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. 758-9759
Mfr. Part No.AD7266BCPZ
SGD16.20
Each
units
SAR 6 12-bit 2Msps Differential, Pseudo Differential, Single Ended Voltage Surface Mount LFCSP VQ 32 ±1.5LSB Serial (SPI/QSPI/Microwire) Single 2.7 → 5.25 V 5 x 5 x 0.95mm
RS Stock No. 523-8446
Mfr. Part No.AD7705BNZ
SGD16.37
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. 162-5217
Mfr. Part No.PCM1803ADB
SGD5.38
Each (In a Tube of 65)
units
Delta Sigma 2 24 bit 96ksps Single Ended Voltage Surface Mount SSOP 20 - Serial - 5 V 7.2 x 5.3 x 1.95mm
RS Stock No. 522-8916
Mfr. Part No.AD7575JNZ
SGD29.87
Each
units
SAR 1 8-bit - Single Ended Voltage Through Hole PDIP 18 ±1LSB Parallel - 5 V 23.12 x 6.61 x 3.56mm
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. 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. 412-668
Mfr. Part No.AD7705BRZ
SGD16.37
Each
units
Delta Sigma 2 16-bit 0.5ksps Differential Voltage Surface Mount SOIC W 16 ±0.003%FSR Serial (SPI) - 3 V, 5 V 10.5 x 7.6 x 2.35mm
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. 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. 774-7393
Mfr. Part No.TC7109CKW
BrandMicrochip
SGD20.62
Each
units
Dual Slope 1 12-bit - Differential Voltage Surface Mount PQFP 44 1Counts Parallel & Serial Dual - 10.1 x 10.1 x 2.1mm
RS Stock No. 169-8394
Mfr. Part No.CS5530-ISZ
SGD8.15
Each (In a Tube of 66)
units
Delta Sigma 1 24-bit 3840sps Differential Voltage Surface Mount SSOP 20 ±0.003%FSR Serial (SPI) Dual, Single 5 V 7.5 x 5.6 x 1.88mm
RS Stock No. 506-3832
Mfr. Part No.LTC2400CS8#PBF
SGD19.96
Each
units
Delta Sigma 1 24-bit 0.008ksps Single Ended Voltage Surface Mount SOIC 8 15ppm Vref Serial (SPI) - 3.3 V, 5 V 5 x 3.99 x 1.48mm
RS Stock No. 522-9559
Mfr. Part No.AD7582KNZ
SGD122.10
Each
units
SAR 4 12-bit 10ksps Single Ended Voltage Through Hole PDIP 28 - Parallel - - 36.83 x 13.97 x 4.07mm
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. 165-1893
Mfr. Part No.TC7109CKW
BrandMicrochip
SGD13.60
Each (In a Tray of 96)
units
Dual Slope 1 12-bit - Differential Voltage Surface Mount PQFP 44 1Counts Parallel & Serial Dual - 10.1 x 10.1 x 2.1mm
RS Stock No. 732-1537
Mfr. Part No.ADS1148IPW
SGD15.58
Each
units
Delta Sigma 8 16-bit 2ksps Differential, Single Ended Voltage Surface Mount TSSOP 28 ±1LSB Serial (SPI) Dual, Single 2.7 → 5.25 V 9.8 x 4.5 x 1.05mm
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. 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. 162-4132
Mfr. Part No.ADS7805UB
SGD101.69
Each (In a Tube of 20)
units
SAR 1 16-bit 100ksps Single Ended Voltage Surface Mount SOIC 28 ±3LSB Parallel - 5 V 18 x 7.52 x 2.35mm
RS Stock No. 796-9177
Mfr. Part No.AD9628BCPZ-105
SGD74.19
Each
units
Pipelined 2 12-bit 105Msps Differential Voltage Surface Mount LFCSP 64 ±0.75LSB Serial (SPI) Single 1.7 → 1.9 V 9 x 8.75 x 0.95mm
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