TLC139, TLC339, TLC339Q

LinCMOS MICROPOWER QUAD COMPARATORS

7

WWW.TI.COM

PARAMETER

TEST CONDITIONS

TLC139M, TLC339C

TLC339I, TLC339M

TLC339Q

UNIT

MIN

TYP

MAX

Overdrive = 2 mV

4.5

f = 10 kHz,

Overdrive = 5 mV

2.5

tPLH

Propagation delay time, low-to-high output

f = 10 kHz,

CL = 15 pF

Overdrive = 10 mV

1.7

s

tPLH

Propagation delay time, low-to-high output

CL = 15 pF

Overdrive = 20 mV

1.2

µs

Overdrive = 40 mV

1.0

VI = 1.4 V step at IN+

1.1

Overdrive = 2 mV

3.6

f = 10 kHz,

Overdrive = 5 mV

2.1

tPHL

Propagation delay time, high-to-low level output

f = 10 kHz,

CL = 15 pF

Overdrive = 10 mV

1.3

s

tPHL

Propagation delay time, high-to-low level output

CL = 15 pF

Overdrive = 20 mV

0.85

µs

Overdrive = 40 mV

0.55

VI = 1.4 V step at IN+

0.10

tTHL

Transition time, high-to-low level output

f = 10 kHz,

Overdrive = 50 mV

20

ns

tTHL

Transition time, high-to-low level output

f = 10 kHz,

CL = 15pF

Overdrive = 50 mV

20

ns

PARAMETER MEASUREMENT INFORMATION

The TLC139 and TLC339 contain a digital output stage that, if held in the linear region of the transfer curve, can cause

damage to the device. Conventional operational amplifier/comparator testing incorporates the use of a servo-loop

that is designed to force the device output to a level within this linear region. Since the servo-loop method of testing

cannot be used, the following alternatives for testing parameters such as input offset voltage, common-mode

rejection, etc., are suggested.

To verify that the input offset voltage falls within the limits specified, the limit value is applied to the input as shown

in Figure 1(a). With the noninverting input positive with respect to the inverting input, the output should be high. With

the input polarity reversed, the output should be low.

A similar test can be made to verify the input offset voltage at the common-mode extremes. The supply voltages can

accuracy.

(a) VIO WITH VIC = 0 V

(b) VIO WITH VIC = 4 V

5 V

1 V

5.1 k

Ω

5.1 k

Ω

Applied VIO

Limit

Applied VIO

Limit

VO

VO

−4 V

Figure 1. Method for Verifying That Input Offset Voltage Is Within Specified Limits