Overview
The AD7226BQ, manufactured by Analog Devices Inc., is a quad 8-bit digital-to-analog converter (DAC) integrated into a single monolithic chip. This device features four 8-bit voltage-output DACs, each with an output buffer amplifier and interface logic. The AD7226BQ 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. No external trims are required to achieve full specified performance, and the device is compatible with most 8-bit microprocessors.
Key Specifications
| Parameter | Unit | Conditions/Comments |
|---|---|---|
| Number of Bits | 8 | - |
| Number of D/A Converters | 4 | - |
| Resolution | 8 Bits | - |
| Total Unadjusted Error | ±1 LSB max | VDD = 15 V ± 5%, VREF = 10 V |
| Relative Accuracy | ±0.5 LSB max | - |
| Output Current | Up to 5 mA | - |
| Reference Voltage Range | 2 V to 12.5 V | Dual supplies |
| Single Supply Operation | 10 V | - |
| Package Types | 20-Lead DIP, SOIC, SSOP, PLCC | - |
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.
- Compact Design: Combining four DACs, four op amps, and interface logic into a 20-pin package reduces board space requirements and increases reliability.
- No User Trims: No external trims are required to achieve full specified performance.
- Extended Temperature Range Operation: Specified performance over a wide temperature range.
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 AD7226BQ DACs?
The AD7226BQ features four 8-bit DACs.
- How many DACs are integrated into the AD7226BQ?
The device includes four 8-bit DACs.
- What is the output current capability of each DAC's buffer amplifier?
Each buffer amplifier can drive up to 5 mA of output current.
- What is the reference voltage range for the AD7226BQ?
The reference voltage range is from 2 V to 12.5 V with dual supplies, and 10 V for single supply operation.
- Is the AD7226BQ compatible with single supply operation?
- What types of packages are available for the AD7226BQ?
The device is available in 20-Lead DIP, SOIC, SSOP, and PLCC packages.
- Does the AD7226BQ require external trims for performance?
No, external trims are not required to achieve full specified performance.
- Is the AD7226BQ compatible with microprocessors?
- What are some common applications of the AD7226BQ?
- What fabrication process is used for the AD7226BQ?
