AS1976-T austriamicrosystems, AS1976-T Datasheet - Page 11

• Manufacturer Part Number: AS1976-T
• Description: IC COMPARATOR PUSH/PULL SOT23-5
• Manufacturer: austriamicrosystems

Specifications of AS1976-T

• Comparator Type: General Purpose
• No. Of Comparators: 1
• Response Time: 15µs
• Ic Output Type: Push Pull
• Supply Current: 200nA
• Supply Voltage Range: 1.8V To 5.5V
• Amplifier Case Style: SOT-23
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS1976/AS1977
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
9 Application Information
The AS1976/AS1977 comparators are perfect for use with all 2-cell battery-powered applications.
typical application for the AS1977.
Figure 25. AS1977 Typical Application Circuit
Internal Hysteresis
The comparators were designed with 3mV of internal hysteresis to neutralize the effects of parasitic feedback, i.e., to
prevent unwanted rapid changes between the two output states.
The internal hysteresis in the AS1976/AS1977 creates two trip points:
The area between the trip points is the hysteresis band (V
ages are equivalent, the hysteresis effectively causes one input to move quickly past the other, thus taking the input
out of the region where oscillation occurs. In
Note: If the inputs are reversed the output will be inverted.
Figure 26. Threshold Hysteresis Band
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Rising Input Voltage (V
Falling Input Voltage (V
V
V
OUT
IN+
THR
THF
IN-
THR
THF
) – The comparator switches its output from low to high as V
) – The comparator switches its output from high to low as V
V
HB
V
IN
Figure 26
IN+
IN-
4
3
Revision 1.01
AS1977
IN- has a fixed voltage applied and IN+ is varied.
Thresholds
HB
Hysteresis
)
Band
(see Figure
5
V
1
OUT
2
V
CC
EE
26). When the AS1976/AS1977 input volt-
R
PULLUP
IN
IN
rises above this trip point.
falls below this trip point.
Figure 25
shows a
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