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PDF MCP6543T Data sheet ( Hoja de datos )
| Número de pieza | MCP6543T | |
| Descripción | Push-Pull Output Sub-Microamp Comparators | |
| Fabricantes | Microchip Technology | |
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M
MCP6541/2/3/4
Push-Pull Output Sub-Microamp Comparators
Features
• Low Quiescent Current: 600 nA/comparator (typ.)
• Rail-to-Rail Input: VSS - 0.3V to VDD + 0.3V
• CMOS/TTL-Compatible Output
• Propagation Delay 4 µs (typ.)
• Wide Supply Voltage Range: 1.6V to 5.5V
• Available in Single, Dual and Quad
• Single available in SOT-23-5, SC-70-5 packages
• Chip Select (CS) with MCP6543
• Low Switching Current
• Internal Hysteresis: 3.3 mV (typ.)
• Industrial Temperature: -40°C to +85°C
Typical Applications
• Laptop Computers
• Mobile Phones
• Metering Systems
• Hand-held Electronics
• RC Timers
• Alarm and Monitoring Circuits
• Windowed Comparators
• Multi-vibrators
Related Devices
• Open-Drain Output: MCP6546/7/8/9
Description
The Microchip Technology Inc. MCP6541/2/3/4 family
of comparators is offered in single (MCP6541), single
with chip select (MCP6543), dual (MCP6542) and quad
(MCP6544) configurations. The outputs are push-pull
(CMOS/TTL-compatible) and are capable of driving
heavy DC or capacitive loads.
These comparators are optimized for low power, single-
supply operation with greater than rail-to-rail input
operation. The push-pull output of the MCP6541/2/3/4
family supports rail-to-rail output swing and interfaces
with TTL/CMOS logic. The internal input hysteresis
eliminates output switching due to internal input noise
voltage, reducing current draw. The output limits supply
current surges and dynamic power consumption while
switching. This product family operates with a single-
supply voltage as low as 1.6V and draws less than 1 µA/
comparator of quiescent current.
The related MCP6546/7/8/9 family of comparators from
Microchip has an open-drain output. Used with a pull-up
resistor, these devices can be used as level-shifters for
any desired voltage up to 10V and in wired-OR logic.
Package Types
MCP6541
PDIP, SOIC, MSOP
NC 1
VIN– 2
VIN+ 3
VSS 4
-
+
8 NC
7 VDD
6 OUT
5 NC
MCP6541
SOT-23-5, SC-70-5
OUT 1
VSS 2
VIN+ 3
5 VDD
4 VIN–
MCP6541-R
SOT-23-5
OUT 1
VDD 2
VIN+ 3
5 VSS
4 VIN–
MCP6542
PDIP, SOIC, MSOP
OUTA 1
VINA– 2
VINA+ 3
VSS 4
-+
+-
8 VDD
7 OUTB
6 VINB–
5 VINB+
MCP6543
PDIP, SOIC, MSOP
NC 1
VIN– 2
VIN+ 3
VSS 4
-
+
8 CS
7 VDD
6 OUT
5 NC
MCP6544
PDIP, SOIC, TSSOP
OUTA 1
VINA– 2
VINA+ 3
VDD 4
VINB+ 5
VINB– 6
OUTB 7
14 OUTD
- + + - 13 VIND–
12 VIND+
11 VSS
10 VINC+
- + + - 9 VINC–
8 OUTC
2003 Microchip Technology Inc.
DS21696C-page 1
1 page  
MCP6541/2/3/4
2.0 TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, VDD = +1.6V to +5.5V, VSS = GND, TA = +25°C, VIN+ = VDD/2, VIN– = GND,
RL = 100 kΩ to VDD/2, and CL = 36 pF.
14%
12%
10%
1200 Samples
VCM = VSS
8%
6%
4%
2%
0%
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7
Input Offset Voltage (mV)
FIGURE 2-1:
Input Offset Voltage
Histogram at VCM = VSS.
18%
16%
14%
1200 Samples
VCM = VSS
12%
10%
8%
6%
4%
2%
0%
1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8 5.2 5.6 6.0
Input Hysteresis Voltage (mV)
FIGURE 2-4:
Input Hysteresis Voltage
Histogram at VCM = VSS.
16%
14%
12%
1200 Samples
VCM = VSS
10%
8%
6%
4%
2%
0%
-14 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14
Input Offset Voltage Drift (µV/°C)
FIGURE 2-2:
Input Offset Voltage Drift
Histogram at VCM = VSS.
26%
24%
22%
20%
18%
16%
14%
12%
10%
8%
6%
4%
2%
0%
1200 Samples
VCM = VSS
TA = +25°C to +85°C
TA = -40°C to +25°C
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Input Hysteresis Voltage Drift (µV/°C)
FIGURE 2-5:
Drift Histogram.
Input Hysteresis Voltage
500
400 VCM = VSS
300
200
VDD = 1.6V
100
0
-100
-200
-300
VDD = 5.5V
-400
-500
-40 -20
0
20 40 60
Ambient Temperature (°C)
80
FIGURE 2-3:
Input Offset Voltage vs.
Ambient Temperature at VCM = VSS.
6.0
5.5 VCM = VSS
5.0
4.5
4.0 VDD = 1.6V
3.5
3.0 VDD = 5.5V
2.5
2.0
1.5
-40
-20 0 20 40 60
Ambient Temperature (°C)
80
FIGURE 2-6:
Input Hysteresis Voltage vs.
Ambient Temperature at VCM = VSS.
2003 Microchip Technology Inc.
DS21696C-page 5
5 Page 
3.0 APPLICATIONS INFORMATION
The MCP6541/2/3/4 family of push-pull output compar-
ators are fabricated on Microchip’s state-of-the-art
CMOS process. They are suitable for a wide range of
applications requiring very low power consumption.
3.1 Comparator Inputs
The MCP6541/2/3/4 comparator family uses CMOS
transistors at the input. They are designed to prevent
phase inversion when the input pins exceed the supply
voltages. Figure 2-31 shows an input voltage
exceeding both supplies with no resulting phase
inversion.
The input stage of this family of devices uses two
differential input stages in parallel: one operates at low
input voltages and the other at high input voltages. With
this topology, the input voltage is 0.3V above VDD and
0.3V below VSS. Therefore, the input offset voltage is
measured at both VSS - 0.3V and VDD + 0.3V to ensure
proper operation.
The maximum operating input voltages that can be
applied are VSS - 0.3V and VDD + 0.3V. Voltages on the
inputs that exceed this absolute maximum rating can
cause excessive current to flow and permanently
damage the device. In applications where the input pin
exceeds the specified range, external resistors can be
used to limit the current below ±2 mA, as shown in
Figure 3-1.
RIN MCP654X
VIN
VOUT
RIN ≥ (---M-----a---x---i-m-----u---m-----e---x---p-2--e--c-m--t--e-A-d-----V----I---N----)---–-----V----D-----D--
RIN ≥ V----S----S----–-----(--M-----i--n---i--m--2--u---mm-----A-e--x---p---e---c--t--e---d-----V---I---N-----)
FIGURE 3-1:
An input resistor (RIN)
should be used to limit excessive input current if
either of the inputs exceeds the Absolute
Maximum specification.
3.2 Push-Pull Output
The push-pull output is designed to be compatible with
CMOS and TTL logic, while the output transistors are
configured to give rail-to-rail output performance. They
are driven with circuitry that minimizes any switching
current (shoot-through current from supply-to-supply)
when the output is transitioned from high-to-low, or from
low-to-high (see Figures 2-15, 2-17, 2-32 through 2-36
for more information).
MCP6541/2/3/4
3.3 MCP6543 Chip Select (CS)
The MCP6543 is a single comparator with chip select
(CS). When CS is pulled high, the total current
consumption drops to 20 pA (typ); 1 pA (typ) flows
through the CS pin, 1 pA (typ) flows through the output
pin and 18 pA (typ) flows through the VDD pin, as
shown in Figure 1-1. When this happens, the
comparator output is put into a high-impedance state.
By pulling CS low, the comparator is enabled. If the CS
pin is left floating, the comparator will not operate
properly. Figure 1-1 shows the output voltage and
supply current response to a CS pulse.
The internal CS circuitry is designed to minimize
glitches when cycling the CS pin. This helps conserve
power, which is especially important in battery-
powered applications.
3.4 Externally-Set Hysteresis
Greater flexibility in selecting hysteresis (or input trip
points) is achieved by using external resistors.
Input offset voltage (VOS) is the center (average) of the
(input-referred) low-high and high-low trip points. Input
hysteresis voltage (VHYST) is the difference between
the same trip points. Hysteresis reduces output
chattering when one input is slowly moving past the
other and thus reduces dynamic supply current. It also
helps in systems where it is best not to cycle between
states too frequently (e.g., air conditioner thermostatic
control). The MCP6541/2/3/4 family has internally-set
hysteresis that is small enough to maintain input offset
accuracy (<7 mV) and large enough to eliminate output
chattering caused by the comparator’s own input noise
voltage (200 µVp-p).
9
8
7
VDD = 5.0V
VIN+ = +2.75V
30
25
20
6 VOUT
5
15
10
45
3
Hysteresis
0
2 -5
1 -10
0 -15
-1 VIN–
-20
-2 -25
-3 0
-30
100 200 300 400 500 600 700 800 900 1000
Time (100 ms/div)
FIGURE 3-2:
The MCP6541/2/3/4
comparators’ internal hysteresis eliminates
output chatter caused by input noise voltage.
2003 Microchip Technology Inc.
DS21696C-page 11
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet MCP6543T.PDF ] | |
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