Overview
The AD7226KN, produced by Analog Devices Inc., is a quad 8-bit voltage-output digital-to-analog converter (DAC) integrated into a single monolithic chip. This device features four independent DACs, each with an output buffer amplifier and interface logic, eliminating the need for external trims to achieve full specified performance. The AD7226KN 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 on the same chip.
The device is designed for microprocessor compatibility, with a common 8-bit TTL/CMOS-compatible input port and separate on-chip latches for each DAC. The control logic is speed-compatible with most 8-bit microprocessors, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit | Conditions/Comments |
|---|---|---|---|
| Resolution | 8 Bits | ||
| Total Unadjusted Error | ±1 LSB max | VDD = 15 V ± 5%, VREF = 10 V | |
| Relative Accuracy | ±0.5 LSB max | ||
| Differential Nonlinearity | ±0.5 LSB max | ||
| Reference Voltage Range | 2 V to 12.5 V | Dual supplies | |
| Output Current Capability | Up to 5 mA | ||
| Supply Voltage Range | 14.25 V to 15.75 V | ||
| Package Types | 20-Lead PDIP, SOIC, SSOP, PLCC |
Key Features
- Four 8-Bit DACs with Output Amplifiers: Each DAC includes an output buffer amplifier capable of driving up to 5 mA of output current.
- Microprocessor Compatibility: The device has a common 8-bit TTL/CMOS-compatible input port and separate on-chip latches for each DAC, making it compatible with most 8-bit microprocessors.
- No User Trims Required: The amplifiers’ offsets are laser-trimmed during manufacture, eliminating the need for offset nulling.
- Single-Supply Operation: The voltage mode configuration allows the AD7226KN to operate from a single power supply rail.
- Compact Packaging: Available in skinny 20-lead packages such as DIP, SOIC, SSOP, and PLCC, reducing board space requirements.
- Extended Temperature Range Operation: Designed to operate over an extended temperature range, enhancing reliability in various environments.
Applications
- Process Control: Suitable for applications requiring precise control over analog outputs in industrial processes.
- Automatic Test Equipment: Used in test and measurement equipment where multiple DACs are needed.
- Automatic Calibration of Large System Parameters: Ideal for calibrating gain and offset in large systems.
Q & A
- What is the resolution of the AD7226KN DACs?
The AD7226KN features four 8-bit DACs.
- What is the maximum output current capability of each DAC?
Each DAC can drive up to 5 mA of output current.
- Does the AD7226KN require external trims for performance?
No, the AD7226KN does not require external trims to achieve full specified performance.
- What is the reference voltage range for the AD7226KN?
The reference voltage range is from 2 V to 12.5 V with dual supplies.
- Can the AD7226KN operate on a single power supply?
- What types of packages are available for the AD7226KN?
The AD7226KN is available in 20-lead PDIP, SOIC, SSOP, and PLCC packages.
- Is the AD7226KN compatible with microprocessors?
- What is the supply voltage range for the AD7226KN?
The supply voltage range is from 14.25 V to 15.75 V.
- What are some common applications of the AD7226KN?
- What fabrication process is used for the AD7226KN?
