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TC815 数据表(PDF) 13 Page - Microchip Technology

部件名 TC815
功能描述  3-1/2 Digit Auto-Ranging A/D Converter with Triplex LCD Drive and Display Hold Function
PDF  26 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

TC815 数据表(HTML) 13 Page - Microchip Technology

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© 2002 Microchip Technology Inc.
DS21474B-page 13
TC815
FIGURE 5-1:
MANUAL RANGE
SELECTION: RESISTANCE
MEASUREMENTS
For resistance measurements, the buzzer signal does
not indicate an overrange condition. The buzzer is used
to indicate continuity. Continuity is defined as a resis-
tance reading less than 19 counts.
FIGURE 5-2:
MANUAL RANGE
SELECTION: CURRENT
MEASUREMENTS
FIGURE 5-3:
MANUAL RANGE
SELECTION: VOLTAGE
MEASUREMENTS
5.1
Extended Resolution
Manual Operation
The TC815 extends resolution by 50% when operated
in the Manual Range Select mode for current, voltage,
and resistance measurements. Resolution increases to
3000 counts from 2000 counts. The extended resolu-
tion feature operates only on the 2000k
Ω and 2000V
ranges during auto-range operation.
In the Extended Resolution Operating mode, readings
above 1999 are displayed with a blinking “1” most sig-
nificant digit. The blinking “1” should be interpreted as
the digit 2. The three least significant digits display data
normally.
An input overrange condition causes the most signifi-
cant digit to blink and sets the three least significant
digits to display “000.” The buzzer output is enabled for
input voltage and current signals with readings greater
than 2000 counts in both manual and auto-range
operation.
Manual Range
Select
Is
RX < 19
?
Output 4kHz
Audio
Frequency
Is
RX > 3000
?
Is
RX > 2000
?
Display "1" 000
Display Last
3 Digits and Flash
MSD
Extended
Resolution
Feature
*Mode also operates when Auto-Ranging Operation
is selected and 2M
Ω < RX < 2.999MΩ
"1" = > Flashing MSD
No
Yes
Yes
No
No
Yes*
Over Range Indicator
Continuity
Indicator
Continuous 4kHz
Buzzer
Display True
Reading
TC815
Range
Select
Output 4kHz
Audio
Frequency
Is
I
X > 3000
?
Is
I
X > 2000
?
Display
"1" 000
Display Last
3 Digits and Flash
MSD
Extended
Resolution
Feature
"1" = > Flashing MSD
Yes
Yes
No
No
Yes
Over Range Indicator
Display True
Reading
TC815
Range Select
Output Noncontinuous
4kHz Audio
Frequency
Is
VX > 3000
?
Is
VX > 2000
?
Display
"1" 000
Display Last 3 Digits
and Flash
MSD
Extended Resolution
Feature
"1" = > Flashing MSD
Yes
No
No
Yes
Over Range Indicator
Display True
Reading
TC815



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