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. 146-0198
Mfr. Part No.MCP3304-BI/SL
BrandMicrochip
MYR19.569
Each (In a Tube of 50)
units
SAR 4 13-bit 100ksps Differential, Single Ended Voltage Surface Mount SOIC 16 ±1LSB Serial (SPI) Single 4.5 to 5.5 V 9.9 x 3.9 x 1.5mm
RS Stock No. 669-6064
Mfr. Part No.MCP3008-I/P
BrandMicrochip
MYR10.555
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. 770-9779
Mfr. Part No.MCP3304-BI/SL
BrandMicrochip
MYR20.00
Each
units
SAR 4 13-bit 100ksps Differential, Single Ended Voltage Surface Mount SOIC 16 ±1LSB Serial (SPI) Single 4.5 → 5.5 V 9.9 x 3.9 x 1.5mm
RS Stock No. 889-5143
Mfr. Part No.MCP3008-I/P
BrandMicrochip
MYR8.757
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. 170-8171
Mfr. Part No.ICL7107CPLZ
MYR43.709
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. 669-6054
Mfr. Part No.MCP3002-I/P
BrandMicrochip
MYR8.62
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. 159-6624
Mfr. Part No.MCP3002-I/P
BrandMicrochip
MYR6.26
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. 709-6682
Mfr. Part No.AD7797BRUZ
MYR37.64
Each
units
Delta Sigma 1 24-bit 0.123ksps Differential Voltage Surface Mount TSSOP 16 ±10ppm FSR Serial (SPI) - 3.3 V, 5 V 5 x 4.4 x 1.05mm
RS Stock No. 709-4544
Mfr. Part No.ADS1115IDGST
MYR28.29
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. 923-6911
Mfr. Part No.ADS1115IDGST
MYR17.878
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. 697-7114
Mfr. Part No.AD7793BRUZ
MYR51.37
Each
units
Delta Sigma 3 24-bit 0.47ksps Differential Voltage Surface Mount TSSOP 16 ±15ppm FSR Serial (SPI) - 3.3 V, 5 V 5 x 4.4 x 1.05mm
RS Stock No. 761-5321
Mfr. Part No.ADC081S021CIMF/NOPB
MYR5.302
Each (In a Pack of 5)
units
SAR 1 8-bit 200ksps Single Ended Voltage Surface Mount SOT-23 6 ±0.3LSB Serial (SPI/QSPI/Microwire) Single 2.7 → 5.25 V 2.92 x 1.6 x 1.02mm
RS Stock No. 921-6774
Mfr. Part No.ADC081S021CIMF/NOPB
MYR4.82
Each (On a Reel of 1000)
units
SAR 1 8-bit 200ksps Single Ended Voltage Surface Mount SOT-23 6 ±0.3LSB Serial (SPI/QSPI/Microwire) Single 2.7 to 5.25 V 2.92 x 1.6 x 1.02mm
RS Stock No. 669-6086
Mfr. Part No.MCP3424-E/SL
BrandMicrochip
MYR16.44
Each
units
Delta Sigma 4 18-bit 0.004ksps Differential, Single Ended Voltage Surface Mount SOIC 14 35ppm FSR Serial (I2C) - 5 V 8.65 x 3.9 x 1.25mm
RS Stock No. 716-5860
Mfr. Part No.CS5530-ISZ
MYR29.73
Each
units
Delta Sigma 1 24-bit 3840sps Differential Voltage Surface Mount SSOP 20 ±0.003%FSR Serial (SPI) Dual, Single 5 V 7.5 x 5.6 x 1.88mm
RS Stock No. 423-737
Mfr. Part No.LTC2499CUHF#PBF
MYR35.09
Each
units
Delta Sigma 16 24-bit 0.008ksps Differential, Single Ended Voltage Surface Mount QFN 38 10ppm Vref Serial (I2C) - 3.3 V, 5 V 7 x 5 x 0.75mm
RS Stock No. 629-3129
Mfr. Part No.AD7687BRMZ
MYR95.91
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. 889-5180
Mfr. Part No.MCP3424-E/SL
BrandMicrochip
MYR13.849
Each (In a Tube of 57)
units
Delta Sigma 4 18-bit 0.004ksps Differential, Single Ended Voltage Surface Mount SOIC 14 35ppm FSR Serial (I2C) - 5 V 8.65 x 3.9 x 1.25mm
RS Stock No. 523-8446
Mfr. Part No.AD7705BNZ
MYR48.99
Each
units
Delta Sigma 2 16-bit 0.5ksps Differential Voltage Through Hole PDIP 16 ±0.003%FSR Serial (SPI) - 3 V, 5 V 20.07 x 6.35 x 3.3mm
RS Stock No. 522-8916
Mfr. Part No.AD7575JNZ
MYR88.36
Each
units
SAR 1 8-bit - Single Ended Voltage Through Hole PDIP 18 ±1LSB Parallel - 5 V 23.12 x 6.61 x 3.56mm