Analogue to Digital Converters

Analogue to digital converters (ADCs) are devices that convert input analogue signals into a digital such output as a sound captured from a microphone or light entering a digital camera, into a digital signal.

ADCs sample the input signals at specific points in time which reduces the allowable bandwidth of the input signal for increased efficiency.

What does an analogue to digital converter do?

Audio analogue to digital converters captures and converts analogue sounds into digital signals using a mathematical function called quantisation. This conversion occurs periodically instead of continuing to minimise noise generation.

Video analogue to digital to converters are a high-frequency low- to medium-resolution type that is used to convert analogue video data into digital video signals such as displays on digital cameras.

General Purpose ADCs are considered the base type of ADC un of the mill ADCs are used to convert analogue signals to digital signals in equipment such as temperature sensors.

Types of analogue to digital converters

The most widely used types of ADCs are;

  • Flash – Flash ADCs are considered the fastest way to convert an analogue signal to a digital signal and are suitable for applications requiring very large bandwidths such as satellite communication, data acquisition, radar processing and sampling oscilloscopes.
  • Successive approximation – A successive approximation ADC converts continuous analogue waveform into digital using a binary search through all quantization levels before finally combining a digital output for each conversion.
  • Sigma-delta – Sigma delta ADCs converts the signal by large factors and filters the desired signal. They offer high resolution, low power consumption and are used in applications such as process control, temperature measurement and weight measurement scale devices.

Applications

Audio ADCs are widely used in applications such as;

  • Professional audio mixing consoles
  • Home theatre systems
  • Musical instruments

Video ADCs are used in;

  • Medical Imaging
  • Digital Instrumentation
  • Digital cameras

General Purpose ADCs are used primarily in applications such as;

  • Battery Operated Systems
  • Sensor Interfaces
  • Frequency measurement

...
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Description Price Architecture Number of ADCs Resolution Sampling Rate Input Signal Type Input Type Mounting Type Package Type Pin Count Integral Nonlinearity Error Digital Interface Type Power Supply Type Typical Single Supply Voltage Dimensions
RS stock no. 889-5143
Mfr. Part No.MCP3008-I/P
BrandMicrochip
R 30.185
Each (In a Tube of 30)
units
SAR 8 10-bit 200ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 16 ±1LSB Serial (SPI) - 5 V 19.05 x 6.35 x 3.3mm
RS stock no. 669-6064
Mfr. Part No.MCP3008-I/P
BrandMicrochip
R 64.81
Each (In a Pack of 2)
units
SAR 8 10-bit 200ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 16 ±1LSB Serial (SPI) - 5 V 19.05 x 6.35 x 3.3mm
RS stock no. 703-7945
Mfr. Part No.MCP3428-E/SL
BrandMicrochip
R 88.74
Each
units
Delta Sigma 4 16-bit 0.015ksps Differential Voltage Surface Mount SOIC 14 10ppm FSR Serial (I2C) Single 2.7 to 5.5 V 8.65 x 3.9 x 1.25mm
RS stock no. 889-5948
Mfr. Part No.MCP3428-E/SL
BrandMicrochip
R 48.748
Each (In a Tube of 57)
units
Delta Sigma 4 16-bit 0.015ksps Differential Voltage Surface Mount SOIC 14 10ppm FSR Serial (I2C) Single 2.7 to 5.5 V 8.65 x 3.9 x 1.25mm
RS stock no. 819-5610
Mfr. Part No.MCP3428T-E/SL
BrandMicrochip
R 44.112
Each (On a Reel of 2600)
units
Delta Sigma 4 16-bit 328sps Differential, Single Ended Voltage Surface Mount SOIC 14 10ppm FSR Serial (I2C) Single 2.7 to 5.5 V 8.65 x 3.9 x 1.25mm
RS stock no. 912-3001
Mfr. Part No.MCP3021A5T-E/OT
BrandMicrochip
R 15.551
Each (On a Reel of 3000)
units
SAR 1 10-bit 22.3ksps Single Ended Voltage Surface Mount SOT-23 5 ±1LSB Serial (I2C) - 5 V 3.1 x 1.8 x 1.3mm
RS stock no. 738-6011
Mfr. Part No.MCP3021A5T-E/OT
BrandMicrochip
R 33.35
Each (In a Pack of 2)
units
SAR 1 10-bit 22.3ksps Single Ended Voltage Surface Mount SOT-23 5 ±1LSB Serial (I2C) - 5 V 3.1 x 1.8 x 1.3mm
RS stock no. 669-6076
Mfr. Part No.MCP3421A0T-E/CH
BrandMicrochip
R 39.58
Each (In a Pack of 2)
units
Delta Sigma 1 18-bit 0.004ksps Differential, Single Ended Voltage Surface Mount SOT-23 6 35ppm FSR Serial (I2C) - 5 V 2.95 x 1.63 x 1.1mm
RS stock no. 889-5118
Mfr. Part No.MCP3421A0T-E/CH
BrandMicrochip
R 29.676
Each (On a Reel of 3000)
units
Delta Sigma 1 18-bit 0.004ksps Differential, Single Ended Voltage Surface Mount SOT-23 6 35ppm FSR Serial (I2C) - 5 V 2.95 x 1.63 x 1.1mm
RS stock no. 887-7306
Mfr. Part No.MCP3208-CI/SL
BrandMicrochip
R 47.695
Each (In a Tube of 50)
units
SAR 8 12-bit 100ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 16 ±2LSB Serial (SPI) - 5 V 9.9 x 3.9 x 1.25mm
RS stock no. 379-2522
Mfr. Part No.MCP3208-CI/SL
BrandMicrochip
R 57.37
Each (In a Pack of 5)
units
SAR 8 12-bit 100ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 16 ±2LSB Serial (SPI) - 5 V 9.9 x 3.9 x 1.25mm
RS stock no. 178-4949
Mfr. Part No.MCP3202-BI/P
BrandMicrochip
R 39.71
Each (In a Tube of 60)
units
SAR 2 12-bit 100ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 8 ±1LSB Serial (SPI) Single 2.7 to 5.5 V 10.16 x 7.11 x 4.95mm
RS stock no. 770-9741
Mfr. Part No.MCP3202-BI/P
BrandMicrochip
R 48.055
Each (In a Pack of 2)
units
SAR 2 12-bit 100ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 8 ±1LSB Serial (SPI) Single 2.7 to 5.5 V 10.16 x 7.11 x 4.95mm
RS stock no. 738-6651
Mfr. Part No.MCP3008-I/SL
BrandMicrochip
R 53.715
Each (In a Pack of 2)
units
SAR 8 10-bit 200ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 16 ±1LSB Serial (SPI) - 5 V 9.9 x 3.9 x 1.25mm
RS stock no. 402-897
Mfr. Part No.MCP3551-E/SN
BrandMicrochip
R 65.50
Each
units
Delta Sigma 1 22-bit 13.75sps Differential Voltage Surface Mount SOIC 8 6ppm Serial (SPI) Single 5 V 4.9 x 3.9 x 1.5mm
RS stock no. 876-7247
Mfr. Part No.MCP3551-E/SN
BrandMicrochip
R 49.508
Each (In a Tube of 100)
units
Delta Sigma 1 22-bit 13.75sps Differential Voltage Surface Mount SOIC 8 6ppm Serial (SPI) Single 2.7 to 5.5 V 4.9 x 3.9 x 1.5mm
RS stock no. 911-5713
Mfr. Part No.MCP3008-I/SL
BrandMicrochip
R 30.065
Each (In a Tube of 50)
units
SAR 8 10-bit 200ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 16 ±1LSB Serial (SPI) - 5 V 9.9 x 3.9 x 1.25mm
RS stock no. 165-4858
Mfr. Part No.MCP3002-I/SN
BrandMicrochip
R 22.595
Each (In a Tube of 100)
units
SAR 2 10-bit 200ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 8 ±1LSB Serial (SPI) - 5 V 4.9 x 3.9 x 1.25mm
RS stock no. 738-6020
Mfr. Part No.MCP3221A5T-E/OT
BrandMicrochip
R 25.605
Each (In a Pack of 2)
units
SAR 1 12-bit 22.3ksps Single Ended Voltage Surface Mount SOT-23 5 ±2LSB Serial (I2C) - 5 V 3.1 x 1.8 x 1.3mm
RS stock no. 669-6058
Mfr. Part No.MCP3002-I/SN
BrandMicrochip
R 29.905
Each (In a Pack of 2)
units
SAR 2 10-bit 200ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 8 ±1LSB Serial (SPI) - 5 V 4.9 x 3.9 x 1.25mm