- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄362777 > ES5116 (Electronic Theatre Controls, Inc.) 3 1/2 DVM with hold and low battery indication PDF資料下載
參數(shù)資料
| 型號： | ES5116 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 3 1/2 DVM with hold and low battery indication |
| 中文描述： | 3 1 / 2數(shù)字電壓表的持有和低電量指示 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 269K |
| 代理商： | ES5116 |
CYRUSTEK CO.
ES5116
3 1/2 DVM with
hold and low battery indication
The differential reference should be used during the measurement of resistor by the ratio-metric method and when a
digital reading of zero is desired for Vin
and the voltage of being measured is connected between COMMON and INHI.
0, a compensating offset voltage can be applied between COMMON and INLO,
3
System Timing
The oscillator frequency is divided by four prior to clocking the internal decade counters. The signal integration takes a
fixed 1000 counts time period which is equal to 4000 clock pulses. The back plane drive signal is derived by dividing
oscillator frequency by 800. To make a maximum noise rejection of line frequency(60Hz or 50Hz,) the signal integration
period should be a multiple of the line frequency period. For 60Hz-noise rejection, oscillator frequencies of 120KHz,
80KHz, 60KHz, 48KHz, 40KHz, etc. should be selected. For 50Hz rejection, oscillator frequencies of 100KHz, 50KHz,
40KHz, etc. would be suitable.
For all ranges of frequency Rosc should be 100K
48KHz clock (3reading/second), Cosc=100pF.
, Cosc is selected from the approximate equation f
=
0.45/RC. For
4
Integrating Resistor
The input buffer amplifier and integrator are designed with class A output stages.The output stage idling current is 100
uA. Both of them can supply 20uA drive currents with negligible linearity errors. The integrating resistor is chosen to
remain linear drive region in the output stage. It should not be so large that the leakage current of printed circuit board
will induce errors. The recommended integrating resistor value for the 200 mV and 2 V full-scale are 47K
respectively.
and 470 K
5
Integrating Capacitor
The integrating capacitor should be selected to maximize integrator output voltage swing without causing output satura-
tion. For 3 readings/second (48KHz clock,) a 0.22uF value of
used,
The integrating capacitor must have low dielectric absorption to minimize roll-over error. An inexpensive polypropy-
lene capacitor is re commented.
is suggested. If a different oscillator frequency is
2V integrator swing.
must be changed in inverse proportion to maintain the nominal
6
Auto-Zero Capacitor
The auto-zero capacitor size has some influence on system noise. A 0.47uF capacitor is recommended for 200mV full
scale. A 0.047uF capacitor is adequate for 2V full scale applications. A mylar type dielectric capacitor is adequate.
7
Reference Voltage Capacitor
The reference voltage used to ramp the integrator output voltage back to zero during the reference integrate cycle is stored
on
capacitor is adequate.
. A 0.1uF value capacitor is acceptable when INLO is connected with COMMON. A mylar type dielectric
8
TEST
The TEST pin is tied to the internally generated digital ground through a 500
The TEST pin load should be no more than 1 mA.
If TEST is pulled high to V+, all segments plus the minus sign will be actived. It may destroy the LCD display as
keeping in this mode for several minutes .
resistor. Its potential is 5V less than V+.
9
Segment Drivers
For 3 readings/second (48KHz clock) the BP frequency is a 60Hz square wave with a nominal amplitude of 5V. The
segments are driven in the same frequency/amplitude. They are in phase with BP when the segment should be OFF, but
out of phase when ON. The polarity indication is "ON" for negative voltage inputs.
7
July 21, 2003
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ES51986 | 6000 COUNT AUTO DMM |
| ES6128F | Vibratto-S DVD Processor Product Brief |
| ES6128F | Vibratto-S DVD Processor Product Brief |
| ES6168A | Vibratto-S DVD Processor Product Brief |
| ES6168FA | Vibratto-S DVD Processor Product Brief |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ES5117 | 制造商:CYRUSTEK 制造商全稱:CYRUSTEK 功能描述:3 1/2 DVM with LED Display and Hold |
| ES5117Q | 制造商:CYRUSTEK 制造商全稱:CYRUSTEK 功能描述:3 1/2 DVM with LED Display and Hold |
| ES5120 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:3 3/4 DIGIT A/D CONVERTER |
| ES5120A-12.800M | 制造商:ECLIPTEK 制造商全稱:Ecliptek Corporation 功能描述:4.5mmHEIGHT THRU-HOLE SINEWAVE TCXO |
| ES5120A-12800M | 制造商:ECLIPTEK 制造商全稱:Ecliptek Corporation 功能描述:4.5mmHEIGHT THRU-HOLE SINEWAVE TCXO |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。