Overview
The AD674BAD is a complete 12-bit successive approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the AD674B series, which is known for its high precision and versatility. The AD674BAD is pin-compatible with the industry standard AD574A but offers 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. The device includes a high-precision voltage reference and clock on-chip, requiring only power supplies and control signals for operation.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Conversion Time | 15 µs (maximum) |
| Input Type | Single-Ended |
| Interface Type | Parallel |
| Operating Supply Voltage | +5 V, ±12 V or ±15 V |
| Temperature Range | -40°C to +85°C (A and B grades) |
| Package | 28-lead hermetically sealed ceramic DIP (CDIP-28) |
| Power Dissipation | 375 mW |
| Number of ADC Inputs | 2 inputs |
| Number of Converters | 1 converter |
| Voltage Reference | Internal |
| Sample and Hold | No |
Key Features
- Industry Standard Pinout: The AD674BAD uses the pinout established by the industry standard AD574A, ensuring compatibility and ease of integration.
- Analog Operation: The device provides four calibrated ranges: 0 V to 10 V and 0 V to 20 V unipolar; –5 V to +5 V and –10 V to +10 V bipolar.
- Flexible Digital Interface: On-chip multiple-mode three-state output buffers and interface logic allow direct connection to most microprocessors, enabling the 12 bits of output data to be read either as one 12-bit word or as two 8-bit bytes.
- High Precision: Active laser trimming of thin-film resistors minimizes offset, linearity, and scaling errors, ensuring high precision in analog-to-digital conversion.
- Low Power Consumption: The AD674BAD offers lower power consumption compared to the AD574A, making it suitable for power-sensitive applications.
Applications
The AD674BAD is suitable for a variety of applications due to its high precision, fast conversion times, and flexible interface. Some common applications include:
- Industrial Automation: The device's robustness and precision make it ideal for industrial control systems and automation.
- Consumer Electronics: Its low power consumption and high performance make it a good fit for consumer electronic devices that require accurate analog-to-digital conversion.
- Medical Devices: The high precision and reliability of the AD674BAD make it suitable for medical devices that require accurate data conversion).
- Aerospace and Military: The device's availability in military-grade temperatures and hermetically sealed packages makes it suitable for aerospace and military applications).
Q & A
- What is the resolution of the AD674BAD?
The AD674BAD has a resolution of 12 bits.
- What is the maximum conversion time of the AD674BAD?
The maximum conversion time of the AD674BAD is 15 µs.
- What are the operating supply voltages for the AD674BAD?
The AD674BAD operates on +5 V and ±12 V or ±15 V power supplies.
- What is the temperature range for the AD674BAD?
The AD674BAD is specified for operation from -40°C to +85°C (A and B grades).
- What type of package is the AD674BAD available in?
The AD674BAD is available in a 28-lead hermetically sealed ceramic DIP (CDIP-28).
- Does the AD674BAD have an internal voltage reference?
Yes, the AD674BAD has an internal voltage reference.
- Is the AD674BAD RoHS compliant?
Yes, the AD674BAD is lead-free and RoHS compliant.
- What is the power dissipation of the AD674BAD?
The power dissipation of the AD674BAD is 375 mW.
- How many ADC inputs does the AD674BAD have?
The AD674BAD has 2 input channels.
- Is the AD674BAD suitable for aerospace and military applications?
Yes, the AD674BAD is available in military-grade temperatures and hermetically sealed packages, making it suitable for aerospace and military applications.
