Analog to Digital Converters are devices that are used to convert analog values into discrete numbers as binary numbers which can be processed by a processor. Since almost all the natural physical parameters around us have analog values, ADCs are an integral part of many signal processing systems. Nowadays, advanced ADC Integrated Circuits are available, which makes the analog to digital conversion process quicker and more accurate.
The ADC records the value of the input analog signal with each clock pulse and allots it a proportional value. This value is then converted into binary numbers having a certain number of bits. These sets of binary numbers measured against time give us the desired digital output, which can be then passed to a microcontroller or a microprocessor.
Every Analog to Digital Converter has a certain maximum voltage which can convert into digital. This is the voltage that will receive the highest value in the corresponding digital scale. This voltage is called the reference voltage for the ADC and is represented by VRef. All the discrete steps lie between this 0 and VRef and each discrete step has the value VRef /2n where n is the number of bits that are being used to represent individual values. So, 2n is the total number of allowed discrete values that the output from the ADC can attain. The greater the value of n, the greater will be the resolution of the ADC, which equal to the value of the smallest discrete step.
So, the resolution of an ADC depends on the adc reference voltage and the total number of possible discrete steps in the output range. For example, if we are using a reference voltage of 10 V with an 8-bit ADC, we will have the output on a scale of 0 to 255 (28 = 256). Also, the reference voltage divided by the number of possible discrete steps gives us the resolution (value of each step), we get the resolution to be 39 mV. So, the value of any given discrete step will be a whole number multiple of 39 mV.
The precision with an ADC carries out analog to digital conversion depends mainly on two parameters- the resolution and the sampling rate. The greater the number of samples an ADC takes in a given time interval, the closer the digital output comes to the analog input.
Data Acquisition - Analog to Digital Converters (ADC)
Image |
Part Number |
Manufacturer |
Description |
Package |
Stock |
Quantity |
Sampling Rate (Per Second) | Number of Inputs | Input Type | Data Interface | Configuration | Ratio - S/H:ADC | Number of A/D Converters | Architecture | Reference Type | Voltage - Supply, Analog | Voltage - Supply, Digital | Features | Operating Temperature | Package / Case | Supplier Device Package | Mounting Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Maxim Integrated |
IC ADC 12BIT SRL 94.4KSPS 16QSOP
|
Package: 16-SSOP (0.154", 3.90mm Width) |
Stock3,632 |
|
94.4k | 6, 12 | Differential, Single Ended | I2C | S/H-ADC | 1:1 | 1 | SAR | External, Internal | 5V | 5V | - | -40°C ~ 85°C | 16-SSOP (0.154", 3.90mm Width) | 16-QSOP | - |
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Intersil |
IC ADC 12BIT 40KSPS 28DIP
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Package: 28-DIP (0.600", 15.24mm) |
Stock9,576 |
|
40k | 2 | Single Ended | Parallel | ADC | - | 1 | SAR | External, Internal | ±11.4 V ~ 16.5 V | 5V | Selectable Address | 0°C ~ 75°C | 28-DIP (0.600", 15.24mm) | 28-PDIP | - |
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Analog Devices Inc. |
IC ADC 16BIT SAMPLING 16-DIP
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Package: 16-DIP (0.300", 7.62mm) |
Stock7,744 |
|
100k | 1 | Single Ended | SPI | S/H-ADC | 1:1 | 1 | SAR | External | ±12V | 5V | - | 0°C ~ 70°C | 16-DIP (0.300", 7.62mm) | 16-PDIP | - |
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Maxim Integrated |
IC DAS 12-BIT MULTIRANGE 28-SSOP
|
Package: 28-SSOP (0.209", 5.30mm Width) |
Stock60,000 |
|
8k | 8 | Single Ended | I2C | MUX-S/H-ADC | 1:1 | 1 | SAR | External, Internal | 5V | 5V | Selectable Address | -40°C ~ 85°C | 28-SSOP (0.209", 5.30mm Width) | 28-SSOP | - |
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|
Maxim Integrated |
IC ADC 8BIT 3V 1UA PWRDWN 20SOIC
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Package: 20-SOIC (0.295", 7.50mm Width) |
Stock5,024 |
|
400k | 1 | Single Ended | Parallel | S/H-ADC | 1:1 | 1 | Flash | External | ±3 V ~ 3.6 V | ±3 V ~ 3.6 V | - | 0°C ~ 70°C | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC | - |
|
|
Analog Devices Inc. |
IC ADC 12BIT 370MSPS 56LFCSP
|
Package: 56-VFQFN Exposed Pad, CSP |
Stock4,992 |
|
370M | 1 | Differential | LVDS - Parallel | S/H-ADC | 1:1 | 1 | Pipelined | External, Internal | 1.75 V ~ 1.9 V | 1.75 V ~ 1.9 V | - | -40°C ~ 85°C | 56-VFQFN Exposed Pad, CSP | 56-LFCSP-VQ (8x8) | - |
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|
Intersil |
IC ADC 12BIT 40KSPS 28DIP
|
Package: 28-DIP (0.600", 15.24mm) |
Stock4,832 |
|
40k | 2 | Single Ended | Parallel | ADC | - | 1 | SAR | External, Internal | ±11.4 V ~ 16.5 V | 5V | Selectable Address | 0°C ~ 75°C | 28-DIP (0.600", 15.24mm) | 28-PDIP | - |
|
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Texas Instruments |
IC 8-BIT 80 MSPS LP A/D 28-TSSOP
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Package: 28-TSSOP (0.173", 4.40mm Width) |
Stock24,000 |
|
80M | 1 | Single Ended | Parallel | S/H-ADC | 1:1 | 1 | Pipelined | External, Internal | 3 V ~ 3.6 V | 3 V ~ 3.6 V | - | 0°C ~ 70°C | 28-TSSOP (0.173", 4.40mm Width) | 28-TSSOP | - |
|
|
Linear Technology |
IC ADC 20BIT 500KSPS 16DFN
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Package: 16-WFDFN Exposed Pad |
Stock6,592 |
|
500k | 1 | Differential | SPI | S/H-ADC | 1:1 | 1 | SAR | External | 2.375 V ~ 2.625 V | 2.375 V ~ 2.625 V | - | 0°C ~ 70°C | 16-WFDFN Exposed Pad | 16-DFN (4x3) | - |
|
|
Linear Technology |
IC ADC 16BIT 1.5MSPS SAR 52QFN
|
Package: 52-WFQFN Exposed Pad |
Stock7,952 |
|
1.5M | 8 | Differential | LVDS - Parallel, SPI | S/H-MUX-ADC | 2:1 | 4 | SAR | External, Internal | 3.13 V ~ 3.47 V, 5V | 3.13 V ~ 3.47 V, 5V | Simultaneous Sampling | -40°C ~ 125°C | 52-WFQFN Exposed Pad | 52-QFN (7x8) | - |
|
|
Linear Technology |
IC A/D CONV 14BIT 2.5MSPS 36SSOP
|
Package: 36-SSOP (0.209", 5.30mm Width) |
Stock5,424 |
|
2.5M | 1 | Differential, Single Ended | Parallel | S/H-ADC | 1:1 | 1 | SAR | External, Internal | 5V | 5V | - | 0°C ~ 70°C | 36-SSOP (0.209", 5.30mm Width) | 36-SSOP | - |
|
|
Texas Instruments |
IC ADC 16BIT 200KSPS 8VSSOP
|
Package: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
Stock2,992 |
|
200k | 1 | Single Ended | SPI | S/H-ADC | 1:1 | 1 | SAR | External | 5V | 5V | - | -40°C ~ 85°C | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-VSSOP | - |
|
|
Texas Instruments |
IC ADC CONV 4-CH SERIAL 16SSOP
|
Package: 16-SSOP (0.154", 3.90mm Width) |
Stock4,464 |
|
100k | 2, 4 | Differential, Single Ended | SPI | S/H-ADC | 1:1 | 1 | SAR | External | 2.7 V ~ 3.6 V, 5V | 2.7 V ~ 3.6 V, 5V | - | -40°C ~ 85°C | 16-SSOP (0.154", 3.90mm Width) | 16-SSOP | - |
|
|
Linear Technology |
IC ADC 12BIT 50MSPS SMPL 48TSSOP
|
Package: 48-TFSOP (0.240", 6.10mm Width) |
Stock3,040 |
|
50M | 1 | Differential | Parallel | S/H-ADC | 1:1 | 1 | Pipelined | External, Internal | 5V | 5V | - | -40°C ~ 85°C | 48-TFSOP (0.240", 6.10mm Width) | 48-TSSOP | - |
|
|
Linear Technology |
IC ADC 14BIT 2MSPS 16MSOP
|
Package: 16-TFSOP (0.118", 3.00mm Width) Exposed Pad |
Stock3,952 |
|
2M | 1 | Differential | LVDS - Serial, Serial | S/H-ADC | 1:1 | 1 | SAR | External, Internal | 3.13 V ~ 3.47 V, 5V | 3.13 V ~ 3.47 V, 5V | - | -40°C ~ 85°C | 16-TFSOP (0.118", 3.00mm Width) Exposed Pad | 16-MSOP | - |
|
|
Microchip Technology |
IC ADC 12BIT HANDSHAKE 44PLCC
|
Package: 44-LCC (J-Lead) |
Stock18,468 |
|
30 | 1 | Differential | Parallel | ADC | - | 1 | Dual Slope | External | 5V | 5V | - | 0°C ~ 70°C | 44-LCC (J-Lead) | 44-PLCC (16.59x16.59) | - |
|
|
Linear Technology |
IC A/D CONV 2CH 16BIT 10-MSOP
|
Package: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
Stock9,576 |
|
150k | 2 | Single Ended | SPI | MUX-S/H-ADC | 1:1 | 1 | SAR | External | 2.7 V ~ 3.6 V | 2.7 V ~ 3.6 V | - | 0°C ~ 70°C | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 10-MSOP | - |
|
|
Maxim Integrated |
IC ADC 10BIT 300KSPS 24-QSOP
|
Package: 24-SSOP (0.154", 3.90mm Width) |
Stock3,536 |
|
300k | 8, 16 | Differential, Single Ended | SPI | S/H-ADC | 1:1 | 1 | SAR | External, Internal | 2.7 V ~ 3.6 V | 2.7 V ~ 3.6 V | Temperature Sensor | -40°C ~ 85°C | 24-SSOP (0.154", 3.90mm Width) | 24-QSOP | - |
|
|
|
Maxim Integrated |
IC ADC 10BIT 400KSPS 24-QSOP
|
Package: 24-SSOP (0.154", 3.90mm Width) |
Stock5,616 |
|
400k | 2, 4 | Pseudo-Differential, Single Ended | Parallel | MUX-S/H-ADC | 1:1 | 1 | SAR | External, Internal | 5V | 2.7 V ~ 5.5 V | - | -40°C ~ 85°C | 24-SSOP (0.154", 3.90mm Width) | 24-QSOP | - |
|
|
Linear Technology |
IC ADC SAR 16BIT 15MSPS 32QFN
|
Package: 32-WFQFN Exposed Pad |
Stock6,612 |
|
15M | 1 | Differential | LVDS - Serial | S/H-ADC | 1:1 | 1 | SAR | Internal | 5V | 2.375 V ~ 2.625 V | - | -40°C ~ 85°C | 32-WFQFN Exposed Pad | 32-QFN (5x5) | - |
|
|
Maxim Integrated |
IC ADC 12BIT 3US H-SPEED 24-SOIC
|
Package: 24-SOIC (0.295", 7.50mm Width) |
Stock13,512 |
|
308k | 1 | Single Ended | Parallel | S/H-ADC | 1:1 | 1 | SAR | Internal | 5V, -12V, -15V | 5V, -12V, -15V | - | 0°C ~ 70°C | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC | - |
|
|
|
Linear Technology |
IC ADC 18BIT SRL/SPI 1M 32QFN
|
Package: 32-WFQFN Exposed Pad |
Stock3,952 |
|
1M | 8 | Differential, Pseudo-Differential | SPI | MUX-S/H-ADC | 1:1 | 1 | SAR | External, Internal | 5V | 5V | - | -40°C ~ 125°C | 32-WFQFN Exposed Pad | 32-QFN (5x5) | - |
|
|
Maxim Integrated |
IC ADC 14BIT 85KSPS 16-SOIC
|
Package: 16-SOIC (0.295", 7.50mm Width) |
Stock6,420 |
|
85k | 1 | Single Ended | SPI | S/H-ADC | 1:1 | 1 | SAR | External | ±5V | ±5V | - | -40°C ~ 85°C | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC | - |
|
|
|
Linear Technology |
IC ADC 16BIT SAR 5MSPS 16MSOP
|
Package: 16-TFSOP (0.118", 3.00mm Width) Exposed Pad |
Stock6,324 |
|
5M | 1 | Differential | LVDS - Serial, SPI | S/H-ADC | 1:1 | 1 | SAR | External, Internal | 3.13 V ~ 3.47 V, 5V | 3.13 V ~ 3.47 V, 5V | - | 0°C ~ 70°C | 16-TFSOP (0.118", 3.00mm Width) Exposed Pad | 16-MSOP-EP | - |
|
|
|
Texas Instruments |
IC ADC 31BIT HI-RES SER 28TSSOP
|
Package: 28-TSSOP (0.173", 4.40mm Width) |
Stock6,048 |
|
4k | 1 | Differential | SPI | ADC | - | 1 | Sigma-Delta | External | 5V | 1.65 V ~ 3.6 V | PGA | -40°C ~ 85°C | 28-TSSOP (0.173", 4.40mm Width) | 28-TSSOP | - |
|
|
Linear Technology |
IC ADC 14BIT 250MSPS 48QFN
|
Package: 48-WFQFN Exposed Pad |
Stock5,488 |
|
250M | 2 | Differential | JESD204B | S/H-ADC | 1:1 | 2 | Pipelined | External, Internal | 1.7 V ~ 1.9 V | 1.7 V ~ 1.9 V | Simultaneous Sampling | 0°C ~ 70°C | 48-WFQFN Exposed Pad | 48-QFN (7x7) | - |
|
|
Linear Technology |
IC ADC 14BIT SPI/SRL 25M 140-BGA
|
Package: 140-BFBGA |
Stock9,360 |
|
25M | 8 | Differential | LVDS - Serial | S/H-ADC | 1:1 | 8 | Pipelined | External, Internal | 1.7 V ~ 1.9 V | 1.7 V ~ 1.9 V | Simultaneous Sampling | 0°C ~ 70°C | 140-BFBGA | 140-BGA (11.25x9) | - |
|
|
Linear Technology |
IC ADC
|
Package: 40-WFQFN Exposed Pad |
Stock7,232 |
|
150M | 1 | Differential | Parallel | S/H-ADC | 1:1 | 1 | Pipelined | External, Internal | 1.7 V ~ 1.9 V | 1.7 V ~ 1.9 V | - | 0°C ~ 70°C | 40-WFQFN Exposed Pad | 40-QFN (6x6) | - |
|
|
Texas Instruments |
16B 8CH 500KSPS SAR ADC
|
Package: 64-LQFP |
Stock2,192 |
|
500k | 8 | Single Ended | Parallel, Serial | PGA-ADC | 0:1 | 8 | SAR | External, Internal | 4.75 V ~ 5.25 V | 2.3 V ~ 5.25 V | Simultaneous Sampling | -40°C ~ 125°C (TA) | 64-LQFP | 64-LQFP (10x10) | - |
|
|
Texas Instruments |
16-BIT AFE FOR SMALL SIGNAL SENS
|
Package: 16-TSSOP (0.173", 4.40mm Width) |
Stock4,624 |
|
2k | 4 | Differential, Single Ended | I²C | MUX-PGA-ADC | 0:1 | 1 | Sigma-Delta | External | ±2.5V, 2.3 V ~ 5.5 V | 2.3 V ~ 5.5 V | PGA, Temperature Sensor | -40°C ~ 125°C | 16-TSSOP (0.173", 4.40mm Width) | 16-TSSOP | - |
