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TC820CPL

3-3/4 digit A/D converter with frequency counter and logic probe

Microchip Technology 

TC820

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

Supply Voltage (VDD to GND) ................................ 15V

Analog Input Voltage:

(Either Input) (Note 1) ............................ VDD to VSS

Reference Input Voltage (Either Input) ....... VDD to VSS

Digital Inputs........................................... VDD to DGND

VDISP ....................................... VDD to (DGND – 0.3V)

Package Power Dissipation (TA – 70°C) (Note 2):

40-Pin Plastic DIP ......................................... 1.23W

44-Pin PLCC ..................................................1.23W

44-Pin Plastic Flat Package (PQFP) ..............1.00W

Operating Temperature Range:

"C" Devices ......................................... 0°C to +70°C

"E" Devices.......................................-40°C to +85°C

Storage Temperature Range .............. -65°C to +150°C

*Stresses above those listed under "Absolute Maximum

Ratings" may cause permanent damage to the device. These

are stress ratings only and functional operation of the device

at these or any other conditions above those indicated in the

operation sections of the specifications is not implied.

Exposure to Absolute Maximum Rating conditions for

extended periods may affect device reliability.

TC820 ELECTRICAL SPECIFICATIONS

Electrical Characteristics: VS = 9V, TA = 25°C, unless otherwise specified.

Symbol

Parameter

Min

Typ

Max

Units

Test Conditions

RE

NL

CMRR

VCMR

eN

Zero Input Reading

Rollover Error

Nonlinearity

(Maximum Deviation From Best

Straight Line Fit)

Ratiometric Reading

Common Mode Rejection Ratio

-000

-1

-1

1999

—

±000

±0.2

±0.2

1999/2000

50

Common Mode Voltage Range VSS + 1.5

—

Noise (P-P Value Not

—

15

Exceeded 95% of Time)

+000

+1

+1

Digital

Reading

Counts

Count

VIN = 0V

Full Scale = 400mV

VIN = ±390mV

Full Scale = 400mV

Full Scale = 400mV

2000

—

VDD – 1

—

—

µV/V

µV

VIN = VREF, TC820

VCM = ±1V, VIN = 0V

Full Scale = 400mV

(VFS = 200mV)

Input High, Input Low

VIN = 0V

Full Scale = 400mV

IIN

VCOM

VCTC

Note 1:

2:

Input Leakage Current

—

—

—

—

VIN = 0V

—

1

10

pA

TA = 25°C

—

20

—

pA

0°C ≤ TA ≤ +70°C

—

100

—

pA

-40°C ≤ TA ≤ +85°C

Analog Common Voltage

3.15

3.3

3.45

V

25kΩ between Common and

VDD (VSS - VCOM)

Common Voltage Temperature

—

—

—

—

25kΩ Between Common and

Coefficient

VDD

—

35

50

ppm/°C 0°C ≤ TA ≤ +70°C

—

50

—

—

-40°C ≤ TA ≤ +85°C

Input voltages may exceed the supply voltages provided that input current is limited to ±100µA. Current above this value

may result in invalid display readings, but will not destroy the device if limited to ±1mA.

Dissipation ratings assume device is mounted with all leads soldered to printed circuit board.

DS21476B-page 4

© 2002 Microchip Technology Inc.

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