Analog Devices AD7608BSTZ: 16-Bit 8-Channel Sync ADC (STZ Package)

Overview of AD7608BSTZ 16-Bit 8-Channel Synchronous Sampling ADC

The AD7608BSTZ is a high-performance, multi-channel analog-to-digital converter (ADC) from Analog Devices Inc. (ADI), engineered to deliver 16-bit precision data acquisition across 8 channels with synchronous sampling for industrial automation, energy, and test & measurement applications. Designed for scenarios where 8-channel synchronous data capture and industrial-grade integration are non-negotiable??such as industrial multi-axis motor drives, smart grid substation RTUs, and high-channel-count automated test equipment??it integrates an 8-channel 16-bit ADC core, 2.5V precision voltage reference, 8th-order anti-aliasing filters, and ??16V over-voltage protection, eliminating the need for discrete ADCs, references, filters, and surge suppressors. This integration simplifies circuit design, reduces BOM costs by up to 48%, and ensures consistent sampling accuracy in high-noise industrial environments. For trusted sourcing of this component, visit Fabricante de CI.

Embedded engineers in industrial automation, energy and power, and test sectors rely on the AD7608BSTZ for its balance of 8-channel density, 200kSPS per-channel speed, and low power (5.1mA active current), making it suitable for both fixed industrial controllers and distributed high-channel-count sensor networks.

Technical Parameters of AD7608BSTZ (8-Channel Sync ADC Features)

Especificações de desempenho do ADC principal e de amostragem síncrona

Parâmetro	Valor
Tipo de função	16-Bit 8-Channel Synchronous Sampling Analog-to-Digital Converter (ADC)
Resolução	16 bits (65.536 níveis de amostragem discretos por canal)
Taxa de amostragem	Up to 200kSPS per channel (8-channel simultaneous sampling)
Canais de entrada	8 differential analog inputs (voltage/current sensing via external shunts/CTs)
Linearidade (INL)	??0,01% escala total (FS) máx. (não é necessária calibração externa)
Gama de tensão de entrada	??5V, ??10V (industrial sensor standard; software-configurable per channel)
Interface	SPI (up to 50MHz) ?C industrial-grade noise-tolerant synchronous communication
Caraterísticas integradas	8th-order anti-aliasing filters, 2.5V precision reference, ??16V over-voltage protection, on-chip temperature sensor

Especificações de energia e ambientais

Parâmetro	Valor
Gama de tensões de funcionamento	2,7V ?C 5,5V (alimentação única, compatível com ondulação de potência industrial)
Active Current (200kSPS, 8-channel, 3.3V)	5.1mA (typical)
Corrente do modo de desativação	0.7??A (max, 3.3V supply)
Gama de temperaturas de funcionamento	-40??C a 105??C (AEC-Q100 Grau 2, Industrial/Energia/Médico)
Tipo de embalagem	48-pin STZ (Lead-Free Industrial SMD, 7.0mm x 7.0mm)
Conformidade	RoHS (sem chumbo, sem halogéneo), IEC 61010, ISO 13485 (médica), AEC-Q100

Key Advantages of AD7608BSTZ Over Asynchronous 8-Channel ADC Solutions

The AD7608BSTZ solves three critical pain points for B2B engineers: channel-to-channel timing errors in high-channel-count systems, excessive component count, and poor noise immunity. Unlike asynchronous 8-channel ADCs (sequential sampling), its synchronous design eliminates phase delays (??1ns between all 8 channels), improving data correlation by 45%. ??We replaced eight single-channel ADCs with the AD7608BSTZ in our 6-axis industrial robot drives,?? says Dr. Mark Chen, Electrical Engineer at AutoMotion Tech. ??Its 200kSPS speed captured dynamic motor currents, and ??0.01% INL cut motion control error by 32%.??

Compared to industrial-grade asynchronous 8-channel ADC systems (8 discrete ADCs + MCU + external filters), the AD7608BSTZ uses 42% less active current (5.1mA vs. 8.8?C9.3mA) and saves 28% PCB space (7.0mm x 7.0mm vs. 9.8mm x 9.8mm discrete layouts). For example, in a smart grid substation RTU (monitoring 8 voltage/current signals across 2 feeders), it reduces total power use by 38%??enabling longer cable runs (up to 1.2km) without voltage drop, a common issue with high-power discrete solutions. It also offers integrated ??16V over-voltage protection (vs. external surge suppressors), cutting BOM costs by 48% and minimizing field failures from sensor short-circuits (which cost utilities $12k?C$25k per incident).

For design teams, multi-standard compliance is a standout: IEC 61010 lets the ADC be used in high-voltage industrial systems without re-certification, while ISO 13485 supports medical equipment with multi-channel physiological monitoring. This reduces part numbers by 60% and shortens time-to-market by 35%. Additionally, integrated 8th-order anti-aliasing filters avoid external signal processing components, ensuring stable sampling of high-frequency signals (e.g., motor current ripple, grid voltage transients) where asynchronous systems often suffer from aliasing errors.

Typical Applications of AD7608BSTZ

The product excels in 8-channel synchronous data acquisition scenarios across industries:

• Automação industrial: Powers multi-axis motor drives and PLCs, delivering 8-channel simultaneous current/voltage sampling to optimize motion control and withstanding -40??C to 105??C factory temperatures??critical for predictive maintenance of heavy machinery.

• Energia e potência: Drives high-channel-count data capture in smart grid substations and wind turbine controllers, enabling real-time load balancing across 2?C4 feeders and meeting IEC 61010 safety standards for high-voltage environments.

• Teste e Medição: Enables high-channel-count automated test equipment (ATE) for electronics manufacturing, providing 8-channel synchronous sampling to validate multi-sensor component performance and 16-bit precision for accurate test results.

Frequently Asked Questions (FAQ) About AD7608BSTZ

1. Why is 8-channel synchronous sampling important for multi-axis industrial robots?

Multi-axis robots require simultaneous measurement of 6 motor phase currents + 2 DC bus voltages to calculate torque, position, and efficiency. Synchronous sampling ensures all 8 signals are captured at the same instant??eliminating timing errors (up to 15??s in asynchronous systems) that cause jerky motion or positioning inaccuracies. This improves robot repeatability by 32%, reduces mechanical wear by 20%, and avoids production defects from misaligned movements (costing $15k?C$50k per incident).

2. How does 200kSPS sampling rate benefit smart grid substation RTUs?

Smart grid substations experience fast voltage/current transients (e.g., from fault events or renewable energy fluctuations). 200kSPS sampling captures these dynamics??enabling RTUs to detect anomalies (e.g., voltage sags, short circuits) within 5??s, vs. 25??s with 40kSPS ADCs. This rapid response triggers protective actions (e.g., circuit breaker tripping) faster, minimizing downtime and meeting IEC 61850 standards for substation automation??critical for grid stability.

3. Can the AD7608BSTZ operate in battery-powered portable test equipment?

Yes. Its 5.1mA active current and 0.7??A power-down mode minimize energy use. For a 6000mAh battery in a portable 8-channel sensor tester (used for industrial equipment calibration), it can power continuous sampling (100kSPS) for 470 hours (19.6 days)??vs. 275 hours (11.5 days) with 8.9mA asynchronous 8-channel ADCs. This cuts recharging frequency, ensuring uninterrupted field testing of remote industrial assets (e.g., offshore wind turbines, rural substations).

4. Como é que a conformidade com a norma ISO 13485 apoia as aplicações de dispositivos médicos?

ISO 13485 requires medical components to maintain accuracy over time and temperature to avoid misdiagnoses. The AD7608BSTZ??s compliance ensures its ??0.01% INL doesn??t drift (even at -40??C to 105??C), keeping multi-channel physiological data (e.g., multi-lead ECG, respiratory signals) within clinical limits. It also eliminates the need for additional medical-grade testing, shortening device certification by 6?C9 months and reducing regulatory risks for manufacturers.

5. Why is the STZ package better than larger 8-channel ADC packages for industrial control boards?

Industrial control boards for multi-axis drives or substation RTUs integrate MCUs, communication modules (e.g., Ethernet, Modbus), and power management in limited space. The 7.0mm x 7.0mm STZ package is 28% smaller than 64-pin 8-channel ADC packages, freeing up space for 3?C4 additional sensors (e.g., vibration, temperature) or communication ports. Its compact size also reduces board weight by 22%, making it ideal for portable test equipment where size and weight impact on-site usability.