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參數(shù)資料
| 型號： | ZN427J-8 |
| 元件分類： | 參考電壓二極管 |
| 英文描述： | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
| 中文描述： | 250 的低電流運算，低反向泄露，低噪聲穩(wěn)壓二極管 |
| 文件頁數(shù)： | 11/17頁 |
| 文件大?。?/td> | 311K |
| 代理商： | ZN427J-8 |
ZN427
10
The comparator derives the tail current, I
, for its first stage
from an external resistor, R
EXT
, which is taken to a negative
supply V–.
This arrangement allows the ZN427 to work with any negative
supply in the range -3 to -30 volts. the ZN427 is designed to
be insensitive to changes in I
EXT
from 25
μ
A to 150
μ
A. The
suggested nominal value of I
is 65
μ
A and a suitable value
for R
EXT
is given by R
EXT
= |V_|15k
.
V
–
(volts)
-3
-5
-10
-12
-15
-20
-25
-30
R
EXT
(
±
10%)
47k
82k
150k
180k
220k
330k
390k
470k
The output from the D-A converter is connected through the
4k
ladder resistance to one side of the comparator. The
analog input to be converted could be connected directly to the
other comparator input (V
, pin 6) but for optimum stability
with temperature the analog input should be applied through
a source resistance (R
IN
= 4k
) to match the ladder
resistance).
ANALOG INPUT RANGES
The basic connection of the ZN427 shown in Fig.13 has an
analog input range 0 to V
IN 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
analog input input range so that the comparator always sees
a positive input voltage.
Fig.13 External components for basic operation
LSB
BIT 8
MSB
BIT 1
VCC
(+5V)
BUSY
1
18
7
RD
2
17
6
CK
3
16
5
WR
4
15
4
V-
(-5V)
5
14
3
AIN
6
13
2
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
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ZN427J8DC | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
| ZN427J8 | Circular Connector; MIL SPEC:MIL-DTL-38999 Series III; Body Material:Metal; Series:TVPS00; No. of Contacts:4; Connector Shell Size:21; Connecting Termination:Crimp; Circular Shell Style:Wall Mount Receptacle; Body Style:Straight |
| ZN428 | 8-BIT LATCHED INPUT D-A CONVERTER |
| ZN428J8DC | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
| ZN428DMP | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZN427J8DC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog-to-Digital Converter， 8-Bit |
| ZN428 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT LATCHED INPUT D-A CONVERTER |
| ZN428D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT LATCHED INPUT D-A CONVERTER |
| ZN428DMP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Digital-to-Analog Converter |
| ZN428E8 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT LATCHED INPUT D-A CONVERTER |
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