AN052: Tips for Using Single-Chip 3 1/2 Digit A/D Converters

Tips for Using Single Chip 31/2 Digit
A/D Converters
®
Application Note
AN052
Author: Dan Watson
Introduction
ICL7660 voltage converter circuit can be used to generate
-5V at 20mA from the +5V supply. See Figures 1 and 2.
Since their introduction, the single-chip 31/2 digit A/D
converters have been widely accepted and used in a variety
of digital instrumentation applications. As the number of
applications for these low-cost circuits increases, so does
the number of specific questions about their operation.
The products covered are Intersil’s full line of single-chip 31/2
digit A/D converters. They are:
• ICL7106, ICL7116 for Liquid Crystal Displays (LCD)
• ICL7107, ICL7117 for Light Emitting Diode Displays (LED)
• ICL7126 Micropower Version for LCD
A great deal of versatility has been designed into these
devices. All have differential inputs for signal and reference.
This permits applications where input and reference are not
referred to ground; it also allows the ratio of two signals to be
digitally displayed. The devices also feature wide operating
ranges for power supply voltage and conversion time.
The first part of this application note will address the most
commonly asked questions, the second part consists of a
troubleshooting guide, the third section shows normal
waveforms, and the fourth gives formulae for component
values.
Commonly Asked Questions
Power Supply
Q: What is the minimum battery voltage from which the
ICL7106 or ICL7126 can operate?
A: If the internal voltage reference of the circuit is used, the
ICL7106 and ICL7126 will operate down to
approximately 6.5V. When the battery voltage drops
below that level the internal voltage reference will
degrade, directly affecting converter accuracy.
Once a proper dual polarity power supply has been set
up, the ICL7106 will make A/D conversions from input
voltage referred to power supply ground. Figures 3 and
4 show the use of the ICL7106 with internal and
external voltage reference. Note the 27kΩ pull up
resistor on analog COMMON (pin 32) when using an
external reference.
Q: How well regulated must the power supply for the
ICL7107 be?
A: The ICL7107, ICL7106, and ICL7126 have power supply
rejection ratios of 86dB typically, and a power supply with
50mV load regulation or better is recommended. High
frequency signals and spikes on the power supplies can get
into the A/D system, and should be bypassed to ground.
Q: How long will an ICL7106 and an ICL7126 operate from
a standard 9V battery?
A: A standard carbon-zinc 9V battery will provide 200
continuous hours of operation for the ICL7106 and 8,000
continuous hours for the ICL7126.
Q: How much power supply current is needed to operate the
ICL7107?
A: The supply current from the positive power supply varies
from 72mA to 200mA depending upon the combination
of display segments lighted. The ICL7107 (without
display current) requires typically 1.5mA from the
positive supply and 300μA from the negative supply.
+15V
μA7805
OR
ICL7663
A: The ICL7106 has been designed to be used with a 9V
battery. When ±15V supplies are used, they should be
converted to ±5V with simple three terminal regulators
such as μA7805 and μA7905, or the low power ICL7663
and ICL7664. If only a +5V supply is available, and
1
1
V+
REF HI
If an external voltage reference such as the ICL8069 is
used, a lower operating voltage can be used. Care must
be taken to ensure that the input common-mode voltage
range is not exceeded and that the integrator output swing
is kept within its linear region. (See appropriate discussion
in data sheets for specifics.) If these parameters are kept
in check the ICL7106 and ICL7126 will operate accurately
with a battery voltage as low as 4V.
Q: How can the ICL7106 be used with fixed system power
supplies?
(+5V)
REF LO
ICL7106
COM
IN HI
IN LO
36
35
32
31
30
VIN
VμA7905
OR
ICL7664
(-5V)
26
-15V
FIGURE 1. OPERATION FROM DUAL POLARITY SUPPLIES
WITH INTERNAL VOLTAGE REFERENCE
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
Application Note 052
V+
1
V+
COM
32
36
REF HI
ICL7106/
ICL7107
35
REF LO
+5V
IN LO
ICL
8069
1
V+
REF HI
IN HI
27K
36
27K
IN1
30
31
IN2
V26
REF LO
ICL7106
COM
IN HI
IN LO
8
+
10μF
2
ICL7660
4
V32
V+
(-5V)
ALTERNATIVE
PLACEMENT FOR
DIODE STACK
1
31
V+
36
REF HI
VIN
30
REF LO
V5
IN2
READING = ---------- × 1000
IN1
35
26
35
ICL7106/ IN HI 31
ICL7107
3
IN LO
+
10μF
COM
30
RSTD
4X 1N914 OR
1N4148
RX
32
V26
V-
FIGURE 2. OPERATION FROM +5V SUPPLY WITH
EXTERNAL VOLTAGE REFERENCE
FIGURE 3. EXAMPLES OF RATIOMETRIC OPERATION
+5V
+5V
DISPLAY
LED
±5V
SUPPLY
30
22-25
2-20
21
GROUND
DIGITAL
GND
1
V+
36
REF HI
GND
REF LO
ICL7107
COM
IN HI
IN LO
-5V
V-5V
35
32
31
VIN
30
ANALOG
GND
26
FIGURE 4. GROUNDING DETAIL FOR ICL7107
2
RX
READING = --------------- × 1000
R STD
Application Note 052
Q: What is the maximum power supply voltage for the
ICL7106 and ICL7107?
A: The ICL7106 has an absolute maximum battery voltage
rating of 15V from V+ (pin 1) to V- (pin 26). The ICL7107
has an absolute maximum rating of 6V from V+ to ground
(pin 21) and -9V from V- to ground. If the positive voltage
to the ICL7107 is greater than 6V, excessive power
dissipation will result. To increase LED brightness, use
external drivers such as SN7407 or discrete transistors;
see ICL7107 data sheet Figure 22.
Display
Q: How can the displayed reading of the ICL7106 or
ICL7107 be held for a time rather than continuously
updated?
A: The ICL7106 and ICL7107 are designed to continuously
update the display as each conversion is completed. For
applications where it is desirable to hold the displayed
reading, either the ICL7116 (LCD) or the ICL7117 (LED)
should be used. These parts are the same as the ICL7106
and ICL7107 except that they have built-in display hold
function and slightly different pinout configurations. When
the HLD terminal (pin 1) is connected to V+, the displayed
reading is frozen and the converter continues in its cycle;
when the HLD pin is connected to TEST or Digital Ground
(ICL7117 only) the display updates with each conversion.
The pinout differences are as follows:
60Hz noise in the integrator (200kHz for 50Hz rejection).
Since the signal integrate phase of the conversion cycle
is 1000 clock pulses long, and one cycle of 60Hz lasts
162/3ms, the internal clock frequency is:
1000
--------------------- = 60kHz
0.01667
The internal clock is generated by dividing the oscillator
frequency by four, therefore, the oscillator frequency
will be 240kHz. This corresponds to 15 conversions per
second. In applications where 50Hz or 60Hz rejection is
not required, the devices may be operated up to 30
readings per second (480kHz). At this high speed,
however, the devices may tend to read one count high.
Ratiometric Operation
Q: What is ratiometric operation and how can the ICL7107
or ICL7106 be operated in that manner?
A: In a ratiometric application, the ICL7106 and ICL7107
will display a reading which is proportional to the ratio of
two inputs. In this mode, one signal is connected
between INPUT HI and INPUT LO, and the other signal
is connected between REF HI and REF LO. For signals
which share a common connection, INPUT LO and REF
LO should be connected. See Figure 3. When the two
input signals are equal, the reading will be 1000. The
maximum readable ratio of two inputs is 1.999.
1. Pin 1 is the HLD pin.
Temperature
2. Pin 35 is the positive power supply pin.
Q: What variation in reading can be expected with the
ICL7106 or ICL7107 when used over the temperature
range of 0oC to 70oC?
3. REFerence LO is internally connected to the analog
COMMON point. REFerence LO does not connect to a
package pin separately.
Q: What types of displays should be used with the
ICL7106?
A: The ICL7106 drive signal is approximately 3.5VRMS with a
backplane frequency of 60Hz, and will drive almost any size
character liquid crystal display. The 0.5in variety is the most
common and inexpensive. Suitable displays include the
6FE0203-E and AND, the SX140 from Crystalloid, the
3902-315 from Hamlin, and the 7543-W-2 from LXD.
Q: What types of displays should be used with the
ICL7107?
A: Almost any common anode seven-segment LED display
will work with the ICL7107. The ICL7107 drives the LEDs
with current-limited outputs of 7mA to 8mA per segment;
this will automatically compensate the LEDs for different
V-I characteristics. For more contrast, use displays that
are more efficient. Suitable displays include the Hewlett
Packard 5082-7736/30, the ITAC MAN3730/10, the
Litronix DL710/7 and the Monsanto 4630/10.
Timing
Q: How fast can the ICL7106 or ICL7107 be operated?
A: The maximum oscillator frequency of the ICL7107 and
ICL7106 should normally be considered to be 240kHz.
This frequency is the highest frequency that will reject
3
A: To determine temperature stability of the circuit, analyze
each of the three sources of drift.
1. Offset drift is specified to be 1μV/oC maximum. For a
70oC change in temperature, a 70μV change in offset
will occur. If the A/D is set for a 200mV full scale, each
count corresponds to 100μV. The change in offset for
a 70oC change in temperature will be 70/100 or 0.7
counts maximum. In practice, offset drift is likely to be
much less than this.
2. Scale factor is specified to be 5ppm/oC maximum. A
70oC change in temperature corresponds to a change
in scale factor of 0.035%. The corresponding change
in reading will be 0.035% of 2000 counts, or 0.7 counts
maximum. In practice, scale factor drift is likely to be
much less than this.
3. The temperature coefficient of the internal voltage
reference is specified to be 80ppm/oC typically. A 70oC
change in temperature will cause a change in reading of
0.56%. The change in reading from this will be 0.56% of
2000 counts or 11.2 counts typically. This is clearly the
major source of error in absolute measurements.
Since using the internal reference of the ICL7106 can result
in a change in reading of 11.2 + 0.7 + 0.7 = 12.6 counts over
a change in temperature of 70oC, the use of an external
reference is recommended.
Application Note 052
Using an external reference such as the ICL8069, the
change in reading can be kept to 2.8 counts maximum. Such
an external reference is recommended for the ICL7107
because of the chip heating caused by power dissipation.
This power dissipation is due to the LED drivers, and is not a
significant factor when using the ICL7106 over a limited
temperature range.
One other effect of increasing temperature on the ICL7106
or ICL7107 is the increase of input leakage currents. This
has negligible effect on performance in most applications
when recommended component values are used. In more
critical applications, increasing the value of CREF and CAZ
will minimize these effects.
Components
Q: Can the ICL7126 plug directly into a socket previously
occupied by an ICL7106?
A: The ICL7126 and ICL7106 have identical pinout
configurations, however, some external component
values will have to be recalculated in order to use the
ICL7126.
1. The oscillator capacitor (pin 38) should be no more
than 50pF, and the oscillator frequency adjusted to
60kHz or less.
2. The current through the reference voltage divider (V+
to COMMON pin 32) should be limited to 10μA.
3. The integrating capacitor (pin 27) and resistor (pin 28)
values should be recalculated. See component
selection question or Component Formulae section of
this note for further details.
4. The auto-zero capacitor (pin 29) should be 0.33μF for
0.2V full scale, or 0.033μF for 2V full scale operation.
Q: What types and values of external passive components
should be used with the ICL7106, ICL7107, and
ICL7126?
A: The oscillator, integrator, and voltage reference divider
resistors may be carbon or metal film resistors with a
tolerance of 5%, the oscillator capacitor should be a
dipped mica or ceramic type with 10% tolerance, and the
reference and auto-zero capacitors should be either
polystyrene or Mylar™ types with 20% tolerance. The
integrating capacitor should be polypropylene, with
polystyrene and polycarbonate as second and third
choices, respectively. The integrating capacitor must
have good dielectric absorption characteristics for the
A/D converters to have optimum linearity.
The values for these components depend on the type of
converter used. See the Component Formulae section of
this application note. These formulas will give an
approximate value that is best for a given A/D converter. The
actual component value should be the closest standard
value that is available.
4
Troubleshooting Guide
When problems occur with the application of Intersil’s family
of 31/2 digit A/D converters, they can usually be divided into
three categories. These categories are:
1. Accuracy problems.
2. Display problems.
3. Functional problems.
Accuracy Problems
Problem - Above a certain input voltage level, the displayed
reading does not linearly track the input.
Action - Observe the waveform at the output of the
integrator stage (pin 27) of the A/D converter. There should
be no clipping at the positive and negative peaks of the
ramped waveform. The value of RINT or CINT may be too
small, or the oscillator frequency may be too low, allowing
the integrator to saturate. See previous section on
component value selection.
Problem - For a constant input voltage, there is a difference
in the absolute value of the reading when only the polarity is
reversed.
Action - This problem is called “rollover error” and is usually
eliminated by proper selection of the integrating capacitor
connected to pin 27. A capacitor with good dielectric
absorption characteristics is required; polypropylene or
polystyrene are the best types of capacitors to use here.
Another possible source is that CREF is too small, or that
there is excessive stray capacitance to ground from its pins
(see AN032).
Problem - For a constant input level, the displayed reading
varies as the positive power supply voltage varies.
Action - The connection to analog COMMON (pin 32)
should be checked. If the internal voltage reference is used,
analog COMMON should not be grounded, but rather
should be connected to REF LO (pin 35), as shown in
Figure 1.
Problem - The displayed reading of the ICL7106 or ICL7107
is not constant for constant input, and changes several
counts from one reading to the next.
Action - The connection to analog COMMON should be
checked. If external voltage reference is used, the COMMON
pin should have a pullup resistor of 27kΩ connected between it
and the positive power supply, as shown in Figure 2.
Problem - With the voltage inputs shorted together, there is
an offset reading of several counts.
Action - The size of the reference capacitor is too small, or
the type of capacitor is too leaky. Use a Mylar™ capacitor of
1μF in most applications. Only in applications where input
and reference voltage are referred to ground as a common
point will a 0.1μF capacitor be satisfactory.
Application Note 052
Problem - The evaluation kit has been carefully assembled
and displays an offset error of several counts when inputs
are shorted together.
Action - This is an indication that the oscillator is not
functioning. Check oscillator components and printed circuit
board for leakage paths around pins 38, 39, and 40.
Action - Proper cleaning of the printed circuit board after
assembly should eliminate any leakage paths.
Problem - The overrange condition (+ or -1 and blank) is
continually shown regardless of input voltage.
Display Problems
Action - Check to see if input voltage between pins 30 and
31 is greater than twice the reference voltage. Also check to
see that the reference voltage (between pins 35 and 36) or
CREF is not shorted out in some way.
Problem - The displayed reading of the ICL7107 is not
stable and changes every conversion cycle.
Action - The connections to power supply ground and signal
grounds must be carefully routed to avoid noise problems.
Digital ground (pin 21) carries all the LED return current, and
should only be connected to INput LO (pin 30) at the power
supply terminals. Figure 4 shows how this grounding should
be done to keep the LED current from generating a noisy
input voltage.
Problem - Excess power supply current is drawn after the
TEST pin is pulled high and then low.
Action - Make sure that when the TEST pin is dropped it is
allowed to float and not returned to the negative power
supply level.
Problem - As power is applied to the ICL7107 with constant
input voltage, the reading changes with time and only after a
few minutes is stable.
Action - This is caused by the use of the internal reference
of the ICL7107 in applications where external LED displays
are also being driven. The power dissipated by the LED
drivers causes internal chip heating which causes the
internal voltage reference to drift. This can be avoided by
using an external voltage reference such as the ICL8069,
which is considerably more stable than the internal reference
of the ICL7107. See Figure 2 for connections.
Problem - The LED display driven by the ICL7107 is not
bright enough.
Action - The ICL7107 will typically drive 8mA per segment.
This current cannot be varied upward, and will be the same
regardless of the size and type of display. To increase
brightness, the user should either pick the most efficient
display available or use external drivers such as 7407 open
collector buffers.
Problem - The LCD display connected to an ICL7106 is
weak and occasionally displays incomplete characters.
Action - Low power supply or battery voltage will cause the
LCD display to have low contrast. Temperature extremes
below 0oC will also cause problems with LCD displays.
Problem - There is permanent distortion or “burning” of the
LCD display after prolonged use.
Action - LCD display damage is caused when there is DC
drive to a segment or decimal point. Holding the TEST pin (pin
37) high for a long period may also cause display damage.
Functional Problems
Problem - When power is applied to the A/D converter it
displays 1666 steadily and does not change.
5
1
V+
36
REF HI
REF LO
35
+
9V
32
ICL7106,
COM
ICL7126
IN HI
IN LO
31
30
VIN
V26
FIGURE 5. OPERATION FROM 9V BATTERY WITH
INTERNAL VOLTAGE REFERENCE
Normal Waveforms
Integrator output and buffer amplifier waveforms are shown
in Figures 6 and 7 for the two most common configurations
of the ICL7106, ICL7107, and ICL7126. Figure 5 shows
battery operation with COMMON (pin 32) shorted to INput
LO (pin 30). In this case, all voltage measurements are
made with respect to COMMON, which is internally set to
2.8V below V+ terminal (pin 1). During the auto-zero phase
of the conversion cycle both INTegrator and BUFFer
amplifier outputs are at VCOM, the voltage on pin 32. When
the integrate portion of the cycle begins, the buffer is
switched to the input voltage, VIN, and its output goes to a
level equal to VCOM + VIN. In Figures 6 and 7, the solid line
shows the negative input voltage, and the dotted line
represents the positive input voltage. During this phase the
integrator will ramp in a direction opposite to the input
voltage polarity. During the third (de-integrate) phase of the
conversion cycle the reference capacitor (pins 33 and 34) is
switched between COMMON and the BUFFer amplifier input
with the right polarity to make the integrator ramp back to its
starting voltage, VCOM.
Application Note 052
phase of the cycle, deintegration takes place with respect
to VCOM and the conversion is complete when the
INTegrator output equals VCOM.
Dual power supply operation is shown in Figure 1 for the
ICL7106 and in Figure 4 for the ICL7107, with INput LO
connected to ground in both cases. Figure 7 shows the
INTegrator and BUFFer amplifier outputs at VCOM during
the auto-zero part of the conversion cycle, just as in the
case of Figures 5 and 6. When the integrate phase starts,
the buffer and integrator are switched so that their inputs
are referred to ground rather than VCOM. The BUFFer
OUTput goes to a voltage corresponding to VIN, and the
integrator begins ramping from ground in a direction
opposite to the input voltage polarity. During the third
AUTO-ZERO
PHASE
INTEGRATE
PHASE
Figures 8 and 9 show normal clock (OSC 3) and LCD driver
waveforms (ICL7106 and ICL7126). Note that in Figures 6
and 7, the buffer and integrator input offset voltages
(typically about 20mV) have been neglected. These will
move the baselines by the corresponding amount, but will
not affect the actual waveforms themselves.
DE-INTEGRATE
PHASE
VCOM
INTEGRATOR
PIN 27
VIN +
VCOM + VREF
VREF
VCOM
BUFFER
PIN 28
VCOM + VIN
VIN -
VREF
IN LO (PIN 30) = COMMON (PIN 32)
SOLID LINE FOR VIN < 0
DOTTED LINE FOR VIN > 0
FIGURE 6. INTEGRATOR AND BUFFER WAVEFORMS FOR CIRCUIT OF FIGURE 5
AUTO-ZERO
PHASE
INTEGRATOR
PIN 27
INTEGRATE
PHASE
DE-INTEGRATE
PHASE
VCOM
GROUND
VCOM + VREF
BUFFER
PIN 28
VREF
VCOM
VIN +
VREF
GROUND
VIN
VIN -
IN LO (PIN 30) = GROUND
COMMON (PIN 32) = REF LO (PIN 35)
SOLID LINE FOR VIN < 0
DOTTED LINE FOR VIN > 0
FIGURE 7. INTEGRATOR AND BUFFER WAVEFORMS FOR ICL7106, ICL7126 CONNECTED AS IN FIGURE 1, OR ICL7107
CONNECTED AS IN FIGURE 4
6
Application Note 052
Auto-Zero Cap (CAZ)
R = 100kΩ, C = 100pF
RANGE
V+
CLOCK
(OSC 3)
VTEST
ICL7106, ICL7107
ICL7126
200mV Scale
0.47μF
0.33μF
2.0V Scale
0.047μF
0.033μF
The value for CAZ should be approximately twice the value
for CINT. Increasing CAZ will reduce noise, but slow down
recovery from overload or start-up. See Application Note
AN032 [5] for more details.
Oscillator Frequency
0.45
f OSC = --------------------------------------- (approximately)
R OSC × C OSC
21μs
(48kHz)
FIGURE 8. CLOCK WAVEFORM ON OSC 3 (PIN 38)
where ROSC > 50kΩ and COSC > 50pF for ICL7106, ICL7107
and where COSC ~ 50pF and fOSC ≤ 60kHz for ICL7126.
Note that changing the oscillator frequency may require a
change in the value of CINT and CAZ. Also note that the
internal clock frequency is equal to one-fourth of the
oscillator frequency.
V+ BACKPLANE OR
“OFF” SEGMENT
VTEST
V+
“ON” SEGMENT
VTEST
16.6ms
(60Hz)
FIGURE 9. LCD DRIVE WAVEFORMS FOR ICL7106 AND
Component Formulae
Integrator Resistor and Capacitor (RINT , CINT)
Reference Cap (CREF)
Use 1.0μF for high input to reference common mode
voltages or 2.0V full scale input range.
Use 0.1μF for low input to reference common mode
voltages.
Other Products
Much of the discussion given here is also relevant to other
A/D converters, such as the ICL7109 and ICL7135, which
have an analog section almost identical to that of the
ICL7106/ICL7107 etc., and even to chip pairs such as the
ICL8052/ICL71C03 and ICL8052/ICL7104.
OSCILLATOR
FREQUENCY (kHz)
CONVERSIONS
PER SECOND
FREQUENCY
REJECTED (Hz)
240
15
60
Full scale input voltage
R INT = -------------------------------------------------------------I INT
200
12.5
50
4000 × I INT
C INT = ------------------------------------------------------------------Integrator swing × f OSC
120
7.5
60
100
6.25
50
80
5
60
66.66
4.16
50
where IINT is integrator drive current and fOSC is oscillator
frequency.
60
3.75
60
For ICL7106, ICL7107
IINT = 4μA
50
3.12
50
For ICL7126
IINT = 1μA
48
3
60
40
2.5
50 and 60
34.28
2.14
60
33.33
2.08
50
30
1.87
60
25
1.56
50
Full scale input voltage is normally that input voltage that will
just read (-)1999 or overrange. However, if a more restrictive
input (and reading) range is in use, the larger of this
maximum input voltage or the reference voltage may be
used instead.
Integrator swing for ICL7106 and ICL7126 battery operation
is 2V. Integrator swing for ±5V supply operation is 3.5V.
7
24
1.5
60
20
1.25
50 and 60
Application Note 052
Other Application Notes
Some other application notes that may be found useful:
[1] AN016 Application Note, Intersil Corporation, “Selecting
A/D Converters”, Dave Fullagar.
[2] AN017 Application Note, Intersil Corporation, “The
Integrating A/D Converter”, Lee Evans.
[3] AN018 Application Note, Intersil Corporation, “Do’s and
Don’ts of Applying A/D Converters”, Peter Bradshaw
and Skip Osgood.
[4] AN023 Application Note, Intersil Corporation, “Low Cost
Digital Panel Meter Designs and Complete Instruction
for LCD and LED Kit”, David Fullagar and Michael
Dufort.
[5] AN032 Application Note, Intersil Corporation
“Understanding the Auto-Zero and Common Mode
Performance of the ICL7106/7107/7109 Family”, Peter
Bradshaw.
[6] AN046 Application Note, Intersil Corporation, “Building a
Battery Operated Auto Ranging DVM with the
ICL7106”.
[7] AN051 Application Note, Intersil Corporation, “Principals
and Applications of the ICL7660 Voltage Converter”,
Peter Bradshaw and Dave Bingham.
For Intersil documents available on the internet, see web site
http://www.intersil.com.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
8
Similar pages