TC1041 Datasheet PDF - Microchip Technology
| Part Number | TC1041 | |
| Description | Dual Low Power Comparator and Voltage Reference | |
| Manufacturers | Microchip Technology | |
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TC1041
Linear Building Block – Dual Low Power Comparator and
Voltage Reference with Programmable Hysteresis
Features
• Combines Two Comparators and a Voltage
Reference in a Single Package
• Optimized for Single Supply Operation
• Available in Two Small Packages: 8-Pin SOIC or
8-Pin MSOP
• Ultra Low Input Bias Current: Less than 100pA
• Low Quiescent Current, Operating: 10µA (Typ.)
• Rail-to-Rail Inputs and Outputs
• Operates Down to VDD = 1.8V
• Programmable Hysteresis
Applications
• Power Supply Circuits
• Battery Operated Equipment
• Consumer Products
• Replacements for Discrete Components
Device Selection Table
Part Number
Package
TC1041CEOA
TC1041CEUA
8-Pin SOIC
8-Pin MSOP
Temperature
Range
-40°C to +85°C
-40°C to +85°C
Package Types
8-Pin SOIC
8-Pin MSOP
OUTA 1
VSS 2
INA+ 3
INB- 4
8 OUTB
7 VDD
TC1041CEOA
TC1041CEUA 6 REF
5 HYST
General Description
The TC1041 is a mixed-function device combining two
comparators and a voltage reference in a single 8-pin
package. The inverting inputs of both comparators are
internally connected to the reference.
This increased integration allows the user to replace
two packages, which saves space, lowers supply
current and increases system performance. The
TC1041 operates from two 1.5V alkaline cells down to
VDD = 1.8V. It requires only 10µA typical supply current
which significantly extends battery life. The TC1041
provides a simple method for adding user-adjustable
hysteresis without feedback or complex external
circuitry. Hysteresis is adjusted with a simple resistor
divider on the HYST pin.
Rail-to-rail inputs and outputs allow operation from low
supply voltages with large input and output signal
swings.
Packaged in an 8-Pin SOIC or 8-Pin MSOP, the
TC1041 is ideal for applications requiring low power
and small packages.
Functional Block Diagram
OUTA 1
TC1041
8
OUTB
VSS 2
INA+ 3
INB+ 4
AB
––
Voltage
Reference
VSS
7 VDD
6
REF
5
HYST
© 2002 Microchip Technology Inc.
DS21346B-page 1
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TC1041
4.0 TYPICAL APPLICATIONS
The TC1041 lends itself to a wide variety of
applications, particularly in battery powered systems. It
typically finds application in power management,
processor supervisory and interface circuitry.
4.1 Precision Battery Monitor
Figure 4-1 is a precision battery low/battery dead
monitoring circuit. Typically, the battery low output
warns the user that a battery dead condition is
imminent. Battery dead typically initiates a forced
shutdown to prevent operation at low internal supply
voltages (which can cause unstable system operation).
The circuit in Figure 4-1 uses a TC1034, a TC1041 and
only six external resistors. AMP 1 is a simple buffer
while CMPTR1 and CMPTR2 provide precision voltage
detection using VREF as a reference. Resistors R2 and
R4 set the detection threshold for BATT LOW while
Resistors R1 and R3 set the detection threshold for
BATT FAIL. The component values shown assert
BATT LOW at 2.2V (typical) and BATT FAIL at 2.0V
(typical). Total current consumed by this circuit is
typically 16µA at 3V. Resistors R5 and R6 provide
hysteresis of 116mV for both comparators.
FIGURE 4-1:
PRECISION BATTERY MONITOR
To System DC/DC
Converter
R4, 470k, 1%
VDD
TC1034
+
AMP1
–
R2, 430k, 1%
VDD
+
CMPTR1
–
TC1041
BATTLOW
3V
Alkaline
+
TC1041
R1, 300k, 1%
VREF
VDD
– TC1041
CMPTR2
+
R5
HYST
R6
BATTFAIL
51k
1M
R3, 470k, 1%
© 2002 Microchip Technology Inc.
DS21346B-page 5
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for TC1041 electronic component. |
| Information | Total 14 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ TC1041.PDF Datasheet ] | |
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