Analog Devices Inc. AD7617BSTZ-RL

Overview

AD7617BSTZ-RL from Analog Devices is a 14-bit, dual-simultaneous-sampling, 16-channel data acquisition system (DAS) with true bipolar input ranges of ±10 V, ±5 V, and ±2.5 V; 1 MSPS throughput per channel pair; on-chip 2.5 V reference; and 80-lead LQFP package. It targets high-accuracy power line monitoring and protective relay systems requiring synchronized voltage/current sampling.

For engineers reviewing the AD7617BSTZ-RL datasheet, AD7617BSTZ-RL pinout, AD7617BSTZ-RL application, or AD7617BSTZ-RL equivalent, key selection criteria include dual simultaneous sampling capability, ±10 V bipolar input tolerance, 85 dB SNR at 1 MSPS, integrated analog front-end filtering, and SPI/parallel interface flexibility for real-time control loop integration.

Technical Context

The AD7617BSTZ-RL integrates two independent 14-bit SAR ADCs with dual simultaneous sampling across 16 analog inputs, each paired into A/B channels (e.g., V0A/V0B). Its first-order antialiasing LPF provides 39 kHz full-power bandwidth at ±10 V range and 4.4 µs phase delay, enabling precise time-aligned acquisition in multiphase systems.

Digital configuration supports hardware mode (fixed input ranges via HW_RNGSEL pins) or software mode (register-based channel sequencing, oversampling, CRC, and burst operation). The device uses a single 5 V analog supply and separate 2.3–3.6 V VDRIVE for digital I/O, with 1 MΩ input impedance maintained across all sampling frequencies and input ranges.

Key Specifications

Pinout & Package

AD7617BSTZ-RL is housed in an 80-lead LQFP (ST-80-21) package with exposed pad for thermal management. Pin functions are fully defined in Analog Devices' Rev. 0 datasheet, including dedicated analog input pairs (V0A/V0B through V7A/V7B), ground-separated AGND/DGND/REFGND domains, and multifunction digital I/O (DB0–DB15, SER/PAR, SEQEN, HW_RNGSEL0/1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7617BSTZ-RL, AD7606C-18 trades simultaneity for higher resolution in static applications, while ADS8689 sacrifices hardware sequencing and oversampling for integrated gain control - making AD7617BSTZ-RL uniquely suited for time-critical, multi-channel synchronized acquisition in protection and motor control.

Availability

AD7617BSTZ-RL is available at Aetrix Electronics and suitable for power line monitoring, protective relaying, and multiphase motor control requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial deployments.

Supply support for AD7617BSTZ-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, headquartered in Norwood, MA, with design centers worldwide and a focus on precision signal chain solutions.

The AD7617BSTZ-RL belongs to Analog Devices' precision data acquisition product line, engineered specifically for high-reliability industrial and energy infrastructure applications demanding synchronized multichannel sampling, robust ESD tolerance, and integrated analog front-end functionality.

FAQ

What is the maximum analog input voltage the AD7617BSTZ-RL can tolerate without damage?

The AD7617BSTZ-RL features analog input clamp protection rated to ±21 V relative to AGND, exceeding its specified ±10 V operating range. This allows safe handling of transient overvoltages common in power systems and motor drives without external clamping components. Absolute maximum rating applies only to short-duration transients; sustained operation above ±10 V will saturate the ADC and invalidate conversion results. Always observe the ±10 V full-scale range for accurate 14-bit measurements in the AD7617BSTZ-RL.

Does the AD7617BSTZ-RL support true simultaneous sampling across all 16 channels?

No - the AD7617BSTZ-RL performs dual simultaneous sampling across eight independent channel pairs (e.g., V0A/V0B, V1A/V1B), not across all 16 inputs at once. Each pair is sampled concurrently with <100 ns skew, enabling precise phase-coherent acquisition for voltage/current or differential measurements. Full 16-channel coverage requires sequential scanning within the 1 MSPS per-pair throughput limit. This architecture balances timing precision with channel density in the AD7617BSTZ-RL.

Can the AD7617BSTZ-RL operate with an external reference, and how is it configured?

Yes, the AD7617BSTZ-RL supports both internal and external 2.5 V references. Configuration is controlled by the REFSEL pin: logic high enables the on-chip 2.5 V reference (±2 ppm/°C drift), while logic low disables it and allows an external 2.5 V reference to be applied to the REFINOUT pin. Decoupling is mandatory in both cases - a 100 nF X7R capacitor between REFINOUT and REFINOUTGND is required. This flexibility ensures optimal SNR and thermal stability for the AD7617BSTZ-RL in varying system-level reference architectures.

What digital interfaces does the AD7617BSTZ-RL support, and how are they selected?

The AD7617BSTZ-RL supports both parallel (16-bit DB0–DB15) and serial (SPI/QSPI/MICROWIRE/DSP-compatible) interfaces. Selection is determined by the SER/PAR pin state at power-up or full reset: logic low enables parallel mode; logic high enables serial mode. In serial mode, SDOA/SDOB outputs support dual-data-stream readout when SER1W is high, or single-stream when low. All interface timing parameters - including tSCLK, tDOUT_SETUP, and CS setup/hold - are fully specified in the AD7617BSTZ-RL datasheet for robust implementation.

How does the AD7617BSTZ-RL handle input range selection - is it configurable per channel?

The AD7617BSTZ-RL supports per-channel input range selection only in software mode via configuration registers (±10 V, ±5 V, or ±2.5 V). In hardware mode, range is set globally using the HW_RNGSEL0/HW_RNGSEL1 pins (01 = ±2.5 V, 10 = ±5 V, 11 = ±10 V). Software mode offers maximum flexibility for mixed-range sensor arrays, while hardware mode simplifies interface logic in fixed-range systems. Both modes retain the AD7617BSTZ-RL's 1 MΩ input impedance and ±21 V clamp protection regardless of selected range.