© 2002 Microchip Technology Inc.

DS21461B-page 5

TC7136/TC7136A

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

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

Analog Input Voltage (Either Input) (Note 1)... V+ to V-

Reference Input Voltage (Either Input)............ V+ to V-

Clock Input .................................................TEST to V+

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

Plastic Quad Flat Package .......................... 1.00W

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

Operating Temperature Range:

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

I Devices ........................................ -25°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.

TC7136 AND TC7136A ELECTRICAL SPECIFICATIONS

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

Input

Zero Input Reading

-000.0

±000.0

+000.0

Digital

Reading

Zero Reading Drift

—

0.2

1

µV/°C

Ratiometric Reading

999

999/1000

1000

Digital

Reading

NL

Non-Linearity Error

—

1

±0.2

Count

Full Scale = 20mV or 2V Max.

Deviation from best Straight Line

Rollover Error

-1

-1

±0.2

1 Count

Noise

—

15

—

Input Leakage Current

—

1

10

pA

CMRR

Common Mode Rejection Ratio

—

50

—

µV/V

Scale Factor Temperature

Coefficient

—1

5

ppm/°C

Ext. Ref. Temp. Coeff. = 0ppm/°C

Note

1:

Input voltages may exceed supply voltages when input current is limited to 100

µA.

2:

Dissipation rating assumes device is mounted with all leads soldered to PC board.

3:

Refer to "Differential Input" discussion.

4:

Backplane drive is in phase with segment drive for "OFF" segment and 180° out-of-phase for "ON" segment. Frequency

is 20 times conversion rate. Average DC component is less than 50mV.

5:

See "Typical Application".

6:

A 48kHz oscillator increases current by 20

µA (typical). Common current not included.