參數(shù)資料
型號(hào): ADC10461
廠商: National Semiconductor Corporation
英文描述: 10-Bit 600 ns A/D Converter with Input Multiplexer and Sample/Hold
中文描述: 10位600納秒的A / D輸入多路復(fù)用器和轉(zhuǎn)換器采樣/保持
文件頁(yè)數(shù): 9/15頁(yè)
文件大?。?/td> 342K
代理商: ADC10461
Timing Diagrams
(Continued)
Simplified Block Diagram
01110809
*ADC10461 Only
*
*
ADC10462 and ADC10464 Only
*
**
ADC10464 Only
Functional Description
The ADC10461, ADC10462 and ADC10464 digitize an ana-
log input signal to 10 bits accuracy by performing two
lower-resolution “flash” conversions. The first flash conver-
sion provides the six most significant bits (MSBs) of data,
and the second flash conversion provides the four least
significant bits LSBs).
Figure 3 is a simplified block diagram of the converter. Near
the center of the diagram is a string of resistors. At the
bottom of the string of resistors are 16 resistors, each of
which has a value 1/1024 the resistance of the whole resistor
string. These lower 16 resistors (the
LSB Ladder
) therefore
have a voltage drop of 16/1024, or 1/64 of the total reference
voltage (V
V
) across them. The remainder of the
resistor string is made up of eight groups of eight resistors
connected in series. These comprise the
MSB Ladder
.
01110808
FIGURE 2. Mode 2 (RD Mode). The conversion time (t
CRD
) includes the
sampling time and is determined by the internal timer.
A
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