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. 545-6060
Mfr. Part No.LTC1298CN8#PBF
SGD19.14
Each
units
SAR 2 12-bit 11.1ksps Differential, Single Ended Voltage Through Hole PDIP 8 ±2LSB Serial - 5 V 10.16 x 6.48 x 3.3mm
RS Stock No. 121-8506
Mfr. Part No.ADS7822U
SGD6.961
Each (In a Tube of 75)
units
- - - - - - - - - - - - - -
RS Stock No. 915-6480
Mfr. Part No.AD7403-8BRIZ
SGD11.28
Each
units
Delta Sigma - - - - - Surface Mount SOIC 8 - - - - 7.6 x 6.05 x 2.35mm
RS Stock No. 379-2364
Mfr. Part No.MCP3201-BI/P
BrandMicrochip
SGD4.558
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. 796-9177
Mfr. Part No.AD9628BCPZ-105
SGD74.19
Each
units
Pipelined 2 12-bit 105Msps Differential Voltage Surface Mount LFCSP 64 ±0.75LSB Serial (SPI) Single 1.7 → 1.9 V 9 x 8.75 x 0.95mm
RS Stock No. 758-9910
Mfr. Part No.AD7892ARZ-1
SGD52.48
Each
units
SAR 1 12-bit 500ksps Single Ended Voltage Surface Mount SOIC 24 ±1.5LSB Parallel, Serial Single 5 V 15.6 x 7.6 x 2.35mm
RS Stock No. 159-9374
Mfr. Part No.AD9628BCPZ-105
SGD58.548
Each (In a Tray of 260)
units
Pipelined 2 12-bit 105Msps Differential Voltage Surface Mount LFCSP 64 ±0.75LSB Serial (SPI) Single 1.7 to 1.9 V 9 x 8.75 x 0.95mm
RS Stock No. 218-8528
Mfr. Part No.ADS7805UB
SGD119.10
Each
units
SAR 1 16-bit 100ksps Single Ended Voltage Surface Mount SOIC 28 ±3LSB Parallel - 5 V 18 x 7.52 x 2.35mm
RS Stock No. 884-2607
Mfr. Part No.LTC2309IUF#PBF
SGD13.03
Each
units
SAR 8 12-bit 1ksps Differential Current, Voltage Surface Mount DFN 10 ±1LSB Serial (I2C) Single 4.75 to 5.25 V 4 x 2.45 x 0.75mm
RS Stock No. 522-8916
Mfr. Part No.AD7575JNZ
SGD29.87
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
RS Stock No. 681-1095
Mfr. Part No.MCP3001-I/SN
BrandMicrochip
SGD2.71
Each (In a Pack of 2)
units
SAR 1 10-bit 200ksps Pseudo Differential Voltage Surface Mount SOIC 8 ±1LSB Serial (SPI) - 5 V 4.9 x 3.9 x 1.25mm
RS Stock No. 497-0199
Mfr. Part No.AD7476ABRMZ
SGD18.20
Each
units
SAR 1 12-bit 1000ksps Single Ended Voltage Surface Mount MSOP 8 ±1.5LSB Serial (SPI/QSPI/Microwire) - 2.5 V, 3.3 V, 5 V 3 x 3 x 0.85mm
RS Stock No. 165-4833
Mfr. Part No.MCP3201-BI/P
BrandMicrochip
SGD3.78
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. 759-1045
Mfr. Part No.AD7607BSTZ
SGD37.99
Each
units
SAR 8 14-bit 200ksps Single Ended Voltage Surface Mount LQFP 64 ±0.5LSB Parallel, Serial Single 5 V 10.2 x 10.2 x 1.45mm
RS Stock No. 111-2219
Mfr. Part No.AD7819YNZ
SGD10.09
Each (In a Tube of 25)
units
SAR 1 8-bit 200ksps Single Ended Voltage Through Hole PDIP 16 ±0.5LSB Parallel - 3 V, 5 V 20.07 x 6.35 x 3.3mm
RS Stock No. 796-8861
Mfr. Part No.AD7988-1BRMZ
SGD18.61
Each
units
SAR 1 16-bit 100ksps Pseudo Differential Voltage Surface Mount MSOP 10 ±1.25LSB Serial (SPI/QSPI/Microwire) Single 1.8 V, 2.5 V, 3 V, 5 V 3.1 x 3.1 x 0.95mm
RS Stock No. 889-5657
Mfr. Part No.MCP3208-CI/P
BrandMicrochip
SGD4.956
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. 412-668
Mfr. Part No.AD7705BRZ
SGD17.87
Each
units
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
RS Stock No. 162-4132
Mfr. Part No.ADS7805UB
SGD113.18
Each (In a Tube of 20)
units
SAR 1 16-bit 100ksps Single Ended Voltage Surface Mount SOIC 28 ±3LSB Parallel - 5 V 18 x 7.52 x 2.35mm
RS Stock No. 162-6487
Mfr. Part No.ADC1173CIMTC/NOPB
SGD5.11
Each (In a Tube of 61)
units
- 1 8-bit 15Msps Single Ended Voltage Surface Mount TSSOP 24 ±1.3LSB Parallel Single 2.7 to 3.6 V 7.9 x 4.5 x 1.05mm