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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc. AD7606C-18BSTZ

Name: AD7606C-18BSTZ
Brand: Analog Devices Inc.
SKU: AD7606C-18BSTZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD7606C-18BSTZ

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 64-LQFP

Datasheet:: AD7606C-18BSTZ.pdf

Description:: IC ADC 18BIT SAR 64LQFP

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Product details

Overview

AD7606C-18BSTZ from Analog Devices is an 8-channel, 18-bit simultaneous-sampling analog-to-digital data acquisition system (DAS) with 1 MSPS per channel, ±21 V input clamp protection, and selectable bipolar/unipolar/differential input ranges including ±20 V differential and 0 V to 12.5 V unipolar. It integrates a precision 2.5 V reference, per-channel programmable gain amplifier (PGA), low-pass filter, and flexible digital oversampling up to 256×-used in high-accuracy power line monitoring and protective relay systems.

For engineers reviewing the AD7606C-18BSTZ datasheet, AD7606C-18BSTZ pinout, AD7606C-18BSTZ application, or AD7606C-18BSTZ equivalent, key selection criteria include simultaneous sampling integrity across all eight channels, ±0.5 ppm/°C PFS/NFS drift, 93 dB SNR at ±20 V differential range, hardware/software mode flexibility, and compatibility with industrial-grade isolation and voltage reference companion parts like ADuM142E and ADR4525.

Technical Context

The AD7606C-18BSTZ employs an 18-bit successive approximation register (SAR) ADC architecture with per-channel configurable analog front-end filtering-supporting two bandwidth modes (25 kHz and 220 kHz) and independent input range selection for each of its eight differential inputs. Its integrated 2.5 V reference buffer drives the ADC core with ±3 ppm/°C temperature coefficient and supports external reference operation.

Digital interface options include parallel (8-/16-bit bus) and serial (SPI-compatible) modes, with CRC error checking on all register reads/writes and diagnostics multiplexer support for real-time monitoring of reset detection, busy stuck status, and invalid transactions. Calibration includes per-channel system phase (±1 µs post-cal), offset (±2 LSB), and gain correction.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution & Speed	18-bit SAR ADC, 1 MSPS throughput per channel with true simultaneous sampling-enables synchronized capture across all 8 channels without inter-channel skew.
Analog Input Ranges	Per-channel selectable: ±20 V differential, ±12.5 V single-ended, 0 V to 12.5 V unipolar-supports direct connection to CT/PT outputs and industrial sensors without external signal conditioning.
Input Protection	±21 V absolute input clamp with 6 kV ESD rating-allows robust operation in noisy substation and motor control environments without external TVS diodes.
Dynamic Performance	93 dB typical SNR (±20 V differential, low-bandwidth mode); 102 dB with 32× oversampling at 50 Hz-meets Class 0.2 accuracy requirements for revenue-grade metering.
DC Accuracy	TUE ≤ 0.05% FSR max (external reference), ±0.5 ppm/°C PFS/NFS drift-ensures stable calibration over −40°C to +125°C industrial temperature range.
Power Supply	Single 5 V analog supply (AVCC), 1.71 V–5.25 V logic supply (VDRIVE)-simplifies power design and enables direct interfacing with 1.8 V/3.3 V/5 V microcontrollers.
Digital Interface	Parallel (8-/16-bit) and SPI-compatible serial modes with CRC, status flag, and diagnostics MUX-supports both high-speed deterministic readout and resource-constrained embedded hosts.

Pinout & Package

AD7606C-18BSTZ is housed in a 64-lead LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are validated per Analog Devices' Rev. B datasheet (pp. 15–17), supporting dual-mode operation (hardware/software) and mixed-signal isolation layout best practices.

Pin/Terminal	Circuit Role	Design Meaning
Vx+, Vx− (x = 1–8)	Differential analog inputs	Eight fully isolated input pairs accepting ±20 V differential signals; internal clamp diodes protect against transients up to ±21 V.
REFCAPA / REFCAPB	Reference decoupling terminals	Connect 10 µF tantalum + 100 nF ceramic capacitors to stabilize internal 2.5 V reference output at 4.4 V common-mode level for ADC core.
AVCC / AGND / DGND	Analog and digital ground/supply	Split analog/digital ground planes required; AVCC must be filtered separately to maintain >93 dB SNR performance under full-load switching noise.
RD/SCLK / WR/SDI / CS / BUSY / INT	Serial/parallel interface control	Multi-function pins support hardware mode (pin-strapped) or software mode (register-configurable) with CRC-enabled read/write cycles and interrupt-driven conversion completion signaling.
DB[0:15] / DB[0:7]	Data bus (16-bit or 8-bit multiplexed)	Configurable bus width reduces PCB trace count; 8-bit mode uses byte-swapped timing to retain full 18-bit resolution in two cycles per sample.

Key Features

Feature	Design Value
Per-channel input range selection	Each of 8 channels independently configured for ±20 V differential, ±12.5 V SE, or 0–12.5 V unipolar-eliminates external range-switching circuitry in multi-sensor DAS.
Two analog bandwidth modes	25 kHz (low-noise) or 220 kHz (fast transient capture) per channel-enables adaptive anti-aliasing without changing external filters.
Flexible digital oversampling	Oversampling ratio up to 256× with configurable FIR filter-improves effective resolution by up to 4 bits at reduced throughput, e.g., 14-bit @ 10 kSPS → 18-bit @ 625 SPS.
Analog input open-circuit detection	Real-time monitoring of disconnected sensor leads via internal current source and comparator-prevents false fault alarms in remote I/O modules.
System-level diagnostics	CRC on all register accesses, reset detection, busy-stuck monitor, and diagnostics MUX output-supports IEC 61508 SIL-2 functional safety compliance without external watchdog IC.

Applications

Power Line Monitoring	Protective Relaying
Use Scenario: Continuous measurement of voltage/current waveforms across three-phase distribution grids with harmonic analysis up to 50th order. IC Role / Device Role / Timing Role: Simultaneous 8-channel sampling captures synchronized voltage (V_A, V_B, V_C) and current (I_A, I_B, I_C, neutral, auxiliary) at 1 MSPS for cycle-by-cycle RMS, THD, and sequence calculation. Use Value: 93 dB SNR and ±0.5 ppm/°C drift ensure Class 0.2 metering accuracy over wide temperature swings; ±21 V clamping withstands lightning-induced surges.	Use Scenario: Real-time fault detection in transmission line breakers using differential current comparison and traveling-wave analysis. IC Role / Device Role / Timing Role: High-fidelity capture of pre-fault and fault transients with <15 µs full-scale settling (high-bandwidth mode) and sub-microsecond phase matching (<30 ns) between channels. Use Value: 220 kHz bandwidth and 1 µs phase calibration enable precise time-of-arrival measurements for fault location within ±100 m on 100 km lines.
Multiphase Motor Control	Industrial Data Acquisition
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase PMSM/induction motors with torque ripple suppression and vibration analysis. IC Role / Device Role / Timing Role: Simultaneous sampling of 3-phase currents, DC bus voltage, and motor temperature via thermistor-synchronized to PWM carrier edge for minimal current reconstruction delay. Use Value: 8-channel integration eliminates external multiplexers; 25 kHz low-bandwidth mode reduces switching noise aliasing while maintaining 12-bit ENOB at 10 kSPS for vibration FFT.	Use Scenario: Modular rack-mounted DAQ for test benches measuring pressure, strain, temperature, and flow in aerospace hydraulics and turbine testing. IC Role / Device Role / Timing Role: Central DAS node acquiring calibrated sensor outputs across multiple signal types (mV, V, mA) with per-channel PGA gain and range configuration stored in nonvolatile registers. Use Value: On-chip system gain/offset calibration reduces factory calibration time by >70%; CRC-protected register access ensures configuration integrity during hot-swap module insertion.

Power Line Monitoring

Protective Relaying

Use Scenario: Continuous measurement of voltage/current waveforms across three-phase distribution grids with harmonic analysis up to 50th order.

IC Role / Device Role / Timing Role: Simultaneous 8-channel sampling captures synchronized voltage (V_A, V_B, V_C) and current (I_A, I_B, I_C, neutral, auxiliary) at 1 MSPS for cycle-by-cycle RMS, THD, and sequence calculation.

Use Value: 93 dB SNR and ±0.5 ppm/°C drift ensure Class 0.2 metering accuracy over wide temperature swings; ±21 V clamping withstands lightning-induced surges.

Use Scenario: Real-time fault detection in transmission line breakers using differential current comparison and traveling-wave analysis.

IC Role / Device Role / Timing Role: High-fidelity capture of pre-fault and fault transients with <15 µs full-scale settling (high-bandwidth mode) and sub-microsecond phase matching (<30 ns) between channels.

Use Value: 220 kHz bandwidth and 1 µs phase calibration enable precise time-of-arrival measurements for fault location within ±100 m on 100 km lines.

Multiphase Motor Control

Industrial Data Acquisition

Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase PMSM/induction motors with torque ripple suppression and vibration analysis.

IC Role / Device Role / Timing Role: Simultaneous sampling of 3-phase currents, DC bus voltage, and motor temperature via thermistor-synchronized to PWM carrier edge for minimal current reconstruction delay.

Use Value: 8-channel integration eliminates external multiplexers; 25 kHz low-bandwidth mode reduces switching noise aliasing while maintaining 12-bit ENOB at 10 kSPS for vibration FFT.

Use Scenario: Modular rack-mounted DAQ for test benches measuring pressure, strain, temperature, and flow in aerospace hydraulics and turbine testing.

IC Role / Device Role / Timing Role: Central DAS node acquiring calibrated sensor outputs across multiple signal types (mV, V, mA) with per-channel PGA gain and range configuration stored in nonvolatile registers.

Use Value: On-chip system gain/offset calibration reduces factory calibration time by >70%; CRC-protected register access ensures configuration integrity during hot-swap module insertion.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision, multichannel data acquisition applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7606B-18BSTZ	Same pinout and basic functionality, but lacks per-channel bandwidth selection, open-circuit detection, and CRC diagnostics; TUE = 0.1% FSR (vs. 0.05% for AD7606C-18).	Suitable for cost-sensitive, lower-diagnostic-integrity applications where 220 kHz bandwidth and real-time sensor health monitoring are not required.	Select AD7606B-18BSTZ only when legacy AD7606B compatibility is mandatory and advanced calibration/diagnostics are unnecessary.
AD7609BSTZ	True differential input architecture (no pseudo-differential), higher 200 kSPS throughput per channel, no internal reference-requires external 2.5 V reference and more complex analog front-end design.	Better suited for ultra-high CMRR applications (e.g., medical EEG) where true differential rejection >120 dB is critical, but sacrifices ease of use and integrated features.	Choose AD7609BSTZ only when true differential input performance outweighs the need for integrated reference, clamping, and simplified layout.

Compared with AD7606B-18BSTZ, the AD7606C-18BSTZ adds diagnostic depth and tighter DC accuracy at identical pinout; versus AD7609BSTZ, it trades pure differential fidelity for integrated protection, reference, and configurability-making it optimal for industrial DAS where robustness and time-to-market matter most.

Availability

AD7606C-18BSTZ 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 support, and traceable sourcing from authorized channels.

Supply support for AD7606C-18BSTZ 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 Wilmington, MA, with design centers worldwide and ISO 9001-certified manufacturing.

The AD7606C-18BSTZ belongs to Analog Devices' precision data acquisition system (DAS) product line, engineered specifically for industrial, energy, and test equipment applications demanding simultaneous sampling, high DC accuracy, and built-in diagnostics under harsh environmental conditions.

FAQ

What is the maximum sampling rate per channel for the AD7606C-18BSTZ?

The AD7606C-18BSTZ achieves 1 MSPS (1 million samples per second) per channel with true simultaneous sampling across all eight inputs. This rate is maintained regardless of selected input range or bandwidth mode, and is specified over the full −40°C to +125°C operating temperature range. The device's 550 ns conversion time and 450 ns acquisition time enable this sustained throughput without inter-channel skew.

Does the AD7606C-18BSTZ require an external voltage reference?

No-the AD7606C-18BSTZ includes an integrated 2.5 V precision reference with ±3 ppm/°C temperature coefficient and on-chip reference buffer. It also supports external reference operation via the REF pin, allowing users to substitute higher-accuracy references like the ADR4525 when ultimate TUE performance (<0.025% FSR) is required. Internal reference mode simplifies BOM and layout for most industrial applications.

How does the AD7606C-18BSTZ handle input overvoltage conditions?

The AD7606C-18BSTZ features ±21 V input clamp protection on all analog inputs (Vx+, Vx−), combined with 6 kV HBM ESD rating. This allows direct connection to instrument transformers and industrial sensors without external protection components-even during lightning-induced surges or wiring faults. Clamping operates independently per channel and does not affect conversion accuracy of undamaged channels.

Can the AD7606C-18BSTZ operate in both hardware and software configuration modes?

Yes-the AD7606C-18BSTZ supports dual-mode operation. In hardware mode (default), it behaves as a pin-compatible upgrade to the AD7608 and AD7609 with fixed functionality. In software mode-enabled via CONFIG register-users unlock per-channel bandwidth selection, extended oversampling ratios (up to 256×), analog open-circuit detection, and full diagnostic register access. Mode selection is non-volatile and persists through power cycles.

What digital interface options does the AD7606C-18BSTZ support?

The AD7606C-18BSTZ provides both parallel (8-bit or 16-bit multiplexed bus) and serial (SPI-compatible 4-wire) interfaces. Parallel mode offers lowest latency for high-throughput systems; serial mode reduces pin count and simplifies isolation using parts like ADuM142E. Both interfaces support CRC error checking, status flag reporting, and diagnostics MUX readout-ensuring data integrity in electrically noisy environments.

AD7606C-18BSTZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 64-LQFP

Packaging:: Tray

Product Status:: Active

Number of Bits:: 18

Sampling Rate (Per Second):: 1M

Number of Inputs:: 8

Input Type:: Differential, Single Ended

Data Interface:: Parallel, Serial

Configuration:: PGA-ADC

Ratio - S/H:ADC:: 0:1

Number of A/D Converters:: 1

Architecture:: SAR

Reference Type:: External, Internal

Voltage - Supply, Analog:: 4.75V ~ 5.25V

Voltage - Supply, Digital:: 1.71V ~ 5.25V

Features:: PGA, Simultaneous Sampling

Operating Temperature:: -40°C ~ 125°C

Supplier Device Package:: 64-LQFP (10x10)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

AD7606C-18BSTZ FAQ

1.How can I place an order for AD7606C-18BSTZ through Aetrix?

Please submit a Request for Quotation (RFQ) for AD7606C-18BSTZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AD7606C-18BSTZ reliable?

The price and inventory of AD7606C-18BSTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7606C-18BSTZ is usually 5 days.

3.What payment methods are accepted for AD7606C-18BSTZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7606C-18BSTZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD7606C-18BSTZ?

AD7606C-18BSTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD7606C-18BSTZ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AD7606C-18BSTZ?

For technical support, including AD7606C-18BSTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7606C-18BSTZ requirements.

6.How does Aetrix verify that AD7606C-18BSTZ is sourced from the original manufacturer or authorized distributors?

All AD7606C-18BSTZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7606C-18BSTZ meets industry standards.

7.What is the process for return or replacement of AD7606C-18BSTZ?

All AD7606C-18BSTZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7606C-18BSTZ, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AD7606C-18BSTZ part is unused and in its original packaging.

Return procedure for AD7606C-18BSTZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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