MAX918 Maxim, MAX918 Datasheet

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MAX918

Manufacturer Part Number
MAX918
Description
The MAX917–MAX920 nanopower comparators in space-saving SOT23 packages feature Beyond-the-Rails™ inputs and are guaranteed to operate down to +1
Manufacturer
Maxim
Datasheet

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The MAX917–MAX920 nanopower comparators in
space-saving SOT23 packages feature Beyond-the-
Rails™ inputs and are guaranteed to operate down to
+1.8V. The MAX917/MAX918 feature an on-board
1.245V ±1.5% reference and draw an ultra-low supply
current of only 750nA, while the MAX919/MAX920 (with-
out reference) require just 380nA of supply current.
These features make the MAX917–MAX920 family of
comparators ideal for all 2-cell battery applications,
including monitoring/management.
The unique design of the output stage limits supply-cur-
rent surges while switching, virtually eliminating the
supply glitches typical of many other comparators. This
design also minimizes overall power consumption
under dynamic conditions. The MAX917/MAX919 have
a push-pull output stage that sinks and sources current.
Large internal output drivers allow rail-to-rail output
swing with loads up to 8mA. The MAX918/MAX920
have an open-drain output stage that makes them suit-
able for mixed-voltage system design.
Typical Application Circuit appears at end of data sheet.
19-1512; Rev 2; 10/10
Beyond-the-Rails is a trademark of Maxim Integrated Products, Inc.
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.
MAX917
MAX918
MAX919
MAX920
PART
2-Cell Battery Monitoring/Management
Ultra-Low-Power Systems
Mobile Communications
Notebooks and PDAs
Threshold Detectors/Discriminators
Sensing at Ground or Supply Line
Telemetry and Remote Systems
Medical Instruments
SOT23, 1.8V, Nanopower, Beyond-the-Rails
REFERENCE
INTERNAL
Yes
Yes
No
No
________________________________________________________________ Maxim Integrated Products
General Description
Comparators With/Without Reference
Open-Drain
Open-Drain
Push-Pull
Push-Pull
OUTPUT
TYPE
Selector Guide
Applications
CURRENT
SUPPLY
(nA)
750
750
380
380
♦ Ultra-Low Supply Current
♦ Guaranteed to Operate Down to +1.8V
♦ Internal 1.245V ±1.5% Reference
♦ Input Voltage Range Extends 200mV
♦ CMOS Push-Pull Output with ±8mA Drive
♦ Open-Drain Output Versions Available
♦ Crowbar-Current-Free Switching
♦ Internal Hysteresis for Clean Switching
♦ No Phase Reversal for Overdriven Inputs
♦ Space-Saving SOT23 Package
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
Pin Configurations continue at end of data sheet.
MAX917EUK+T
MAX917ESA+
MAX918EUK+T
MAX918ESA+
MAX919EUK+T
MAX919EUK/V+T
MAX919ESA+
MAX920EUK+T
MAX920ESA+
( ) ARE FOR MAX917/MAX918.
(MAX917/MAX918)
Beyond-the-Rails
Capability (MAX917/MAX919)
(MAX918/MAX920)
TOP VIEW
380nA per Comparator (MAX919/MAX920)
750nA per Comparator with Reference
PART
(MAX917/MAX918)
OUT
V
IN+
EE
PIN-PACKAGE
5 SOT23
8 SO
5 SOT23
8 SO
5 SOT23
5 SOT23
8 SO
5 SOT23
8 SO
1
2
3
Ordering Information
MAX917
MAX918
MAX919
MAX920
SOT23
Pin Configurations
5
4
V
IN- (REF)
MARK
AFGP
CC
ADIQ
ADIR
ADIS
TOP
ADIT
Features
CODE
U5+1
U5+1
U5+1
U5+1
U5+1
S8+2
S8+2
S8+2
S8+2
PKG
1

Related parts for MAX918

MAX918 Summary of contents

Page 1

... The MAX917/MAX919 have a push-pull output stage that sinks and sources current. Large internal output drivers allow rail-to-rail output swing with loads up to 8mA. The MAX918/MAX920 have an open-drain output stage that makes them suit- able for mixed-voltage system design. ...

Page 2

... SOURCE MIN T = +25° 5V 8mA SINK MIN +25° 1.8V 1mA SINK MIN MAX918 only 5. Sourcing 1. Sinking 1. +70° +25°C.) (Note 1) A MIN TYP MAX 1.8 5.5 0.75 ...

Page 3

... SOT23, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference ELECTRICAL CHARACTERISTICS—MAX917/MAX918 (continued +5V 0V IN+ REF A PARAMETER SYMBOL High-to-Low Propagation Delay t PD- (Note 4) Low-to-High Propagation Delay t PD+ (Note 4) Rise Time t RISE Fall Time t FALL Power-Up Time t ON Reference Voltage ...

Page 4

... Note 3: The hysteresis-related trip points are defined as the edges of the hysteresis band, measured with respect to the center of the band (i.e (Figure 2). OS Note 4: Specified with an input overdrive (V above and beyond the offset voltage and hysteresis of the comparator input. For the MAX917/MAX918, reference voltage error should also be added. 4 _______________________________________________________________________________________ CONDITIONS ...

Page 5

... AND TEMPERATURE 600 500 400 T = +25°C A 300 T = +85°C A 200 T = -40°C A 100 SINK CURRENT (mA) MAX917/MAX918 SUPPLY CURRENT vs. TEMPERATURE 900 850 800 CC 750 700 650 V = 1.8V CC 600 550 500 -40 - TEMPERATURE (°C) MAX919/MAX920 SUPPLY CURRENT vs ...

Page 6

... TEMPERATURE (°C) MAX917/MAX918 REFERENCE VOLTAGE vs. TEMPERATURE 1.246 1.245 1.244 V = 1.8V CC 1.243 1.242 1.241 -40 - TEMPERATURE (°C) MAX917/MAX918 REFERENCE OUTPUT VOLTAGE vs. REFERENCE SINK CURRENT 1.2460 V = 1.8V CC 1.2455 1.2450 1.2445 1.2440 1.2435 ...

Page 7

... TEMPERATURE (°C) PROPAGATION DELAY (t PD- vs. INPUT OVERDRIVE 1. INPUT OVERDRIVE (mV) MAX918/MAX920 PROPAGATION DELAY (t PD+ PULLUP RESISTANCE 250 200 150 100 1. 100 1k 10k R (kΩ) PULLUP PROPAGATION DELAY ( ...

Page 8

SOT23, 1.8V, Nanopower, Beyond-the-Rails Comparators With/Without Reference (V = +5V 0V 15pF OVERDRIVE MAX917/MAX919 PROPAGATION DELAY ( 5V) CC MAX917-920 toc28 IN+ (50mV/ div) OUT (2V/div) 20μs/div PROPAGATION ...

Page 9

... Positive Supply Voltage N.C. No Connection. Not internally connected. output stage that sinks as well as sources current. The MAX918/MAX920 have an open-drain output stage that can be pulled beyond V 6V above V implementing wire-ORed output logic functions. The input common-mode voltage range extends from any differential input voltage within these limits ...

Page 10

... In battery- powered applications, this characteristic results in a substantial increase in battery life. Reference (MAX917/MAX918) The internal reference in the MAX917/MAX918 has an output voltage of +1.245V with respect to V cal temperature coefficient is 95ppm/°C over the full -40°C to +85°C temperature range. The reference is a PNP emitter-follower driven by a 120nA current source (Figure 1) ...

Page 11

... OUT Additional Hysteresis (MAX918/MAX920 REF R3 The MAX918/MAX920 have a 4mV internal hysteresis band. They have open-drain outputs and require an external pullup resistor (Figure 4). Additional hysteresis = 5V, and can be generated using positive feedback, but the for- mulas differ slightly from those of the MAX917/ MAX919 ...

Page 12

... Figure 4. MAX918/MAX920 Additional Hysteresis Pin Configurations (continued) TOP VIEW N.C. 1 IN- (REF) 2 MAX917 MAX918 3 IN+ MAX919 MAX920 ARE FOR MAX917/MAX918. 12 ______________________________________________________________________________________ Figure 5 shows a zero-crossing detector application. ⎛ ⎞ ⎜ ⎟ The MAX919’s inverting input is connected to ground, ⎝ ⎠ R1 ...

Page 13

... Comparators With/Without Reference For the latest package outline information and land patterns 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 ...

Page 14

... Comparators With/Without Reference For the latest package outline information and land patterns 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 ...

Page 15

... Added lead-free and automotive qualified parts 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. 15 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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