Datasheet

+V
+5 V
CC
R
LOAD
V
O
R2
1 MW
V
REF
+2.5 V
V
A
5 V
0 V
1.675 V 3.325 V
V
IN2
V
IN
V
O
High
+V
CC
V = V
A REF
R2
R1
330 kW
V
IN
R1
V
O
Low
V
IN1
V = V
A REF
R1
R2
V
O
V
IN1
V
IN2
DV = V
IN CC
´
R1
R2
V =
IN2
V
REF CC
(R1 + R2) V R1- ´
R2
V = R1
IN1
´
V
REF
R2
´ V
REF
TLV3201
TLV3202
www.ti.com SBOS561A –MARCH 2012–REVISED JUNE 2012
Noninverting Comparator with Hysteresis
A noninverting comparator with hysteresis requires a two-resistor network, as shown in Figure 29, and a voltage
reference (V
REF
) at the inverting input. When V
IN
is low, the output is also low. For the output to switch from low
to high, V
IN
must rise up to V
IN1
. V
IN1
is calculated by Equation 4:
(4)
When V
IN
is high, the output is also high. In order for the comparator to switch back to a low state, V
IN
must
equal V
REF
before V
A
is again equal to V
REF
. V
IN
can be calculated by Equation 5:
(5)
The hysteresis of this circuit is the difference between V
IN1
and V
IN2
, as defined by Equation 6.
(6)
Figure 29. TLV3201 in Noninverting Configuration with Hysteresis
CAPACITIVE LOADS
The TLV3201 and TLV3202 feature a push-pull output. When the output switches, there is a direct path between
V
CC
and ground, causing increased output sinking or sourcing current during the transition. Following the
transition the output current decreases and supply current returns to 40 µA, thus maintaining low power
consumption. Under reasonable capacitive loads, the TLV3201 and TLV3202 maintain specified propagation
delay (see the Typical Characteristics), but excessive capacitive loading under high switching frequencies may
increase supply current, propagation delay, or induce decreased slew rate.
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