2-100 Revision 4 ADC Description The Fusion ADC is a 12-bit SAR ADC. It offers a wide variety of features for different" />
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鍨嬭櫉(h脿o)锛� M1AFS1500-1FGG484
寤犲晢锛� Microsemi SoC
鏂囦欢闋�(y猫)鏁�(sh霉)锛� 20/334闋�(y猫)
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妯�(bi膩o)婧�(zh菙n)鍖呰锛� 60
绯诲垪锛� Fusion®
RAM 浣嶇附瑷�(j矛)锛� 276480
杓稿叆/杓稿嚭鏁�(sh霉)锛� 223
闁€(m茅n)鏁�(sh霉)锛� 1500000
闆绘簮闆诲锛� 1.425 V ~ 1.575 V
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
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灏佽/澶栨锛� 484-BGA
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Device Architecture
2-100
Revision 4
ADC Description
The Fusion ADC is a 12-bit SAR ADC. It offers a wide variety of features for different use models.
Figure 2-80 shows a block diagram of the Fusion ADC.
Configurable resolution: 8-bit, 10-bit, and 12-bit mode
DNL: 0.6 LSB for 10-bit mode
INL: 0.4 LSB for 10-bit mode
No missing code
Internal VAREF = 2.56 V
Maximum Sample Rate = 600 Ksps
Power-up calibration and dynamic calibration after every sample to compensate for temperature
drift over time
ADC Theory of Operation
An analog-to-digital converter is used to capture discrete samples of a continuous analog voltage and
provide a discrete binary representation of the signal. Analog-to-digital converters are generally
characterized in three ways:
Input voltage range
Resolution
Bandwidth or conversion rate
The input voltage range of an ADC is determined by its reference voltage (VREF). Fusion devices
include an internal 2.56 V reference, or the user can supply an external reference of up to 3.3 V. The
following examples use the internal 2.56 V reference, so the full-scale input range of the ADC is 0 to
2.56 V.
The resolution (LSB) of the ADC is a function of the number of binary bits in the converter. The ADC
approximates the value of the input voltage using 2n steps, where n is the number of bits in the converter.
Each step therefore represents VREF梅 2n volts. In the case of the Fusion ADC configured for 12-bit
operation, the LSB is 2.56 V / 4096 = 0.625 mV.
Finally, bandwidth is an indication of the maximum number of conversions the ADC can perform each
second. The bandwidth of an ADC is constrained by its architecture and several key performance
characteristics.
Figure 2-80 ADC Simplified Block Diagram
TVC
SYSCLK
ADCCLK
Signals from
Analog Quads
CHNUMBER
SAR ADC
STC
MODE
RESULT
DATAVALID
BUSY
STATUS
SAMPLE
CALIBRATE
VAREF
Analog
MUX
32
12
鐩搁棞(gu膩n)PDF璩囨枡
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