TC7109/A

DS21456C-page 4

© 2006 Microchip Technology Inc.

1.0

ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

Positive Supply Voltage (GND to V+) ..................+6.2V

Negative Supply Voltage (GND to V-) .....................-9V

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

Reference Input Voltage:

(Low to High) (Note 1) ............................. V+ to V-

Digital Input Voltage:

(Pins 2-27) (Note 2) ...........................GND – 0.3V

CERDIP ......................................................2.29W

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

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

PQFP ..........................................................1.00W

Operating Temperature Range

Plastic Package (C) ......................... 0°C to +70°C

Ceramic Package (I) ..................... -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.

TC7109/TC7109A ELECTRICAL SPECIFICATIONS

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

Analog

Overload Recovery Time (TC7109A)

—

0

1

Measurement

Cycle

Zero Input Reading

Ratio Metric Reading

NL

Non-Linearity (Max Deviation

from Best Straight Line Fit)

-1

±0.2

+1

Count

Full Scale = 409.6mV to 2.048V

Over Full Operating

Temperature Range

Rollover Error (Difference in Reading for

Equal Positive and Inputs near

(Full Scale)

-1

±0.02

+1

Count

Full Scale = 409.6mV to

2.048V Over Full Operating

Temperature Range

CMRR

Input Common Mode

Rejection Ratio

—50

—

μV/V

Full Scale = 409.6mV

Common Mode Voltage Range

V- +1.5

—

V+ -1.5

V

Input High, Input Low and

Common Pins

Noise (P-P Value Not

Exceeded 95% of Time)

—15

—

Leakage Current at Input

—

1

10

pA

—

20

100

pA

C Device: 0°C

—

100

250

pA

I Device: -25°C

Zero Reading Drift

—

0.2

1

μV/°C

Note

1:

Input voltages may exceed supply voltages if input current is limited to ±100

μA.

2: Connecting any digital inputs or outputs to voltages greater than V+ or less than GND may cause destructive device

latch-up. Therefore, it is recommended that inputs from sources other than the same power supply should not be applied

to the TC7109A before its power supply is established. In multiple supply systems, the supply to the device should be

activated first.

3: This limit refers to that of the package and will not occur during normal operation.