參數(shù)資料
型號: ZN448
廠商: Electronic Theatre Controls, Inc.
英文描述: TV 100C 100#22D SKT RECP
中文描述: 8位微處理器兼容AD轉換器
文件頁數(shù): 12/18頁
文件大?。?/td> 289K
代理商: ZN448
ZN448/9
12
ANALOG INPUT RANGES
The basic connection of the ZN448/9 shown in Fig.15 has an
analogue input range 0 to V
which, in some applications,
may be made available from previous signal conditioning/
scaling circuits. Input voltage ranges greater than this are
accommodated by providing an attenuator on the comparator
input, whilst for smaller input ranges the signal must be
amplified to a suitable level.
Bipolar input ranges are accommodated by off-setting the
analogue input input range so that the comparator always
sees a positive input voltage.
Fig.15 External components for basic operation
LSB
DB0
MSB
DB7
VCC
(+5V)
BUSY
1
18
1
RD
2
17
2
CK
3
16
3
WR
4
15
4
V-
(-5V)
5
14
5
AIN
6
13
6
VREFIN
7
12
VREFOUT
8
11
GND
(0V)
9
10
RREF
(390
)
REXT
(82k)
RIN
(4k)
VIN
CREF
(4μ7)
DIGITAL OUTPUTS
NOMINAL AIN RANGE = 0 TO VREFIN
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