Analogue to Digital Converters

Analogue to digital converters (ADCs) are devices that convert analogue input signals into a digital output signal, for example a sound captured from a microphone or light entering a digital camera. These analogue inputs are then converted into a digital signal output as either sound from a speaker or a picture in a camera.

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
RS Stock No. 709-4544
Mfr. Part No.ADS1115IDGST
kr 74,36
Each
Units
Delta Sigma 4 16-bit 0.86ksps Differential, Single Ended Voltage Surface Mount VSSOP 10 1LSB Serial (I2C) - 3.3 V
RS Stock No. 923-6911
Mfr. Part No.ADS1115IDGST
kr 58,292
Each (On a Reel of 250)
Units
Delta Sigma 4 16-bit 0.86ksps Differential, Single Ended Voltage Surface Mount VSSOP 10 1LSB Serial (I2C) - 3.3 V
RS Stock No. 403-913
Mfr. Part No.MCP3202-CI/SN
BrandMicrochip
kr 40,28
Each (In a Pack of 2)
Units
SAR 2 12-bit 100ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 8 ±2LSB Serial (SPI) - 3.3 V, 5 V
RS Stock No. 889-5225
Mfr. Part No.MCP3202-CI/SN
BrandMicrochip
kr 30,761
Each (In a Tube of 100)
Units
SAR 2 12-bit 100ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 8 ±2LSB Serial (SPI) - 3.3 V, 5 V
RS Stock No. 379-2516
Mfr. Part No.MCP3208-CI/P
BrandMicrochip
kr 59,292
Each (In a Pack of 5)
Units
SAR 8 12-bit 100ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 16 ±2LSB Serial (SPI) - 5 V
RS Stock No. 889-5143
Mfr. Part No.MCP3008-I/P
BrandMicrochip
kr 31,516
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
RS Stock No. 669-6064
Mfr. Part No.MCP3008-I/P
BrandMicrochip
kr 42,455
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
RS Stock No. 889-5657
Mfr. Part No.MCP3208-CI/P
BrandMicrochip
kr 49,53
Each (In a Tube of 30)
Units
SAR 8 12-bit 100ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 16 ±2LSB Serial (SPI) - 5 V
RS Stock No. 403-923
Mfr. Part No.MCP3204-CI/SL
BrandMicrochip
kr 57,13
Each (In a Pack of 2)
Units
SAR 4 12-bit 100ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 14 ±2LSB Serial (SPI) - 5 V
RS Stock No. 145-6070
Mfr. Part No.ADS1231ID
kr 72,972
Each (In a Tube of 40)
Units
Delta Sigma 1 24-bit 80sps Differential Voltage Surface Mount SOIC 16 ±8ppm Serial (SPI) Single 3 to 5.3 V
RS Stock No. 921-5093
Mfr. Part No.ADS1178IPAPT
kr 189,078
Each (On a Reel of 250)
Units
Delta Sigma 8 16-bit 52ksps Differential, Single Ended Voltage Surface Mount HTQFP 64 ±1LSB Serial (SPI) - 5 V
RS Stock No. 817-5691
Mfr. Part No.ADS1231ID
kr 91,97
Each
Units
Delta Sigma 1 24-bit 80sps Differential Voltage Surface Mount SOIC 16 ±8ppm Serial (SPI) Single 3 to 5.3 V
RS Stock No. 662-0032
Mfr. Part No.ADS1252U
kr 187,42
Each
Units
Delta Sigma 1 24-bit 41ksps Differential, Single Ended Voltage Surface Mount SOIC 8 ±0.002%FSR Serial (SPI) - 5 V
RS Stock No. 716-5823
Mfr. Part No.CS5361-KZZ
kr 199,27
Each
Units
Delta Sigma 2 24-bit 192ksps Differential Voltage Surface Mount TSSOP 24 - Serial Single 5 V
RS Stock No. 738-6651
Mfr. Part No.MCP3008-I/SL
BrandMicrochip
kr 37,345
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
RS Stock No. 922-2580
Mfr. Part No.ADS1252U
kr 173,564
Each (In a Tube of 75)
Units
Delta Sigma 1 24-bit 41ksps Differential, Single Ended Voltage Surface Mount SOIC 8 ±0.002%FSR Serial (SPI) - 5 V
RS Stock No. 774-7844
Mfr. Part No.TC7109CPL
BrandMicrochip
kr 119,80
Each
Units
Dual Slope 1 12-bit - Differential Voltage Through Hole PDIP 40 1Counts Parallel, Serial Dual -
RS Stock No. 922-2571
Mfr. Part No.ADS1251U
kr 100,689
Each (In a Tube of 75)
Units
Delta Sigma 1 24-bit 20ksps Differential, Single Ended Voltage Surface Mount SOIC 8 ±0.002%FSR Serial (SPI) - 5 V
RS Stock No. 709-8919
Mfr. Part No.ADS1178IPAPT
kr 252,87
Each
Units
Delta Sigma 8 16-bit 52ksps Differential, Single Ended Voltage Surface Mount HTQFP 64 ±1LSB Serial (SPI) - 5 V
RS Stock No. 761-9327
Mfr. Part No.LTC2442CG#PBF
kr 245,37
Each
Units
Delta Sigma 4 24-bit - Differential, Single Ended Voltage Surface Mount SSOP 36 10ppm Serial (SPI) Single 4.5 to 5.5 V