Overview
The AD7228ACRZ, produced by Analog Devices Inc., is a highly integrated octal 8-bit digital-to-analog converter (DAC) that combines eight voltage-mode DACs, output buffer amplifiers, and interface logic on a single monolithic chip. This device is designed to offer high performance and versatility, making it suitable for a wide range of applications. The AD7228ACRZ operates with either single or dual supplies, enhancing its flexibility in various system configurations. It is fabricated using an all ion-implanted, high-speed, Linear Compatible CMOS (LC2MOS) process, ensuring the integration of high-speed digital logic and precision analog circuits on the same chip.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of DACs | 8 | - |
| Resolution | 8-bit | - |
| Supply Voltage (Single Supply) | 4.75 V to 15 V | V |
| Supply Voltage (Dual Supply) | VDD: 10.8 V to 16.5 V, VSS: -4.5 V to -5.5 V | V |
| Reference Voltage Range | 2 V to 10 V | V |
| Output Voltage Range | Up to 10 V across a 2 kΩ load | V |
| Settling Time | 5 μs, 7 μs | μs |
| Integral Nonlinearity (INL) | ±2 LSB | LSB |
| Package Type | 24-Lead SOIC (Wide) | - |
| Operating Temperature Range | -40°C to +85°C | °C |
Key Features
- Eight 8-bit voltage-mode DACs with output buffer amplifiers on a single chip, reducing board space and increasing reliability.
- Operates with single or dual supplies, allowing for flexible system design.
- No external trims required to achieve full specified performance.
- Separate on-chip latches for each DAC, with a common 8-bit TTL/CMOS-compatible input port.
- Address inputs A0, A1, and A2 determine which latch is loaded when the WR signal goes low.
- Control logic is speed compatible with most 8-bit microprocessors.
- Each DAC consists of a highly stable, thin-film R-2R ladder and eight high-speed NMOS switches.
- Capable of developing up to 10 V across a 2 kΩ load.
Applications
- Industrial control systems requiring multiple analog outputs.
- Aerospace and defense applications where high reliability and precision are crucial.
- Medical devices that need accurate and stable analog signals.
- Automotive systems for control and monitoring.
- Test and measurement equipment where multiple DACs are necessary.
Q & A
- What is the resolution of the AD7228ACRZ DACs?
The AD7228ACRZ has eight 8-bit DACs.
- What are the supply voltage options for the AD7228ACRZ?
The device can operate with either a single supply (4.75 V to 15 V) or dual supplies (VDD: 10.8 V to 16.5 V, VSS: -4.5 V to -5.5 V).
- What is the reference voltage range for the AD7228ACRZ?
The reference voltage range is from 2 V to 10 V.
- How many DACs are integrated on the AD7228ACRZ chip?
The AD7228ACRZ integrates eight DACs.
- What is the settling time of the AD7228ACRZ DACs?
The settling time is 5 μs or 7 μs.
- Does the AD7228ACRZ require external trims for full performance?
No, the AD7228ACRZ does not require external trims to achieve full specified performance.
- What is the operating temperature range of the AD7228ACRZ?
The operating temperature range is -40°C to +85°C.
- What type of package is the AD7228ACRZ available in?
The AD7228ACRZ is available in a 24-Lead SOIC (Wide) package.
- Is the AD7228ACRZ compatible with microprocessors?
Yes, the control logic is speed compatible with most 8-bit microprocessors.
- What is the output voltage range of the AD7228ACRZ DACs?
Each output buffer amplifier can develop up to 10 V across a 2 kΩ load.
