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TC7129CKW Datasheet

  • TC7129CKW

  • 4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Dr...

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  • MICROCHIP   MICROCHIP

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TC7129
4-1/2 Digit Analog-to-Digital Converters with
On-Chip LCD Drivers
Features
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Count Resolution: 鹵19,999
Resolution on 200mV Scale: 10碌V
True Differential Input and Reference
Low Power Consumption: 500碌A(chǔ) at 9V
Direct LCD Driver for 4-1/2 Digits, Decimal Points,
Low Battery Indicator, and Continuity Indicator
Over Range and Under Range Outputs
Range Select Input: 10:1
High Common Mode Rejection Ratio: 110dB
External Phase Compensation Not Required
General Description
The TC7129 is a 4-1/2 digit analog-to-digital converter
(ADC) that directly drives a multiplexed liquid crystal
display (LCD). Fabricated in high performance, low
power CMOS, the TC7129 ADC is designed specifi-
cally for high resolution, battery powered digital multi-
meter applications. The traditional dual slope method
of A/D conversion has been enhanced with a succes-
sive integration technique to produce readings accu-
rate to better than 0.005% of full scale, and resolution
down to 10碌V per count.
The TC7129 includes features important to multimeter
applications. It detects and indicates low battery condi-
tion. A continuity output drives an annunciator on the
display, and can be used with an external driver to
sound an audible alarm. Over range and under range
outputs and a range change input provide the ability to
create auto-ranging instruments. For snapshot read-
ings, the TC7129 includes a latch-and-hold input to
freeze the present reading. This combination of features
makes the TC7129 the ideal choice for full featured
multimeter and digital measurement applications.
Applications
鈥?Full Featured Multimeters
鈥?Digital Measurement Devices
Device Selection Table
Package
Code
TC7129CPL
TC7129CKW
TC7129CLW
Pin
Layout
Normal
Formed
鈥?/div>
Package
40-Pin PDIP
44-Pin PQFP
44-Pin PLCC
Temperature
Range
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
Typical Application
Low Battery
Continuity
V+
5pF
20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
TC7129
120kHz
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
330k鈩?/div>
*
0.1碌F
1碌F
150k鈩?/div>
+
+
0.1
碌F
10pF
20
k鈩?/div>
0.1碌F
V+
10k鈩?/div>
9V
鈥?/div>
100k鈩?/div>
+
*Note:
RC network between Pins 26 and 28 is not required.
V
IN
2002 Microchip Technology Inc.
DS21459B-page 1
漏

TC7129CKW 產(chǎn)品屬性

  • 96

  • 集成電路 (IC)

  • PMIC - 顯示器驅(qū)動器

  • -

  • LCD

  • 7 段顯示

  • -

  • A/D，4.5 位數(shù)字

  • 800µA

  • 6 V ~ 12 V

  • 0°C ~ 70°C

  • 表面貼裝

  • 44-QFP

  • 44-PQFP（10x10）

  • 托盤

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