Analogue to Digital Converters

Analogue to digital converters (ADCs) are devices that convert input analogue signals into a digital such output as a sound captured from a microphone or light entering a digital camera, into a digital signal.

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. 162-8052
Mfr. Part No.ADS1018IDGST
SGD3.351
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. 697-7391
Mfr. Part No.AD9200ARSZ
SGD9.92
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. 709-6676
Mfr. Part No.AD7794CRUZ
SGD20.53
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. 758-9816
Mfr. Part No.AD7656BSTZ-1
SGD37.16
Each
units
SAR 6 16-bit 250ksps Single Ended Voltage Surface Mount LQFP 64 ±3LSB Parallel, Serial Dual - 10.2 x 10.2 x 1.45mm
RS Stock No. 165-4833
Mfr. Part No.MCP3201-BI/P
BrandMicrochip
SGD3.233
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. 796-8861
Mfr. Part No.AD7988-1BRMZ
SGD17.51
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. 538-7497
Mfr. Part No.AD7671ASTZ
SGD76.31
Each
units
SAR 1 16-bit 1000ksps Single Ended Voltage Surface Mount LQFP 48 ±2.5LSB Serial - 5 V 7 x 7 x 1.4mm
RS Stock No. 497-0199
Mfr. Part No.AD7476ABRMZ
SGD16.68
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. 709-4541
Mfr. Part No.ADS1114IDGST
SGD8.26
Each
units
Delta Sigma 1 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. 207-0269
Mfr. Part No.TC7107CPL
BrandMicrochip
SGD6.77
Each
units
Dual Slope 1 3.5 digit - Differential, Single Ended Voltage Through Hole PDIP 40 ±1Counts BCD Output - - 53.21 x 14.73 x 4.95mm
RS Stock No. 159-6631
Mfr. Part No.MCP3001-I/SN
BrandMicrochip
SGD1.843
Each (In a Tube of 100)
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. 923-6911
Mfr. Part No.ADS1115IDGST
SGD5.65
Each (On a Reel of 250)
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. 709-6588
Mfr. Part No.AD7701ARZ
SGD55.59
Each
units
Delta Sigma 1 16-bit 4ksps Single Ended Voltage Surface Mount SOIC W 20 ±0.003%FSR Serial - - 13 x 7.6 x 2.35mm
RS Stock No. 379-2364
Mfr. Part No.MCP3201-BI/P
BrandMicrochip
SGD4.09
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. 697-7066
Mfr. Part No.AD7686BRMZ
SGD37.19
Each
units
SAR 1 16-bit 500ksps Pseudo Differential Voltage Surface Mount MSOP 10 ±3LSB Serial (SPI/QSPI/Microwire) - 5 V 3 x 3 x 0.85mm
RS Stock No. 506-1432
Mfr. Part No.LTC1857CG#PBF
SGD33.31
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. 111-2219
Mfr. Part No.AD7819YNZ
SGD9.507
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. 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
RS Stock No. 545-6060
Mfr. Part No.LTC1298CN8#PBF
SGD17.20
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. 496-858
Mfr. Part No.ICL7107CM44Z
SGD8.53
Each
units
Dual Slope 1 3.5 digit 0.003ksps Differential Voltage Surface Mount MQFP 44 ±1Counts - - - 10.12 x 10.1 x 2.1mm
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