Overview
The AD670SD/883B is a comprehensive 8-bit signal conditioning analog-to-digital converter (ADC) produced by Analog Devices Inc. This device integrates an instrumentation amplifier front end, a digital-to-analog converter (DAC), a comparator, a successive approximation register (SAR), a precision voltage reference, and a three-state output buffer on a single monolithic chip. It is designed to provide a complete signal conditioning solution, eliminating the need for external components or user trims to achieve full accuracy. The AD670SD/883B operates on a single +5 V supply and is configured to interface directly with 8-bit data buses, making it highly versatile for various applications.
Key Specifications
| Specification | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | AD670SD/883B |
| Category | Integrated Circuits (ICs) > Data Acquisition - Analog to Digital Converters (ADC) |
| Description | IC ADC 8BIT SIGNAL COND 20CDIP |
| Package | 20-Lead CerDIP (Side Brazed) |
| Operating Temperature Range | -55°C to +125°C (S grade) |
| Resolution | 8 bits |
| Conversion Time | 10 µs |
| Supply Voltage | Single +5 V |
| Input Ranges | 0 mV to 255 mV (1 mV/LSB), 0 V to 2.55 V (10 mV/LSB) |
| Input Type | Differential, unipolar and bipolar |
| Common-Mode Rejection | Excellent common-mode rejection |
| Compliance | MIL-STD-883B compliant |
Key Features
- Complete Signal Conditioning: Includes an instrumentation amplifier front end, DAC, comparator, SAR, precision voltage reference, and a three-state output buffer on a single chip.
- No External Components Required: No user trims or external components are needed for accurate performance.
- Flexible Input Stage: Provides differential inputs with excellent common-mode rejection, allowing direct interface to various transducers.
- Single +5 V Supply Operation: Operates on the microprocessor’s supply voltage.
- Convenient Input Ranges: Offers four input ranges: 0 mV to 255 mV (1 mV/LSB) and 0 V to 2.55 V (10 mV/LSB) for both unipolar and bipolar inputs.
- Software Control of Output Mode: Allows selection of unipolar or bipolar inputs and binary or 2’s complement output codes.
- Advanced Circuit Design: Incorporates integrated injection logic (I2L) and thin-film SiCr resistors for stability and accuracy.
Applications
- Transducer Signal Conversion: Ideal for converting transducer signals superimposed on common-mode voltages.
- Industrial Automation: Suitable for various industrial automation applications requiring precise analog-to-digital conversion.
- Medical Devices: Used in medical devices that require accurate signal conditioning and conversion.
- Aerospace and Defense: Compliant with MIL-STD-883B, making it suitable for aerospace and defense applications.
- Automotive Systems: Can be used in automotive systems that require robust and accurate signal processing.
Q & A
- What is the resolution of the AD670SD/883B?
The AD670SD/883B has a resolution of 8 bits.
- What is the conversion time of the AD670SD/883B?
The conversion time is 10 µs.
- What are the input ranges of the AD670SD/883B?
The input ranges are 0 mV to 255 mV (1 mV/LSB) and 0 V to 2.55 V (10 mV/LSB) for both unipolar and bipolar inputs.
- Does the AD670SD/883B require external components or user trims?
No, the AD670SD/883B does not require external components or user trims for accurate performance.
- What is the operating temperature range of the AD670SD/883B?
The operating temperature range is -55°C to +125°C for the S grade.
- Is the AD670SD/883B compliant with any military standards?
Yes, the AD670SD/883B is MIL-STD-883B compliant.
- What type of supply voltage does the AD670SD/883B operate on?
The AD670SD/883B operates on a single +5 V supply.
- What are the key features of the input stage of the AD670SD/883B?
The input stage provides differential inputs with excellent common-mode rejection, allowing direct interface to various transducers.
- Can the AD670SD/883B be used in aerospace and defense applications?
Yes, due to its MIL-STD-883B compliance, it is suitable for aerospace and defense applications.
- How does the AD670SD/883B handle common-mode voltages?
The device has excellent common-mode rejection, making it useful for applications involving transducer signals superimposed on common-mode voltages.
