Overview
The AD7768-4BSTZ-RL7 is a 4-channel, 24-bit, simultaneous sampling analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD7768/AD7768-4 family, known for its high precision and flexibility in both AC and DC measurements. The AD7768-4 features a sigma-delta (Σ-Δ) modulator and digital filter per channel, enabling synchronized sampling of signals. It achieves a dynamic range of 108 dB at a maximum input bandwidth of 110.8 kHz, making it suitable for a wide range of applications requiring high accuracy and performance.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Resolution | 24-bit | |||
| Sampling Rate | 32 kSPS | 128 kSPS | 256 kSPS | kSPS |
| Input Bandwidth | 13.8 kHz | 55.4 kHz | 110.8 kHz | kHz |
| Integral Nonlinearity (INL) | ±2 ppm | ppm | ||
| Offset Error | ±50 μV | μV | ||
| Gain Error | ±30 ppm | ppm | ||
| Power Consumption (per channel) | 9.375 mW | 27.5 mW | 51.5 mW | mW |
| Package | 64-Lead LQFP (10mm x 10mm) | |||
| Operating Temperature | -40°C | +105°C | °C |
Key Features
- Simultaneous Sampling: The AD7768-4 allows for simultaneous sampling of all four channels, ensuring synchronized measurements.
- Power Scaling: The device offers three power modes (fast, median, and low power) to trade off input bandwidth, output data rate, and power dissipation, optimizing for noise targets and power consumption.
- Digital Filtering: Extensive digital filtering capabilities, including a wideband linear phase filter and a sinc5 filter, provide a flat pass band and sharp roll-off.
- High Precision: Achieves 108 dB dynamic range, ±2 ppm integral nonlinearity (INL), ±50 μV offset error, and ±30 ppm gain error.
- Flexibility in Signal Conditioning: Supports various filter configurations and can drive single-ended, fully differential, or single-ended to differential signals.
- Evaluation Kit: The EVAL-AD7768-4FMCZ evaluation board is available for testing and evaluating the ADC's features.
Applications
- Industrial Automation: Suitable for precision measurement and control systems.
- Medical Devices: Used in medical equipment requiring high accuracy and low noise.
- Aerospace and Defense: Applicable in systems needing simultaneous sampling and high dynamic range.
- Test and Measurement Equipment: Ideal for multichannel data acquisition systems.
- Power Monitoring and Control Systems: Useful in applications requiring precise measurement of AC and DC signals.
Q & A
- What is the resolution of the AD7768-4?
The AD7768-4 has a 24-bit resolution.
- What are the different power modes available on the AD7768-4?
The device has three power modes: fast mode, median mode, and low power mode.
- What is the maximum sampling rate of the AD7768-4?
The maximum sampling rate is 256 kSPS.
- What is the input bandwidth in fast mode?
The input bandwidth in fast mode is 110.8 kHz.
- What type of digital filters does the AD7768-4 offer?
The device offers a wideband linear phase filter and a sinc5 filter.
- How many channels does the AD7768-4 support?
The AD7768-4 supports 4 channels.
- What is the typical integral nonlinearity (INL) of the AD7768-4?
The typical INL is ±2 ppm.
- What is the operating temperature range of the AD7768-4?
The operating temperature range is from -40°C to +105°C.
- Is there an evaluation kit available for the AD7768-4?
- What package type is the AD7768-4 available in?
The device is available in a 64-Lead LQFP (10mm x 10mm) package.
