Overview
The AD7226KRZ, produced by Analog Devices Inc., is a quad 8-bit digital-to-analog converter (DAC) integrated circuit. This device combines four 8-bit voltage-output DACs, each with an output buffer amplifier and interface logic, on a single monolithic chip. The AD7226KRZ 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 ensures precise matching and tracking between the DACs, as they are fabricated on the same chip simultaneously. The device is available in various packages, including 20-lead DIP, SOIC, SSOP, and PLCC, making it versatile for different application needs.
Key Specifications
| Parameter | Value | 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 | |
| Settling Time | 3 μs | |
| Reference Voltage Range | 2 V to 12.5 V | Dual supplies; 10 V for single supply |
| Supply Voltage | 15 V | VDD = 11.4 V to 16.5 V, VSS = –5 V ± 10% |
| Output Current | Up to 5 mA | Per DAC output buffer amplifier |
Key Features
- Four 8-bit DACs with output buffer amplifiers
- No external trims required for full specified performance
- Microprocessor-compatible interface with a common 8-bit TTL/CMOS input port
- Single-supply operation possible with a reference voltage of 10 V
- Precise DAC-to-DAC matching due to fabrication on the same chip
- Compact 20-pin package options (DIP, SOIC, SSOP, PLCC)
- Extended temperature range operation
Applications
- Process Control
- Automatic Test Equipment
- Automatic Calibration of large system parameters (e.g., gain/offset)
Q & A
- What is the resolution of the AD7226KRZ DACs?
The AD7226KRZ has a resolution of 8 bits for each of its four DACs.
- What is the typical settling time for the AD7226KRZ?
The settling time for the AD7226KRZ is typically 3 μs.
- Can the AD7226KRZ operate on a single power supply?
- What is the output current capability of each DAC output buffer amplifier?
Each DAC output buffer amplifier can drive up to 5 mA of output current.
- What are the package options available for the AD7226KRZ?
The AD7226KRZ is available in 20-lead DIP, SOIC, SSOP, and PLCC packages.
- Does the AD7226KRZ require external trims for full performance?
No, the AD7226KRZ does not require external trims to achieve full specified performance.
- What is the reference voltage range for the AD7226KRZ?
The reference voltage range for the AD7226KRZ is from 2 V to 12.5 V for dual supplies and 10 V for single supply operation.
- Is the AD7226KRZ compatible with microprocessors?
- What are some typical applications of the AD7226KRZ?
The AD7226KRZ is typically used in process control, automatic test equipment, and automatic calibration of large system parameters.
- What is the fabrication process used for the AD7226KRZ?
The AD7226KRZ is fabricated using an all ion-implanted high-speed Linear Compatible CMOS (LC2MOS) process.
