TC1031CEUA Microchip Technology, TC1031CEUA Datasheet - Page 5

IC VREF SGL SPLY COMP SD 8MSOP

TC1031CEUA

Manufacturer Part Number
TC1031CEUA
Description
IC VREF SGL SPLY COMP SD 8MSOP
Manufacturer
Microchip Technology
Type
with Voltage Referencer
Datasheets

Specifications of TC1031CEUA

Output Type
Rail-to-Rail
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Number Of Elements
1
Voltage - Supply
1.8 V ~ 5.5 V, ±0.9 V ~ 2.75 V
Mounting Type
Surface Mount
Number Of Channels
1 Channel
Product
Analog Comparators
Response Time
6 us
Offset Voltage (max)
5 mV
Input Bias Current (max)
0.0001 uA
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.8 V
Supply Current (max)
0.006 mA
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Request inventory verification / Request inventory verification
3.0
The TC1031 is one of a series of very low-power, linear
building block products targeted at low-voltage, single-
supply applications. Minimum operating voltage for the
device is 1.8V, and typical supply current is only 6μA
(fully enabled). It combines one comparator and a
voltage reference in a single package. The comparator
and reference outputs are in a high-impedance state
during shutdown.
3.1
The TC1031 contains one comparator with program-
mable hysteresis. The range of the inputs extends
beyond both supply voltages by 200mV. The compara-
tor outputs will swing to within several millivolts of the
supplies depending on the load current being driven.
The comparator exhibits a propagation delay and
supply current which is largely independent of supply
voltage. The low input bias current and offset voltage
make it suitable for high impedance precision
applications.
The comparator is disabled during shutdown and has
high-impedance output.
3.2
A 2.0% tolerance, internally biased, 1.20V bandgap
voltage reference is included in the TC1031. It has a
push-pull output capable of sourcing and sinking at
least 50μA. The voltage reference is disabled during
shutdown, with a high-impedance output.
FIGURE 3-1:
© 2005 Microchip Technology Inc.
DETAILED DESCRIPTION
Comparator
Voltage Reference
TC1031 PROGRAMMABLE HYSTERESIS
I
Note: Size R1 and R2 such that I
REF
R1
R2
6
5
1
V
V
HYST
REF
SS
REF
≤ 50µA
TC1031
3.3
SHDN at V
reference and reduces the supply current to less than
0.1μA. The SHDN input cannot be allowed to float;
when not used, connect it to V
high impedance state when the TC1031 is disabled.
The comparator’s inputs and output can be driven from
rail-to-rail by an external voltage when the TC1031 is
disabled. No latchup will occur when the device is
driven to its enabled state when SHDN is set to V
3.4
Hysteresis is added to the comparators by connecting
a resistor R1 between the V
another resistor R2 between the HYST pin and V
For no hysteresis V
HYST. The hysteresis, V
voltage difference between the V
where:
and is symmetrical around the normal (without
hysterersis)
maximum voltage allowed between the V
pins is 80mV, giving a maximum hysteresis of 160mV.
V
HB
= 2 * V
Shutdown Input
Programmable Hysteresis
R1 =
R2 =
IL
disables both the comparator and voltage
threshold
REF
(
(2) (I
1.200V –
V
* R1/(R1 + R2) (See Figure 3-1)
HB
REF
REF
I
REF
)
should be directly connected to
V
of
HB
2
HB
, is equal to twice the
REF
)
DD
the
. The outputs are in a
REF
and HYST pins and
TC1031
comparator.
DS21342C-page 5
and HYST pins,
REF
and H
IH
The
YST
.
SS
.

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