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. 162-8062
Mfr. Part No.ADS7884SDBVT
PHP152.764
Each (On a Reel of 250)
units
SAR 1 10-bit 3Msps Single Ended Voltage Surface Mount SOT-23 6 0.8LSB Serial (SPI) Single 3.3 V 3.05 x 1.75 x 1.3mm
RS Stock No. 709-4544
Mfr. Part No.ADS1115IDGST
PHP332.37
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. 162-5847
Mfr. Part No.PCM4202DBT
PHP356.48
Each (On a Reel of 250)
units
Delta Sigma 2 24 bit 216ksps Differential, Single Ended Voltage Surface Mount SSOP 28 - Serial - 5 V 10.2 x 5.3 x 1.95mm
RS Stock No. 651-1944
Mfr. Part No.ADC121S101CIMF/NOPB
PHP245.93
Each
units
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
RS Stock No. 162-4127
Mfr. Part No.ADC122S706CIMT
PHP388.932
Each (In a Tube of 94)
units
SAR 2 12-bit 1Msps Differential Voltage Surface Mount TSSOP 14 ±1LSB Serial (SPI/QSPI/Microwire) Single 4.5 to 5.5 V 5 x 4.4 x 0.9mm
RS Stock No. 533-8675
Mfr. Part No.ADC12130CIWM/NOPB
PHP613.28
Each
units
SAR 2 12-bit + Sign 114ksps Differential, Pseudo Differential Voltage Surface Mount SOIC W 16 ±2LSB Serial (SPI/QSPI/Microwire) - 3.3 V, 5 V 10.5 x 7.6 x 2.3mm
RS Stock No. 178-9100
Mfr. Part No.ADC0838CCWM/NOPB
PHP278.444
Each (In a Tube of 36)
units
SAR 8 8-bit 31ksps Differential, Pseudo Differential Voltage Surface Mount SOIC W 20 - Serial (SPI/Microwire) - 5 V 12.8 x 7.47 x 2.34mm
RS Stock No. 162-5917
Mfr. Part No.TLC5510AINS
PHP376.614
Each (In a Tube of 34)
units
Semi Flash 1 8 bit 20Msps Single Ended Voltage Surface Mount SOP 24 ±1LSB Parallel - 5 V 15 x 5.3 x 1.95mm
RS Stock No. 921-5068
Mfr. Part No.ADS1278IPAPT
PHP2,143.673
Each (On a Reel of 250)
units
Delta Sigma 8 24 bit 144ksps Differential, Single Ended Voltage Surface Mount HTQFP 64 ±0.0012%FSR Serial (SPI) - 5 V 10 x 10 x 1mm
RS Stock No. 662-0344
Mfr. Part No.TLC5510AINS
PHP436.81
Each
units
Semi Flash 1 8 bit 20Msps Single Ended Voltage Surface Mount SOP 24 ±1LSB Parallel - 5 V 15 x 5.3 x 1.95mm
RS Stock No. 162-4642
Mfr. Part No.ADC12130CIWM/NOPB
PHP528.392
Each (In a Tube of 45)
units
SAR 2 12-bit + Sign 114ksps Differential, Pseudo Differential Voltage Surface Mount SOIC W 16 ±2LSB Serial (SPI/QSPI/Microwire) - 3.3 V, 5 V 10.5 x 7.6 x 2.3mm
RS Stock No. 709-8751
Mfr. Part No.ADS1278IPAPT
PHP2,560.82
Each
units
Delta Sigma 8 24 bit 144ksps Differential, Single Ended Voltage Surface Mount HTQFP 64 ±0.0012%FSR Serial (SPI) - 5 V 10 x 10 x 1mm
RS Stock No. 545-7805
Mfr. Part No.PCM4202DB
PHP543.83
Each
units
Delta Sigma 2 24 bit 216ksps Differential, Single Ended Voltage Surface Mount SSOP 28 - Serial - 5 V 10.2 x 5.3 x 1.95mm
RS Stock No. 922-2568
Mfr. Part No.ADS1216Y/250
PHP621.282
Each (On a Reel of 250)
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. 921-5315
Mfr. Part No.ADS1118IDGST
PHP231.525
Each (On a Reel of 250)
units
Delta Sigma 4 16-bit 860sps Differential, Single Ended Voltage Surface Mount MSOP 10 1LSB Serial (SPI) Single 3.3 V 3.1 x 3.1 x 1.1mm
RS Stock No. 121-8998
Mfr. Part No.ADC121S101CIMF/NOPB
PHP155.473
Each (On a Reel of 1000)
units
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
RS Stock No. 162-4970
Mfr. Part No.ADC128S052CIMT/NOPB
PHP302.012
Each (In a Tube of 92)
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. 662-0032
Mfr. Part No.ADS1252U
PHP779.47
Each
units
Delta Sigma 1 24-bit 41ksps Differential, Single Ended Voltage Surface Mount SOIC 8 ±0.002%FSR Serial (SPI) - 5 V 4.9 x 3.91 x 1.58mm
RS Stock No. 145-7315
Mfr. Part No.PCM4202DB
PHP468.195
Each (In a Tube of 50)
units
Delta Sigma 2 24 bit 216ksps Differential, Single Ended Voltage Surface Mount SSOP 28 - Serial - 5 V 10.2 x 5.3 x 1.95mm
RS Stock No. 661-9903
Mfr. Part No.ADS1216Y/250
PHP942.57
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