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. 523-8446
Mfr. Part No.AD7705BNZ
HK$107.77
Each
units
Delta Sigma 2 16-bit 0.5ksps Differential Voltage Through Hole PDIP 16 ±0.003%FSR Serial (SPI) - 3 V, 5 V 20.07 x 6.35 x 3.3mm
RS Stock No. 538-4943
Mfr. Part No.AD7787BRMZ
HK$98.29
Each
units
Delta Sigma 2 24-bit 0.12ksps Differential, Single Ended Voltage Surface Mount MSOP 10 ±15ppm FSR Serial (SPI) - 3.3 V, 5 V 3 x 3 x 0.85mm
RS Stock No. 160-9914
Mfr. Part No.AD7170BCPZ-500RL7
HK$14.626
Each (On a Reel of 500)
units
Delta Sigma 1 12-bit 125sps Differential Voltage Surface Mount LFCSP 10 ±0.1LSB Serial (SPI) Single 2.7 to 5.25 V 3.1 x 3.1 x 0.8mm
RS Stock No. 709-6575
Mfr. Part No.AD7685CRMZ
HK$181.65
Each
units
SAR 1 16-bit 250ksps Pseudo Differential Voltage Surface Mount MSOP 10 ±2LSB Serial (SPI/QSPI/Microwire) - 2.5 V, 3.3 V, 5 V 3 x 3 x 0.85mm
RS Stock No. 850-7792
Mfr. Part No.AD7170BCPZ-500RL7
HK$25.872
Each (In a Pack of 5)
units
Delta Sigma 1 12-bit 125sps Differential Voltage Surface Mount LFCSP 10 ±0.1LSB Serial (SPI) Single 2.7 to 5.25 V 3.1 x 3.1 x 0.8mm
RS Stock No. 757-8137
Mfr. Part No.LTC2309CF#PBF
HK$69.10
Each
units
SAR 8 12-bit 14ksps Differential, Single Ended Voltage Surface Mount TSSOP 20 ±1LSB Serial (I2C) Single 5 V 6.6 x 4.5 x 0.95mm
RS Stock No. 697-7155
Mfr. Part No.AD7892BRZ-1
HK$354.54
Each
units
SAR 1 12-bit 500ksps Single Ended Voltage Surface Mount SOIC W 24 ±1LSB Serial (SPI) - 5 V 15.6 x 7.6 x 2.35mm
RS Stock No. 523-8165
Mfr. Part No.AD7715ANZ-5
HK$141.88
Each
units
Delta Sigma 1 16-bit 19.2ksps Differential Voltage Through Hole PDIP 16 ±0.002%FSR Serial (SPI) - 5 V 20.07 x 6.35 x 3.3mm
RS Stock No. 697-7076
Mfr. Part No.AD7701ANZ
HK$358.76
Each
units
Delta Sigma 1 16-bit 4ksps Single Ended Voltage Through Hole PDIP 20 ±0.003%FSR Serial - - 24.51 x 7.24 x 3.43mm
RS Stock No. 506-1527
Mfr. Part No.LTC1867CGN#PBF
HK$163.32
Each
units
SAR 8 16-bit 200ksps Differential, Single Ended Voltage Surface Mount SSOP 16 ±4LSB Serial (SPI/Microwire) - 5 V 4.98 x 3.99 x 1.5mm
RS Stock No. 708-9542
Mfr. Part No.AD7682BCPZ
HK$122.23
Each
units
SAR 4 16-bit 250ksps Differential, Pseudo Differential, Single Ended Voltage Surface Mount LFCSP 20 ±1.5LSB Serial (SPI/QSPI/Microwire) - 2.5 V, 3.3 V, 5 V 4 x 4 x 0.83mm
RS Stock No. 697-7029
Mfr. Part No.AD7356BRUZ
HK$153.97
Each
units
SAR 2 12-bit 5000ksps Differential Voltage Surface Mount TSSOP 16 ±1LSB Serial (SPI/QSPI/Microwire) - 2.5 V 5 x 4.4 x 1.05mm
RS Stock No. 709-1618
Mfr. Part No.AD7894ARZ-2
HK$175.83
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. 759-1162
Mfr. Part No.AD7891ASZ-1
HK$293.80
Each
units
SAR 8 12-bit 454ksps Single Ended Voltage Surface Mount MQFP 44 ±1LSB Parallel, Serial Single 5 V 10 x 10 x 2.1mm
RS Stock No. 523-8216
Mfr. Part No.AD9220ARZ
HK$127.71
Each
units
Pipelined 1 12-bit 10000ksps Differential, Single Ended Voltage Surface Mount SOIC W 28 ±1.25LSB Parallel - 5 V 18.1 x 7.6 x 2.35mm
RS Stock No. 835-3822
Mfr. Part No.AD7091R-8BRUZ
HK$76.28
Each
units
SAR 8 12-bit 1Msps Single Ended Voltage Surface Mount TSSOP 24 ±1.25LSB Serial (SPI/QSPI/Microwire) Single 2.7 to 5.25 V 7.9 x 4.5 x 1.05mm
RS Stock No. 709-5008
Mfr. Part No.AD7894ARZ-3
HK$167.73
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. 709-6673
Mfr. Part No.AD7796BRUZ
HK$61.87
Each
units
Delta Sigma 1 16-bit 0.123ksps Differential Voltage Surface Mount TSSOP 16 ±10ppm FSR Serial (SPI) - 3.3 V, 5 V 5 x 4.4 x 1.05mm
RS Stock No. 144-6448
Mfr. Part No.AD4005BRMZ
HK$200.18
Each
units
SAR 1 16-bit 1Msps Differential Current, Voltage Surface Mount MSOP 10 ±0.4LSB DSP, Micro Wire, QSPI, SPI Single - 3.1 x 3.1 x 0.95mm
RS Stock No. 804-9848
Mfr. Part No.AD9484BCPZ-500
HK$535.79
Each
units
Pipelined 1 8-bit 500Msps Differential Voltage Surface Mount LFCSP 56 +0.15LSB Serial (SPI) Single 1.75 to 1.9 V 8.1 x 8.1 x 0.95mm