TLC3702

DUAL MICROPOWER LinCMOS

™ VOLTAGE COMPARATORS

SLCS013D – NOVEMBER 1986 – REVISED NOVEMBER 1998

11

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

–

+

DUT

VDD

+

–

–

+

–

+

C2

1

µF

R4

47 k

Ω

R5

1.8 k

Ω 1%

C3

0.68

µF

IC1c

1/4 TLC274CN

IC1a

1/4 TLC274CN

IC1b

1/4 TLC274CN

R6

1 M

Ω

R7

1.8 k

Ω 1%

R8

10 k

Ω 1%

R1

240 k

Ω

R2

10 k

Ω

C1

0.1

µF

R3

100

Ω

C4

0.1

µF

Integrator

R9

100

Ω 1%

Buffer

Triangle

Generator

VIO

(X100)

Figure 6. Circuit for Input Offset Voltage Measurement

Response time is defined as the interval between the application of an input step function and the instant when

the output reaches 50% of its maximum value. Response time for the low-to-high-level output is measured from

the leading edge of the input pulse, while response time for the high-to-low-level output is measured from the

trailing edge of the input pulse. Response time measurement at low input signal levels can be greatly affected

by the input offset voltage. The offset voltage should be balanced by the adjustment at the inverting input as

shown in Figure 7, so that the circuit is just at the transition point. A low signal, for example 105-mV or 5-mV

overdrive, causes the output to change state.