Overview
The AD7228KRZ-REEL, produced by Analog Devices Inc., is an octal 8-bit digital-to-analog converter (DAC) integrated circuit. This device features eight 8-bit voltage mode DACs, each with an output buffer amplifier and individual latches, all on a single monolithic chip. The AD7228KRZ-REEL is designed to integrate high-speed digital logic and precision analog circuits, making it suitable for a variety of applications requiring multiple DACs.
The device operates with either single or dual supplies, offering flexibility in system design. It is compatible with most 8-bit microprocessors and does not require external trims to achieve full specified performance. The package is available in a 24-lead SOIC, which optimizes board layout by placing all analog inputs and outputs on one side and digital inputs on the other.
Key Specifications
| Specification | Value | Notes |
|---|---|---|
| Number of Bits | 8 | |
| Number of D/A Converters | 8 | |
| Settling Time | 5µs, 7µs | |
| Output Type | Voltage - Buffered | |
| Differential Output | No | |
| Data Interface | Parallel | |
| Reference Type | External | |
| Voltage - Supply, Analog | 10.8 V ~ 16.5 V, -5V | Dual supply operation |
| Voltage - Supply, Digital | 13.5 V ~ 16.5 V | |
| INL/DNL (LSB) | ±1 (Max), ±1 (Max) | |
| Architecture | R-2R | |
| Package | 24-SOIC (0.295", 7.50mm Width) |
Key Features
- Eight 8-bit DACs with Output Buffers: Each DAC has an output buffer amplifier, allowing for direct connection to loads.
- Single or Dual Supply Operation: The device can operate with either a single supply (up to 15 V) or dual supplies (up to ±5 V), enhancing flexibility in system design.
- Microprocessor Compatibility: The AD7228KRZ-REEL is compatible with most 8-bit microprocessors, featuring a common 8-bit data bus and individual DAC latches.
- No External Trims Required: The device does not require external trims to achieve full specified performance.
- Compact Packaging: Available in a 24-lead SOIC package, optimizing board layout with all analog inputs and outputs on one side and digital inputs on the other.
- High-Speed CMOS Process: Fabricated on an all ion-implanted, high-speed, Linear Compatible CMOS (LC2MOS) process, integrating high-speed digital logic and precision analog circuits.
Applications
- Industrial Control Systems: Suitable for applications requiring multiple DACs to control various analog outputs.
- Medical Devices: Can be used in medical equipment where precise analog output control is necessary.
- Aerospace and Defense: Applicable in systems that require reliable and compact DAC solutions.
- Automotive Systems: Useful in automotive control systems that need multiple analog outputs.
- Test and Measurement Equipment: Ideal for equipment that requires precise and stable analog output signals.
Q & A
- What is the number of bits and number of DACs in the AD7228KRZ-REEL?
The AD7228KRZ-REEL features eight 8-bit DACs.
- Can the AD7228KRZ-REEL operate with a single supply or dual supplies?
Yes, it can operate with either a single supply (up to 15 V) or dual supplies (up to ±5 V).
- Is the AD7228KRZ-REEL compatible with microprocessors?
Yes, it is compatible with most 8-bit microprocessors.
- Does the AD7228KRZ-REEL require external trims for full performance?
No, it does not require external trims to achieve full specified performance.
- What is the package type of the AD7228KRZ-REEL?
The device is available in a 24-lead SOIC package.
- What is the settling time of the AD7228KRZ-REEL?
The settling time is 5µs and 7µs.
- What type of architecture does the AD7228KRZ-REEL use?
The device uses an R-2R architecture.
- What is the input impedance at the VREF pin?
The input impedance at the VREF pin is code-dependent and can vary from 2 kΩ to infinity.
- Is a decoupling capacitor recommended for the VREF input?
Yes, a 0.1 µF (or greater) decoupling capacitor is recommended for dc applications.
- What are some typical applications of the AD7228KRZ-REEL?
Typical applications include industrial control systems, medical devices, aerospace and defense, automotive systems, and test and measurement equipment.
