Overview
The AD7228ACR, produced by Analog Devices Inc., is a highly integrated digital-to-analog converter (DAC) that features eight 8-bit voltage-mode DACs on a single monolithic chip. This device includes output buffer amplifiers and interface logic, making it a versatile component for various applications. The AD7228ACR 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. It is designed to operate with either single or dual supplies, enhancing its performance and flexibility in different system configurations.
Key Specifications
| Parameter | Description |
|---|---|
| Number of DACs | 8 |
| Resolution | 8-bit |
| Output Type | Voltage - Buffered |
| Reference Type | External |
| Supply Voltage (Analog) | 10.8 V to 16.5 V, ±5 V |
| Supply Voltage (Digital) | 13.5 V to 16.5 V |
| Settling Time | 5 µs, 7 µs |
| INL/DNL (LSB) | ±0.5 (Max), ±1 (Max) |
| Architecture | R-2R |
| Package | 24-Lead SOIC (Wide) |
| Operating Temperature | −40°C to +85°C |
Key Features
- Eight 8-bit voltage-mode DACs with output buffer amplifiers on a single chip.
- No external trims required to achieve full specified performance.
- Separate on-chip latches for each DAC, with data transferred through a common 8-bit TTL/CMOS-compatible input port.
- Microprocessor-compatible control logic with a 95 ns WR pulse.
- Operates with single or dual supplies, with specified performance guaranteed for input reference voltages from 2 V to 10 V.
- Each output buffer amplifier can develop up to 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.
- Automotive systems where precision and reliability are crucial.
- Medical devices that need accurate analog signal generation.
- Aerospace and defense applications requiring high-performance DACs.
- Any system requiring multiple 8-bit DACs with buffered outputs and microprocessor compatibility.
Q & A
- What is the resolution of the AD7228ACR DACs?
The AD7228ACR features eight 8-bit DACs.
- What types of supply voltages can the AD7228ACR operate with?
The device can operate with single or dual supplies, with specified performance guaranteed for input reference voltages from 2 V to 10 V.
- Does the AD7228ACR require external trims for its DACs?
No, the AD7228ACR does not require external trims to achieve full specified performance.
- What is the settling time of the AD7228ACR DACs?
The settling time is 5 µs and 7 µs.
- Is the AD7228ACR compatible with microprocessors?
Yes, the control logic is speed compatible with most 8-bit microprocessors.
- What is the output capability of each DAC's buffer amplifier?
Each output buffer amplifier can develop up to 10 V across a 2 kΩ load.
- What is the operating temperature range of the AD7228ACR?
The operating temperature range is −40°C to +85°C.
- What type of architecture does the AD7228ACR use for its DACs?
The DACs use an R-2R architecture.
- What package options are available for the AD7228ACR?
The device is available in a 24-Lead SOIC (Wide) package among others.
- Does the AD7228ACR have built-in ESD protection?
Yes, the AD7228ACR features proprietary ESD protection circuitry, but proper ESD precautions are still recommended.
