AD7768-4BSTZ - 24-Bit 4-Ch Simultaneous ADC | Analog Devices
MPN: AD7768-4BSTZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.8 | $168.00 |
| 100 | $14.2 | $1,420.00 |
| 500 | $12.9 | $6,450.00 |
| 1,000 | $11.75 | $11,750.00 |
Drop-in alternatives for AD7768-4BSTZ 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:
AD7768-4BSTZ-RL
β Drop-Inβ In Stock
$11.85 / Unit
View Datasheet βAD7768BSTZ
β‘ Same Packageπ Reference alternative (not in catalog)
AD7779
β‘ Same Packageπ Reference alternative (not in catalog)
AD7768-4BSTZ Maximum Ratings & Electrical Characteristics
| Resolution | 24 bit |
| Number of Channels | 4 |
| Sampling Rate | 256 kSPS |
| Input Type | Differential, Single-Ended |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| Input Bandwidth | 110.8 kHz |
| Power Modes | Fast, Median, Low Power |
| Analog Supply Voltage | 2.5 V |
| Digital Supply Voltage | 2.5 V to 3.3 V |
| Operating Temperature Range | -40Β°C to +105Β°C |
| Package | 64-LQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Pass-Band Ripple | Β±0.005 dB |
| Stop-Band Attenuation | 105 dB at Nyquist |
| RoHS Status | Compliant |
AD7768-4BSTZ Pin Configuration
| Pin 1 | AVDD1 β Analog power supply 2.5V |
| Pin 2 | AVSS1 β Analog ground |
| Pin 3 | AIN0+ β Positive analog input channel 0 |
| Pin 4 | AIN0- β Negative analog input channel 0 |
| Pin 5 | AIN1+ β Positive analog input channel 1 |
| Pin 6 | AIN1- β Negative analog input channel 1 |
| Pin 7 | AIN2+ β Positive analog input channel 2 |
| Pin 8 | AIN2- β Negative analog input channel 2 |
| Pin 9 | AIN3+ β Positive analog input channel 3 |
| Pin 10 | AIN3- β Negative analog input channel 3 |
| Pin 11 | REF+ β Positive reference input |
| Pin 12 | REF- β Negative reference input |
| Pin 13 | DVDD β Digital power supply 2.5V to 3.3V |
| Pin 14 | DGND β Digital ground |
| Pin 15 | SCLK β Serial clock input |
| Pin 16 | SDI β Serial data input |
| Pin 17 | SDO β Serial data output |
| Pin 18 | CS β Chip select (active low) |
| Pin 19 | DRDY β Data ready output |
| Pin 20 | RESET β Reset input (active low) |
| Pin 21 | SYNC_IN β Synchronization input |
| Pin 22 | MCLK β Master clock input |
| Pin 23 | PWDN β Power down input |
| Pin 24 | GPIO0 β General purpose I/O |
| Pin 25 | GPIO1 β General purpose I/O |
| Pin 26 | GPIO2 β General purpose I/O |
| Pin 27 | GPIO3 β General purpose I/O |
| Pin 28 | AVDD2 β Analog power supply 2.5V |
| Pin 29 | AVSS2 β Analog ground |
| Pin 30 | VDRIVE β Digital interface supply |
| Pin 31 | DVDD2 β Digital power supply |
| Pin 32 | DGND2 β Digital ground |
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
AD7768-4BSTZ is suitable for 6 applications: Power Line Monitoring, Vibration Analysis, Motor Control, Multi-Phase Energy Metering, Audio Test and Measurement, Data Acquisition Systems.
Power Line Monitoring
The AD7768-4BSTZ is ideal for power line monitoring systems that require simultaneous sampling of voltage and current across multiple phases. Its 24-bit resolution and 256 kSPS data rate enable accurate measurement of harmonics and power quality. The device's three power modes allow optimization for low power consumption in battery-powered monitors, while the wideband filter ensures minimal phase error between channels. With a 110.8 kHz input bandwidth, it captures high-frequency transients essential for fault detection. The SPI interface simplifies data transfer to a host processor, and the industrial temperature range supports outdoor deployment.
Recommended
Vibration Analysis
In vibration analysis, the AD7768-4BSTZ provides simultaneous sampling of multiple accelerometer signals, ensuring accurate phase relationships for modal analysis. Its 24-bit resolution captures fine vibration details, and the 256 kSPS data rate supports high-frequency vibration monitoring. The low power modes are beneficial for portable diagnostic equipment. The device's high SNR and low distortion enable precise detection of bearing faults and imbalance. The SPI output allows easy interfacing with FPGAs or DSPs for real-time processing. The compact 64-LQFP package fits space-constrained designs.
Recommended
Motor Control
The AD7768-4BSTZ is well-suited for motor control applications requiring simultaneous sampling of phase currents and voltages. Its 24-bit resolution and 256 kSPS data rate enable precise current sensing for field-oriented control. The device's low power consumption is advantageous in inverter drives. The wideband input filter reduces aliasing, and the SPI interface provides fast data transfer to a microcontroller. The industrial temperature range ensures reliable operation in harsh environments. The simultaneous sampling capability ensures accurate torque and speed control by aligning current and voltage measurements.
Recommended
Multi-Phase Energy Metering
For multi-phase energy metering, the AD7768-4BSTZ offers simultaneous sampling of voltage and current from multiple phases, ensuring accurate power and energy calculations. Its 24-bit resolution provides high accuracy over a wide dynamic range, and the 256 kSPS data rate supports harmonic analysis. The device's three power modes allow metering applications to balance performance and power consumption. The SPI interface enables easy integration with metering SoCs. The device's low offset and gain drift ensure long-term stability, critical for revenue-grade metering. The compact package is suitable for smart meter designs.
Recommended
Audio Test and Measurement
The AD7768-4BSTZ can be used in audio test equipment for simultaneous measurement of multiple audio channels. Its 24-bit resolution and 256 kSPS data rate capture high-frequency audio signals with low distortion. The device's low noise performance is essential for accurate THD measurements. The wideband filter ensures flat response across the audio band. The SPI interface allows easy integration with audio analyzers. The device's power modes enable portable test instruments to conserve battery life. The industrial temperature range supports use in production test environments.
Recommended
Data Acquisition Systems
The AD7768-4BSTZ is a key component in high-performance data acquisition systems (DAQ) requiring simultaneous sampling of multiple analog signals. Its 24-bit resolution and 256 kSPS data rate provide high accuracy for industrial and scientific measurements. The device's three power modes allow DAQ systems to optimize for speed or power. The SPI interface simplifies connection to FPGAs or microcontrollers. The wideband filter reduces aliasing, and the industrial temperature range ensures reliability in harsh environments. The compact package enables dense channel density in multi-channel DAQ modules.
Recommended
Recommended Products Summary
Engineering reference data for AD7768-4BSTZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7768-4BSTZ-RL | AD7768BSTZ | ADS1274 | ADS1174 | AD7779 |
|---|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | HTQFP-64 - different | HTQFP-64 - different | LQFP-64 - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Analog Devices |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 16 bit | 24 bit |
| Number of Channels | 4 | 4 | 8 | 4 | 4 | 8 |
| Max Sampling Rate | 256 kSPS | 256 kSPS | 256 kSPS | 144 kSPS | 52 kSPS | 128 kSPS |
| Input Bandwidth | 110.8 kHz | 110.8 kHz | 110.8 kHz | 62 kHz | 23.4 kHz | 50 kHz |
| Power Modes | 3 (fast, median, low) | 3 | 3 | 2 (high-speed, high-resolution) | 2 | 3 |
| Data Interface | SPI | SPI | SPI | SPI | SPI | SPI |
Key Differentiators
- Three power modes for flexibility (vs ADS1274)
- Higher input bandwidth (vs ADS1274)
- Same package as 8-channel version (vs AD7768BSTZ)
Design Notes
The AD7768-4BSTZ requires a clean 2.5V analog supply and a 2.5V to 3.3V digital supply. Use low-dropout regulators (LDOs) with low noise, such as the ADP151, to power AVDD and DVDD. Decouple each supply pin with a 10uF and 0.1uF capacitor placed close to the pins. The VDRIVE pin should be connected to the same supply as the host interface to ensure proper logic levels.
For optimal performance, use a solid ground plane and separate analog and digital ground planes, connecting them at a single point near the ADC. Route analog inputs away from digital traces to minimize coupling. Place the reference decoupling capacitors close to the REF+ and REF- pins. Use a low-jitter master clock source, such as a crystal oscillator, to achieve the specified SNR.
Ensure the master clock frequency is within the specified range (typically 32.768 MHz for 256 kSPS). Incorrect clock frequency will result in incorrect output data rates. Also, avoid floating unused analog inputs; tie them to AVSS or a common-mode voltage. The RESET pin must be held low for at least 10ns after power-up to initialize the device properly.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
