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TC815

Status: End of Life

Features:

  • Auto-Range Operation for AC and DC Voltage and Resistance Measurements – Two User Selected AC/DC Current Ranges 20mA and 200mA   22 Operating Ranges – 9 DC/AC Voltage – 4 AC/DC Current – 9 Resistance and Low Power Ohms Display HOLD Function 3 1/2 Digit Resolution in Auto-Range Mode 1/2000 – Extended Resolution in Manual Mode .. 1/3000 Memory Mode for Relative Measurements ... ±5% F.S. Internal AC to DC Conversion Op Amp Triplex LCD Drive for Decimal Points, Digits and Annunciators Continuity Detection and Piezoelectric Transducer Driver Compact Surface Mounted 64-pin Plastic Flat Package Low Drift Internal Reference ................... 75ppm/°C 9V Battery Operation ............................... 10mW Low Battery Detection and LCD Annunciator
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Device Overview

Summary

The TC815 is a 3 1/2 digit integrating analog-to-digital converter with triplex LCD display drive and automatic ranging. A display hold function is on-chip.Input voltage/ohm attenuators ranging from 1 to 1/10,000 are automatically selected. Five full-scale ranges are provided. The CMOS TC815 contains all the logic and analog switches needed to manufacture an auto-ranging instrument for ohms and voltage measurements. User selected 20mA and 200mA current ranges are available. Full-scale range and decimal point LCD annunciators are automatically set in auto-range operation. Auto-range operation is available during ohms (high and low power ohms) and voltage (AC and DC) measurements,eliminating expensive range switches in hand-held DMM designs. The auto-range feature may be bypassed allowing decimal point selection and input attenuator selection control through a single line input. Expensive rotary switches are not required. During manual mode operation resolution is extended to 3000 counts full-scale.The extended range operation is indicated by a flashing 1 MSD.The extended resolution is also available during 200k ? and 2000V full-scale auto-range operation. The memory mode subtracts a reading —up to ±5% of full-scale —from subsequent measurements. Typical applications involve probe resistance compensation for resistance measurements, tolerance measurements,and tare weight measurements. The TC815 includes an AC to DC converter for AC measurements. Only external diodes/resistors/capacitors are required. A complete LCD annunciator set describes the TC815 meter function and measurement range during ohms, voltage and current operation. AC measurements are indicated as well as auto-range operation. A low battery detection circuit also sets the low battery display annunciator. The triplex LCD display drive levels may be set and temperature compensation applied via the VDISP pin. With HOLD low the display is not updated.A HOLD mode LCD annunciator is activated.

Please consider this device TC7116A , TC7126A

Additional Features
Auto-Range Operation for AC and DC Voltage and Resistance Measurements
– Two User Selected AC/DC Current Ranges 20mA and 200mA
  22 Operating Ranges
– 9 DC/AC Voltage
– 4 AC/DC Current
– 9 Resistance and Low Power Ohms
Display HOLD Function
3 1/2 Digit Resolution in Auto-Range Mode 1/2000
– Extended Resolution in Manual Mode .. 1/3000
Memory Mode for Relative Measurements ... ±5% F.S.
Internal AC to DC Conversion Op Amp
Triplex LCD Drive for Decimal Points, Digits and Annunciators
Continuity Detection and Piezoelectric Transducer Driver
Compact Surface Mounted 64-pin Plastic Flat Package
Low Drift Internal Reference ................... 75ppm/°C
9V Battery Operation ............................... 10mW
Low Battery Detection and LCD Annunciator
Parametrics
Name
Value
Supply Voltage (V)
9
Power (mW)
13.5
Hold Function
Yes
Resolution (Digits)
3.5
Resolution (Counts)
2000
Display Type
LCD

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Data Sheet

11/08/2005
575KB

Product Line Card


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