Overview
The AD673SD, produced by Analog Devices Inc., is a complete 8-bit successive approximation analog-to-digital converter (ADC) integrated on a single chip. This device includes a digital-to-analog converter (DAC), voltage reference, clock, comparator, successive approximation register (SAR), and 3-state output buffers. It does not require external components to perform full-accuracy 8-bit conversions, which are completed in 20 µs. The AD673SD is designed with advanced integrated circuit technology, including I2L (integrated injection logic) and laser-trimmed SiCr thin-film resistor ladder networks, ensuring high accuracy and stability over a wide temperature range.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 8 |
| Conversion Time | 20 µs |
| Package Type | 20-pin hermetically sealed ceramic DIP (CDIP) |
| Operating Temperature Range | -55°C to +125°C |
| Supply Voltage | +5 V, -12 V to -15 V |
| Analog Input Range | 0 V to +10 V or -5 V to +5 V |
| Integral Nonlinearity (INL) | ±0.5 LSB |
| Data Interface | Parallel |
| Architecture | Successive Approximation (SAR) |
Key Features
- Complete 8-bit successive approximation ADC on a single chip.
- No external components required for full-accuracy conversions.
- High accuracy maintained through laser-trimmed SiCr thin-film resistor ladder networks and a temperature-compensated sub-surface Zener reference.
- Operates on supplies of +5 V and -12 V to -15 V.
- Accepts analog inputs of 0 V to +10 V or -5 V to +5 V.
- Conversion initiated by the trailing edge of a positive pulse on the CONVERT line.
- DATA READY signal indicates completion of the conversion cycle.
- Available in hermetically sealed ceramic DIP and plastic DIP packages.
Applications
- Industrial control systems requiring precise analog-to-digital conversion.
- Medical devices that need high accuracy and reliability in signal conversion.
- Aerospace and military applications due to its wide operating temperature range and high reliability.
- Automotive systems for sensor data acquisition and processing.
- Test and measurement equipment where accurate and fast conversions are essential.
Q & A
- What is the conversion time of the AD673SD?
The AD673SD completes an 8-bit conversion in 20 µs.
- What are the operating temperature ranges for the AD673SD?
The AD673SD operates over a temperature range of -55°C to +125°C.
- What is the supply voltage requirement for the AD673SD?
The AD673SD requires +5 V and -12 V to -15 V supply voltages.
- What is the analog input range for the AD673SD?
The AD673SD accepts analog inputs of 0 V to +10 V or -5 V to +5 V.
- What is the integral nonlinearity (INL) of the AD673SD?
The INL of the AD673SD is ±0.5 LSB.
- How is the conversion cycle initiated in the AD673SD?
The conversion cycle is initiated by the trailing edge of a positive pulse on the CONVERT line.
- What signal indicates the completion of the conversion cycle in the AD673SD?
The DATA READY signal indicates the completion of the conversion cycle.
- In what packages is the AD673SD available?
The AD673SD is available in 20-pin hermetically sealed ceramic DIP and 20-pin plastic DIP packages.
- What architecture does the AD673SD use for analog-to-digital conversion?
The AD673SD uses a successive approximation (SAR) architecture.
- Is the AD673SD suitable for high-reliability applications?
Yes, the AD673SD is designed with high accuracy and reliability, making it suitable for high-reliability applications such as aerospace and military.
