Analog Devices Inc. AD7616-PBSTZ

Overview

AD7616-PBSTZ from Analog Devices is a 16-bit, dual-simultaneous-sampling data acquisition system (DAS) with 16 analog input channels, true bipolar ±10 V/±5 V/±2.5 V input ranges, 1 MSPS per channel pair throughput, and integrated 2.5 V reference. It operates from a single 5 V analog supply and 2.3–3.6 V VDRIVE, eliminating external op amps and bipolar supplies in power line monitoring and protective relay systems.

For engineers reviewing the AD7616-PBSTZ datasheet, AD7616-PBSTZ pinout, AD7616-PBSTZ application, or AD7616-PBSTZ equivalent, key selection criteria include dual simultaneous sampling capability, ±10 V bipolar input tolerance, 90.5 dB SNR at 1 MSPS, 8 kV ESD rating on analog inputs, and parallel interface timing compliance with tCONV ≤ 530 ns and tACQ ≤ 470 ns.

Technical Context

The AD7616-PBSTZ integrates two independent 16-bit SAR ADCs with dual simultaneous sampling architecture, enabling synchronized capture of paired channels (e.g., V0A/V0B) without inter-channel skew. Its on-chip first-order antialiasing LPF provides 39 kHz full-power bandwidth at ±10 V range and 4.4 µs phase delay, while internal digital oversampling (OSR = 2) boosts SNR to 92 dB at 500 kSPS.

It employs hardware- and software-configurable channel sequencing, flexible input range selection per channel, and a 1 MΩ buffered analog input impedance stable across temperature and sampling rate. The device supports both internal 2.5 V reference (±10 ppm/°C drift) and external reference via REFINOUT, with REFSEL pin latching at full reset.

Key Specifications

Pinout & Package

AD7616-PBSTZ is housed in an 80-lead LQFP package (ST-80-21) with exposed pad, θJA = 41°C/W, and standard JEDEC 2S2P thermal layout requirements. 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, AD7606C-18 offers higher resolution but sacrifices parallel interface speed and real-time determinism, while LTC2358-18 trades channel count and integrated sequencing for gain flexibility and smaller footprint - neither matches the AD7616-PBSTZ's combination of 16-channel simultaneity, ±10 V bipolar input, and parallel bus latency control.

Availability

AD7616-PBSTZ is available at Aetrix Electronics and suitable for power line monitoring, protective relaying, and multiphase motor control requiring stable component supply, long-term industrial lifecycle support, and traceable sourcing from authorized channels.

Supply support for AD7616-PBSTZ 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.

The AD7616-P product line delivers fully integrated, high-channel-count data acquisition solutions optimized for industrial automation, energy infrastructure, and test equipment where simultaneous sampling, bipolar input robustness, and system-level integration reduce bill-of-materials and PCB area.

FAQ

What is the maximum analog input voltage tolerance for AD7616-PBSTZ before clamp protection activates?

The AD7616-PBSTZ analog input clamp protection tolerates voltages up to ±21 V relative to AGND, independent of selected input range (±10 V, ±5 V, or ±2.5 V). This allows safe operation during transient overvoltage events in industrial environments without external TVS diodes. The clamping action is internal and does not affect normal operation within the specified ±10 V range. AD7616-PBSTZ maintains full 16-bit performance up to its rated input range limits.

Does AD7616-PBSTZ support simultaneous sampling across all 16 channels?

No - AD7616-PBSTZ performs dual simultaneous sampling: it captures two channels (one from ADC A and one from ADC B) at the exact same instant, such as V0A and V0B. All 16 channels are sampled sequentially using the internal sequencer, with hardware or software control over scan order. The device achieves full 16-channel acquisition at up to 1 MSPS per pair, meaning total system throughput is 8 MSPS for all channels in burst mode. AD7616-PBSTZ does not acquire all 16 channels simultaneously in a single conversion event.

Can AD7616-PBSTZ operate with only the internal 2.5 V reference enabled?

Yes - AD7616-PBSTZ can operate using only its internal 2.5 V reference by tying REFSEL high at power-up or after full reset. The internal reference exhibits ±10 ppm/°C drift and is buffered on-chip to drive external circuitry via REFINOUT. No external reference component is required, and the device achieves ±1 LSB INL and 90.5 dB SNR at 1 MSPS under these conditions. AD7616-PBSTZ supports seamless switching to external reference by pulling REFSEL low and applying 2.5 V ±5 mV to REFINOUT.

What is the minimum acquisition time required for AD7616-PBSTZ to achieve full 16-bit accuracy?

The AD7616-PBSTZ specifies a typical acquisition time (tACQ) of 470 ns, which is the minimum time the analog input must settle before conversion begins. This value is guaranteed across temperature and supply variations and is sufficient to achieve ±1 LSB INL and full 16-bit effective resolution when used with the on-chip 1 MΩ input buffer and recommended decoupling. AD7616-PBSTZ does not require external acquisition timing control - the internal timing generator enforces tACQ automatically after CONVST assertion.

Is the parallel interface of AD7616-PBSTZ compatible with 3.3 V microcontrollers?

Yes - AD7616-PBSTZ's parallel interface operates with VDRIVE supplied from 2.3 V to 3.6 V, making it directly compatible with 3.3 V logic families. When VDRIVE = 3.3 V, digital inputs require VIH ≥ 2.0 V and VIL ≤ 0.8 V, and outputs drive VOH ≥ 3.1 V and VOL ≤ 0.4 V at 100 µA load. The DB0–DB15 bus is three-state controlled by CS and RD, and timing parameters (e.g., tDOUT_SETUP = 40 ns) are validated at 3.3 V. AD7616-PBSTZ requires no level-shifting when interfaced to standard 3.3 V MCUs or FPGAs.