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TC7117AIJL Datasheet

  • TC7117AIJL

  • 3-1/2 Digit Analog-to-Digital Converters with Hold

  • 22頁(yè)

  • MICROCHIP   MICROCHIP

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TC7116/A/TC7117/A
3-1/2 Digit Analog-to-Digital Converters with Hold
Features
鈥?Low Temperature Drift Internal Reference
- TC7116/TC7117 80 ppm/擄C Typ.
- TC7116A/TC7117A 20 ppm/擄C Typ.
鈥?Display Hold Function
鈥?Directly Drives LCD or LED Display
鈥?Zero Reading with Zero Input
鈥?Low Noise for Stable Display
- 2V or 200mV Full Scale Range (FSR)
鈥?Auto-Zero Cycle Eliminates Need for Zero
鈥?Adjustment Potentiometer
鈥?True Polarity Indication for Precision Null
Applications
鈥?Convenient 9V Battery Operation:
(TC7116/TC7116A)
鈥?High Impedance CMOS Differential Inputs: 10
12
鈩?/div>
鈥?Low Power Operation: 10mW
General Description
The TC7116A/TC7117A are 3-1/2 digit CMOS analog-
to-digital converters (ADCs) containing all the active
components necessary to construct a 0.05% resolution
measurement system. Seven-segment decoders,
polarity and digit drivers, voltage reference, and clock
circuit are integrated on-chip. The TC7116A drives liq-
uid crystal displays (LCDs) and includes a backplane
driver. The TC7117A drives common anode light emit-
ting diode (LED) displays directly with an 8mA drive
current per segment.
These devices incorporate a display hold (HLDR) func-
tion. The displayed reading remains indefinitely, as
long as HLDR is held high. Conversions continue, but
output data display latches are not updated. The refer-
ence low input (V
REF
-) is not available, as it is with the
TC7106/7107. V
REF
- is tied internally to analog com-
mon in the TC7116A/7117A devices.
The TC7116A/7117A reduces linearity error to less
than 1 count. Rollover error (the difference in readings
for equal magnitude but opposite polarity input signals)
is below 鹵1 count. High-impedance differential inputs
offer 1pA leakage current and a 10
12
鈩?/div>
input imped-
ance. The 15碌V
P-P
noise performance enables a 鈥渞ock
solid鈥?reading. The auto-zero cycle ensures a zero dis-
play reading with a 0V input.
The TC7116A and TC7117A feature a precision, low
drift internal reference, and are functionally identical to
the TC7116/TC7117. A low drift external reference is
not normally required with the TC7116A/TC7117A.
Applications
鈥?Thermometry
鈥?Bridge Readouts: Strain Gauges, Load Cells,
Null Detectors
鈥?Digital Meters: Voltage/Current/Ohms/Power, pH
鈥?Digital Scales, Process Monitors
鈥?Portable Instrumentation
Device Selection Table
Package Code
CPL
IJL
CKW
CLW
Package
40-Pin PDIP
40-Pin CERDIP
44-Pin PQFP
44-Pin PLCC
Temperature Range
0擄C to +70擄C
-25擄C to +85擄C
0擄C to +70擄C
0擄C to +70擄C
2002 Microchip Technology Inc.
DS21457B-page 1
漏

TC7117AIJL 產(chǎn)品屬性

  • Microchip

  • ADC（模數(shù)轉(zhuǎn)換器）

  • 1

  • 1

  • Dual Slope

  • 3.5 bit

  • Voltage

  • LED

  • Yes

  • Internal, External

  • 2290 mW

  • + 85 C

  • Through Hole

  • CDIP-40

  • - 25 C

  • 5 V

  • 10

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