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. 759-1042
Mfr. Part No.AD7606BSTZ
TWD1,157.00
Each
units
SAR 8 16-bit 200ksps Single Ended Voltage Surface Mount LQFP 64 ±2LSB Parallel, Serial Single 5 V 10.2 x 10.2 x 1.45mm
RS Stock No. 669-6064
Mfr. Part No.MCP3008-I/P
BrandMicrochip
TWD84.50
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. 889-5143
Mfr. Part No.MCP3008-I/P
BrandMicrochip
TWD71.70
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. 709-6566
Mfr. Part No.AD7685ARMZ
TWD524.00
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. 922-2537
Mfr. Part No.ADS1000A0IDBVT
TWD56.30
Each (On a Reel of 250)
units
Delta Sigma 1 12-bit 0.128ksps Differential, Single Ended Voltage Surface Mount SOT-23 6 1LSB Serial (I2C) - 5 V 2.9 x 1.6 x 1.15mm
RS Stock No. 661-9843
Mfr. Part No.ADS1000A0IDBVT
TWD97.00
Each
units
Delta Sigma 1 12-bit 0.128ksps Differential, Single Ended Voltage Surface Mount SOT-23 6 1LSB Serial (I2C) - 5 V 2.9 x 1.6 x 1.15mm
RS Stock No. 817-5727
Mfr. Part No.ADS7883SBDBVT
TWD192.00
Each
units
SAR 1 12-bit 3Msps Single Ended Voltage Surface Mount SOT-23 6 1LSB Serial (SPI) Single 3.3 V 3.05 x 1.75 x 1.3mm
RS Stock No. 121-9700
Mfr. Part No.ADS7883SBDBVT
TWD120.10
Each (On a Reel of 250)
units
SAR 1 12-bit 3Msps Single Ended Voltage Surface Mount SOT-23 6 1LSB Serial (SPI) Single 3.3 V 3.05 x 1.75 x 1.3mm
RS Stock No. 709-6531
Mfr. Part No.AD7572AJNZ10
TWD1,383.00
Each
units
SAR 1 12-bit - Single Ended Voltage Through Hole PDIP 24 ±1LSB Parallel - - 31.19 x 6.61 x 3.3mm
RS Stock No. 757-8153
Mfr. Part No.LTC2380CMS-16#PBF
TWD1,365.00
Each
units
SAR 1 16-bit 2Msps Differential, Single Ended Voltage Surface Mount MSOP 16 ±0.6LSB Serial (SPI) Single 2.5 V 4.039 x 3 x 0.86mm
RS Stock No. 738-6651
Mfr. Part No.MCP3008-I/SL
BrandMicrochip
TWD80.00
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
TWD66.30
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. 922-6734
Mfr. Part No.HCPL-786J-000E
BrandBroadcom
TWD174.70
Each (In a Tube of 45)
units
Delta Sigma 1 12-bit - Single Ended Voltage Surface Mount SOIC 16 - - Single 4.5 to 5.5 V 10.31 x 7.493 x 3.505mm
RS Stock No. 734-4972
Mfr. Part No.HCPL-786J-000E
BrandBroadcom
TWD206.00
Each
units
Delta Sigma 1 12 bit - Single Ended Voltage Surface Mount SOIC 16 - - Single 4.5 → 5.5 V 10.31 x 7.493 x 3.505mm
RS Stock No. 669-6082
Mfr. Part No.MCP3423-E/UN
BrandMicrochip
TWD113.00
Each
units
Delta Sigma 2 18-bit 0.004ksps Differential, Single Ended Voltage Surface Mount MSOP 10 35ppm FSR Serial (I2C) - 5 V 3 x 3 x 0.85mm
RS Stock No. 889-5768
Mfr. Part No.MCP3423-E/UN
BrandMicrochip
TWD85.40
Each (In a Tube of 100)
units
Delta Sigma 2 18-bit 0.004ksps Differential, Single Ended Voltage Surface Mount MSOP 10 35ppm FSR Serial (I2C) - 5 V 3 x 3 x 0.85mm
RS Stock No. 102-5606
Mfr. Part No.ADC121S625CIMM/NOPB
TWD95.30
Each (On a Reel of 1000)
units
SAR 1 12-bit 200ksps Differential, Single Ended Voltage Surface Mount MSOP 8 ±1LSB Serial (SPI) - 5 V 3 x 3 x 0.86mm
RS Stock No. 639-4200
Mfr. Part No.ADC121S625CIMM/NOPB
TWD190.20
Each (In a Pack of 5)
units
SAR 1 12-bit 200ksps Differential, Single Ended Voltage Surface Mount MSOP 8 ±1LSB Serial (SPI) - 5 V 3 x 3 x 0.86mm
RS Stock No. 796-8868
Mfr. Part No.AD7091RBRMZ
TWD215.50
Each (In a Pack of 2)
units
SAR 1 12-bit 1Msps Single Ended Voltage Surface Mount MSOP 10 ±1LSB Serial (SPI/QSPI/Microwire) Single 2.7 → 5.25 V 3.1 x 3.1 x 0.95mm
RS Stock No. 884-6980
Mfr. Part No.LTC1407AIMSE#PBF
TWD678.00
Each
units
- 2 14-bit 3Msps Differential Current, Voltage Surface Mount MSOP 10 4LSB Serial (SPI) Single 4 V 3 x 3 x 0.86mm