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TC9400E/PD

更新时间： 2024-01-04 12:04:51
品牌 Logo 应用领域
美国微芯 - MICROCHIP 转换器
页数 文件大小 规格书
20页 504K
描述
IC,VOLTAGE-TO-FREQUENCY CONVERTER,CMOS,DIP,14PIN

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TC9400E/PD 技术参数

生命周期：Obsolete零件包装代码：DIP
包装说明：SDIP, SDIP24,.3针数：24
Reach Compliance Code：unknown风险等级：5.73
转换器类型：D/A CONVERTER输入位码：BINARY
输入格式：SERIALJESD-30 代码：R-PDIP-T24
长度：22 mm位数：1
功能数量：1端子数量：24
最高工作温度：85 °C最低工作温度：-35 °C
封装主体材料：PLASTIC/EPOXY封装代码：SDIP
封装等效代码：SDIP24,.3封装形状：RECTANGULAR
封装形式：IN-LINE, SHRINK PITCH电源：5 V
认证状态：Not Qualified座面最大高度：4.5 mm
子类别：Other Converters最大压摆率：40 mA
标称供电电压：5 V表面贴装：NO
技术：CMOS温度等级：OTHER
端子形式：THROUGH-HOLE端子节距：1.778 mm
端子位置：DUAL宽度：7.62 mm
Base Number Matches：1

TC9400E/PD 数据手册

 浏览型号TC9400E/PD的Datasheet PDF文件第7页浏览型号TC9400E/PD的Datasheet PDF文件第8页浏览型号TC9400E/PD的Datasheet PDF文件第9页浏览型号TC9400E/PD的Datasheet PDF文件第11页浏览型号TC9400E/PD的Datasheet PDF文件第12页浏览型号TC9400E/PD的Datasheet PDF文件第13页 
TC9400/9401/9402  
FIGURE 5-1:  
RECOMMENDED  
VS. V  
5.0  
VOLTAGE-TO-FREQUENCY  
(V/F) CONVERTER DESIGN  
INFORMATION  
C
REF  
REF  
500  
400  
300  
V
V
= +5V  
= -5V  
= 1MΩ  
= +10V  
DD  
SS  
R
IN  
IN  
A
5.1  
Input/Output Relationships  
V
T
= +25°C  
The output frequency (F  
input voltage (V ) by the transfer equation:  
) is related to the analog  
OUT  
10kHz  
IN  
EQUATION 5-1:  
200  
100  
V
R
1
)(V  
IN  
, x  
Frequency Out =  
(V  
)
REF  
REF  
IN  
100kHz  
-2 -3 -4  
0
-5 -6  
-7  
-1  
5.2  
External Component Selection  
V
(V)  
REF  
5.2.1  
R
IN  
5.2.4  
V
, V  
DD  
SS  
The value of this component is chosen to give a full  
Power supplies of ±5V are recommended. For high  
accuracy requirements, 0.05% line and load regulation  
and 0.1µF disc decoupling capacitors, located near the  
pins, are recommended.  
scale input current of approximately 10µA:  
EQUATION 5-2:  
FULLSCALE  
V
IN  
R
≅
IN  
10µA  
5.3  
Adjustment Procedure  
Figure 3-1 shows a circuit for trimming the zero loca-  
tion. Full scale may be trimmed by adjusting R , V  
EQUATION 5-3:  
,
IN REF  
or C . Recommended procedure for a 10kHz full  
scale frequency is as follows:  
REF  
10V  
R
≅
= 1MΩ  
IN  
10µA  
1. Set V to 10mV and trim the zero adjust circuit  
IN  
to obtain a 10Hz output frequency.  
Note that the value is an approximation and the exact  
relationship is defined by the transfer equation. In prac-  
2. Set V to 10V and trim either R , V  
, or C  
REF  
IN  
IN REF  
tice, the value of R typically would be trimmed to  
to obtain a 10kHz output frequency.  
IN  
obtain full scale frequency at V  
full scale (see  
IN  
If adjustments are performed in this order, there should  
be no interaction and they should not have to be  
repeated.  
Section 5.3, Adjustment Procedure). Metal film resis-  
tors with 1% tolerance or better are recommended for  
high accuracy applications because of their thermal  
stability and low noise generation.  
5.4  
Improved Single Supply V/F  
Converter Operation  
5.2.2  
C
INT  
A TC9400, which operates from a single 12 to 15V vari-  
able power source, is shown in Figure 5-2. This circuit  
uses two Zener diodes to set stable biasing levels for  
the TC9400. The Zener diodes also provide the refer-  
ence voltage, so the output impedance and tempera-  
ture coefficient of the Zeners will directly affect power  
supply rejection and temperature performance. Full  
scale adjustment is accomplished by trimming the input  
current. Trimming the reference voltage is not recom-  
mended for high accuracy applications unless an  
Op Amp is used as a buffer, because the TC9400  
requires a low impedance reference (see Section 4.9,  
The exact value is not critical but is related to C  
the relationship:  
by  
REF  
3C  
≤ C  
≤ 10C  
INT REF  
REF  
Improved stability and linearity are obtained when  
≤ 4C . Low leakage types are recommended,  
C
INT  
REF  
although mica and ceramic devices can be used in  
applications where their temperature limits are not  
exceeded. Locate as close as possible to Pins 12  
and 13.  
5.2.3  
C
REF  
V
pin description, for more information).  
REF  
The exact value is not critical and may be used to trim  
the full scale frequency (see Section 7.1, Input/Output  
Relationships). Glass film or air trimmer capacitors are  
recommended because of their stability and low leak-  
age. Locate as close as possible to Pins 5 and 3 (see  
Figure 5-1).  
The circuit of Figure 5-2 will directly interface with  
CMOS logic operating at 12V to 15V. TTL or 5V CMOS  
logic can be accommodated by connecting the output  
pull-up resistors to the +5V supply. An optoisolator can  
also be used if an isolated output is required; also, see  
Figure 5-3.  
DS21483B-page 10  
2002 Microchip Technology Inc.  
1...78910111213...20

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