Overview
The AD570SD, produced by Analog Devices Inc., is a complete 8-bit successive approximation analog-to-digital converter (ADC). This integrated circuit incorporates a digital-to-analog converter (DAC), voltage reference, clock, comparator, successive approximation register, and output buffers, all fabricated on a single chip. This design eliminates the need for external components to perform a full accuracy 8-bit conversion, which is achieved in approximately 25 µs. The AD570SD utilizes advanced integrated circuit design and processing technology, including I²L (integrated injection logic) processing and laser trimming of the high stability SiCr thin-film resistor ladder network, along with a temperature-compensated, subsurface Zener reference to ensure full 8-bit accuracy over a wide temperature range.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 8-bit |
| Conversion Time | Approximately 25 µs |
| Supply Voltages | +5 V and -15 V |
| Analog Input Range | 0 V to +10 V (unipolar), ±5 V (bipolar) |
| Operating Temperature Range | -55°C to +125°C (AD570SD) |
| Package Type | 18-Lead Side-Brazed CerDIP |
| Data Interface | Parallel |
| Architecture | Successive Approximation |
Key Features
- No external components required for full accuracy 8-bit conversion.
- Advanced integrated circuit design and processing technology, including I²L processing and laser trimming of the high stability SiCr thin-film resistor ladder network.
- Temperature-compensated, subsurface Zener reference for high stability.
- Three-state outputs that go into high impedance state during conversion.
- DATA READY line indicates completion of conversion.
- No missing codes over the specified temperature range.
Applications
The AD570SD is suitable for a variety of applications requiring precise and fast analog-to-digital conversion. These include:
- Industrial control systems.
- Medical devices.
- Aerospace and military applications, given its wide operating temperature range and high reliability.
- Data acquisition systems.
- Automotive systems requiring robust and accurate ADCs.
Q & A
- What is the conversion time of the AD570SD?
The AD570SD executes a true 8-bit conversion in approximately 25 µs.
- What are the supply voltages for the AD570SD?
The AD570SD operates on supplies of +5 V and -15 V.
- What is the analog input range of the AD570SD?
The AD570SD accepts analog inputs of 0 V to +10 V (unipolar) or ±5 V (bipolar), externally selectable.
- What is the operating temperature range of the AD570SD?
The AD570SD operates over a temperature range of -55°C to +125°C.
- What type of package does the AD570SD come in?
The AD570SD is available in an 18-Lead Side-Brazed CerDIP package.
- Does the AD570SD have any missing codes?
No, the AD570SD guarantees full 8-bit accuracy with no missing codes over its specified temperature range.
- How does the AD570SD indicate the completion of a conversion?
The DATA READY line goes low to indicate the completion of a conversion.
- What is the architecture of the AD570SD?
The AD570SD uses a successive approximation architecture.
- Is the AD570SD suitable for military applications?
Yes, the AD570SD is suitable for military and aerospace applications due to its wide operating temperature range and high reliability.
- What type of data interface does the AD570SD use?
The AD570SD uses a parallel data interface.
