AD7608BSTZ - 8-Channel 18-Bit Simultaneous Sampling ADC | Analog Devices
MPN: AD7608BSTZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $27.75 | $27.75 |
| 10 | $26.05 | $260.50 |
| 100 | $24.5 | $2,450.00 |
| 500 | $22.8 | $11,400.00 |
| 1,000 | $21.2 | $21,200.00 |
Drop-in alternatives for AD7608BSTZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD7606BSTZ
β Drop-Inβ In Stock
$17.2 / Unit
View Datasheet βAD7606CSTZ
β Drop-Inπ Reference alternative (not in catalog)
AD7606CSBZ
β Drop-Inπ Reference alternative (not in catalog)
MAX11046ECB+
β Drop-Inπ Reference alternative (not in catalog)
LTC2348ILX-18
β Drop-Inπ Reference alternative (not in catalog)
AD7608BSTZ Maximum Ratings & Electrical Characteristics
| Resolution | 18 bit |
| Number of Channels | 8 |
| Sampling Rate | 200 kSPS |
| Input Type | Bipolar |
| Input Voltage Range | Β±10 V, Β±5 V, Β±2.5 V |
| Interface | SPI, DSP, Parallel |
| Supply Voltage | 5 V |
| Reference Voltage | 2.5 V internal |
| Package | 64-LQFP (10x10 mm) |
| Operating Temperature | -40Β°C to +85Β°C |
| Mounting Type | Surface Mount |
| Number of Pins | 64 |
| RoHS Status | Compliant |
| MSL Level | 3 |
| Antialiasing Filter | Second-order |
AD7608BSTZ Pin Configuration
| Pin 1 | AVCC β Analog supply voltage |
| Pin 2 | V1 β Analog input channel 1 |
| Pin 3 | V2 β Analog input channel 2 |
| Pin 4 | V3 β Analog input channel 3 |
| Pin 5 | V4 β Analog input channel 4 |
| Pin 6 | V5 β Analog input channel 5 |
| Pin 7 | V6 β Analog input channel 6 |
| Pin 8 | V7 β Analog input channel 7 |
| Pin 9 | V8 β Analog input channel 8 |
| Pin 10 | AGND β Analog ground |
| Pin 11 | REFIN/REFOUT β Reference input/output |
| Pin 12 | REFCAP β Reference decoupling |
| Pin 13 | DVCC β Digital supply voltage |
| Pin 14 | DGND β Digital ground |
| Pin 15 | CS β Chip select |
| Pin 16 | SCLK β Serial clock |
| Pin 17 | SDI β Serial data input |
| Pin 18 | SDO β Serial data output |
| Pin 19 | BUSY β Busy indicator |
| Pin 20 | RESET β Reset input |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD7608BSTZ is suitable for 6 applications: Power Line Monitoring, Motor Control, Vibration Analysis, Energy Metering, Instrumentation, Protective Relays.
Power Line Monitoring
The AD7608BSTZ is ideal for power line monitoring systems that require simultaneous sampling of multiple voltage and current channels. Its 18-bit resolution and 200 kSPS sampling rate enable accurate measurement of harmonics and transients. The bipolar input range of Β±10 V directly interfaces with voltage and current transformers, simplifying the analog front end. The integrated antialiasing filter reduces external component count, and the flexible digital filter allows trade-offs between noise and bandwidth. This makes the AD7608BSTZ a robust solution for protective relays and power quality analyzers.
Recommended
Motor Control
In motor control applications, the AD7608BSTZ provides simultaneous sampling of three-phase currents and voltages, essential for accurate vector control. The 18-bit resolution ensures precise current sensing, while the 200 kSPS rate captures fast transients. The bipolar inputs accommodate current sensor outputs without level shifting. The integrated reference and buffer reduce external components, and the parallel interface allows high-speed data transfer to the controller. This enables efficient field-oriented control (FOC) algorithms for industrial drives.
Recommended
Vibration Analysis
The AD7608BSTZ is well-suited for vibration analysis systems that monitor multiple accelerometers simultaneously. Its 18-bit resolution and 200 kSPS sampling rate capture high-frequency vibration signals with excellent dynamic range. The simultaneous sampling preserves phase relationships between channels, crucial for modal analysis. The bipolar input range of Β±5 V matches typical accelerometer outputs, and the antialiasing filter prevents aliasing. The serial interface simplifies connection to FPGAs or DSPs, making it a preferred choice for condition monitoring and predictive maintenance.
Recommended
Energy Metering
For multi-phase energy metering, the AD7608BSTZ offers simultaneous sampling of voltage and current from all phases, ensuring accurate power and energy calculations. The 18-bit resolution provides high accuracy over a wide dynamic range, essential for revenue-grade metering. The bipolar inputs directly connect to current transformers and voltage dividers. The integrated reference and buffer maintain accuracy over temperature, and the flexible digital filter helps reduce noise. This makes the AD7608BSTZ a cost-effective solution for smart meters and power quality analyzers.
Recommended
Instrumentation
The AD7608BSTZ is used in high-precision instrumentation such as data loggers and spectrum analyzers. Its 18-bit resolution and simultaneous sampling enable accurate multi-channel measurements. The bipolar input ranges and integrated antialiasing filter simplify front-end design. The serial interface allows easy connection to microcontrollers, and the flexible digital filter provides noise reduction. This makes it ideal for laboratory equipment and portable test instruments where accuracy and channel density are critical.
Recommended
Protective Relays
In protective relays, the AD7608BSTZ provides simultaneous sampling of multiple voltage and current channels, essential for fast and accurate fault detection. The 18-bit resolution ensures precise measurement of fault currents, while the 200 kSPS rate captures transients. The bipolar inputs interface directly with CTs and PTs, and the integrated antialiasing filter reduces noise. The parallel interface enables high-speed data transfer to the relay processor, ensuring timely trip decisions. This makes the AD7608BSTZ a reliable choice for power system protection.
Recommended
Recommended Products Summary
Engineering reference data for AD7608BSTZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7606BSTZ | AD7606CSTZ | AD7606CSBZ | MAX11046ECB+ | LTC2348ILX-18 |
|---|---|---|---|---|---|---|
| Package | 64-LQFP | 64-LQFP | 64-LQFP | 64-LQFP | 64-LQFP | 64-LQFP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated | Analog Devices |
| Resolution | 18 bit | 16 bit | 16 bit | 16 bit | 16 bit | 18 bit |
| Sampling Rate | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS | 250 kSPS | 200 kSPS |
| Input Voltage Range | Β±10 V, Β±5 V, Β±2.5 V | Β±10 V, Β±5 V, Β±2.5 V | Β±10 V, Β±5 V, Β±2.5 V | Β±10 V, Β±5 V, Β±2.5 V | Β±5 V | Β±10.24 V |
| Interface | SPI, DSP, Parallel | SPI, DSP, Parallel | SPI, DSP, Parallel | SPI, DSP, Parallel | Parallel | SPI |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Price (1 pcs) | $27.75 | $20.00 | $22.00 | $21.00 | $25.00 | $30.00 |
Key Differentiators
- 18-bit resolution (vs AD7606BSTZ)
- Integrated antialiasing filter (vs MAX11046ECB+)
- Flexible digital filter (vs LTC2348ILX-18)
Design Notes
The AD7608BSTZ requires a clean 5 V analog supply (AVCC) and digital supply (DVCC). Use separate linear regulators for AVCC and DVCC to minimize digital noise coupling. Place 10 Β΅F and 0.1 Β΅F decoupling capacitors close to each supply pin. The internal reference buffer requires a 1 Β΅F capacitor on REFCAP for stability.
For optimal performance, use a solid ground plane and separate analog and digital ground areas, connecting them at a single point. Keep analog input traces short and shielded to reduce noise pickup. The 64-LQFP package has an exposed pad; solder it to the PCB for improved thermal performance and mechanical stability.
Ensure the input voltage does not exceed the absolute maximum ratings. The flexible digital filter increases settling time; configure the oversampling ratio according to your throughput requirements. The BUSY pin indicates conversion completion; do not initiate a new conversion before BUSY goes low. Refer to the datasheet for timing diagrams.
Compliance Information
RoHS compliant per distributor data. Not AEC-Q100 qualified.