In modern days Microcontroller comes with Analog to Digital converter but there are few instances where these peripheral supports are not available. One classic example is the 8051 series microcontroller units. In such cases, ADC0809 could provide an 8-bit Analog to digital interface that can be very useful. It is also used with the Raspberry Pi as well.

The ADC0809 data acquisition component is based on the monolithic CMOS with an 8-bit analog-to-digital converter, 8-channel multiplexer and microprocessor compatible control logic. These 0809 converters feature 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.

Input ranges from 0V to the input Vcc, could run through a single supply with 5V, has very low power operations limited to 15mW and the conversion Time is as fast as 100us.

ADC0809 pinout:

ADC0809 features, specification

Features: -

1. This is an 8-bit analog-to-digital converter.
2. It is very easy to Interface to All Microprocessors
3. No Zero or Full-Scale Adjust Required for the operation
4. It has 8-Channel Multiplexer with Address Logic
5. Supports 0V to VCC Input Range
6. Outputs meet TTL Voltage Level Specifications
7. ADC0809 Equivalent to MM74C949-1

Specification: -

• 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
• 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

ADC0809 Applications:

• Can be used with any mcu for A/D conversion
• Sensor integrations
• Raspberry pi A/D conversion
• Can be used with 8051 mcu units
• Parallel multiplexed conversion

ADC0809 Dimension and footprint:

Example Projects on ADC0809:

ADC0808/09 interfacing with 8051

Additional Resources:

ADC0809 Datasheet

Package Contains

1x ADC0809