Overview
The AD774BKN is a complete 12-bit successive-approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is part of the AD774B series, which offers high-performance and versatility in various analog-to-digital conversion applications. The AD774BKN is designed to be pin-compatible with the industry-standard AD574A but provides faster conversion times and lower power consumption. It features a monolithic design using Analog Devices’ BiMOS II process, combining high-performance bipolar analog circuitry with digital CMOS logic.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Conversion Time | 8 µs (maximum) |
| Accuracy | ±1/2 LSB |
| Temperature Range | 0°C to 70°C |
| Package Type | 28-lead Plastic DIP (N-28) |
| Power Supplies | +5 V and ±12 V or ±15 V |
| Analog Input Ranges | 0 V to 10 V, 0 V to 20 V (unipolar); –5 V to +5 V, –10 V to +10 V (bipolar) |
Key Features
- High-precision voltage reference and clock included on-chip.
- Three-state output buffer circuitry for direct interface to 8- and 16-bit microprocessor buses.
- Active laser trimming of thin-film resistors to minimize offset, linearity, and scaling errors.
- Flexible digital interface allowing data to be read as one 12-bit word or as two 8-bit bytes.
- Low power consumption compared to similar models like the AD574A.
Applications
- Data acquisition systems.
- Industrial control systems.
- Medical devices requiring precise analog-to-digital conversion.
- Aerospace and military applications where high accuracy and reliability are crucial.
- Automotive systems needing robust and accurate analog-to-digital conversion.
Q & A
- What is the resolution of the AD774BKN? The AD774BKN has a resolution of 12 bits.
- What is the maximum conversion time of the AD774BKN? The maximum conversion time is 8 µs.
- What is the temperature range for the AD774BKN? The AD774BKN operates over a temperature range of 0°C to 70°C.
- What types of power supplies does the AD774BKN require? The AD774BKN requires +5 V and ±12 V or ±15 V power supplies.
- Is the AD774BKN pin-compatible with other industry-standard ADCs? Yes, the AD774BKN is pin-compatible with the industry-standard AD574A.
- What are the analog input ranges for the AD774BKN? The analog input ranges are 0 V to 10 V, 0 V to 20 V (unipolar); –5 V to +5 V, –10 V to +10 V (bipolar).
- How does the AD774BKN minimize offset, linearity, and scaling errors? The AD774BKN uses active laser trimming of thin-film resistors to minimize these errors.
- What types of digital interfaces does the AD774BKN support? The AD774BKN supports three-state output buffer circuitry for direct interface to 8- and 16-bit microprocessor buses.
- Is the AD774BKN still in production? No, the AD774BKN is obsolete and no longer manufactured.
- What are some common applications for the AD774BKN? Common applications include data acquisition systems, industrial control systems, medical devices, aerospace, and automotive systems.
