Analog Devices Inc. AD7606C-16BSTZ

Overview

AD7606C-16 from Analog Devices is a 16-bit, 8-channel simultaneous-sampling data acquisition system (DAS) with bipolar input support, 1 MSPS per channel throughput, ±21 V input clamp protection, and integrated 2.5 V precision reference. It serves as the core analog front end in high-reliability power monitoring and protective relay systems requiring synchronized multi-channel voltage measurement across ±20 V differential or ±12.5 V single-ended ranges.

For engineers reviewing the AD7606C-16 datasheet, AD7606C-16 pinout, AD7606C-16 application, or AD7606C-16 equivalent, key selection criteria include simultaneous sampling accuracy at 1 MSPS, per-channel programmable input range selection (±20 V to 0–5 V), flexible digital filtering (oversampling up to 256×), hardware/software mode configurability, and −40°C to +125°C industrial temperature operation.

Technical Context

The AD7606C-16 integrates eight independent analog signal chains-each comprising a programmable gain amplifier (PGA), low-pass filter (LPF), and 16-bit SAR ADC-enabling true simultaneous sampling across all channels. Its dual-bandwidth analog front end supports 25 kHz (low noise) and 220 kHz (high speed) per-channel configurations, with phase delay matching as tight as 30 ns in high-bandwidth mode.

Digital functionality includes parallel and serial (SPI-compatible) interfaces, per-channel system calibration (gain, offset, phase), analog input open-circuit detection, and CRC error checking on register reads/writes and conversion data. Hardware mode ensures pin-to-pin compatibility with AD7606/AD7606B; software mode unlocks advanced features like per-channel range and bandwidth selection.

Key Specifications

Pinout & Package

LQFP-64 package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad (EP). Pinout optimized for analog isolation: dedicated AGND/DGND planes, separate AVCC/DVCC supplies, and grouped analog inputs (V1+ to V8+, V1− to V8−) with adjacent reference and clock pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multichannel simultaneous-sampling ADC applications.

Compared with AD7606B-16BSTZ, the AD7606C-16 adds 256× oversampling, per-channel bandwidth control, and open-circuit detection-critical for next-gen relays and PMUs-while ADS8688IPWR offers lower system cost only when simultaneous sampling is not required and external component integration is acceptable.

Availability

AD7606C-16 is available at Aetrix Electronics and suitable for power line monitoring, protective relaying, and multiphase motor control applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial OEMs.

Supply support for AD7606C-16 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision data conversion and power management solutions.

The AD7606C-16 belongs to Analog Devices' high-accuracy simultaneous-sampling DAS product line, designed specifically for mission-critical industrial energy systems where synchronized multi-channel acquisition, robustness, and diagnostic integrity are mandatory.

FAQ

What is the maximum simultaneous sampling rate supported by the AD7606C-16?

The AD7606C-16 supports 1 MSPS (1 million samples per second) on all eight channels simultaneously. This rate is maintained across all supported input ranges-including ±20 V differential and 0–12.5 V unipolar-and is enabled by its parallel architecture and internal 5 V analog supply. Oversampling modes reduce effective throughput (e.g., 125 kSPS at 256× oversampling), but base-rate performance remains fixed at 1 MSPS per channel without oversampling.

Does the AD7606C-16 require an external reference voltage?

No, the AD7606C-16 includes an integrated 2.5 V precision reference with ±3 ppm/°C temperature coefficient, sufficient for most applications. However, it also supports external reference input (2.495 V to 2.505 V) via the REF pin for higher accuracy or system-level reference synchronization. When using the internal reference, REFCAPA and REFCAPB pins must be decoupled with 10 µF capacitors to achieve the specified ±0.05% FSR TUE performance in the AD7606C-16.

How does the AD7606C-16 handle analog input protection in overvoltage conditions?

Each analog input pair (Vx+, Vx−) on the AD7606C-16 features integrated ±21 V clamp protection with 6 kV ESD rating per IEC 61000-4-2 Level 4. This allows direct connection to industrial sensors and CT/PT outputs without external TVS diodes. The clamping operates independently per channel and is compatible with all input ranges. During overvoltage events, current is shunted to AGND or AVCC rails, and the device maintains functional integrity as long as absolute maximum ratings (±21 V) are not exceeded.

Can the AD7606C-16 perform per-channel calibration, and what parameters are adjustable?

Yes, the AD7606C-16 supports per-channel system calibration in software mode. Adjustable parameters include system gain (via series resistor on Vx+/Vx− lines, range 1–64 kΩ), system offset (−128 to +127 LSB), and system phase (1–255 µs delay correction). After calibration, residual PFS/NFS error is ±15 LSB, offset error is ±0.5 LSB, and phase error is ±1 µs-enabling sub-degree angle accuracy in phasor measurement applications using the AD7606C-16.

What digital interface options does the AD7606C-16 support, and how do they differ in implementation?

The AD7606C-16 supports both parallel and serial (SPI-compatible) interfaces. In parallel mode, four 16-bit data buses (DOUTA–DOUTD) allow 8-channel data readout in two cycles using RD and CS signals. In serial mode, conversion results are clocked out on four DOUTx lines simultaneously (quad-SPI), reducing pin count and PCB routing complexity. Both modes support CRC error checking and status reporting, but serial mode requires fewer GPIOs and is preferred for space-constrained designs, whereas parallel mode delivers lowest latency for time-critical control loops using the AD7606C-16.