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. 798-4889
Mfr. Part No.MAX186DEWP+
SGD25.796
Each (In a Tube of 36)
units
SAR 8 12-bit 133kHz Differential, Single Ended Voltage Surface Mount SOIC 20 ±3LSB Serial (SPI/QSPI/Microwire) Dual, Single 5 V 13 x 7.6 x 2.35mm
RS Stock No. 191-3624
Mfr. Part No.MAX147BEAP+
SGD24.25
Each
units
SAR 8 12 bit 133ksps Differential, Single Ended Differential, Single Ended Surface Mount SSOP 20 ±1LSB 4-Wire SPI, Micro Wire, QSPI, Serial Single 2.7 to 5.25 V 7.33 x 5.38 x 1.78mm
RS Stock No. 190-5033
Mfr. Part No.MAX11644EUA+
SGD3.36
Each (In a Pack of 5)
units
SAR 2 12 bit 94.4ksps Differential, Single Ended Differential, Single Ended Surface Mount μMAX 8 ±1LSB - Single 4.5 to 5.5 V 3.1 x 3.1 x 0.95mm
RS Stock No. 191-3786
Mfr. Part No.MAX11214EUG+
SGD50.35
Each
units
Delta Sigma 1 24 bit 32ksps - Analogue Surface Mount TSSOP 24 4ppm Serial-SPI Dual, Single 2.7 to 3.6 V 7.9 x 4.5 x 0.95mm
RS Stock No. 191-4864
Mfr. Part No.MAX1270BCNG+
SGD48.45
Each
units
SAR 8 12 bit 110ksps Single Ended - Through Hole PDIP 16 ±1LSB - Single 4.75 to 5.25 V 19.43 x 7.87 x 4.45mm
RS Stock No. 191-4254
Mfr. Part No.MAX146BCAP+
SGD20.447
Each (In a Tube of 66)
units
SAR 8 12 bit 133ksps Differential, Single Ended Differential, Single Ended Surface Mount SSOP 20 ±1LSB - Single 2.7 to 3.6 V 7.33 x 5.38 x 1.78mm
RS Stock No. 191-4252
Mfr. Part No.MAX1270BCNG+
SGD42.189
Each (In a Tube of 15)
units
SAR 8 12 bit 110ksps Single Ended - Through Hole PDIP 16 ±1LSB - Single 4.75 to 5.25 V 19.43 x 7.87 x 4.45mm
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. 189-9026
Mfr. Part No.MAX197BCWI+
SGD35.17
Each
units
SAR 8 12-bit 100ksps Single Ended Voltage Surface Mount SOIC W 28 ±1LSB Parallel - 5 V 18.1 x 7.6 x 2.35mm
RS Stock No. 189-9000
Mfr. Part No.MAX197BCAI+
SGD35.17
Each
units
SAR 8 12-bit 100ksps Single Ended Voltage Surface Mount SSOP 28 ±1LSB Parallel Single 5 V 10.33 x 5.38 x 1.78mm
RS Stock No. 146-1122
Mfr. Part No.MAX118CPI+
SGD14.47
Each (In a Tube of 14)
units
Semi Flash 8 8-bit 1000ksps Single Ended Voltage Through Hole PDIP 28 - Parallel - 5 V 37.34 x 14.61 x 4.45mm
RS Stock No. 798-4898
Mfr. Part No.MAX192BCWP+
SGD21.247
Each (In a Tube of 36)
units
SAR 8 10-bit 133kHz Differential, Single Ended Voltage Surface Mount SOIC 20 ±1LSB Serial (SPI/QSPI/Microwire) Single 5 V 13 x 7.6 x 2.35mm
RS Stock No. 190-5054
Mfr. Part No.MAX132CWG+
SGD24.84
Each
units
- 1 18 bit 0.1ksps - Analogue Surface Mount SO 24 ±0.006%FSR 4-Wire Serial Single 4.5 to 5.5 V 15.6 x 7.6 x 2.35mm
RS Stock No. 191-4770
Mfr. Part No.MAX196ACWI+
SGD46.93
Each
units
SAR 6 12 bit 100ksps Single Ended - Surface Mount SOIC 28 ±1LSB Parallel Single 4.75 to 5.25 V 18.1 x 7.6 x 2.35mm
RS Stock No. 189-7395
Mfr. Part No.MAX187BCPA+
SGD36.411
Each (In a Tube of 50)
units
SAR 1 12-bit 75ksps Single Ended Voltage Through Hole PDIP 8 ±1LSB Serial (SPI) - 5 V 9.91 x 7.87 x 4.45mm
RS Stock No. 192-1614
Mfr. Part No.MAX1202ACAP+
SGD25.83
Each
units
SAR 8 12-bit 133ksps Pseudo Differential, Single Ended Voltage Surface Mount SSOP 20 ±0.5LSB Serial (SPI) - 5 V 7.33 x 5.38 x 1.78mm
RS Stock No. 798-7614
Mfr. Part No.MAX186DEWP+
SGD31.81
Each
units
SAR 8 12-bit 133kHz Differential, Single Ended Voltage Surface Mount SOIC 20 ±3LSB Serial (SPI/QSPI/Microwire) Dual, Single 5 V 13 x 7.6 x 2.35mm
RS Stock No. 189-9331
Mfr. Part No.MAX186DCPP+
SGD40.64
Each
units
SAR 8 12-bit 133ksps Differential, Pseudo Differential, Single Ended Voltage Through Hole PDIP 20 ±1LSB Serial (SPI/QSPI/Microwire) - 5 V 26.54 x 7.87 x 4.45mm
RS Stock No. 192-1508
Mfr. Part No.MAX1136EUA+
SGD12.565
Each (In a Pack of 2)
units
SAR 4 10-bit 94.4ksps Differential Voltage Surface Mount μSOP 8 ±1LSB Serial (I2C) Single 4.5 to 5.5 V 3.05 x 3.05 x 0.95mm
RS Stock No. 189-7389
Mfr. Part No.MAX1270BCAI+
SGD29.789
Each (In a Tube of 46)
units
SAR 8 12-bit 110ksps Single Ended Voltage Surface Mount SSOP 28 ±1LSB Serial (SPI) Single 5 V 10.33 x 5.38 x 1.78mm