
Allicdata Part #: | AD7870BQ-ND |
Manufacturer Part#: |
AD7870BQ |
Price: | $ 0.00 |
Product Category: | Integrated Circuits (ICs) |
Manufacturer: | Analog Devices Inc. |
Short Description: | IC ADC 12BIT SAMPLING 3V 24-CDIP |
More Detail: | 12 Bit Analog to Digital Converter 1 Input 1 SAR 2... |
DataSheet: | ![]() |
Quantity: | 1000 |
1 +: | 0.00000 |
Number of A/D Converters: | 1 |
Base Part Number: | AD7870 |
Supplier Device Package: | 24-CDIP |
Package / Case: | 24-CDIP (0.300", 7.62mm) |
Operating Temperature: | -40°C ~ 85°C |
Features: | -- |
Voltage - Supply, Digital: | ±5V |
Voltage - Supply, Analog: | ±5V |
Reference Type: | Internal |
Architecture: | SAR |
Series: | -- |
Ratio - S/H:ADC: | 1:1 |
Configuration: | S/H-ADC |
Data Interface: | SPI, Parallel |
Input Type: | Single Ended |
Number of Inputs: | 1 |
Sampling Rate (Per Second): | 100k |
Number of Bits: | 12 |
Part Status: | Active |
Packaging: | Tube |
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The AD7870BQ is a high-performance, low-power, charge-compensated, 8-bit successive approximation A/D converter designed for use in data acquisition systems. It offers an on-chip, eight-channel multiplexer, allowing for separate conversion of eight analog inputs. It also provides reference input and clock input for synchronous operation. The output format is straight binary coded. With a selectable sampling rate of up to 1 Msps, the AD7870BQ is ideal for multiplexed data acquisition applications.
The AD7870BQ has two key features that enable it to stand out from other data acquisition components. First, its charge-compensated architecture ensures excellent linearity over a wide dynamic range, eliminating the need to measure, store and look-up the charge offsets of each input signal. Second, the AD7870BQ uses a high-performance, low-power, switched-capacitor input stage, resulting in a very low power architecture.
Application Field
The AD7870BQ is ideal for data acquisition applications such as measurement of strain and pressure, temperature sensing, seismology, medical instrumentation, and industrial process control. In addition, its fast sampling rate, low power consumption, and high channel densities make it ideally suited for wireless and portable device applications.
Working Principle
The AD7870BQ A/D converter is designed around a switched capacitor array, which allows for the conversion of up to eight analog signals. The array consists of a series of capacitive elements, each of which is connected to a different input line. The switched capacitor array is connected to a serial ADC, which receives the digital samples and performs the successive approximation algorithm. Each sampling period, the array charges to the desired level, and then the ADC is used to measure the charge and output a digital value according to the charge level.
The AD7870BQ also uses a proprietary Auto-Range feature, which adjusts the reference voltage to allow the converter to accurately convert the input signals at different ranges. The Auto-Range feature enables the converter to get the best performance for each input voltage range, resulting in higher accuracy and improved linearity.
The AD7870BQ also provides a range of selectable sampling rates from 10 Hz to 1 Msps. The sampling rate can be set to match the application requirements, ensuring that the data is acquired at the most suitable rate depending on the application.
The AD7870BQ also has an on-chip interpolator, which improves the resolution of the converter. The interpolator is used to sample multiple points within the sampling interval, reducing the resolution errors and increasing the converter’s accuracy.
The AD7870BQ offers a wide variety of features that make it suitable for a variety of data acquisition applications. Its low power consumption, high resolution, and wide range of input signals make it a great choice for any project that requires fast and accurate data acquisition.
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