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. 738-6651
Mfr. Part No.MCP3008-I/SL
BrandMicrochip
PHP118.335
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
PHP98.27
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. 889-5143
Mfr. Part No.MCP3008-I/P
BrandMicrochip
PHP102.90
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
PHP158.125
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. 817-5736
Mfr. Part No.ADS7884SDBVT
PHP249.02
Each (In a Pack of 2)
units
SAR 1 10-bit 3Msps Single Ended Voltage Surface Mount SOT-23 6 0.8LSB Serial (SPI) Single 3.3 V 3.05 x 1.75 x 1.3mm
RS Stock No. 162-8062
Mfr. Part No.ADS7884SDBVT
PHP152.764
Each (On a Reel of 250)
units
SAR 1 10-bit 3Msps Single Ended Voltage Surface Mount SOT-23 6 0.8LSB Serial (SPI) Single 3.3 V 3.05 x 1.75 x 1.3mm
RS Stock No. 170-8171
Mfr. Part No.ICL7107CPLZ
PHP683.55
Each (In a Tube of 9)
units
Dual Slope 1 3.5 digit 0.003ksps Differential Voltage Through Hole PDIP 40 ±1Counts - - - 53.2 x 14.73 x 4.95mm
RS Stock No. 159-6624
Mfr. Part No.MCP3002-I/P
BrandMicrochip
PHP84.378
Each (In a Tube of 60)
units
SAR 2 10-bit 200ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 8 ±1LSB Serial (SPI) - 5 V 9.27 x 6.35 x 3.3mm
RS Stock No. 709-6566
Mfr. Part No.AD7685ARMZ
PHP748.70
Each
units
SAR 1 16-bit 250ksps Pseudo Differential Voltage Surface Mount MSOP 10 ±6LSB Serial (SPI/QSPI/Microwire) - 2.5 V, 3.3 V, 5 V 3 x 3 x 0.85mm
RS Stock No. 669-6054
Mfr. Part No.MCP3002-I/P
BrandMicrochip
PHP86.06
Each (In a Pack of 2)
units
SAR 2 10-bit 200ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 8 ±1LSB Serial (SPI) - 5 V 9.27 x 6.35 x 3.3mm
RS Stock No. 703-7945
Mfr. Part No.MCP3428-E/SL
BrandMicrochip
PHP192.42
Each
units
Delta Sigma 4 16-bit 0.015ksps Differential Voltage Surface Mount SOIC 14 10ppm FSR Serial (I2C) Single 2.7 → 5.5 V 8.65 x 3.9 x 1.25mm
RS Stock No. 889-5948
Mfr. Part No.MCP3428-E/SL
BrandMicrochip
PHP155.40
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
PHP141.278
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. 412-377
Mfr. Part No.AD7794BRUZ
PHP683.69
Each
units
Delta Sigma 6 24-bit 0.47ksps Differential Voltage Surface Mount TSSOP 24 ±15ppm FSR Serial (SPI) - 3.3 V, 5 V 7.8 x 4.4 x 1.05mm
RS Stock No. 709-7430
Mfr. Part No.AD977AARZ
PHP2,721.80
Each
units
SAR 1 16-bit 200ksps Single Ended Voltage Surface Mount SOIC 20 ±3LSB Serial Single 5 V 13 x 7.6 x 2.35mm
RS Stock No. 669-6067
Mfr. Part No.MCP3004-I/P
BrandMicrochip
PHP117.82
Each (In a Pack of 2)
units
SAR 4 10-bit 200ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 14 ±1LSB Serial (SPI) - 5 V 19.05 x 6.35 x 3.3mm
RS Stock No. 146-0130
Mfr. Part No.MCP3004-I/P
BrandMicrochip
PHP90.83
Each (In a Tube of 30)
units
SAR 4 10-bit 200ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 14 ±1LSB Serial (SPI) - 5 V 19.05 x 6.35 x 3.3mm
RS Stock No. 709-6746
Mfr. Part No.AD7819YRUZ
PHP349.29
Each
units
SAR 1 8-bit 200ksps Single Ended Voltage Surface Mount TSSOP 16 ±0.5LSB Parallel - 3 V, 5 V 5 x 4.4 x 1.05mm
RS Stock No. 697-7170
Mfr. Part No.AD7997BRUZ-0
PHP296.63
Each
units
SAR 8 10-bit 188ksps Single Ended Voltage Surface Mount TSSOP 20 ±0.5LSB Serial (I2C) - 3.3 V, 5 V 6.5 x 4.4 x 1.05mm
RS Stock No. 809-9733
Mfr. Part No.AD7829BRUZ-1
PHP507.15
Each
units
Flash 8 8-bit 2Msps Single Ended Voltage Surface Mount TSSOP 28 ±0.75LSB Parallel Single 2.7 to 5.5 V 9.8 x 4.5 x 1.05mm