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. 165-4750
Mfr. Part No.MCP3204-CI/P
BrandMicrochip
HK$26.061
Each (In a Tube of 30)
units
SAR 4 12-bit 100ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 14 ±2LSB Serial (SPI) - 5 V 19.05 x 6.35 x 3.3mm
RS Stock No. 379-2364
Mfr. Part No.MCP3201-BI/P
BrandMicrochip
HK$26.324
Each (In a Pack of 5)
units
SAR 1 12-bit 100ksps Pseudo Differential Voltage Through Hole PDIP 8 ±1LSB Serial (SPI) - 5 V 9.27 x 6.35 x 3.3mm
RS Stock No. 770-9741
Mfr. Part No.MCP3202-BI/P
BrandMicrochip
HK$28.57
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 → 5.5 V 10.16 x 7.11 x 4.95mm
RS Stock No. 889-5657
Mfr. Part No.MCP3208-CI/P
BrandMicrochip
HK$31.19
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. 889-5948
Mfr. Part No.MCP3428-E/SL
BrandMicrochip
HK$27.941
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. 770-9754
Mfr. Part No.MCP3204-BI/SL
BrandMicrochip
HK$37.20
Each
units
SAR 4 12-bit 100ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 14 ±1LSB Serial (SPI) Single 2.7 → 5.5 V 8.65 x 3.9 x 1.5mm
RS Stock No. 506-1527
Mfr. Part No.LTC1867CGN#PBF
HK$163.32
Each
units
SAR 8 16-bit 200ksps Differential, Single Ended Voltage Surface Mount SSOP 16 ±4LSB Serial (SPI/Microwire) - 5 V 4.98 x 3.99 x 1.5mm
RS Stock No. 703-7951
Mfr. Part No.MCP3426A0-E/MS
BrandMicrochip
HK$24.89
Each
units
Delta Sigma 2 16-bit 0.015ksps Differential Voltage Surface Mount MSOP 8 10ppm FSR Serial (I2C) Single 2.7 → 5.5 V 3 x 3 x 0.95mm
RS Stock No. 523-8216
Mfr. Part No.AD9220ARZ
HK$130.19
Each
units
Pipelined 1 12-bit 10000ksps Differential, Single Ended Voltage Surface Mount SOIC W 28 ±1.25LSB Parallel - 5 V 18.1 x 7.6 x 2.35mm
RS Stock No. 732-1408
Mfr. Part No.TLV1572ID
HK$106.20
Each
units
SAR - 10-bit - Differential Voltage Surface Mount SOIC 8 - Serial (SPI) Single 5 V 5 x 4 x 1.5mm
RS Stock No. 403-115
Mfr. Part No.MCP3202-CI/P
BrandMicrochip
HK$24.98
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. 523-8165
Mfr. Part No.AD7715ANZ-5
HK$141.88
Each
units
Delta Sigma 1 16-bit 19.2ksps Differential Voltage Through Hole PDIP 16 ±0.002%FSR Serial (SPI) - 5 V 20.07 x 6.35 x 3.3mm
RS Stock No. 517-296
Mfr. Part No.ADC122S625CIMM/NOPB
HK$62.27
Each
units
SAR 2 12-bit 200ksps Differential, Single Ended Voltage Surface Mount MSOP 10 ±1LSB Serial (SPI/QSPI/Microwire) - 5 V 3 x 3 x 0.86mm
RS Stock No. 759-1162
Mfr. Part No.AD7891ASZ-1
HK$293.80
Each
units
SAR 8 12-bit 454ksps Single Ended Voltage Surface Mount MQFP 44 ±1LSB Parallel, Serial Single 5 V 10 x 10 x 2.1mm
RS Stock No. 178-4949
Mfr. Part No.MCP3202-BI/P
BrandMicrochip
HK$23.814
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. 912-6820
Mfr. Part No.MCP3202-BI/SN
BrandMicrochip
HK$20.664
Each (In a Tube of 100)
units
SAR 2 12-bit 100ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 8 ±1LSB Serial (SPI) Single 2.7 to 5.5 V 4.9 x 3.9 x 1.5mm
RS Stock No. 165-4833
Mfr. Part No.MCP3201-BI/P
BrandMicrochip
HK$22.399
Each (In a Tube of 60)
units
SAR 1 12-bit 100ksps Pseudo Differential Voltage Through Hole PDIP 8 ±1LSB Serial (SPI) - 5 V 9.27 x 6.35 x 3.3mm
RS Stock No. 921-5030
Mfr. Part No.ADS1256IDBT
HK$101.095
Each (On a Reel of 250)
units
Delta Sigma 8 24-bit 30ksps Differential, Single Ended Voltage Surface Mount SSOP 28 ±0.001%FSR Serial (SPI) - 5 V 10.2 x 5.3 x 1.95mm
RS Stock No. 162-4126
Mfr. Part No.ADC122S625CIMM/NOPB
HK$33.968
Each (On a Reel of 1000)
units
SAR 2 12-bit 200ksps Differential, Single Ended Voltage Surface Mount MSOP 10 ±1LSB Serial (SPI/QSPI/Microwire) - 5 V 3 x 3 x 0.86mm
RS Stock No. 146-0196
Mfr. Part No.MCP3001-I/P
BrandMicrochip
HK$13.989
Each (In a Tube of 60)
units
SAR 1 10-bit 200ksps Pseudo Differential Voltage Through Hole PDIP 8 ±1LSB Serial (SPI) Single 2.7 to 5.5 V 10.16 x 7.11 x 4.95mm