參數(shù)資料
型號: L64781
廠商: LSI CORP
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝: PLASTIC, QFP-100
文件頁數(shù): 128/164頁
文件大?。?/td> 2003K
代理商: L64781
4-4
Signals
4.4 ADC Interface
The following signals are related to the ADC interface.
CMCAP
Common Mode Capacitor
I
Pin connected to a tap point on a internal resistor divider
used to create the CMO and CMI signals.
CMI
Common Mode In
O
Voltage for the analog circuitry of the ADC.
CMO
Common Mode Out
O
Voltage for the analog circuitry of the ADC.
RBIAS
Resistor Bias
I
An external resistor should be connected between this
pin and ground to provide accurate bias current for the
analog circuitry on the ADC.
VD1
Power
I
Power supply input for the analog clock driver.
VD2
Power
I
Power supply input for the analog circuitry.
VD3
Power
I
Power supply input that connects to a n-well guard ring
that surrounds the ADC.
VIM
Differential Negative Input
I
Analog negative input to the A/D converter.
VIP
Differential Positive Input
I
Analog positive input to the A/D converter.
VREF
Voltage Reference
O
Output of an on-chip bandgap voltage reference.
VREFM
Negative Voltage Reference
O
Negative voltage reference for the ADC.
VREFP
Voltage Reference Positive
O
Positive voltage reference for the ADC.
VS1
Ground
I
Ground return for the analog clock driver.
l64781.book Page 4 Friday, January 19, 2001 1:28 PM
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