HI7106 데이터 시트보기 (PDF) - Intersil
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HI7106 Datasheet PDF : 11 Pages
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HI7106
Typical Application and Test Circuit
+-
9V
IN
R1
R5
R3
R4
C1
C4
C5 C2 R2
C3
DISPLAY
HI7106
DISPLAY
C1 = 0.1µF
C2 = 0.47µF
C3 = 0.22µF
C4 = 100pF
C5 = 0.02µF
R1 = 24kΩ
R2 = 47kΩ
R3 = 100kΩ
R4 = 1kΩ
R5 = 1MΩ
FIGURE 1. HI7106 TEST CIRCUIT AND TYPICAL APPLICATION WITH LCD DISPLAY COMPONENTS
SELECTED FOR 200mV FULL SCALE
Design Information Summary Sheet
• OSCILLATOR FREQUENCY
fOSC = 0.45/RC
COSC > 50pF; ROSC > 50kΩ
fOSC (Typ) = 48kHz
• OSCILLATOR PERIOD
tOSC = RC/0.45
• INTEGRATION CLOCK FREQUENCY
fCLOCK = fOSC/4
• INTEGRATION PERIOD
tINT = 1000 x (4/fOSC)
• 60/50Hz REJECTION CRITERION
tINT/t60Hz or tlNT/t60Hz = Integer
• OPTIMUM INTEGRATION CURRENT
IINT = 4µA
• FULL SCALE ANALOG INPUT VOLTAGE
VlNFS (Typ) = 200mV or 2V
• INTEGRATE RESISTOR
RINT = V----I-I-I-NN----F-T--S--
• INTEGRATE CAPACITOR
CINT
=
(---t--I--N----T----)--(--I--I--N----T----)
VINT
• INTEGRATOR OUTPUT VOLTAGE SWING
VINT = (---t--I--N---C-T---I-)-N-(--I--TI--N----T----)
• VINT MAXIMUM SWING:
(V- + 0.5V) < VINT < (V+ - 0.5V), VINT (Typ) = 2V
• DISPLAY COUNT
COUNT
=
1000
×
---V-----I-N-----
VREF
• CONVERSION CYCLE
tCYC = tCL0CK x 4000
tCYC = tOSC x 16,000
when fOSC = 48kHz; tCYC = 333ms
• COMMON MODE INPUT VOLTAGE
(V- + 1V) < VlN < (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.
• HI7106 POWER SUPPLY: SINGLE 9V
V+ - V- = 9V
Digital supply is generated internally
VGND ≅ V+ - 4.5V
• HI7106 DISPLAY: LCD
Type: Direct drive with digital logic supply amplitude.
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