Overview
The AD7828CQ is a high-speed, 8-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the AD7824/AD7828 family, which offers a choice between 4-channel (AD7824) and 8-channel (AD7828) multiplexed analog inputs. The AD7828CQ is specifically designed with eight analog input channels, making it a cost-effective and space-saving solution for multichannel ADC systems.
The device operates on a single 5 V supply and features a built-in track-and-hold function, enabling it to digitize full-scale signals up to 10 kHz with a slew rate of 157 mV/µs. The half-flash conversion technique used in the AD7828CQ provides a fast conversion rate of 2.5 µs per channel, and it does not require an external clock signal for operation.
Key Specifications
| Specification | Value |
|---|---|
| Number of Analog Input Channels | 8 |
| Resolution | 8-bit |
| Conversion Rate | 2.5 µs per channel |
| Sampling Frequency | Up to 50 kHz |
| Analog Input Range | 0 V to 5 V |
| Supply Voltage | Single 5 V |
| Power Dissipation | Typically 40 mW |
| Operating Temperature Range | –40°C to +85°C |
| Package Type | 28-lead DIP, 28-terminal surface mount |
Key Features
- Multi-Channel Input: The AD7828CQ features an 8-channel input multiplexer, providing a cost-effective and space-saving solution for multichannel ADC systems.
- Fast Conversion Rate: The device has a fast conversion rate of 2.5 µs per channel, allowing for high-speed data acquisition.
- Built-In Track-and-Hold Function: Capable of handling signals up to 10 kHz with a slew rate of 157 mV/µs, eliminating the need for an external sample-and-hold circuit.
- Simple Microprocessor Interface: Uses standard Chip Select (CS) and Read (RD) signals to initiate conversion and read data, with no external clock signal required.
- Low Power Consumption: Operates with low power dissipation of typically 40 mW.
- Tight Error Specification: Features a tight total unadjusted error specification and good channel-to-channel matching, reducing the need for user trims.
Applications
The AD7828CQ is suitable for a variety of applications that require high-speed, multi-channel analog-to-digital conversion. These include:
- Data Acquisition Systems: Ideal for systems that need to capture multiple analog signals simultaneously.
- Industrial Control Systems: Useful in control systems where multiple sensors need to be monitored in real-time.
- Medical Devices: Can be used in medical equipment that requires the conversion of multiple analog signals, such as in patient monitoring systems.
- Aerospace and Defense: Suitable for applications requiring high-speed, low-power ADCs in harsh environments.
Q & A
- What is the number of analog input channels on the AD7828CQ?
The AD7828CQ has 8 analog input channels.
- What is the resolution of the AD7828CQ?
The AD7828CQ has an 8-bit resolution.
- What is the conversion rate of the AD7828CQ?
The conversion rate is 2.5 µs per channel.
- Does the AD7828CQ require an external clock signal?
No, the AD7828CQ does not require an external clock signal for operation.
- What is the operating supply voltage for the AD7828CQ?
The AD7828CQ operates on a single 5 V supply.
- What is the typical power dissipation of the AD7828CQ?
The typical power dissipation is 40 mW.
- What is the maximum sampling frequency for the AD7828CQ?
The maximum sampling frequency is up to 50 kHz.
- What is the slew rate that the AD7828CQ can handle?
The AD7828CQ can handle signals with a slew rate of up to 157 mV/µs.
- What types of packages are available for the AD7828CQ?
The AD7828CQ is available in 28-lead DIP and 28-terminal surface mount packages.
- What is the operating temperature range for the AD7828CQ?
The operating temperature range is –40°C to +85°C.
