參數(shù)資料
型號: AD7769JP
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: LC2MOS Analog I/O Port
中文描述: 2-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PQCC28
封裝: PLASTIC, LCC-28
文件頁數(shù): 16/16頁
文件大?。?/td> 265K
代理商: AD7769JP
AD7769
–16–
REV. A
C
P
Figure 31. Multichannel Inputs
Multichannel E xpansion
In some applications, more than two analog input channels are
required to be converted by the ADC. Figure 31 shows a circuit
configuration for such an application. T he ADG528A is a
latched, B-channel analog multiplexer that is ideally suited for
this application since it is specified for single supply
operation
(+12 V
±
10%).
T he
CS
,
ADC
/DAC and
WR
inputs of the AD7769 are gated to
drive the
WR
input of the ADG528A. T he multiplexer input
signal is selected on the falling edge of the
WR
pulse while the
signal is latched on the rising edge. Also, on the rising edge of
WR
, the AD7769 ADC starts conversion. T herefore, the output
signal of the multiplexer must have settled to within 8-bits over
the duration of the
WR
pulse (see ADC Conversion Cycle sec-
tion for details). T he t
ON
(
WR
) and settling time of the
ADG528A thus determines the width of the
WR
pulse.
OUT LINE DIME NSIONS
Dimensions shown in inches and (mm).
28-Lead Plastic DIP
(N-28)
28-Lead Plastic Leaded Chip Carrier
(P-28A)
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