Overview
The AD7779ACPZ, produced by Analog Devices Inc., is an 8-channel, 24-bit, simultaneous sampling analog-to-digital converter (ADC). This device is designed to provide high precision and flexibility, making it suitable for a variety of applications requiring multiple channel conversions. The AD7779 features ultralow input current, allowing direct sensor connection, and includes programmable gain stages to maximize the dynamic range of the signal chain. It supports both unipolar and true bipolar analog input signals and can be configured to accept true differential, pseudo differential, or single-ended signals.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 8 |
| Resolution | 24-bit |
| Sampling Rate | 16 kSPS |
| Input Range | Unipolar (0 V to VREF/GAIN), True Bipolar (±VREF/GAIN/2 V) |
| Analog Supply Voltage | 3.3 V or ±1.65 V |
| Reference Voltage | 1 V to 3.6 V |
| Programmable Gain | 1, 2, 4, 8 |
| Operating Temperature Range | -40°C to +105°C (operational up to +125°C) |
| Power Consumption (High Resolution Mode) | 10.75 mW per channel |
| Power Consumption (Low Power Mode) | 3.37 mW per channel |
| Package | 64-Lead LFCSP (9mm x 9mm w/ EP) |
Key Features
- Eight full Σ-Δ ADCs on chip with sinc3, low latency digital filters.
- Programmable gain stages (1, 2, 4, 8) to optimize dynamic range.
- Support for true differential, pseudo differential, or single-ended input signals.
- Internal 2.5 V reference and reference buffer with a typical temperature coefficient of 10 ppm/°C.
- Two modes of operation: high resolution mode and low power mode.
- SPI and data output interfaces for configuration and data transmission.
- 12-bit SAR ADC for diagnostics and validation without decommissioning Σ-Δ ADC channels.
- General-purpose inputs/outputs (GPIOs) for external multiplexer control.
Applications
The AD7779ACPZ is suitable for various applications requiring high precision and simultaneous sampling of multiple channels. These include:
- Industrial automation and control systems.
- Medical devices, such as patient monitoring systems and diagnostic equipment.
- Aerospace and defense systems requiring precise data acquisition.
- Automotive systems, including sensor data acquisition and control.
- Test and measurement equipment.
Q & A
- What is the resolution of the AD7779ACPZ ADC?
The AD7779ACPZ has a resolution of 24 bits. - How many channels does the AD7779ACPZ support?
The AD7779ACPZ supports 8 channels. - What is the sampling rate of the AD7779ACPZ?
The sampling rate of the AD7779ACPZ is 16 kSPS. - What are the supported input signal types for the AD7779ACPZ?
The AD7779ACPZ supports unipolar (0 V to VREF/GAIN) and true bipolar (±VREF/GAIN/2 V) analog input signals. - Can the AD7779ACPZ be configured to accept different types of input signals?
Yes, the AD7779ACPZ can be configured to accept true differential, pseudo differential, or single-ended input signals. - What are the power consumption modes of the AD7779ACPZ?
The AD7779ACPZ has two modes of operation: high resolution mode (10.75 mW per channel) and low power mode (3.37 mW per channel). - What is the operating temperature range of the AD7779ACPZ?
The operating temperature range of the AD7779ACPZ is -40°C to +105°C, although it is operational up to +125°C. - Does the AD7779ACPZ have an internal reference voltage?
Yes, the AD7779ACPZ includes a 2.5 V internal reference and reference buffer. - How is the AD7779ACPZ configured and controlled?
The AD7779ACPZ is configured and controlled through SPI and data output interfaces. - Is there a diagnostic ADC available on the AD7779ACPZ?
Yes, the AD7779ACPZ includes a 12-bit SAR ADC for diagnostics and validation.
