Overview
The JM38510/14001BXA, also known as the AD574A, is a 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This integrated circuit combines all necessary analog and digital functions on a single chip, utilizing Analog Devices' Bipolar/I2L process. The design incorporates active laser-trimming of thin-film resistors to minimize offset, linearity, and scaling errors. The voltage reference is based on an implanted buried Zener diode, ensuring low noise and low drift. The digital section employs I2L logic for the successive-approximation register, control circuitry, and 3-state output buffers.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Input Type | Single-ended |
| Conversion Method | Successive Approximation Register (SAR) |
| Package Type | 28-Lead CerDIP (Side Brazed), 28-Lead Plastic DIP, PLCC, and Ceramic LCC |
| Temperature Range | 0°C to +70°C (J, K, L grades), -55°C to +125°C (S, T, U grades) |
| Voltage Reference | Implanted buried Zener diode |
| Logic Type | I2L logic |
| Output Type | 3-state output buffers |
| RoHS Status | Lead free/RoHS Compliant |
Key Features
- High accuracy due to active laser-trimming of thin-film resistors.
- Low noise and low drift voltage reference using an implanted buried Zener diode.
- I2L logic for low power consumption and high reliability.
- Available in various temperature grades and package types, including hermetically-sealed ceramic DIP and military-grade options.
- Optional processing to MIL-STD-883C Class B and JAN QPL certification for military and aerospace applications.
Applications
The AD574A is suitable for a wide range of applications requiring high precision and reliability, including:
- Military and aerospace systems due to its availability in military-grade packages and temperature ranges.
- Industrial control systems where high accuracy and stability are crucial.
- Medical devices that require precise analog-to-digital conversion.
- Data acquisition systems in various industries.
Q & A
- What is the resolution of the AD574A ADC?
The AD574A has a resolution of 12 bits. - What is the conversion method used in the AD574A?
The AD574A uses the Successive Approximation Register (SAR) conversion method. - What are the available package types for the AD574A?
The AD574A is available in 28-Lead CerDIP (Side Brazed), 28-Lead Plastic DIP, PLCC, and Ceramic LCC packages. - What is the temperature range for the different grades of the AD574A?
The J, K, and L grades are specified for operation over the 0°C to +70°C range, while the S, T, and U grades are specified for the -55°C to +125°C range. - Is the AD574A RoHS compliant?
Yes, the AD574A is lead free and RoHS compliant. - What type of logic is used in the AD574A?
The AD574A uses I2L logic for the digital section. - What is the purpose of the implanted buried Zener diode in the AD574A?
The implanted buried Zener diode serves as a low noise and low drift voltage reference. - Are there military-grade options available for the AD574A?
Yes, the AD574A is available with optional processing to MIL-STD-883C Class B and JAN QPL certification. - What are some typical applications of the AD574A?
The AD574A is used in military and aerospace systems, industrial control systems, medical devices, and data acquisition systems. - How does the AD574A achieve high accuracy?
The AD574A achieves high accuracy through active laser-trimming of thin-film resistors.
