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 Prix 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
N° de stock RS 159-6625
Référence fabricantMCP3004-I/SL
MarqueMicrochip
1,465 €
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SAR 4 10-bit 200ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 14 ±1LSB Serial (SPI) - 5 V 8.65 x 3.9 x 1.25mm
N° de stock RS 669-6067
Référence fabricantMCP3004-I/P
MarqueMicrochip
1,93 €
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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
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Référence fabricantADS8505IBDW
20,205 €
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SAR 1 16-bit 250ksps Single Ended Voltage Surface Mount SOIC 28 ±1.5LSB Parallel - 5 V 18 x 7.52 x 2.35mm
N° de stock RS 660-7587
Référence fabricantADS8505IBDW
21,90 €
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SAR 1 16-bit 250ksps Single Ended Voltage Surface Mount SOIC 28 ±1.5LSB Parallel - 5 V 18 x 7.52 x 2.35mm
N° de stock RS 165-3552
Référence fabricantMCP3553-E/MS
MarqueMicrochip
2,575 €
Each (In a Tube of 100)
Unité
Delta Sigma 1 22-bit 0.06ksps Differential Voltage Surface Mount MSOP 8 6ppm FSR Serial (SPI) Single 2.7 to 5.5 V 3 x 3 x 0.95mm
N° de stock RS 162-8052
Référence fabricantADS1018IDGST
1,942 €
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Delta Sigma 4 12-bit 3.3ksps Differential, Single Ended Voltage Surface Mount VSSOP 10 0.5LSB Serial (SPI) Single 2 to 5.5 V 3.1 x 3.1 x 0.95mm
N° de stock RS 889-5320
Référence fabricantMCP3221A5T-I/OT
MarqueMicrochip
1,089 €
Each (On a Reel of 3000)
Unité
SAR 1 12-bit 22.3ksps Single Ended Voltage Surface Mount SOT-23 23 ±2LSB Serial (I2C) Single 2.7 to 5.5 V 3.1 x 1.75 x 1.3mm
N° de stock RS 412-668
Référence fabricantAD7705BRZ
9,17 €
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Delta Sigma 2 16-bit 0.5ksps Differential Voltage Surface Mount SOIC W 16 ±0.003%FSR Serial (SPI) - 3 V, 5 V 10.5 x 7.6 x 2.35mm
N° de stock RS 669-6098
Référence fabricantMCP3425A0T-E/CH
MarqueMicrochip
1,935 €
Each (In a Pack of 2)
Unité
Delta Sigma 1 16-bit 0.015ksps Differential, Single Ended Voltage Surface Mount SOT-23 6 10ppm FSR Serial (I2C) - 5 V 3.1 x 1.8 x 1.3mm
N° de stock RS 121-8998
Référence fabricantADC121S101CIMF/NOPB
2,069 €
Each (On a Reel of 1000)
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SAR 1 12-bit 1000ksps Single Ended Voltage Surface Mount SOT-23 6 -1.1/1LSB Serial (SPI) - 3.3 V, 5 V 2.92 x 1.6 x 1.02mm
N° de stock RS 851-4639
Référence fabricantLTC2486IDE#PBF
5,87 €
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Delta Sigma 4 16-bit 15sps Differential Voltage Surface Mount DFN 14 20ppm Vref Serial (SPI) Single 2.7 to 5.5 V 4 x 3 x 0.75mm
N° de stock RS 121-8571
Référence fabricantTLC2543CDW
10,294 €
Each (In a Tube of 25)
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N° de stock RS 523-8446
Référence fabricantAD7705BNZ
9,66 €
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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
N° de stock RS 378-1768
Référence fabricantADS7844E
8,18 €
Each
Unité
SAR 8 12-bit 200ksps Differential, Single Ended Voltage Surface Mount SSOP 20 ±2LSB Serial (SPI) - 5 V 8.75 x 4 x 1.5mm
N° de stock RS 703-7949
Référence fabricantMCP3427-E/UN
MarqueMicrochip
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Delta Sigma 2 16-bit 0.015ksps Differential Voltage Surface Mount MSOP 10 10ppm FSR Serial (I2C) Single 2.7 to 5.5 V 3 x 3 x 0.95mm
N° de stock RS 538-6494
Référence fabricantAD7734BRUZ
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Delta Sigma 4 24-bit 3050ksps Single Ended Voltage Surface Mount TSSOP 28 ±0.005%FSR Serial (SPI) - 5 V 9.7 x 4.4 x 1.05mm
N° de stock RS 809-9317
Référence fabricantAD7920AKSZ-500RL7
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SAR 1 12-bit 250ksps Single Ended Voltage Surface Mount SC-70 6 ±0.75LSB Serial (SPI/QSPI/Microwire) Single 2.35 to 5.25 V 2.2 x 1.35 x 1mm
N° de stock RS 887-7287
Référence fabricantMCP3425A0T-E/CH
MarqueMicrochip
1,399 €
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Delta Sigma 1 16-bit 0.015ksps Differential, Single Ended Voltage Surface Mount SOT-23 6 10ppm FSR Serial (I2C) - 5 V 3.1 x 1.8 x 1.3mm
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Référence fabricantADC121S101CIMF/NOPB
3,90 €
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SAR 1 12-bit 1000ksps Single Ended Voltage Surface Mount SOT-23 6 -1.1/1LSB Serial (SPI) - 3.3 V, 5 V 2.92 x 1.6 x 1.02mm
N° de stock RS 770-9748
Référence fabricantMCP3001-I/P
MarqueMicrochip
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Each (In a Pack of 3)
Unité
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