AD7608BSTZ - 8-Channel 18-Bit Simultaneous Sampling ADC | Analog Devices
MPN: AD7608BSTZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $27.75 | $27.75 |
| 10 | $26.05 | $260.50 |
| 100 | $24.35 | $2,435.00 |
| 500 | $22.65 | $11,325.00 |
| 1,000 | $20.95 | $20,950.00 |
Drop-in alternatives for AD7608BSTZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7606BSTZ
✅ Drop-In✓ In Stock
$16.9 / Unit
View Datasheet →AD7606CSTZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD7606CSBZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD7609BSTZ
✅ Drop-In✓ In Stock
$36.8 / Unit
View Datasheet →AD7606BSTZ-RL
✅ Drop-In✓ In Stock
$15.2 / Unit
View Datasheet →AD7608BSTZ Maximum Ratings & Electrical Characteristics
| Resolution | 18 bit |
| Number of Channels | 8 |
| Sampling Rate | 200 kSPS per channel |
| Input Type | Bipolar |
| Input Voltage Range | ±10 V, ±5 V, ±2.5 V |
| Interface | SPI, DSP, Parallel |
| Supply Voltage | 5 V |
| Reference Voltage | 2.5 V internal |
| Package | 64-LQFP (10x10 mm) |
| Operating Temperature Range | -40°C to +85°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 — Analog supply voltage (5 V) |
| Pin 2 | V1 — Analog input channel 1 |
| Pin 3 | V2 — Analog input channel 2 |
| Pin 4 | V3 — Analog input channel 3 |
| Pin 5 | V4 — Analog input channel 4 |
| Pin 6 | V5 — Analog input channel 5 |
| Pin 7 | V6 — Analog input channel 6 |
| Pin 8 | V7 — Analog input channel 7 |
| Pin 9 | V8 — Analog input channel 8 |
| Pin 10 | AGND — Analog ground |
| Pin 11 | REFIN/REFOUT — Reference input/output |
| Pin 12 | REFCAP — Reference decoupling capacitor |
| Pin 13 | RANGE — Input range selection |
| Pin 14 | OS0 — Oversampling ratio bit 0 |
| Pin 15 | OS1 — Oversampling ratio bit 1 |
| Pin 16 | OS2 — Oversampling ratio bit 2 |
| Pin 17 | PAR/SER/BYTE — Parallel/serial/byte selection |
| Pin 18 | STBY — Standby mode input |
| Pin 19 | CONVST A — Conversion start A |
| Pin 20 | CONVST B — Conversion start B |
| Pin 21 | BUSY — Busy output |
| Pin 22 | FRSTDATA — First data output |
| Pin 23 | CS — Chip select |
| Pin 24 | RD/SCLK — Read/Serial clock |
| Pin 25 | WR/DIN — Write/Serial data input |
| Pin 26 | DB0 — Parallel data bit 0 |
| Pin 27 | DB1 — Parallel data bit 1 |
| Pin 28 | DB2 — Parallel data bit 2 |
| Pin 29 | DB3 — Parallel data bit 3 |
| Pin 30 | DB4 — Parallel data bit 4 |
| Pin 31 | DB5 — Parallel data bit 5 |
| Pin 32 | DB6 — Parallel data bit 6 |
| Pin 33 | DB7 — Parallel data bit 7 |
| Pin 34 | DB8 — Parallel data bit 8 |
| Pin 35 | DB9 — Parallel data bit 9 |
| Pin 36 | DB10 — Parallel data bit 10 |
| Pin 37 | DB11 — Parallel data bit 11 |
| Pin 38 | DB12 — Parallel data bit 12 |
| Pin 39 | DB13 — Parallel data bit 13 |
| Pin 40 | DB14 — Parallel data bit 14 |
| Pin 41 | DB15 — Parallel data bit 15 |
| Pin 42 | DGND — Digital ground |
| Pin 43 | DVCC — Digital supply voltage (5 V) |
| Pin 44 | VDRIVE — Interface supply voltage |
| Pin 45 | RESET — Reset input |
| Pin 46 | DOUTA — Serial data output A |
| Pin 47 | DOUTB — Serial data output B |
| Pin 48 | DOUTC — Serial data output C |
| Pin 49 | DOUTD — Serial data output D |
| Pin 50 | DB16 — Parallel data bit 16 |
| Pin 51 | DB17 — Parallel data bit 17 |
| Pin 52 | DB18 — Parallel data bit 18 |
| Pin 53 | DB19 — Parallel data bit 19 |
| Pin 54 | DB20 — Parallel data bit 20 |
| Pin 55 | DB21 — Parallel data bit 21 |
| Pin 56 | DB22 — Parallel data bit 22 |
| Pin 57 | DB23 — Parallel data bit 23 |
| Pin 58 | DB24 — Parallel data bit 24 |
| Pin 59 | DB25 — Parallel data bit 25 |
| Pin 60 | DB26 — Parallel data bit 26 |
| Pin 61 | DB27 — Parallel data bit 27 |
| Pin 62 | DB28 — Parallel data bit 28 |
| Pin 63 | DB29 — Parallel data bit 29 |
| Pin 64 | DB30 — Parallel data bit 30 |
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, Multi-Phase Energy Metering, Vibration Analysis, Protective Relays, Instrumentation.
Power Line Monitoring
The AD7608BSTZ is ideal for power line monitoring due to its 8-channel simultaneous sampling capability, which preserves phase relationships between voltage and current waveforms. With 18-bit resolution and bipolar input ranges of ±10 V, ±5 V, and ±2.5 V, it can directly interface with potential transformers and current transformers. The integrated antialiasing filter and input clamp protection simplify the analog front-end, reducing component count. The device's 200 kSPS per channel sampling rate allows accurate measurement of harmonics and transients, essential for power quality analysis. According to the AD7608 datasheet, it is specifically designed for power-line monitoring and protective relay applications.
Recommended
Motor Control
In motor control, the AD7608BSTZ provides simultaneous sampling of three-phase currents and voltages, enabling precise vector control algorithms. The 18-bit resolution ensures accurate current sensing, while the bipolar inputs accommodate bidirectional current flow. The device's high sampling rate of 200 kSPS per channel allows real-time monitoring of fast-changing signals. The integrated digital filter can be configured to reduce noise, improving control loop stability. The 64-LQFP package is compact, fitting into space-constrained motor drives. According to the AD7608 datasheet, the device is suitable for industrial motor control applications.
Recommended
Multi-Phase Energy Metering
The AD7608BSTZ is well-suited for multi-phase energy metering, where accurate measurement of voltage and current across multiple phases is critical. Its 8 channels can simultaneously sample all phases, ensuring accurate power and energy calculations. The 18-bit resolution provides high dynamic range, capturing both small and large signals. The bipolar input ranges allow direct connection to current transformers and voltage dividers. The device's low power consumption and industrial temperature range make it suitable for smart meters. According to the AD7608 datasheet, it is designed for energy metering applications.
Recommended
Vibration Analysis
The AD7608BSTZ is used in vibration analysis systems where multiple accelerometers need to be sampled simultaneously to preserve phase information. The 8-channel simultaneous sampling ensures that all sensor signals are captured at the same instant, which is essential for modal analysis and condition monitoring. The 18-bit resolution allows detection of small vibration amplitudes, while the bipolar inputs accommodate both positive and negative accelerations. The device's high sampling rate supports analysis of high-frequency vibrations. The integrated antialiasing filter reduces aliasing, improving measurement accuracy. According to the AD7608 datasheet, it is suitable for instrumentation applications.
Recommended
Protective Relays
The AD7608BSTZ is ideal for protective relays in power systems, where fast and accurate measurement of voltage and current is critical for fault detection. The simultaneous sampling of all channels ensures that phase relationships are preserved, enabling accurate impedance calculation. The 18-bit resolution provides high accuracy, while the bipolar inputs handle the wide dynamic range of fault currents. The device's fast sampling rate of 200 kSPS allows quick response to transients. The integrated digital filter can be configured to balance noise and speed. According to the AD7608 datasheet, it is designed for protective relay applications.
Recommended
Instrumentation
The AD7608BSTZ is used in general instrumentation, such as data loggers and test equipment, where multi-channel simultaneous sampling is required. The 8-channel input allows monitoring of multiple signals simultaneously, while the 18-bit resolution ensures high measurement accuracy. The bipolar input ranges accommodate a variety of sensor outputs, and the serial/parallel interfaces provide flexibility in system integration. The device's compact 64-LQFP package is suitable for portable instruments. According to the AD7608 datasheet, it is suitable for a wide range of instrumentation applications.
Recommended
Recommended Products Summary
Engineering reference data for AD7608BSTZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7606BSTZ | AD7606CSTZ | AD7606CSBZ | AD7609BSTZ |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 18 bit | 16 bit | 16 bit | 16 bit | 18 bit |
| Number of Channels | 8 | 8 | 8 | 8 | 8 |
| Sampling Rate | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS | 200 kSPS |
| Input Voltage Range | ±10 V, ±5 V, ±2.5 V | ±10 V, ±5 V, ±2.5 V | ±10 V, ±5 V, ±2.5 V | ±10 V, ±5 V, ±2.5 V | ±10 V, ±5 V, ±2.5 V |
| Interface | SPI, DSP, Parallel | SPI, DSP, Parallel | SPI, DSP, Parallel | SPI, DSP, Parallel | SPI, DSP, Parallel |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
Key Differentiators
- 18-bit resolution provides higher dynamic range than 16-bit alternatives (vs AD7606BSTZ)
- Simultaneous sampling of 8 channels preserves phase relationships (vs AD7609BSTZ)
- Integrated analog front-end reduces external component count (vs AD7606BSTZ)
Design Notes
The AD7608BSTZ requires a single 5 V supply for both AVCC and DVCC. Use separate decoupling capacitors (e.g., 10 µF and 0.1 µF) close to each supply pin to minimize noise. The VDRIVE pin should be connected to the appropriate interface supply voltage (e.g., 3.3 V or 5 V) to ensure proper logic levels. According to the AD7608 datasheet, the supply current is typically [DATA_NEEDED: supply current] mA, so ensure the power supply can handle the total current.
Place the reference decoupling capacitor (REFCAP) close to the REFIN/REFOUT pin to ensure stable reference operation. Use a 10 µF low-ESR ceramic capacitor for best performance. The analog input traces should be kept short and shielded to minimize noise pickup. A solid ground plane is recommended, with separate analog and digital ground sections connected at a single point. According to the AD7608 datasheet, proper layout is essential for achieving specified performance.
Ensure the RANGE pin is set correctly for the desired input voltage range. Incorrect setting can lead to clipping or reduced accuracy. The CONVST A and CONVST B pins should be driven with clean, low-jitter signals to ensure accurate simultaneous sampling. Avoid floating unused digital inputs; tie them to appropriate logic levels. According to the AD7608 datasheet, the digital filter oversampling ratio should be selected based on the required noise performance and throughput.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free package.