Datasheet
Table Of Contents
- 1.0 Electrical characteristics
- 2.0 Pin Descriptions
- 3.0 Detailed Description
- 4.0 Typical Applications
- 4.1 TC7129 as a Replacement Part
- 4.2 Powering the TC7129
- 4.3 Connecting to External Logic
- 4.4 Temperature Compensation
- 4.5 RC Oscillator
- 4.6 Measuring Techniques
- 4.7 Dual-Slope Conversion
- 4.8 Successive Integration
- 4.9 Digital Auto-Zeroing
- 4.10 Inside the TC7129
- 4.11 Integrator Section
- 4.12 Continuity Indicator
- 4.13 Common and Digital Ground
- 4.14 Low Battery
- 4.15 Sequence and Results Counter
- 4.16 Overrange and Underrange Outputs
- 4.17 LATCH/Hold
- 4.18 Display Driver
- 5.0 Packaging Information
- 6.0 Revision History
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TC7129
DS21459E-page 6 2002-2012 Microchip Technology Inc.
36 34 40 DGND Internal ground reference for digital section. See Section 4.2.1
“±5V Power Supply”.
37 35 41 RANGE 3 A pull-down for 200 mV scale. Pulled high externally for 2V
scale.
3 8 3 6 4 2 D P
2
Internal 3 A pull-down. When high, decimal point 2 will be on.
39 37 43 DP
1
Internal 3 A pull-down. When high, decimal point 1 will be on.
40 38 44 OSC2 Output of first clock inverter. Input of second clock inverter.
— 6,17, 28, 39 12, 23, 34, 1 NC No connection.
TABLE 2-1: PIN FUNCTION TABLE (CONTINUED)
Pin No.
40-Pin PDIP
Pin No.
44-Pin PQFP
Pin No.
44-Pin PLCC
Symbol Function