Overview
The AD774BARZ is a 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 precision and fast conversion times. The AD774BARZ 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 on the same die.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 12 bits |
| Conversion Time | 8 µs (maximum) |
| Package Type | 28-Lead SOIC (Wide) |
| Temperature Range | -40°C to +85°C (A and B grades), 0°C to +70°C (J and K grades), -55°C to +125°C (T grade) |
| Supply Voltage | Not specified in the sources, but typically for such ADCs, it is around 5V |
| Interface | Three-state output buffer for direct interface to 8- and 16-bit microprocessor buses |
| Voltage Reference | High precision voltage reference included on-chip |
| Clock | Clock included on-chip |
Key Features
- High precision voltage reference and clock included on-chip
- Three-state output buffer for direct interface to 8- and 16-bit microprocessor buses
- Fast conversion time of 8 µs (maximum)
- Low power consumption
- Pin-compatible with the industry-standard AD574A
- Monolithic design using BiMOS II process, combining bipolar analog circuitry and digital CMOS logic
- Active trimming of thin-film resistors to minimize offset linearity and scaling errors
Applications
The AD774BARZ is suitable for a variety of applications requiring high precision and fast analog-to-digital conversion. These include:
- Data acquisition systems
- Industrial control systems
- Medical devices
- Aerospace and defense systems
- Automotive systems requiring precise analog-to-digital conversion
Q & A
- What is the resolution of the AD774BARZ ADC?
The AD774BARZ has a resolution of 12 bits. - What is the maximum conversion time of the AD774BARZ?
The maximum conversion time is 8 µs. - What package types are available for the AD774B series?
The AD774B series is available in 28-Lead SOIC (Wide), 28-pin plastic DIP, and 28-pin hermetically sealed ceramic DIP. - What is the temperature range for the AD774BARZ?
The temperature range varies by grade: -40°C to +85°C (A and B grades), 0°C to +70°C (J and K grades), and -55°C to +125°C (T grade). - Is the AD774BARZ pin-compatible with other ADCs?
Yes, it is pin-compatible with the industry-standard AD574A. - What process is used in the monolithic design of the AD774BARZ?
The monolithic design uses Analog Devices' BiMOS II process. - Does the AD774BARZ include a voltage reference and clock on-chip?
Yes, it includes a high precision voltage reference and clock on-chip. - What types of interfaces does the AD774BARZ support?
The AD774BARZ supports three-state output buffer for direct interface to 8- and 16-bit microprocessor buses. - How does the AD774BARZ minimize offset linearity and scaling errors?
It minimizes these errors through active trimming of thin-film resistors. - What are some typical applications for the AD774BARZ?
Typical applications include data acquisition systems, industrial control systems, medical devices, aerospace and defense systems, and automotive systems.
