Overview
The AD7228ABR, produced by Analog Devices Inc., is a highly integrated digital-to-analog converter (DAC) that features eight 8-bit voltage-mode DACs with output buffer amplifiers and interface logic on a single monolithic chip. This device is designed to minimize board space requirements and enhance system reliability by consolidating multiple converters into one package. The AD7228ABR supports both single and dual supply operations, making it versatile for various applications. It is fabricated using an all ion-implanted, high-speed, Linear Compatible CMOS (LC2MOS) process, which integrates high-speed digital logic and precision analog circuits effectively.
Key Specifications
| Parameter | Value |
|---|---|
| Number of D/A Converters | 8 |
| Number of Bits | 8 |
| Settling Time | 5 µs, 7 µs |
| Output Type | Voltage - Buffered |
| Differential Output | No |
| Data Interface | Parallel |
| Reference Type | External |
| Voltage - Supply, Analog | 10.8 V ~ 16.5 V, ±5 V |
| 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 buffer amplifiers on a single chip, reducing board space and increasing reliability.
- Single or dual supply operation, with specified performance for input reference voltages from +2 V to +10 V.
- Microprocessor compatibility with a common 8-bit data bus and individual DAC latches, ensuring easy interface with most 8-bit microprocessors.
- No external trims required to achieve full specified performance.
- Output buffer amplifiers capable of developing +10 V across a 2 kΩ load.
- Fabricated on an all ion-implanted, high-speed, Linear Compatible CMOS (LC2MOS) process.
Applications
- Industrial control systems requiring multiple analog outputs.
- Aerospace and defense systems where space and reliability are critical.
- Medical devices that need precise and reliable analog output signals.
- Automotive systems for various control and monitoring functions.
- Any system requiring multiple 8-bit DACs with high precision and reliability.
Q & A
- What is the AD7228ABR?
The AD7228ABR is an octal 8-bit digital-to-analog converter (DAC) with output buffer amplifiers and interface logic on a single monolithic chip.
- How many DACs does the AD7228ABR contain?
The AD7228ABR contains eight 8-bit DACs.
- What are the supply voltage options for the AD7228ABR?
The AD7228ABR can operate with single supplies (+5 V, +12 V, or +15 V) or dual supplies.
- Is the AD7228ABR compatible with microprocessors?
Yes, the AD7228ABR has a common 8-bit data bus and individual DAC latches, making it compatible with most 8-bit microprocessors.
- What is the settling time of the AD7228ABR?
The settling time of the AD7228ABR is 5 µs or 7 µs.
- Does the AD7228ABR require external trims?
No, the AD7228ABR does not require external trims to achieve full specified performance.
- What is the output capability of the buffer amplifiers in the AD7228ABR?
Each output buffer amplifier can develop +10 V across a 2 kΩ load.
- What process is the AD7228ABR fabricated on?
The AD7228ABR is fabricated on an all ion-implanted, high-speed, Linear Compatible CMOS (LC2MOS) process.
- What are some common applications of the AD7228ABR?
The AD7228ABR is commonly used in industrial control systems, aerospace and defense systems, medical devices, and automotive systems.
- What is the package type of the AD7228ABR?
The AD7228ABR is available in a 24-SOIC package.
