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 Dimensions
RS Stock No. 923-6911
Mfr. Part No.ADS1115IDGST
kr 43,697
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 3 x 3 x 1.02mm
RS Stock No. 709-4544
Mfr. Part No.ADS1115IDGST
kr 60,55
Each
Units
Delta Sigma 4 16-bit 0.86ksps Differential, Single Ended Voltage Surface Mount VSSOP 10 1LSB Serial (I2C) - 3.3 V 3 x 3 x 1.02mm
RS Stock No. 709-7008
Mfr. Part No.AD7984BRMZ
kr 314,51
Each
Units
SAR 1 18-bit 1330ksps Differential Voltage Surface Mount MSOP 10 ±2.25LSB Serial (SPI/QSPI/Microwire) - 2.5 V 3 x 3 x 0.85mm
RS Stock No. 427-199
Mfr. Part No.AD7328BRUZ
kr 126,98
Each
Units
SAR 8 12-bit 1000ksps Differential, Pseudo Differential, Single Ended Voltage Surface Mount TSSOP 20 ±1.1LSB Serial (SPI/QSPI/Microwire) - - 6.5 x 4.4 x 1.05mm
RS Stock No. 889-5225
Mfr. Part No.MCP3202-CI/SN
BrandMicrochip
kr 17,739
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 4.9 x 3.9 x 1.25mm
RS Stock No. 403-913
Mfr. Part No.MCP3202-CI/SN
BrandMicrochip
kr 32,235
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 4.9 x 3.9 x 1.25mm
RS Stock No. 506-1511
Mfr. Part No.LTC1865ACS8#PBF
kr 162,74
Each
Units
SAR 2 16-bit 250ksps Differential, Single Ended Voltage Surface Mount SOIC 8 ±6LSB Serial (SPI) - 5 V 5 x 3.99 x 1.48mm
RS Stock No. 379-2516
Mfr. Part No.MCP3208-CI/P
BrandMicrochip
kr 39,55
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 19.05 x 6.35 x 3.3mm
RS Stock No. 506-1634
Mfr. Part No.LTC2410CGN#PBF
kr 131,54
Each
Units
Delta Sigma 1 24-bit 0.008ksps Differential Voltage Surface Mount SSOP 16 14ppm Vref Serial (SPI) - 3.3 V, 5 V 4.98 x 3.99 x 1.5mm
RS Stock No. 639-4244
Mfr. Part No.ADC124S101CIMM/NOPB
kr 59,902
Each (In a Pack of 5)
Units
SAR 4 12-bit 1000ksps Single Ended Voltage Surface Mount MSOP 10 -1.2/1.6LSB Serial (SPI/QSPI/Microwire) - 3.3 V, 5 V 3 x 3 x 0.86mm
RS Stock No. 889-5143
Mfr. Part No.MCP3008-I/P
BrandMicrochip
kr 16,775
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
kr 24,84
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. 889-5657
Mfr. Part No.MCP3208-CI/P
BrandMicrochip
kr 26,668
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 19.05 x 6.35 x 3.3mm
RS Stock No. 102-5609
Mfr. Part No.ADC124S101CIMM/NOPB
kr 31,943
Each (On a Reel of 1000)
Units
SAR 4 12-bit 1000ksps Single Ended Voltage Surface Mount MSOP 10 -1.2/1.6LSB Serial (SPI/QSPI/Microwire) - 3.3 V, 5 V 3 x 3 x 0.86mm
RS Stock No. 629-3129
Mfr. Part No.AD7687BRMZ
kr 206,01
Each
Units
SAR 1 16-bit 250ksps Differential Voltage Surface Mount MSOP 10 ±1.5LSB Serial (SPI/QSPI/Microwire) - 2.5 V, 3.3 V, 5 V 3 x 3 x 0.85mm
RS Stock No. 817-5691
Mfr. Part No.ADS1231ID
kr 69,47
Each
Units
Delta Sigma 1 24-bit 80sps Differential Voltage Surface Mount SOIC 16 ±8ppm Serial (SPI) Single 3 to 5.3 V 10 x 4 x 1.5mm
RS Stock No. 912-2815
Mfr. Part No.MCP3204-CI/SL
BrandMicrochip
kr 24,377
Each (In a Tube of 57)
Units
SAR 4 12-bit 100ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 14 ±2LSB Serial (SPI) - 5 V 8.65 x 3.9 x 1.25mm
RS Stock No. 716-5823
Mfr. Part No.CS5361-KZZ
kr 130,46
Each
Units
Delta Sigma 2 24-bit 192ksps Differential Voltage Surface Mount TSSOP 24 - Serial Single 5 V 7.9 x 4.5 x 0.95mm
RS Stock No. 786-9871
Mfr. Part No.LTC1864CS8#PBF
kr 130,78
Each
Units
- 1 16-bit 250ksps Differential, Single Ended Voltage Surface Mount SOIC 8 ±6.5LSB Serial (SPI/Microwire) Single 4.75 to 5.25 V 5.004 x 3.988 x 1.498mm
RS Stock No. 798-9896
Mfr. Part No.AD7173-8BCPZ
kr 172,64
Each
Units
Delta Sigma 16 24-bit 31.25ksps Differential, Single Ended Voltage Surface Mount LFCSP 40 ±7.5ppm FSR Serial (I2C/SPI/QSPI/Microwire) Single 3 to 5.5 V 6.1 x 6.1 x 0.75mm