Maxim MAX9646EUK Low-power comparators with precision reference in 4-bump ucsp Datasheet

19-5803; Rev 0; 3/11
KIT
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Low-Power Comparators with Precision
Reference in 4-Bump UCSP
The MAX9644/MAX9645/MAX9646 are small, single comparators, ideal for a wide variety of portable electronics
applications such as cell phones, media players, and
notebooks that have extremely tight board space and
power constraints. These comparators are offered in both
a miniature 4-bump UCSP™ package with a 1mm x 1mm
footprint (as small as two 0402 resistors) and a
5-pin SOT23 package.
The ICs feature an input voltage range of -0.3V to
+5.5V, independent of supply voltage. These devices
maintain high impedance at the inputs even when powered down (VCC or VREF = 0V). They also feature internal filtering to provide high RF immunity.
The ICs have an internal 0.2V reference. These devices
feature either a push-pull or an open-drain output. They
consume only 700nA (max) supply current and operate
down to VCC = 1V over the extended -40°C to +85°C temperature range.
Features
o Tiny, 1mm x 1mm x 0.6mm 4-Bump UCSP
Footprint = Two 0402 Resistors
Also Available in a 5-Pin SOT23 Package
o Ultra-Low Operating Current (100nA max)
o -0.3V to +5.5V Input Voltage Range
o Internal 0.2V Reference Trimmed to 1% Accuracy
o 15µs Propagation Delay
o -40°C to +85°C Extended Temperature Range
Ordering Information
PART
PIN-PACKAGE
TOP MARK
4 UCSP
+AGL
MAX9644EUK+
5 SOT23
+AFJN
MAX9645EBS+G45
4 UCSP
+AGM
MAX9645EUK+
5 SOT23
+AFJO
Portable Media Players
MAX9646EBS+G45
4 UCSP
+AGN
Electronic Toys
MAX9646EUK+
5 SOT23
+AFJP
Notebook Computers
Note: All devices are specified over the extended -40°C to
+85°C operating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
G45 = Protective die coating.
Applications
Cell Phones
Portable Medical Devices
MAX9644EBS+G45
Selector Guide
PART
REFERENCE VOLTAGE (V)
INPUT
OUTPUT
MAX9644
0.2
Noninverting
Open drain
MAX9645
0.2
Inverting
Open drain
MAX9646
0.2
Noninverting
Push-pull
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
MAX9644/MAX9645/MAX9646
General Description
MAX9644/MAX9645/MAX9646
Low-Power Comparators with Precision
Reference in 4-Bump UCSP
ABSOLUTE MAXIMUM RATINGS
VCC, REF, IN to GND................................................-0.3V to +6V
OUT to GND (MAX9644/MAX9645)..........................-0.3V to +6V
OUT to GND (MAX9646 only) .................-0.3V to + (VCC + 0.3V)
Output Short-Circuit Current Duration ....................................10s
Input Current into Any Terminal........................................±20mA
Continuous Power Dissipation
4-Bump UCSP (derate 3.0mW/°C above +70°C) .......238 mW
5-Pin SOT23 (derate 3.9mW/°C above +70°C)...........312 mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Bump Temperature (soldering) Reflow............................+235°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = 3.3V, RPULLUP = 10kΩ to VPULLUP = 3.3V for MAX9644/MAX9645, TA = -40°C to +85°C. Typical values at TA = +25°C, unless
otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Input Voltage Range
VIN
Guaranteed by IIN test
+5.5
V
Input Bias Current
IIN
VIN = 0.2V to 5.5V (Note 2)
0.06
15
nA
VCC = 0, VIN = 5.5V (Note 2)
< 0.1
15
nA
Input Leakage Current
Output Voltage Low
IIN_SHDN
VOL
-0.3
ISINK = 50µA, VCC = 1.0V
0.03
0.2
ISINK = 200µA, VCC = 1.2V
0.08
0.20
ISINK = 500µA, VCC = 1.8V
0.13
0.23
ISINK = 0.75mA, VCC = 3.3V
0.14
0.3
ISINK = 1.2mA, VCC = 5.5V
0.19
0.5
VCC - 0.08V
VCC - 0.2V
ISOURCE = 40µA, VCC = 1.2V
VCC - 0.08V
VCC - 0.20V
ISOURCE = 180µA, VCC = 1.8V
VCC - 0.15V
VCC - 0.23V
ISOURCE = 0.3mA, VCC = 3.3V
VCC - 0.13V
VCC - 0.3V
ISOURCE = 0.75mA, VCC = 5.5V
VCC - 0.24V
VCC - 0.5V
< 0.1
15
ISOURCE = 15µA, VCC = 1.0V
Output Voltage High
(MAX9464 Only)
Output Leakage Current
(MAX9644/MAX9645 Only)
VOH
OUT = high, VPULLUP = 5.5V
IOUT_LEAKAGE
(Note 2)
V
V
nA
AC CHARACTERISTICS
Propagation Delay
VOVERDRIVE = ±100mV (Note 3)
15
µs
Fall Time
tPD
tF
CL = 10pF
14
ns
Rise Time
tR
CL = 10pF, MAX9646 only
30
ns
MAX964_EBS+
200
MAX964_EUK+
199
REFERENCE VOLTAGE
Input Threshold (Note 4)
Input Threshold Error
(Note 4)
Input Threshold Hysteresis
REF Tempco
Power-Supply Rejection
Ratio
2
VREF
Delta-VREF
VHYS
VREF_TEMPCO
PSRR
TA = +25°C
TA = -40°C to +85°C
-1
+1
-3.5
+3.5
TA = -40°C to +85°C (Note 5)
(Note 6)
VCC = 1.0V to 5.5V
mV
40
%
±0.9
mV
6
µV/°C
53
dB
_______________________________________________________________________________________
Low-Power Comparators with Precision
Reference in 4-Bump UCSP
(VCC = 3.3V, RPULLUP = 10kΩ to VPULLUP = 3.3V for MAX9644/MAX9645, TA = -40°C to +85°C. Typical values at TA = +25°C, unless
otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
5.5
V
POWER SUPPLY
Supply Voltage
VCC
Supply Current
ICC
Power-Up Time
tON
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Guaranteed by VOL/VOH tests
1.0
VCC = 1.0V
0.4
0.7
VCC = 5.5V
0.6
1.1
µA
3
ms
All devices are 100% production tested at TA = +25°C. Temperature limits are guaranteed by design.
Too small to be measured in an ATE test environment. Only gross test to catch failures is implemented.
Overdrive is defined as the voltage above or below the switching points.
Guaranteed by ATE and/or bench characterization over temperature. VREF is the average of the trip points.
Hysteresis is half the input voltage difference between the two switching points.
Includes reference error along with comparator offset voltage error.
Typical Operating Characteristics
(VCC = 3.3V, VREF = 1.8V, RPULLUP = 10kΩ to VPULLUP = 3.3V for MAX9644/MAX9645, GND = 0, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. OUTPUT TRANSITION FREQUENCY
+25°C
600
400
VCC = 5V
10
0.9
OUTPUT VOLTAGE LOW (V)
SUPPLY CURRENT (µA)
+85°C
1.0
MAX9644 toc02
800
SUPPLY CURRENT (nA)
100
MAX9644 toc01
1000
OUTPUT VOLTAGE LOW
vs. SINK CURRENT
VCC = 3.3V
VCC = 1.8V
200
MAX9644 toc03
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
0.8
0.7
0.6
0.5
VREF = 5V
0.4
0.3
VREF = 3.3V
0.2
-40°C
1
0
0
1
2
VREF = 1.8V
0.1
3
4
SUPPLY VOLTAGE (V)
5
6
0
0.1
1
10
OUTPUT TRANSITION FREQUENCY (kHz)
100
0
2
4
6
8
SINK CURRENT (mA)
_______________________________________________________________________________________
3
MAX9644/MAX9645/MAX9646
ELECTRICAL CHARACTERISTICS
Typical Operating Characteristics
(VCC = 3.3V, VREF = 1.8V, RPULLUP = 10kΩ to VPULLUP = 3.3V for MAX9644/MAX9645, GND = 0, TA = +25°C, unless otherwise noted.)
OUTPUT VOLTAGE HIGH
vs. SOURCE CURRENT (MAX9646)
INPUT BIAS CURRENT
vs. INPUT BIAS VOLTAGE
0.9
INPUT BIAS CURRENT (nA)
0.8
0.7
0.6
0.5
VCC = 5V
0.4
0.3
VCC = 3.3V
-5
-10
VCC = 1.8V
0.1
VCC = 3.3V
-20
0.5
1.0
1.5
2.0
2.5
3.0
0
0.05
0.10
0.15
0.20
0.25
SOURCE CURRENT (mA)
INPUT BIAS VOLTAGE (V)
REFERENCE VOLTAGE
vs. TEMPERATURE
REFERENCE VOLTAGE
vs. SUPPLY VOLTAGE
VCC = 3.3V
201.9
201.0
200.8
REFERENCE VOLTAGE (mV)
201.8
201.7
201.6
201.5
201.4
201.3
0.30
MAX9644 toc07
202.0
MAX9644 toc11
0
200.6
200.4
200.2
200.0
199.8
199.6
201.2
199.4
201.1
199.2
201.0
199.0
-15
10
35
60
85
1.0
1.5
2.0
2.5
3.0
3.5
4.0
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
PROPAGATION DELAY
vs. TEMPERATURE
PROPAGATION DELAY
vs. INPUT OVERDRIVE
VOD = ±100mV
16
15
VCC = 5V
14
13
VCC = 3.3V
12
VCC = 1.8V
11
10
4.5
5.0
80
70
PROPAGATION DELAY (µs)
17
MAX9644 toc08
-40
MAX9644 toc09
REFERENCE VOLTAGE (mV)
0
-15
0.2
0
60
50
VCC = 1.8V
40
VCC = 3.3V
30
VCC = 5V
20
10
0
9
-40
-15
10
35
TEMPERATURE (°C)
4
MAX9644 toc05
5
MAX9644 toc04
OIUTPUT VOLTAGE HIGH (VCC - VOH, V)
1.0
PROPAGATION DELAY (µs)
MAX9644/MAX9645/MAX9646
Low-Power Comparators with Precision
Reference in 4-Bump UCSP
60
85
0
50
100
150
200
250
INPUT OVERDRIVE (mV)
_______________________________________________________________________________________
Low-Power Comparators with Precision
Reference in 4-Bump UCSP
MAX9644 toc10
202.0
0.3V
VCC = 3.3V
201.9
REFERENCE VOLTAGE (mV)
IN+
100mV/div
0.1V
OUT
2V/div
0V
MAX9644 toc11
REFERENCE VOLTAGE
vs. TEMPERATURE
PROPAGATION DELAY AT VCC = 3.3V
201.8
201.7
201.6
201.5
201.4
201.3
201.2
201.1
201.0
100µs/div
-40
-15
10
35
60
85
OUTPUT RESPONSE TO
SUPPLY VOLTAGE TRANSIENT
POWER-UP/POWER-DOWN RESPONSE
MAX9644 toc12
MAX9644 toc13
VIN = 0.3V
VCC = 3.3V
3.2V
VIN = VTH + 1mV
3V
VCC
200mV/div
OUT
2V/div
VCC
2V/div
0V
OUT
2V/div
0V
VIN = VTH + 10mV
0V
VIN = VTH + 20mV
0V
OUT
2V/div
OUT
2V/div
0V
1ms/div
1ms/div
POWER-SUPPLY REJECTION
FOR NO FALSE TRIGGERING
MAX9644 toc14
206
TRIP POINT (mV)
204
202
UPPER TRIP POINT
200
198
LOWER TRIP POINT
196
VCC = 3.3V + 100mVP-P
194
10
100
1k
10k
100k
1M
FREQUENCY (Hz)
_______________________________________________________________________________________
5
MAX9644/MAX9645/MAX9646
Typical Operating Characteristics (continued)
(VCC = 3.3V, VREF = 1.8V, RPULLUP = 10kΩ to VPULLUP = 3.3V for MAX9644/MAX9645, GND = 0, TA = +25°C, unless otherwise noted.)
Low-Power Comparators with Precision
Reference in 4-Bump UCSP
MAX9644/MAX9645/MAX9646
Pin Configuration
TOP VIEW (BUMPS ON BOTTOM)
OUT
VCC
A1
A2
B2
UCSP
1
GND
2
GND
3
5
OUT
4
IN
IN
MAX9644
MAX9645
MAX9646
B1
+
VCC
MAX9644
MAX9645
MAX9646
GND
SOT23
Pin Description
PIN
6
NAME
UCSP
SOT23
A1
5
OUT
A2
4
IN
FUNCTION
Comparator Output. The MAX9644/MAX9645 have open-drain outputs. The MAX9646 has a
push-pull output.
Comparator Input. The MAX9644/MAX9646 have noninverting inputs. The MAX9645 has
inverting inputs.
B1
1
VCC
Power-Supply Voltage. Bypass to ground with a 0.1µF bypass capacitor.
B2
2, 3
GND
Ground
_______________________________________________________________________________________
Low-Power Comparators with Precision
Reference in 4-Bump UCSP
The MAX9644/MAX9645/MAX9646 are extremely small
comparators ideal for compact, low-current, and lowvoltage applications.
The ICs consume only 400nA (typ). The low-voltage
operating capability of the operating current makes
these devices extremely attractive to long-life batteryoperated devices—these applications can now use a
single digital power-supply rail to power the new generation of microcontrollers (which can be down to 0.9V).
All parts are available in a tiny 4-bump UCSP, which is
only 0.6mm tall and occupies a 1mm x 1mm footprint
and a 5-pin SOT23.
Input Stage Circuitry
Noninverting inputs are available on the MAX9644/
MAX9646 and inverting inputs are available on the
MAX9645.
The MAX9644/MAX9645/MAX9646 incorporate an innovative input stage architecture that allows their input
voltage to exceed VCC by several volts (limited only by
the Absolute Maximum Ratings). This is unlike traditional comparators that have an input ESD diode clamp
between the input and VCC, limiting this maximum overvoltage to about 0.3V. The ICs architecture maintains a
high input impedance to input signals even when the
device power-supply voltage is completely turned off
(VCC or REF taken to 0V). This greatly benefits flexible
power-saving schemes to be easily implemented in
advanced battery-operated devices. On-chip filtering
provides immunity from any RF noise being picked up by
input traces. These devices feature an internal temperature-compensated, low-power 0.2V reference voltage.
Output Stage Structure
The MAX9644/MAX9645 have open-drain outputs that
allow them to interface to logic circuitry running from
supply voltages other than the one supplied to the part.
These devices require an external pullup resistor or
current source for proper operation. Many microcontroller digital inputs ports can be readily programmed to
include these.
The MAX9646 has a push-pull output stage that can
both sink and source current, eliminating the need for
an external pullup resistor. In this case, the MAX9646
uses the microcontroller’s power supply as VCC.
Applications Information
Bypassing REF/VCC
Place a 0.1µF capacitor between REF or V CC and
GND as close as possible to the device. During a
switching event, all comparators draw a current spike
from their power-supply rails. This current spike is
minimized by the use of an internal break-before-make
design.
Hysteresis Operation
The ICs feature internal hysteresis for noise immunity
and glitch-free operation. If additional hysteresis is
needed, an external positive feedback network can be
easily implemented on the MAX9644 and MAX9646 noninverting input devices. Additional external hysteresis is
not possible on the MAX9645 because the noninverting
input of the comparator is not externally accessible.
Table 1. How Devices Behave Under Various Input Voltage Conditions
PART
MAX9644
MAX9645
MAX9646
INPUT VOLTAGE CONDITIONS
ACTION AT OUTPUT
VIN > 0.2V
External pullup resistor pulls output high.
VIN < 0.2V
Output asserts low.
VIN > 0.2V
Output asserts low.
VIN < 0.2V
External pullup resistor pulls output high.
VIN > 0.2V
Output asserts high.
VIN < 0.2V
Output asserts low.
_______________________________________________________________________________________
7
MAX9644/MAX9645/MAX9646
Detailed Description
Low-Power Comparators with Precision
Reference in 4-Bump UCSP
MAX9644/MAX9645/MAX9646
Typical Operating Circuits
VCC = 1.0V TO 5.5V
VDD
VCC = 1.0V TO 5.5V
VDD
INTERNAL
PULLUP
0.2V REF
INTERNAL
PULLUP
MAX9644
MAX9645
0.2V REF
OUT I/O
IN
OUT I/O
IN
MICROCONTROLLER
MICROCONTROLLER
VCC = 1.0V TO 5.5V
VDD
0.2V REF
MAX9646
OUT I/O
IN
MICROCONTROLLER
Chip Information
PROCESS: BiCMOS
8
_______________________________________________________________________________________
Low-Power Comparators with Precision
Reference in 4-Bump UCSP
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
LAND PATTERN NO.
4 UCSP
B4+1
21-0117
Refer to Application Note 1891
5 SOT23
U5+2
21-0057
90-0174
_______________________________________________________________________________________
9
MAX9644/MAX9645/MAX9646
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
Package Information (continued)
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
SOT-23 5L .EPS
MAX9644/MAX9645/MAX9646
Low-Power Comparators with Precision
Reference in 4-Bump UCSP
10
______________________________________________________________________________________
Low-Power Comparators with Precision
Reference in 4-Bump UCSP
REVISION
NUMBER
REVISION
DATE
0
3/11
DESCRIPTION
Initial release
PAGES
CHANGED
—
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11
© 2011 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
MAX9644/MAX9645/MAX9646
Revision History
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