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. 662-0120
Mfr. Part No.ADS8509IDW
SGD33.38
Each
units
SAR 1 16-bit 250ksps Single Ended Voltage Surface Mount SOIC 20 ±3LSB Serial (SPI) - 5 V 12.8 x 7.52 x 2.35mm
RS Stock No. 158-0496
Mfr. Part No.AD7276BUJZ-500RL7
SGD8.431
Each (On a Reel of 500)
units
SAR 1 12-bit 3000ksps Single Ended Voltage Surface Mount TSOT 6 ±1LSB Serial (SPI/QSPI/Microwire) - 2.5 V, 3.3 V 2.9 x 1.6 x 0.87mm
RS Stock No. 412-377
Mfr. Part No.AD7794BRUZ
SGD19.59
Each
units
Delta Sigma 6 24-bit 0.47ksps Differential Voltage Surface Mount TSSOP 24 ±15ppm FSR Serial (SPI) - 3.3 V, 5 V 7.8 x 4.4 x 1.05mm
RS Stock No. 639-4238
Mfr. Part No.ADC124S021CIMM/NOPB
SGD5.408
Each (In a Pack of 5)
units
SAR 4 12-bit 200ksps Single Ended Voltage Surface Mount MSOP 10 -1.1/0.8LSB Serial (SPI/QSPI/Microwire) - 3.3 V, 5 V 3 x 3 x 0.86mm
RS Stock No. 786-9893
Mfr. Part No.LTC2440IGN#PBF
SGD21.14
Each
units
Delta Sigma 1 24-bit - Differential Voltage Surface Mount SOIC 16 15ppm Vref Serial (SPI/Microwire) Single 4.5 → 5.5 V 4.978 x 3.988 x 1.478mm
RS Stock No. 538-4189
Mfr. Part No.AD574AJNZ
SGD82.62
Each
units
SAR 1 12-bit - Single Ended Voltage Through Hole PDIP 28 ±1LSB Parallel - - 39.75 x 14.73 x 4.95mm
RS Stock No. 504-4718
Mfr. Part No.ADC78H90CIMT/NOPB
SGD11.75
Each
units
SAR 8 12-bit 500ksps Single Ended Voltage Surface Mount TSSOP 16 ±1LSB Serial (SPI/QSPI/Microwire) - 3.3 V, 5 V 5 x 4.4 x 0.9mm
RS Stock No. 538-6646
Mfr. Part No.AD7738BRUZ
SGD26.24
Each
units
Delta Sigma 8 24-bit 3050ksps Differential, Single Ended Voltage Surface Mount TSSOP 28 ±0.002%FSR Serial (SPI) - 5 V 9.7 x 4.4 x 1.05mm
RS Stock No. 709-6676
Mfr. Part No.AD7794CRUZ
SGD21.80
Each
units
Delta Sigma 6 24-bit 0.47ksps Differential Voltage Surface Mount TSSOP 24 ±15ppm FSR Serial (SPI) - 3.3 V, 5 V 7.8 x 4.4 x 1.05mm
RS Stock No. 506-3898
Mfr. Part No.LTC2428CG#PBF
SGD19.34
Each
units
Delta Sigma 8 20-bit 0.008ksps Single Ended Voltage Surface Mount SSOP 28 20ppm Vref Serial (SPI) - 3.3 V, 5 V 10.5 x 5.6 x 2mm
RS Stock No. 506-1454
Mfr. Part No.LTC1859CG#PBF
SGD53.58
Each
units
SAR 8 16-bit 100ksps Differential, Single Ended Voltage Surface Mount SSOP 28 ±3LSB Serial (SPI/Microwire) - 5 V 10.5 x 5.6 x 2mm
RS Stock No. 709-6168
Mfr. Part No.AD7190BRUZ
SGD20.90
Each
units
Delta Sigma 5 24-bit 4.8ksps Differential, Pseudo Differential Voltage Surface Mount TSSOP 24 ±15ppm FSR Serial (SPI) - 5 V 7.8 x 4.4 x 1.05mm
RS Stock No. 162-8052
Mfr. Part No.ADS1018IDGST
SGD3.73
Each (On a Reel of 250)
units
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
RS Stock No. 806-5579
Mfr. Part No.AD7193BRUZ
SGD18.95
Each
units
Delta Sigma 8 24-bit - Single Ended Voltage Surface Mount TSSOP 28 ±30ppm FSR Serial (SPI/Microwire) Single 2.7 to 5.25 V 9.8 x 4.5 x 1.05mm
RS Stock No. 697-7391
Mfr. Part No.AD9200ARSZ
SGD10.84
Each
units
Pipelined 1 10-bit 20000ksps Differential, Single Ended Voltage Surface Mount SSOP 28 ±2LSB Parallel - 3 V 10.2 x 5.3 x 1.75mm
RS Stock No. 506-1662
Mfr. Part No.LTC2418CGN#PBF
SGD22.56
Each
units
Delta Sigma 16 24-bit 0.008ksps Differential, Single Ended Voltage Surface Mount SSOP 28 14ppm Vref Serial (SPI) - 3.3 V, 5 V 9.98 x 3.99 x 1.5mm
RS Stock No. 412-399
Mfr. Part No.AD7705BRUZ
SGD17.38
Each
units
Delta Sigma 2 16-bit 0.5ksps Differential Voltage Surface Mount TSSOP 16 ±0.003%FSR Serial (SPI) - 3 V, 5 V 5 x 4.4 x 1.05mm
RS Stock No. 697-7161
Mfr. Part No.AD7994BRUZ-0
SGD14.91
Each
units
SAR 4 12-bit 188ksps Single Ended Voltage Surface Mount TSSOP 16 ±1LSB Serial (I2C) - 3.3 V, 5 V 5 x 4.4 x 1.05mm
RS Stock No. 716-5810
Mfr. Part No.CS5343-CZZ
SGD6.56
Each
units
Delta Sigma 2 24-bit 96ksps Single Ended Voltage Surface Mount TSSOP 10 - Serial Single 3.3 V, 5 V 3 x 3 x 0.95mm
RS Stock No. 169-8385
Mfr. Part No.CS5343-CZZ
SGD5.891
Each (In a Tray of 96)
units
Delta Sigma 2 24-bit 96ksps Single Ended Voltage Surface Mount TSSOP 10 - Serial Single 3.3 V, 5 V 3 x 3 x 0.95mm