Open-Drain Output Sub-Microamp Comparators

2002 Microchip Technology Inc.

DS21714B-page 1

MCP6546/7/8/9

Features

· Low Quiescent Current: 600 nA/comparator (typ.)
· Rail-to-Rail Input: V

-0.3V to V

+0.3V

· Open-Drain Output: V

OUT

10V

· Propagation Delay 4 µs (typ)
· Wide Supply Voltage Range: 1.6V to 5.5V
· Single available in SOT-23-5, SC-70-5 packages
· Available in Single, Dual and Quad
· Chip Select (CS) with MCP6548
· Low Switching Current
· Internal Hysteresis: 3.3 mV (typ)

Typical Applications

· Laptop Computers
· Mobile Phones
· Metering Systems
· Hand-held Electronics
· RC Timers
· Alarm and Monitoring Circuits
· Windowed Comparators
· Multi-vibrators

Related Devices

· CMOS/TTL Compatible Output: MCP6541/2/3/4

Typical Application Circuit

Description

The Microchip Technology, Inc. MCP6546/7/8/9 family
of comparators is offered in single (MCP6546), single
with chip select (MCP6548), dual (MCP6547) and quad
(MCP6549) configurations. The outputs are open-drain
and are capable of driving heavy DC or capacitive
loads.

These comparators are optimized for low power, sin-
gle-supply operation with greater than rail-to-rail input
operation. The output limits supply current surges and
dynamic power consumption while switching. The
open-drain output of the MCP6546/7/8/9 family, with a
pull-up resistor, can be used as a level-shifter for any
desired voltage up to 10V, and in wired-OR logic. Input
hysteresis eliminates output switching due to internal
noise voltage, reducing current draw. These compara-
tors operate with a single-supply voltage as low as 1.6V
and draw less than 1 µA/comparator of quiescent
current.

The related MCP6541/2/3/4 family of comparators from
Microchip has a push-pull output that supports rail-to-
rail output swing and interfaces with CMOS/TTL logic.

Package Types

MCP654X

Windowed Comparator

OUT

+IN

-IN

MCP6546

OUT

PDIP, SOIC, MSOP

SOT-23-5, SC-70-5

OUT

+IN

-IN

MCP6546

MCP6547

+INA

-INA

OUTA

+ -

OUTB

-INB

+INB

+IN

-IN

MCP6548

OUT

PDIP, SOIC, MSOP

MCP6549

+INA

-INA

OUTA

+ -

OUTD

-IND

+IND

OUTB

-INB

+INB

+INC

-INC

OUTC

PDIP, SOIC, TSSOP

Open-Drain Output Sub-Microamp Comparators

MCP6546/7/8/9

DS21714B-page 2

2002 Microchip Technology Inc.

1.0

ELECTRICAL
CHARACTERISTICS

1.1

Absolute Maximum Ratings

- V

..............................................................7.0V

Open-Drain output..................................... V

+10.5V

All inputs and outputs ........... V

0.3V to V

+0.3V

Difference Input voltage ............................ |V

- V

Output Short-Circuit Current .......................continuous
Current at Input Pins .........................................±2 mA
Current at Output and Supply Pins ..................±30 mA
Storage temperature ..........................-65°C to +150°C
Junction Temperature....................................... +150°C
ESD protection on all pins (HBM); (MM) .....4 kV; 200V

Notice: Stresses above those listed under "Maximum Rat-
ings" may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.

PIN FUNCTION TABLE

DC CHARACTERISTICS

NAME

FUNCTION

+IN/+INA/+INB/+INC/+IND

Non-inverting Inputs

-IN/-INA/-INB/-INC/-IND

Inverting Inputs

Positive Power Supply

Negative Power Supply

OUT/OUTA/OUTB/OUTC/OUTD Outputs
CS

Chip Select

Not Connected

Electrical Specifications: Unless otherwise indicated, V

= +1.6V to +5.5V, V

= GND, T

= 25°C, V

IN+

= V

/2, V

IN-

= V

= 2.74 k

to V

= V

. Refer to Figure 1-3.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Power Supply
Supply Voltage

1.6

5.5

Quiescent Current per comparator

0.3

0.6

µA

OUT

= 0

Input
Input Voltage Range

CMR

-0.3

+0.3

Common Mode Rejection Ratio

CMRR

= 5V, V

= -0.3V to 5.3V

Common Mode Rejection Ratio

CMRR

= 5V, V

= 2.5V to 5.3V

Common Mode Rejection Ratio

CMRR

= 5V, V

= -0.3V to 2.5V

Power Supply Rejection Ratio

PSRR

= V

Input Offset Voltage

-7.0

±1.5

+7.0

= V

(Note 1)

Drift with Temperature

±3

µV/°C T

= -40°C to +85°C, V

= V

Input Hysteresis Voltage

HYST

1.5

3.3

6.5

= V

(Note 1)

Drift with Temperature

HYST

µV/°C T

= -40°C to +25°C, V

= V

Drift with Temperature

HYST

µV/°C T

= +25°C to +85°C, V

= V

Input Bias Current

Over Temperature

100

= -40°C to +85°C, V

= V

(Note 3)

Input Offset Current

±1

Common Mode Input Impedance

||4

||pF

Differential Input Impedance

DIFF

||2

||pF

Open-Drain Output
Output Pull-Up Voltage

(Note 2)

High-Level Output Current

-100

= 1.6V to 5.5V, V

= 10V (Note 2)

Low-Level Output Voltage

+0.2

OUT

= 2 mA, V

= V

= 5V

Short-Circuit Current

±50

= V

= 5.0V (Note 2)

Output Pin Capacitance

OUT

Note 1: The input offset voltage is the center of the input-referred trip points. The input hysteresis is the difference between the

input-referred trip points.

2: Do not short the output about V

+10V. Limit the output current to Absolute Maximum Rating of 30 mA. The comparator

does not function properly when V

< V

3: Input bias current over temperature is not tested for the SC-70-5 package.

2002 Microchip Technology Inc.

DS21714B-page 3

MCP6546/7/8/9

AC CHARACTERISTICS

SPECIFICATIONS FOR MCP6548 CHIP SELECT

FIGURE 1-1:

Timing Diagram for the CS

pin on the MCP6548.

FIGURE 1-2:

Propagation Delay Timing

Diagram.

Electrical Specifications: Unless otherwise indicated, V

= +1.6V to +5.5V, V

= GND, T

= 25°C, V

IN+

= V

/2, Step = 200 mV,

Overdrive = 100 mV, R

= 2.74 k

to V

= V

, and C

= 36 pF. Refer to Figure 1-2 and Figure 1-3.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Fall Time

0.7

µs

(Note 1)

Propagation Delay (High-to-Low)

PHL

4.0

8.0

µs

Propagation Delay (Low-to-High)

PLH

3.0

8.0

µs

(Note 1)

Propagation Delay Skew

PDS

-1.0

µs

(Notes 1 and 2)

Maximum Toggle Frequency

MAX

225

kHz

= 1.6V

MAX

165

kHz

= 5.5V

Input Noise Voltage

200

µV

P-P

10 Hz to 100 kHz

Note 1: t

and t

PLH

depend on the load (R

and C

); these specifications are valid for the indicated load only.

2: Propagation Delay Skew is defined as: t

PDS

= t

PLH

- t

PHL

Electrical Specifications: Unless otherwise indicated, V

= +1.6V to +5.5V, V

= GND, T

= 25°C, V

IN+

= V

/2, V

IN-

= V

= 2.74 k

to V

= V

, and C

= 36 pF. Refer to Figure 1-3.

Parameters

Sym

Min

Typ

Max

Units

Conditions

CS Low Specifications

CS Logic Threshold, Low

0.2V

CS Input Current, Low

CSL

CS = V

CS High Specifications

CS Logic Threshold, High

0.8V

CS Input Current, High

CSH

CS = V

CS Input High, V

Current

CS = V

CS Input High, GND Current

-20

CS = V

Comparator Output Leakage

O(LEAK)

OUT

= V

+10V

CS Dynamic Specifications

CS Low to Comparator Output Low
Turn-on Time

CS = 0.2V

to V

OUT

= V

/2,

IN-

= V

CS High to Comparator Output
High Z Turn-off Time

OFF

µs

CS = 0.8V

to V

OUT

= V

/2,

IN-

= V

CS Hysteresis

CS_HYST

0.6

= 5V

Hi-Z

OFF

OUT

-20 pA, typ.

Hi-Z

1 pA, typ.

-20 pA, typ.

-0.6 µA, typ.

PLH

OUT

IN-

100 mV

PHL

IN+

MCP6546/7/8/9

DS21714B-page 4

2002 Microchip Technology Inc.

TEMPERATURE SPECIFICATIONS

FIGURE 1-3:

DC Test circuit for the open-

drain output comparators.

Electrical Specifications: Unless otherwise indicated, V

= +1.6V to +5.5V and V

= GND.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Temperature Ranges

Specified Temperature Range

-40

+85

°C

Operating Temperature Range

-40

+125

°C

Note

Storage Temperature Range

-65

+150

°C

Thermal Package Resistances

Thermal Resistance, 5L-SC-70

331

°C/W

Thermal Resistance, 5L-SOT-23

256

°C/W

Thermal Resistance, 8L-PDIP

°C/W

Thermal Resistance, 8L-SOIC

163

°C/W

Thermal Resistance, 8L-MSOP

206

°C/W

Thermal Resistance, 14L-PDIP

°C/W

Thermal Resistance, 14L-SOIC

120

°C/W

Thermal Resistance, 14L-TSSOP

100

°C/W

Note:

The MCP6546/7/8/9 operates over this extended temperature range, but with reduced performance. In any
case, the Junction Temperature (T

) must not exceed the Absolute Maximum specification of +150°C.

= 0V

200 k

2.74 k

100 k

OUT

= V

36 pF

MCP654X

= V

2002 Microchip Technology Inc.

DS21714B-page 5

MCP6546/7/8/9

2.0

TYPICAL PERFORMANCE CURVES

Note: Unless otherwise indicated, V

= +5.0V, V

= GND, T

= 25°C, V

IN+

= V

/2, V

IN-

= GND, R

= 2.74 k

= V

, and C

= 36 pF.

FIGURE 2-1:

Histogram of Input Offset

Voltage with V

= V

FIGURE 2-2:

Histogram of Input Offset

Voltage Drift with V

= V

FIGURE 2-3:

Input Offset Voltage vs.

Ambient Temperature vs. Power Supply Voltage
with V

= V

FIGURE 2-4:

Histogram of Input

Hysteresis Voltage with V

= V

FIGURE 2-5:

Histogram of Input

Hysteresis Voltage Drift with Temperature =
-40°C to 25°C and 25°C to 85°C, V

= V

FIGURE 2-6:

Input Hysteresis Voltage vs.

Ambient Temperature vs. Power Supply Voltage
with V

= V

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.

10%

11%

12%

13%

14%

-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7

Input Offset Voltage (mV)

Percentage of Occurrences

1200 Samples
V

= V

10%

11%

12%

13%

14%

15%

-14 -11

-8

-5

-2

Input Offset Voltage Drift (µV/°C)

Percentage of Occurrences

1200 Samples
V

= V

-500

-400

-300

-200

-100

100

200

300

400

500

-40

-20

Ambient Temperature (°C)

Input Offset Voltage (µV)

= 1.6V

= 5.5V

= V

10%

12%

14%

16%

18%

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)

Percentage of Occurrences

1200 Samples
V

= V

10%

12%

14%

16%

18%

20%

22%

24%

26%

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Input Hysteresis Voltage Drift (µV/°C)

Percentage of Occurrences

1200 Samples
V

= V

= -40°C to 25°C

= 25°C to 85°C

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

-40

-20

Ambient Temperature (°C)

Input Hysteresis Voltage (mV)

= 1.6V

= 5.5V

= V

Document Outline

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Document Outline

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: MCP6548-I/P