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PDF ICL7106S Data sheet ( Hoja de datos )
| Número de pieza | ICL7106S | |
| Descripción | 31/2 Digit/ LCD/LED Display/ A/D Converters | |
| Fabricantes | Intersil | |
| Logotipo |  |
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January 1998
ICL7106, ICL7107,
ICL7106S, ICL7107S
31/2 Digit,
LCD/LED Display, A/D Converters
Features
• Guaranteed Zero Reading for 0V Input on All Scales
• True Polarity at Zero for Precise Null Detection
• 1pA Typical Input Current
• True Differential Input and Reference, Direct Display Drive
- LCD ICL7106, LED lCL7107
• Low Noise - Less Than 15µVP-P
• On Chip Clock and Reference
• Low Power Dissipation - Typically Less Than 10mW
• No Additional Active Circuits Required
• Enhanced Display Stability (ICL7106S, ICL7107S)
Ordering Information
PART NO.
TEMP.
RANGE (oC)
PACKAGE
PKG. NO.
Description
The Intersil ICL7106 and ICL7107 are high performance, low
power, 31/2 digit A/D converters. Included are seven seg-
ment decoders, display drivers, a reference, and a clock.
The ICL7106 is designed to interface with a liquid crystal dis-
play (LCD) and includes a multiplexed backplane drive; the
ICL7107 will directly drive an instrument size light emitting
diode (LED) display.
The ICL7106 and ICL7107 bring together a combination of
high accuracy, versatility, and true economy. It features auto-
zero to less than 10µV, zero drift of less than 1µV/oC, input
bias current of 10pA (Max), and rollover error of less than
one count. True differential inputs and reference are useful in
all systems, but give the designer an uncommon advantage
when measuring load cells, strain gauges and other bridge
type transducers. Finally, the true economy of single power
supply operation (ICL7106), enables a high performance
panel meter to be built with the addition of only 10 passive
components and a display.
ICL7106CPL
0 to 70 40 Ld PDIP
E40.6
ICL7106RCPL
0 to 70 40 Ld PDIP (Note) E40.6
ICL7106CM44
0 to 70 44 Ld MQFP
Q44.10x10
ICL7106SCPL
0 to 70 40 Ld PDIP
E40.6
ICL7107SCPL
0 to 70 40 Ld PDIP
E40.6
ICL7107CPL
0 to 70 40 Ld PDIP
E40.6
ICL7107RCPL
0 to 70 40 Ld PDIP (Note) E40.6
ICL7107CM44
0 to 70 44 Ld MQFP
Q44.10x10
NOTE: “R” indicates device with reversed leads for mounting to PC
board underside. “S” indicates enhanced stability.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999 1
File Number 3082.2
1 page  
ICL7106, ICL7107, ICL7106S, ICL7107S
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---V-T---I-)-N-(--I-T-I--N----T----)
• INTEGRATOR OUTPUT VOLTAGE SWING
VINT
=
(---t--I--N----T----)--(--I--I--N----T----)
CINT
• VINT MAXIMUM SWING:
(V- + 0.5V) < VINT < (V+ - 0.5V), VINT (Typ) = 2V
• DISPLAY COUNT
COUNT = 1000 × V---V--R---I-EN----F-
• 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.
• ICL7106 POWER SUPPLY: SINGLE 9V
V+ - V- = 9V
Digital supply is generated internally
VGND ≅ V+ - 4.5V
• ICL7106 DISPLAY: LCD
Type: Direct drive with digital logic supply amplitude.
• ICL7107 POWER SUPPLY: DUAL ±5.0V
V+ = +5V to GND
V- = -5V to GND
Digital Logic and LED driver supply V+ to GND
• ICL7107 DISPLAY: LED
Type: Non-Multiplexed Common Anode
Typical Integrator Amplifier Output Waveform (INT Pin)
AUTO ZERO PHASE
(COUNTS)
2999 - 1000
SIGNAL INTEGRATE
PHASE FIXED
1000 COUNTS
DE-INTEGRATE PHASE
0 - 1999 COUNTS
TOTAL CONVERSION TIME = 4000 x tCLOCK = 16,000 x tOSC
5
5 Page 
ICL7106, ICL7107, ICL7106S, ICL7107S
Typical Applications
Application Notes
The ICL7106 and ICL7107 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.
The following application notes contain very useful
information on understanding and applying this part and are
available from Intersil Corporation.
NOTE #
DESCRIPTION
AN016 “Selecting A/D Converters”
AN017 “The Integrating A/D Converter”
AN018 “Do’s and Don’ts of Applying A/D
Converters”
AnswerFAX
DOC. #
9016
9017
9018
AN023 “Low Cost Digital Panel Meter Designs”
9023
AN032 “Understanding the Auto-Zero and
Common Mode Performance of the
ICL7136/7/9 Family”
9032
AN046 “Building a Battery-Operated Auto
Ranging DVM with the ICL7106”
AN052 “Tips for Using Single Chip 31/2 Digit A/D
Converters”
9046
9052
Typical Applications
OSC 1 40
OSC 2 39
OSC 3 38
TEST 37
REF HI 36
REF LO 35
CREF 34
CREF 33
COMMON 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V - 26
G2 25
C3 24
A3 23
G3 22
BP 21
TO PIN 1
100kΩ
100pF
SET VREF
= 100mV
1kΩ 22kΩ
0.1µF
0.47µF
47kΩ
1MΩ
0.01µF
0.22µF
+
IN
-
+
9V
-
TO DISPLAY
TO BACKPLANE
OSC 1 40
OSC 2 39
OSC 3 38
TEST 37
REF HI 36
REF LO 35
CREF 34
CREF 33
COMMON 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V - 26
G2 25
C3 24
A3 23
G3 22
GND 21
TO PIN 1
100kΩ
100pF
SET VREF
= 100mV
1kΩ 22kΩ
0.1µF
0.47µF
47kΩ
1MΩ
0.01µF
+5V
+
IN
-
0.22µF
-5V
TO DISPLAY
Values shown are for 200mV full scale, 3 readings/sec., floating
supply voltage (9V battery).
Values shown are for 200mV full scale, 3 readings/sec. IN LO may
be tied to either COMMON for inputs floating with respect to
supplies, or GND for single ended inputs. (See discussion under
Analog COMMON.)
FIGURE 11. ICL7106 USING THE INTERNAL REFERENCE
FIGURE 12. ICL7107 USING THE INTERNAL REFERENCE
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ICL7106S.PDF ] | |
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