Overview
The AD7228KNZ, produced by Analog Devices Inc., is a highly integrated octal 8-bit digital-to-analog converter (DAC) designed for high-performance applications. This device features eight 8-bit voltage mode DACs, each with an output buffer amplifier and interface logic, all on a single monolithic chip. The AD7228KNZ is fabricated using an all ion implanted, high speed, linear-compatible CMOS (LC2MOS) process, enabling the integration of high-speed digital logic and precision analog circuits. This design significantly reduces board space requirements and enhances system reliability.
Key Specifications
| Parameter | Specification |
|---|---|
| Number of DACs | 8 |
| Resolution | 8-bit |
| Output Mode | Voltage mode |
| Reference Voltage Range | 2 V to 10 V (dual supply), 10 V (single supply) |
| Output Buffer Amplifier Capability | 10 V across a 2 kΩ load |
| Input Port Compatibility | TTL/CMOS-compatible (5 V) |
| Address Inputs | A0, A1, A2 |
| Write Pulse Width | 95 ns |
| Package Types | 24-lead PDIP, 24-lead CerDIP, 24-lead SOIC, 28-lead PLCC |
Key Features
- Eight 8-bit DACs with output buffer amplifiers on a single chip, reducing board space and increasing reliability.
- Operates with single or dual supplies, with specified performance for reference voltages from 2 V to 10 V.
- No external trims required for full specified performance.
- Microprocessor-compatible interface with a common 8-bit data bus and individual DAC latches.
- Speed compatible with most 8-bit microprocessors.
- Available in various packages including PDIP, CerDIP, SOIC, and PLCC.
Applications
The AD7228KNZ is suitable for a wide range of applications requiring multiple DACs, such as industrial control systems, medical devices, audio and video equipment, and any system needing precise voltage output control. Its compact design and high reliability make it an ideal choice for space-constrained and high-performance environments.
Q & A
- What is the resolution of each DAC in the AD7228KNZ?
The resolution of each DAC is 8-bit. - How many DACs are integrated into the AD7228KNZ?
The AD7228KNZ contains eight 8-bit DACs. - What is the reference voltage range for the AD7228KNZ?
The reference voltage range is from 2 V to 10 V for dual supply operation and 10 V for single supply operation. - What types of packages are available for the AD7228KNZ?
The device is available in 24-lead PDIP, 24-lead CerDIP, 24-lead SOIC, and 28-lead PLCC packages. - Is the AD7228KNZ compatible with microprocessors?
Yes, the AD7228KNZ is microprocessor-compatible with a common 8-bit data bus and individual DAC latches. - What is the output capability of the buffer amplifiers?
Each output buffer amplifier can develop 10 V across a 2 kΩ load. - Does the AD7228KNZ require external trims?
No, the AD7228KNZ does not require external trims to achieve full specified performance. - What process is used to fabricate the AD7228KNZ?
The AD7228KNZ is fabricated using an all ion implanted, high speed, linear-compatible CMOS (LC2MOS) process. - What are some typical applications for the AD7228KNZ?
Typical applications include industrial control systems, medical devices, audio and video equipment, and other systems requiring precise voltage output control. - How are the data latches controlled in the AD7228KNZ?
Data is transferred into the data latches through a common 8-bit, TTL/CMOS-compatible input port, and the A0, A1, and A2 address inputs determine which latch is loaded when WR goes low.
