1
TC811
3-1/2 DIGIT A/D CONVERTER WITH HOLD AND DIFFERENTIAL
REFERENCE INPUTS
FEATURES
s
s
s
s
s
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s
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s
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Differential Reference Input
Display Hold Function
Fast Over-Range Recovery, Guaranteed Next
Reading Accuracy
Low Temperature Drift Internal
Reference ....................................... 35ppm/
擄
C (Typ)
Guaranteed Zero Reading With Zero Input
Low Noise ..................................................... 15
碌
V
p-p
High Resolution (0.05%) and Wide Dynamic
Range (72 dB)
High Impedance Differential Input
Low Input Leakage Current ....................... 1pA Typ
10pA Max
Direct LCD Drive 鈥?No External Components
Precision Null Detection with True Polarity at Zero
Crystal Clock Oscillator
Available in DIP, Compact Flat Package or PLCC
Convenient 9V Battery Operation with
Low Power Dissipation (600
碌
A Typical, 1mW
Maximum)
2
3
4
Max V
REF
Tempco
TYPICAL APPLICATIONS
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s
Thermometry
Digital Meters
鈥?Voltage/Current/Power
鈥?pH Measurement
鈥?Capacitance/Inductance
鈥?Fluid Flow Rate/Viscosity
鈥?Humidity
鈥?Position
Panel Meters
LVDT Indicators
Portable Instrumentation
Digital Scales
Process Monitors
Gaussometers
Photometers
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ORDERING INFORMATION
Part No.
Package
Temp.
Range
FUNCTIONAL BLOCK DIAGRAM
TC811CKW 44-PQFP
0擄C to +70擄C 75 ppm/擄C
TC811CPL 40-Pin Plastic DIP 0擄C to +70擄C 75 ppm/擄C
TYPICAL SEGMENT OUTPUT
+
V
0.5mA
SEGMENT
OUTPUT
2mA
5
6
7
LCD DISPLAY
TC811CPL
INTERNAL DIGITAL GROUND
BACKPLANE
21
+
C REF
+
VREF
35
36
CREF
鈥?/div>
VREF
33
RINT
鈥?/div>
C REF V BUFF
34
28
V
+
38
CAZ
CINT
VINT
LCD SEGMENT DRIVERS
29
INTEGRATOR
27
TO
DIGITAL
SECTION
7 SEGMENT
DECODE
7 SEGMENT
DECODE
7 SEGMENT
DECODE
200
10
碌A(chǔ)
31
INT
A/Z
32
ZI & A/Z
ZI &
A/Z
鈥?/div>
+
ZI
鈥?/div>
+
+
鈥?/div>
DATA LATCH
A/Z
COMPARATOR
THOUSANDS
HUNDREDS
TENS
UNITS
+
V IN
DE
(鈥?
DE
(+)
鈥?/div>
LOW
TEMPCO
VREF
ANALOG
COMMON
DE (+)
DE (鈥?
+
V+鈥?3.0V
TO SWITCH DRIVERS
FROM COMPARATOR OUTPUT
CLOCK
fOSC
鈮?0k鈩?/div>
4
CONTROL LOGIC
38
6.2V
V+
鈥?30
V IN
INT
AZ & DE (鹵)
26
鈥?/div>
INTERNAL DIGITAL GOUND
TEST
VTH
= 1V
1
500鈩?/div>
26
V鈥?/div>
V
40
OSC 1
39
22M鈩?/div>
OSC 2
HLDR
470k
V
+
10pF
kH
20pF
V
+
8
TC811-7 11/5/96
TELCOM SEMICONDUCTOR, INC.
3-137
TC811CKW相關(guān)型號PDF文件下載
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