Overview
The MX7821KN+ is a high-speed, microprocessor-compatible (μP), 8-bit analog-to-digital converter (ADC) produced by Analog Devices Inc./Maxim Integrated. It serves as a plug-in upgrade for the industry-standard 7820, offering enhanced performance with a conversion time of 660ns compared to the 7820's 1.36μs. This ADC features a track-and-hold function, supporting the digitization of signals up to 100kHz, and is designed for both static and dynamic operations. The MX7821KN+ is compatible with microprocessors, allowing direct connection to a μP data bus or system input port without external interface logic.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 8-bit |
| Conversion Time | 660ns |
| Sampling Rate | 500 kS/s |
| Input Type | Single-Ended |
| Architecture | Half-Flash |
| Data Interface | Parallel |
| Configuration | S/H-ADC (Sample and Hold ADC) |
| Package | Plastic Dual-In-Line, Narrow (0.3in) |
| Height | 4.45 mm |
| Length | 26.54 mm |
Key Features
- High-Speed Conversion: The MX7821KN+ offers a conversion time of 660ns, significantly faster than its predecessor.
- Microprocessor Compatibility: The ADC can be directly connected to a microprocessor data bus or system input port without the need for external interface logic.
- Track-and-Hold Function: Capable of digitizing signals up to 100kHz.
- Dual Power Supplies and Bipolar Inputs: Supported by the VSS pin, enabling ratiometric operation and bipolar analog inputs.
- Latched, Three-State Buffered Outputs: Allows for direct connection to a μP data bus or system input port.
- Overflow Output for Cascading: Enables the cascading of devices to achieve higher resolution.
Applications
The MX7821KN+ is suitable for various high-speed data acquisition and processing applications, including:
- Industrial automation and control systems.
- Medical devices requiring fast and accurate analog-to-digital conversion.
- Aerospace and defense systems where high-speed data conversion is critical.
- Automotive systems, particularly those involving real-time data processing.
- Scientific instruments and test equipment.
Q & A
- What is the conversion time of the MX7821KN+?
The conversion time of the MX7821KN+ is 660ns. - How does the MX7821KN+ compare to the 7820 in terms of conversion time?
The MX7821KN+ has a conversion time of 660ns, which is significantly faster than the 1.36μs of the 7820. - What is the sampling rate of the MX7821KN+?
The sampling rate of the MX7821KN+ is 500 kS/s. - What type of input does the MX7821KN+ support?
The MX7821KN+ supports single-ended inputs. - Does the MX7821KN+ require external interface logic for microprocessor connection?
No, the MX7821KN+ does not require external interface logic for direct connection to a microprocessor data bus or system input port. - What is the purpose of the VSS pin on the MX7821KN+?
The VSS pin supports dual power supplies and bipolar analog inputs, enabling ratiometric operation. - Can the MX7821KN+ be cascaded for higher resolution?
Yes, the MX7821KN+ has an overflow output that allows for cascading devices to achieve higher resolution. - What is the track-and-hold capability of the MX7821KN+?
The MX7821KN+ can digitize signals up to 100kHz. - In what package is the MX7821KN+ available?
The MX7821KN+ is available in a Plastic Dual-In-Line, Narrow (0.3in) package. - What are some typical applications of the MX7821KN+?
The MX7821KN+ is used in industrial automation, medical devices, aerospace and defense systems, automotive systems, and scientific instruments.
