TC7129(2002) View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC7129
(Rev.:2002)

4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers

Microchip Technology 

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

Supply Voltage (V+ to V-)....................................... 15V

Reference Voltage (REF HI or REF LO) ......... V+ to V-

Input Voltage (IN HI or IN LO) (Note 1)........... V+ to V-

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

Digital Input (Pins 1, 2, 19, 20,

21, 22, 27, 37, 39, 40) .......................... DGND to V+

Analog Input (Pins 25, 29, 30) ........................ V+ to V-

Package Power Dissipation (TA ≤ 70°C)

Plastic DIP ..................................................... 1.23W

PLCC ............................................................. 1.23W

Plastic QFP .................................................... 1.00W

Operating Temperature Range ............... 0°C to +70°C

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

TC7129

*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.

TC7129 ELECTRICAL SPECIFICATIONS

Electrical Characteristics: V+ to V- = 9V, VREF = 1V, TA = +25°C, fCLK = 120kHz, unless otherwise indicated.

Pin numbers refer to 40-pin DIP.

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

Input

Zero Input Reading

Zero Reading Drift

Ratiometric Reading

Range Change Accuracy

RE

NL

CMRR

CMVR

Rollover Error

Linearity Error

Common Mode Rejection Ratio

Common Mode Voltage Range

eN

Noise (Peak-to-Peak Value not

Exceeded 95% of Time)

IIN

Input Leakage Current

Scale Factor Temperature Coefficient

Power

-0000

—

9997

0.9999

—

—

—

—

—

—

—

—

0000

±0.5

9999

1.0000

+0000

—

10000

1.0001

1

2

1

—

110

—

(V-) + 1.5 —

(V+) – 1 —

14

—

1

10

2

7

Counts

µV/°C

Counts

Ratio

Counts

Counts

dB

V

V

µVP-P

pA

ppm/°C

VIN = 0V, 200mV Scale

VIN = 0V, 0°C < TA < +70°C

VIN = VREF = 1000mV, Range = 2V

VIN = 1V on High Range,

VIN = 0.1V on Low Range

VIN- = VIN+ = 199mV

200mV Scale

VCM = 1V, VIN = 0V, 200mV Scale

VIN = 0V

200mV Scale

VIN = 0V

200mV Scale

VIN = 0V, Pins 32, 33

VIN = 199mV, 0°C < TA < +70°C

External VREF = 0ppm/°C

VCOM

Common Voltage

Common Sink Current

2.8

3.2

3.5

V

V+ to Pin 28

—

0.6

—

mA ∆Common = +0.1V

Common Source Current

—

10

—

µA ∆Common = -0.1V

DGND Digital Ground Voltage

4.5

5.3

5.8

V

V+ to Pin 36, V+ to V- = 9V

Sink Current

—

1.2

—

mA ∆DGND = +0.5V

Supply Voltage Range

6

9

12

V

V+ to V-

IS

Supply Current Excluding Common

—

0.8

1.3

mA V+ to V- = 9V

Current

Note 1: Input voltages may exceed supply voltages, provided input current is limited to ±400µA. Currents 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.

© 2002 Microchip Technology Inc.

DS21459B-page 3

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