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. 889-5143
Mfr. Part No.MCP3008-I/P
BrandMicrochip
€1.543
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
€2.285
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. 144-9085
Mfr. Part No.MCP3202-CI/P
BrandMicrochip
€1.787
Each (In a Tube of 60)
units
SAR 2 12-bit 100ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 8 ±2LSB Serial (SPI) - 3.3 V, 5 V 9.27 x 6.35 x 3.3mm
RS Stock No. 403-115
Mfr. Part No.MCP3202-CI/P
BrandMicrochip
€2.64
Each (In a Pack of 2)
units
SAR 2 12-bit 100ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 8 ±2LSB Serial (SPI) - 3.3 V, 5 V 9.27 x 6.35 x 3.3mm
RS Stock No. 709-4544
Mfr. Part No.ADS1115IDGST
€5.57
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. 761-8970
Mfr. Part No.LTC1290DCN#PBF
€13.35
Each
units
SAR 8 12-bit 50kHz Differential, Single Ended Voltage Through Hole PDIP 20 ±0.5LSB Serial Dual, Single 5 V 26.924 x 6.477 x 3.683mm
RS Stock No. 923-6911
Mfr. Part No.ADS1115IDGST
€4.019
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. 889-5657
Mfr. Part No.MCP3208-CI/P
BrandMicrochip
€2.453
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. 379-2516
Mfr. Part No.MCP3208-CI/P
BrandMicrochip
€3.638
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. 661-9871
Mfr. Part No.ADS1110A2IDBVT
€4.67
Each
units
Delta Sigma 1 16-bit 0.128ksps Differential, Single Ended Voltage Surface Mount SOT-23 6 ±0.01%FSR Serial (I2C) - 5 V 2.9 x 1.6 x 1.15mm
RS Stock No. 795-8007
Mfr. Part No.AD7960BCPZ
€35.63
Each
units
SAR 1 18-bit 5Msps Differential Voltage Surface Mount LFCSP 32 ±2LSB Serial (LVDS) Single 1.8 V, 5 V 5.1 x 5.1 x 0.75mm
RS Stock No. 922-2555
Mfr. Part No.ADS1110A2IDBVT
€4.139
Each (On a Reel of 250)
units
Delta Sigma 1 16-bit 0.128ksps Differential, Single Ended Voltage Surface Mount SOT-23 6 ±0.01%FSR Serial (I2C) - 5 V 2.9 x 1.6 x 1.15mm
RS Stock No. 786-9893
Mfr. Part No.LTC2440IGN#PBF
€13.15
Each
units
Delta Sigma 1 24-bit - Differential Voltage Surface Mount SOIC 16 15ppm Vref Serial (SPI/Microwire) Single 4.5 to 5.5 V 4.978 x 3.988 x 1.478mm
RS Stock No. 697-7136
Mfr. Part No.AD7819YRZ
€6.25
Each
units
SAR 1 8-bit 200ksps Single Ended Voltage Surface Mount SOIC 16 ±0.5LSB Parallel - 3 V, 5 V 10 x 4 x 1.5mm
RS Stock No. 738-6651
Mfr. Part No.MCP3008-I/SL
BrandMicrochip
€2.125
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. 911-5713
Mfr. Part No.MCP3008-I/SL
BrandMicrochip
€1.543
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. 876-7247
Mfr. Part No.MCP3551-E/SN
BrandMicrochip
€2.553
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. 402-897
Mfr. Part No.MCP3551-E/SN
BrandMicrochip
€3.86
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. 538-6488
Mfr. Part No.AD7732BRUZ
€16.45
Each
units
Delta Sigma 2 24-bit 15.437ksps Differential Voltage Surface Mount TSSOP 28 ±0.003%FSR Serial (SPI) - 5 V 9.7 x 4.4 x 1.05mm
RS Stock No. 506-3832
Mfr. Part No.LTC2400CS8#PBF
€12.10
Each
units
Delta Sigma 1 24-bit 0.008ksps Single Ended Voltage Surface Mount SOIC 8 15ppm Vref Serial (SPI) - 3.3 V, 5 V 5 x 3.99 x 1.48mm