The ADC0808 data acquisition component is a monolithic CMOS device with an 8-bit analog-to-digital converter, 8-channel multiplexer and microprocessor compatible control logic. The 8-bit A/D converter uses successive approximation as the conversion technique. The converter features a high impedance chopper stabilized comparator, a 256R voltage divider with analog switch tree and a successive approximation register. The 8-channel multiplexer can directly access any of 8-single-ended analog signals.
The device eliminates the need for external zero and full-scale adjustments. Easy interfacing to microprocessors is provided by the latched and decoded multiplexer address inputs and latched TTL TRI-STATE outputs.
The design of the ADC0808 has been optimized by incorporating the most desirable aspects of several A/D conversion techniques. The ADC0808 offers high speed, high accuracy, minimal temperature dependence, excellent long-term accuracy and repeat-ability, and consumes minimal power. These features make this device ideally suited to applications from process and machine control to consumer and automotive applications.
Features:-
- Easy Interface to All Microprocessors
- Operates Ratio-metrically or with 5 VDC or Analog Span Adjusted Voltage Reference
- No Zero or Full-Scale Adjust Required
- 8-Channel Multiplexer with Address Logic
- 0V to VCC Input Range
- Outputs meet TTL Voltage Level Specifications
- ADC0808 Equivalent to MM74C949
Specifications:-
| Parameters | Specification |
| Part number | ADC0808-N |
| Resolution (Bits) | 8 |
| Sample rate (Max) (kSPS) | 10 |
| Number of input channels | 8 |
| Interface | Parallel |
| Operating temperature range ( C ) | -40 to 85 |
| Package Group | PLCC | 28 |
| Power consumption (Typ) (mW) | 15 |
| Package size: mm2:W x L (PKG) | 28PLCC: 155 mm2: 12.45 x 12.45 (PLCC | 28) |
| Architecture | SAR |
| Input type | Single-Ended |
| Multi-channel configuration | Multiplexed |
| Input range (Max) (V) | 6 |
| Input range (Min) (V) | 0 |
| Analog voltage AVDD (Min) (V) | 4.5 |
| Analog voltage AVDD (Max) (V) | 6 |
| Digital supply (Min) (V) | 4.5 |
| Digital supply (Max) (V) | 6 |
| INL (Max) (+/-LSB) | 1.25 |
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