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PDF UTC7106 Data sheet ( Hoja de datos )
| Número de pieza | UTC7106 | |
| Descripción | A/D Converter | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UTC 7106
fCLOCK=fOSC/4
*INTEGRATION PERIOD
tINT=1000×(4/fOSC)
*60/50Hz REJECTION CRITERION
tINT/t60Hz or tINT/t50Hz=Integer
*OPTIMUM INTEGRATION CURRENT
IINT=4μA
*FULL SCALE ANALOG INPUT VOLTAGE
VINFS (Typ)=200mV or 2V
*INTEGRATE ESISTOR
RINT= VINFS/ IINT
*INTEGRATE CAPACITOR
CINT=(tINT)(IINT)/ VINT
*INTEGRATOR OUTPUT VOLTAGE SWING
VINT=(tINT)(IINT)/ CINT
*VINT MAXIMUM SWING
(V- + 0.5V)<VINT<(V+ - 0.5V), VINT (Typ)=2V
*DISPLAY COUNT
COUNT=1000×VIN/VREF
*CONVERSION CYCLE
tCYC=tCLOCK×4000
tCYC=tOSC×16,000
When fOSC=48kHz, tCYC=333ms
*COMMON MODE INPUT VOLTAGE
(V- + 1V)<VIN<(V+ - 0.5V)
*AUTO-ZERO CAPACITOR
0.01μF<CAZ<1μF
*REFERENCE CAPACITOR
0.1μF<CREF<1μF
*VCOM
Biased between Vi and V-
*VCOM≒V+ - 2.8V
Regulation lost when V+ to V- <≒6.8V
If VCOM is externally pulled down to (V+ to V-)/2, the VCOM circuit will turn off.
CMOS IC
*POWER SUPPLY: SINGLE 9V
V+ - V- =9V
UTC UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R502-018,B
5 Page 
UTC 7106
CMOS IC
transducer is 0.662V. Instead of dividing the input down to 200mV, the designer should use the input voltage directly
and select VREF=0.341V. Suitable values for integrating resistor and capacitor would be 120kΩ and 0.22μF. This
makes the system slightly quieter and also avoids a divider network on the input.
TYPICAL APPICATIONS
The UTC 7106 may be used in a wide variety of configurations. The circuits which follow show some of the
possibilities, and serve to illustrate the exceptional versatility of these A/D converters.
OSC 1
OSC 2
OSC 3
TEST
REF HI
REF LO
CREF
CREF
COMMON
IN HI
IN LO
A-Z
BUFF
INT
V-
G2
C3
A3
G3
BP
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
TO PIN 1
91kΩ
100pF
SET VREF
=100mV
1kΩ 22kΩ
0.1μF
0. 47μF
47kΩ
1MΩ
0. 01μF
0. 22μF
+
IN
-
+
9V
-
TO DISPLAY
TO BACKPLANE
Values shown are for 200mV full scale,3 readings/sec.,floating
supply voltage(9V battery).
FIGURE 7. USING THE INTERNAL REFERENCE
UTC
UNISONIC TECHNOLOGIES CO., LTD. 11
QW-R502-018,B
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet UTC7106.PDF ] | |
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