TC1041CEUA Microchip Technology, TC1041CEUA Datasheet - Page 5

• Manufacturer Part Number: TC1041CEUA
• Description: IC DUAL COMPARATOR W/VREF 8MSOP
• Manufacturer: Microchip Technology
• Type: with Voltage Referencer

Specifications of TC1041CEUA

• Output Type: Rail-to-Rail
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Number Of Elements: 2
• Voltage - Supply: 1.8 V ~ 5.5 V
• Mounting Type: Surface Mount
• Number Of Channels: 2 Channels
• Product: Analog Comparators
• Response Time: 4 us
• Offset Voltage (max): 5 mV
• Input Bias Current (max): 100 pA
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Supply Current (max): 15 uA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.0
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
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).
FIGURE 4-1:
©
2002 Microchip Technology Inc.
Alkaline
3V
TYPICAL APPLICATIONS
Precision Battery Monitor
+
TC1034
TC1041
PRECISION BATTERY MONITOR
+
–
AMP1
V
DD
To System DC/DC
Converter
R1, 300k, 1%
R2, 430k, 1%
V
REF
R4, 470k, 1%
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 V
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.
CMPTR1
+
–
V
DD
TC1041
R3, 470k, 1%
CMPTR2
–
+
V
DD
TC1041
REF
as a reference. Resistors R2 and
BATTLOW
BATTFAIL
HYST
TC1041
DS21346B-page 5
R5
R6
51k
1M