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庫存編號 538-4943
製造零件編號AD7787BRMZ
HK$98.29
單位
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庫存編號 169-0150
製造零件編號SI8900B-A01-GS
HK$24.732
毎管:46 個
單位
SAR 3 10-bit - - Current, Voltage Surface Mount SOIC W 16 ±1LSB Serial Single 2.7 to 3.6 V 10.3 x 7.5 x 2.35mm
RS庫存編號 504-4724
製造零件編號ADCS7476AIMF/NOPB
HK$31.448
/個 (每包:5個)
單位
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庫存編號 911-5713
製造零件編號MCP3008-I/SL
BrandMicrochip
HK$18.443
毎管:50 個
單位
SAR 8 10-bit 200ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 16 ±1LSB Serial (SPI) - 5 V 9.9 x 3.9 x 1.25mm
RS庫存編號 121-8294
製造零件編號ADS7866IDBVT
HK$22.638
個 (在毎卷:250)
單位
SAR 1 12-bit 200ksps Single Ended Voltage Surface Mount SOT-23 6 ±1.5LSB Serial (SPI) - 1.8 V, 2.5 V, 3.3 V 2.9 x 1.6 x 1.15mm
RS庫存編號 100-3885
製造零件編號ADCS7476AIMF/NOPB
HK$30.818
個 (在毎卷:1000)
單位
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庫存編號 389-255
製造零件編號ADS7866IDBVT
HK$36.20
單位
SAR 1 12-bit 200ksps Single Ended Voltage Surface Mount SOT-23 6 ±1.5LSB Serial (SPI) - 1.8 V, 2.5 V, 3.3 V 2.9 x 1.6 x 1.15mm
RS庫存編號 639-4216
製造零件編號ADC122S021CIMM/NOPB
HK$22.376
/個 (每包:5個)
單位
SAR 2 12-bit 200ksps Single Ended Voltage Surface Mount MSOP 8 -1.1/0.8LSB Serial (SPI/QSPI/Microwire) - 3.3 V, 5 V 3 x 3 x 0.86mm
RS庫存編號 160-9914
製造零件編號AD7170BCPZ-500RL7
HK$14.626
個 (在毎卷:500)
單位
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庫存編號 911-5791
製造零件編號MCP3208-BI/SL
BrandMicrochip
HK$36.696
毎管:50 個
單位
SAR 8 12-bit 100ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 16 ±1LSB Serial (SPI) Single 2.7 to 5.5 V 9.9 x 3.9 x 1.5mm
RS庫存編號 709-4544
製造零件編號ADS1115IDGST
HK$58.04
單位
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庫存編號 102-5607
製造零件編號ADC122S021CIMM/NOPB
HK$14.32
個 (在毎卷:1000)
單位
SAR 2 12-bit 200ksps Single Ended Voltage Surface Mount MSOP 8 -1.1/0.8LSB Serial (SPI/QSPI/Microwire) - 3.3 V, 5 V 3 x 3 x 0.86mm
RS庫存編號 912-2815
製造零件編號MCP3204-CI/SL
BrandMicrochip
HK$26.758
毎管:57 個
單位
SAR 4 12-bit 100ksps Pseudo Differential, Single Ended Voltage Surface Mount SOIC 14 ±2LSB Serial (SPI) - 5 V 8.65 x 3.9 x 1.25mm
RS庫存編號 162-6121
製造零件編號ADS7924IRTET
HK$19.355
個 (在毎卷:250)
單位
SAR 4 12-bit 100ksps Differential Voltage Surface Mount WQFN 16 ±1.5LSB Serial (SPI) Single 5 V 3.15 x 3.15 x 0.8mm
RS庫存編號 823-2139
製造零件編號Si8900B-A01-GS
HK$24.50
/個 (每包:5個)
單位
SAR 3 10-bit - - Current, Voltage Surface Mount SOIC W 16 ±1LSB Serial Single 2.7 to 3.6 V 10.3 x 7.5 x 2.35mm
RS庫存編號 709-6575
製造零件編號AD7685CRMZ
HK$181.65
單位
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庫存編號 669-6054
製造零件編號MCP3002-I/P
BrandMicrochip
HK$17.705
/個 (每包:2個)
單位
SAR 2 10-bit 200ksps Pseudo Differential, Single Ended Voltage Through Hole PDIP 8 ±1LSB Serial (SPI) - 5 V 9.27 x 6.35 x 3.3mm
RS庫存編號 757-8137
製造零件編號LTC2309CF#PBF
HK$69.10
單位
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庫存編號 850-7792
製造零件編號AD7170BCPZ-500RL7
HK$25.872
/個 (每包:5個)
單位
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庫存編號 732-1648
製造零件編號ADS7924IRTET
HK$29.02
單位
SAR 4 12-bit 100ksps Differential Voltage Surface Mount WQFN 16 ±1.5LSB Serial (SPI) Single 5 V 3.15 x 3.15 x 0.8mm