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. 506-1432
Mfr. Part No.LTC1857CG#PBF
SGD34.31
Each
units
SAR 8 12-bit 100ksps Differential, Single Ended Voltage Surface Mount SSOP 28 ±1LSB Serial (SPI/Microwire) - 5 V 10.5 x 5.6 x 2mm
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. 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. 522-9559
Mfr. Part No.AD7582KNZ
SGD122.10
Each
units
SAR 4 12-bit 10ksps Single Ended Voltage Through Hole PDIP 28 - Parallel - - 36.83 x 13.97 x 4.07mm
RS Stock No. 121-8506
Mfr. Part No.ADS7822U
SGD6.961
Each (In a Tube of 75)
units
- - - - - - - - - - - - - -
RS Stock No. 757-8131
Mfr. Part No.LTC2202CUK#PBF
SGD69.22
Each
units
Pipelined 1 16-bit 10Msps Differential, Single Ended Voltage Surface Mount QFN 48 ±4.5LSB Parallel Single 3.3 V 7 x 7 x 0.7mm
RS Stock No. 709-1618
Mfr. Part No.AD7894ARZ-2
SGD30.06
Each
units
SAR 1 14-bit 200ksps Single Ended Voltage Surface Mount SOIC 8 ±2LSB Serial - 5 V 5 x 4 x 1.5mm
RS Stock No. 877-8760
Mfr. Part No.AD7853ARZ
SGD33.07
Each
units
SAR 1 12-bit 200ksps Pseudo Differential Voltage Surface Mount SOIC 24 ±1LSB Serial (SPI/QSPI/Microwire) Single 3 to 5.5 V 15.45 x 7.6 x 2.186mm
RS Stock No. 162-5922
Mfr. Part No.TLV2542ID
SGD19.42
Each (In a Tube of 75)
units
SAR 2 12-bit 200ksps Single Ended Voltage Surface Mount SOIC 8 ±1LSB Serial (SPI) - 3.3 V 4.9 x 3.91 x 1.58mm
RS Stock No. 661-9903
Mfr. Part No.ADS1216Y/250
SGD28.40
Each
units
Delta Sigma 8 24-bit 780ksps Pseudo Differential, Single Ended Voltage Surface Mount TQFP 48 ±0.002%FSR Serial (SPI) - 3 V, 5 V 7 x 7 x 1mm
RS Stock No. 190-4597
Mfr. Part No.MAX11613EUA+
SGD3.416
Each (In a Tube of 50)
units
SAR 4 12 bit 94.4ksps - Analogue Surface Mount μMAX 8 ±1LSB - Single 2.7 to 3.6 V 3.1 x 3.1 x 0.95mm
RS Stock No. 538-6501
Mfr. Part No.AD7910ARMZ
SGD8.53
Each
units
SAR 1 10-bit 250ksps Single Ended Voltage Surface Mount MSOP 8 ±0.5LSB Serial (SPI/QSPI/Microwire) - 2.5 V, 3.3 V, 5 V 3 x 3 x 0.85mm
RS Stock No. 162-5787
Mfr. Part No.ADS1211E
SGD39.44
Each (In a Tube of 50)
units
Delta Sigma 4 24-bit 16ksps Differential, Single Ended Voltage Surface Mount SSOP 28 ±0.002%FSR Serial (SPI) - 5 V 10.2 x 5.3 x 1.95mm
RS Stock No. 759-2121
Mfr. Part No.AD9984AKSTZ-140
SGD19.80
Each
units
Pipelined 3 10 bit 140Msps Differential Voltage Surface Mount LQFP 80 ±9LSB Serial Single 1.8 V 14.2 x 14.2 x 1.45mm
RS Stock No. 146-2401
Mfr. Part No.ICL7136CM44Z
SGD7.56
Each (In a Tray of 96)
units
Dual Slope 1 3.5 digit 0.003ksps Differential Voltage Surface Mount MQFP 44 ±1Counts - - 9 V 10.12 x 10.1 x 2.1mm
RS Stock No. 427-036
Mfr. Part No.AD7711ARZ
SGD63.40
Each
units
Delta Sigma 2 24-bit 19.5ksps Differential, Single Ended Voltage Surface Mount SOIC W 24 ±0.003%FSR Serial - 5 V, 10 V 15.6 x 7.6 x 2.35mm
RS Stock No. 103-9933
Mfr. Part No.MAX1239EEE+
SGD16.314
Each (In a Tube of 100)
units
SAR 12 12-bit 94.4ksps Differential Voltage Surface Mount QSOP 16 ±1LSB Serial (I2C) Single 2.7 to 3.6 V 4.98 x 3.99 x 1.55mm
RS Stock No. 724-0283
Mfr. Part No.MCP3550-50E/SN
BrandMicrochip
SGD6.00
Each
units
Delta Sigma 1 22-bit 0.013ksps Differential Voltage Surface Mount SOIC 8 6ppm FSR Serial (SPI) Single 2.7 → 5.5 V 4.9 x 3.9 x 1.25mm
New
RS Stock No. 216-2702
Mfr. Part No.ISOSD61L
SGD6.654
Each (In a Tube of 49)
units
- 1 16 bit 25Msps Single Ended - Surface Mount SO16W 18 - - - - -
RS Stock No. 517-2087
Mfr. Part No.TLC2543CN
SGD21.47
Each
units
SAR 11 12-bit 66ksps Single Ended Voltage Through Hole PDIP 20 ±1LSB Serial (SPI) - 5 V 24.33 x 6.35 x 4.57mm