package with exposed pad, θJA = 41°C/W, θJC = 7.5°C/W. Pin functions are validated per Analog Devices AD7616-P Rev. 0 datasheet, Pages 10–12.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar data acquisition system applications.

Compared with AD7616-PBSTZ-RL, AD7606C-18 trades integrated oversampling and reference for higher DC precision, while LTC2348-18 sacrifices channel count and simultaneity for smaller footprint and serial interface - making AD7616-PBSTZ-RL optimal for 16-channel, parallel-interface, high-dynamic-range industrial DAS.

Availability

AD7616-PBSTZ-RL is available at Aetrix Electronics and suitable for power line monitoring, protective relaying, and multiphase motor control requiring stable component supply across extended temperature and long-lifecycle deployments.

Supply support for AD7616-PBSTZ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The AD7616-P product line delivers integrated data acquisition solutions targeting high-reliability industrial energy infrastructure, where dual-simultaneous sampling, bipolar input flexibility, and on-chip signal conditioning reduce system complexity.

FAQ

What is the maximum analog input voltage the AD7616-PBSTZ-RL can tolerate without damage?

The AD7616-PBSTZ-RL features analog input clamp protection rated for ±21 V relative to AGND, as specified in the Absolute Maximum Ratings table. This withstands transient overvoltages common in industrial field wiring and CT/PT secondary circuits. Operation within the specified ±10 V, ±5 V, or ±2.5 V input ranges ensures full 16-bit performance; exceeding these ranges risks clipping but not immediate failure due to clamping. Always observe the 10 mA absolute maximum input current limit per pin.

Does the AD7616-PBSTZ-RL support both hardware and software configuration modes?

Yes, the AD7616-PBSTZ-RL supports dual configuration modes selected via HW_RNGSEL0/HW_RNGSEL1 pins at full reset. In hardware mode, input range is fixed (±2.5 V, ±5 V, or ±10 V) and channel selection uses CHSEL0–CHSEL2. In software mode, all parameters-including range, sequencer stack, and filter settings-are controlled via parallel register writes to DB0–DB15. The PAR pin must be low at power-up to enable the parallel interface required for software mode.

What is the purpose of the REGCAP and REGCAPD pins on the AD7616-PBSTZ-RL?

REGCAP (Pin 31) and REGCAPD (Pin 52) are dedicated decoupling capacitor connections for the AD7616-PBSTZ-RL's internal analog and digital LDO regulators. REGCAP supplies the 1.87 V analog regulator output (decoupled to REGGND), while REGCAPD supplies the 1.89 V digital regulator output (decoupled to REGGNDD). Each requires a separate 10 µF X5R/X7R ceramic capacitor placed adjacent to the pin. Proper decoupling here is mandatory to maintain SNR >90 dB and prevent digital noise coupling into the analog conversion path.

How does oversampling improve performance in the AD7616-PBSTZ-RL?

Oversampling in the AD7616-PBSTZ-RL uses on-chip digital filtering to average multiple samples, improving SNR by up to 3 dB (e.g., 92 dB at OSR = 2, 500 kSPS) and reducing quantization noise floor. It also enhances effective resolution for low-frequency signals and relaxes external anti-aliasing filter requirements. Oversampling is configured via the OSR register and applies uniformly across all channels; throughput decreases proportionally (e.g., 500 kSPS effective rate at OSR = 2), but inter-channel simultaneity and timing alignment are preserved.

Can the AD7616-PBSTZ-RL operate with an external reference, and how is it enabled?

Yes, the AD7616-PBSTZ-RL supports external reference operation. To enable it, set REFSEL (Pin 35) to logic low before releasing full reset; this disables the internal 2.5 V reference and configures REFINOUT (Pin 33) as an input. Apply a stable 2.5 V ±5 mV external reference with ≤10 ppm/°C drift and decouple using a 100 nF X7R capacitor to REFINOUTGND. A 10 kΩ series resistor is recommended to band-limit noise. Internal reference remains available if REFSEL is high.