Overview
The AD7226KNZ, produced by Analog Devices Inc., is a quad 8-bit voltage-output digital-to-analog converter (DAC) integrated on a single monolithic chip. This device features four 8-bit DACs, each with an output buffer amplifier and interface logic, eliminating the need for external trims to achieve full specified performance. The AD7226KNZ is fabricated using an all ion-implanted high speed Linear Compatible CMOS (LC2MOS) process, allowing for the integration of high-speed digital logic and precision analog circuits on the same chip.
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 | ||
| Output Current | Up to 5 mA | Per DAC | |
| Reference Voltage Range | 2 V to 12.5 V | Dual supplies | |
| Single Supply Operation | 10 V reference | ||
| Package Types | 20-Lead PDIP, SOIC, SSOP, PLCC, CerDIP |
Key Features
- DAC-to-DAC Matching: Precise matching and tracking between the DACs due to fabrication on the same chip.
- Single-Supply Operation: The voltage mode configuration allows operation from a single power supply rail.
- Microprocessor Compatibility: Common 8-bit data bus with individual DAC latches, compatible with most 8-bit microprocessors.
- Small Size: Combines four DACs, four op amps, and interface logic into a compact 20-pin package, reducing board space requirements.
- No User Trims: Full specified performance is achieved without the need for external trims.
- Extended Temperature Range Operation: Suitable for a wide range of operating temperatures.
Applications
- Process Control: Used in systems that require precise analog output control.
- Automatic Test Equipment: Ideal for calibration and testing in automated systems.
- Automatic Calibration of Large System Parameters: Such as gain and offset adjustments in complex systems.
Q & A
- What is the resolution of the AD7226KNZ DAC?
The AD7226KNZ has a resolution of 8 bits.
- How many DACs are integrated on the AD7226KNZ chip?
The AD7226KNZ contains four 8-bit DACs.
- What is the output current capability of each DAC?
Each DAC can drive up to 5 mA of output current.
- What is the reference voltage range for the AD7226KNZ?
The reference voltage range is from 2 V to 12.5 V with dual supplies, and single supply operation is possible at a reference of 10 V.
- Is the AD7226KNZ compatible with microprocessors?
- What are the package types available for the AD7226KNZ?
The AD7226KNZ is available in 20-Lead PDIP, SOIC, SSOP, PLCC, and CerDIP packages.
- Does the AD7226KNZ require external trims for full performance?
No, full specified performance is achieved without the need for external trims.
- What is the fabrication process used for the AD7226KNZ?
The AD7226KNZ is fabricated using an all ion-implanted high speed Linear Compatible CMOS (LC2MOS) process.
- What are some typical applications of the AD7226KNZ?
Typical applications include process control, automatic test equipment, and automatic calibration of large system parameters.
- What is the significance of DAC-to-DAC matching in the AD7226KNZ?
The precise matching and tracking between the DACs are inherent due to their fabrication on the same chip, ensuring consistent performance.
