Overview
The AD7225LRZ-REEL, produced by Analog Devices Inc., is a quad 8-bit voltage output digital-to-analog converter (DAC) integrated into a single monolithic chip. This device features four independent DAC channels, each with a separate reference input terminal, output buffer amplifiers, and double-buffered interface logic. The AD7225 is fabricated using an all ion-implanted, high-speed Linear Compatible CMOS (LC2MOS) process, which integrates high-speed digital logic and precision analog circuitry. This design reduces board space requirements and enhances system reliability in applications requiring multiple converters.
Key Specifications
| Parameter | Description |
|---|---|
| Number of DACs | 4 |
| Resolution | 8-bit |
| Output Type | Voltage Output |
| Reference Input Range | 2 V to 12.5 V (dual supply), 10 V (single supply) |
| Output Buffer Amplifier Capability | 10 V across a 2 kΩ load |
| Logic Compatibility | TTL and CMOS (5 V) level compatible |
| Package Types | 24-Lead SOIC (Wide), Reel |
| Power Supply | Dual supply: VDD = 15 V, VSS = -5 V; Single supply: VDD = 15 V, VSS = 0 V |
Key Features
- Four independent 8-bit DAC channels with separate reference input terminals.
- Double-buffered interface logic with input and DAC registers per channel.
- Simultaneous update of all four outputs controlled by the LDAC signal.
- No external trims required for full specified performance.
- Output buffer amplifiers capable of developing 10 V across a 2 kΩ load.
- Logic inputs compatible with TTL and CMOS (5 V) levels.
- Fabricated using high-speed Linear Compatible CMOS (LC2MOS) process.
Applications
- Industrial control systems requiring multiple analog outputs.
- Aerospace and defense systems needing high reliability and precision.
- Medical devices that require accurate and stable analog signals.
- Automotive systems where space and reliability are critical.
- Any system requiring simultaneous update of multiple analog outputs.
Q & A
- What is the resolution of each DAC channel in the AD7225LRZ-REEL?
Each DAC channel has an 8-bit resolution.
- How many DAC channels does the AD7225LRZ-REEL have?
The AD7225LRZ-REEL has four independent DAC channels.
- What is the range of the reference input voltage for the AD7225LRZ-REEL?
The reference input voltage range is from 2 V to 12.5 V for dual supply operation and 10 V for single supply operation.
- What type of logic inputs are compatible with the AD7225LRZ-REEL?
The logic inputs are compatible with TTL and CMOS (5 V) levels.
- How are the analog outputs updated in the AD7225LRZ-REEL?
The analog outputs are updated simultaneously under the control of the LDAC signal.
- What is the capability of the output buffer amplifiers in the AD7225LRZ-REEL?
Each output buffer amplifier can develop 10 V across a 2 kΩ load.
- What type of process is used to fabricate the AD7225LRZ-REEL?
The device is fabricated using an all ion-implanted, high-speed Linear Compatible CMOS (LC2MOS) process.
- Do the DAC channels in the AD7225LRZ-REEL require external trims for full performance?
No external trims are required to achieve full specified performance.
- What are the typical package types available for the AD7225LRZ-REEL?
The device is available in 24-Lead SOIC (Wide) packages, also offered in reel format.
- What are some common applications of the AD7225LRZ-REEL?
Common applications include industrial control systems, aerospace and defense systems, medical devices, and automotive systems.
