Overview
The AD670SE/883B is a comprehensive 8-bit signal conditioning analog-to-digital converter (ADC) produced by Analog Devices Inc. This device integrates multiple components on a single monolithic chip, including an instrumentation amplifier front end, a DAC, a comparator, a successive approximation register (SAR), a precision voltage reference, and a three-state output buffer. This integration eliminates the need for external components or user trims to interface with an analog system to an 8-bit data bus. The AD670SE/883B operates on a +5 V system supply and is designed for high accuracy and reliability in various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 8 bits |
| Number of Channels | 1 |
| Input Ranges | 0 mV to 255 mV (1 mV/LSB), 0 to 2.55 V (10 mV/LSB) |
| Input Type | Differential, unipolar and bipolar |
| Conversion Time | 10 µs |
| Supply Voltage | +5 V |
| Operating Temperature Range | -55°C to +125°C (S grade) |
| Package Type | 20-Lead Ceramic DIP (Side Brazed), 20-terminal LCC |
| Military Standard | Optional processing to MIL-STD-883 |
Key Features
- Integrated instrumentation amplifier front end with excellent common-mode rejection.
- No external components or user trims required for accurate operation.
- Successive approximation conversion method using I2L (integrated injection logic).
- Thin-film SiCr resistors for stability and laser wafer trimming for calibration to within ±1 LSB.
- Differential inputs and support for both unipolar and bipolar input signals.
- Three-state output buffer for easy interface with data buses.
Applications
The AD670SE/883B is particularly useful in applications requiring the conversion of transducer signals that are superimposed on common-mode voltages. It is suitable for various industrial, medical, and communication systems where high accuracy and reliability are crucial. Some specific applications include:
- Transducer signal conditioning.
- Industrial process control.
- Medical instrumentation.
- Communication systems.
Q & A
- What is the resolution of the AD670SE/883B ADC?
The AD670SE/883B has an 8-bit resolution. - What are the input ranges of the AD670SE/883B?
The input ranges are 0 mV to 255 mV (1 mV/LSB) and 0 to 2.55 V (10 mV/LSB). - What is the conversion time of the AD670SE/883B?
The conversion time is 10 µs. - What is the operating temperature range of the AD670SE/883B?
The operating temperature range is -55°C to +125°C for the S grade. - What package types are available for the AD670SE/883B?
The device is available in 20-Lead Ceramic DIP (Side Brazed) and 20-terminal LCC packages. - Does the AD670SE/883B require external components or user trims?
No, the AD670SE/883B does not require external components or user trims for accurate operation. - What is the supply voltage for the AD670SE/883B?
The supply voltage is +5 V. - Is the AD670SE/883B compliant with any military standards?
Yes, it is available with optional processing to MIL-STD-883. - What type of input signals does the AD670SE/883B support?
The device supports differential, unipolar, and bipolar input signals. - What is the purpose of the three-state output buffer in the AD670SE/883B?
The three-state output buffer is designed for easy interface with data buses.
