The AD7775 is a 24-bit, 8-channel simultaneous sampling ADC (Analog-to-Digital Converter) from Analog Devices (ADI). It is specifically designed for high-density, high-bandwidth data acquisition applications. It features excellent AC and DC performance, making it suitable for a wide range of applications requiring precise measurement.

Applications

• Condition Monitoring
• Industrial IoT
• Vibration Analysis
• Audio Testing
• Seismic Instrumentation
• Power Quality Monitoring
• Sonar

Features

• 8 simultaneous sampling channels
• 24-bit resolution
• 94 dB dynamic range
• −117 dB THD
• Bandwidth: 22 kHz
• Power: 93 mW
• On-chip digital filtering options
• SPI compatible serial interface
• Small footprint package

Benefits

• High accuracy: 24-bit resolution enables precise measurement of small signals.
• Simultaneous sampling: Allows accurate capture of dynamic signals across multiple channels without skew.
• Excellent dynamic range: Captures both large and small signals accurately.
• Low distortion: Ensures high signal fidelity.
• Flexible digital filtering: Enables optimization for specific applications.
• Small form factor: Allows for high-density channel integration.
• Simplified interface: SPI interface simplifies connection to processors and FPGAs.

Additional Details

The AD7775 incorporates a precision analog front-end to allow wide bandwidth signals to be directly sampled with minimal antialiasing requirements. The input full-scale range can be configured to ±10 V, ±5 V, or ±2.5 V. Each channel features a programmable gain stage allowing for optimal signal conditioning. The device features selectable digital filters, including a sinc filter and a digital FIR filter, enabling trade-offs between bandwidth and noise. The AD7775 communicates using a standard SPI interface and is available in a compact package for space-constrained applications. The AD7775 delivers a balance of high performance, power efficiency, and integration, making it ideal for demanding data acquisition systems. The device requires an external clock source.