MAX998 Maxim, MAX998 Datasheet

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MAX998

Manufacturer Part Number
MAX998
Description
The MAX976/MAX978/MAX998 dual/quad/single, high-speed, low-power comparators are optimized for +3V/+5V single-supply applications
Manufacturer
Maxim
Datasheet

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The MAX976/MAX978/MAX998 dual/quad/single, high-
speed, low-power comparators are optimized for
+3V/+5V single-supply applications. They achieve a
20ns propagation delay while consuming only 225µA
supply current per comparator. The MAX998 features a
low-power shutdown mode that places the output in a
high-impedance state and reduces supply current
to 1nA.
The MAX976/MAX978/MAX998 inputs have a common-
mode voltage range that extends 200mV below ground.
Their outputs are capable of rail-to-rail operation with-
out external pullup circuitry, making these devices ideal
for interface with CMOS/TTL logic. All inputs and out-
puts can tolerate a continuous short-circuit fault condi-
tion to either rail. The comparators’ internal hysteresis
ensures clean output switching, even with slow-moving
input signals.
For space-critical applications, the single MAX998 is
available in a 6-pin SOT23 package, the dual MAX976
is available in an 8-pin µMAX
MAX978 is available in a 16-pin QSOP package.
________________________Applications
___________Typical Operating Circuit
19-1299; Rev 3; 3/09
________________General Description
µMAX a registered 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.
Battery-Powered Systems
Threshold Detectors/Discriminators
3V Systems
IR Receivers
Digital Line Receivers
V
CC
V
CC
R1
R
________________________________________________________________ Maxim Integrated Products
D
Single/Dual/Quad, SOT23, Single-Supply,
IR RECEIVER
R2
High-Speed, Low-Power Comparators
GND
V
V
®
CC
CC
V
package, and the quad
CC
SHDN
0.1μF
MAX998
OUT
__________________Pin Configurations
♦ Single-Supply Operation Down to 2.7V
♦ 20ns Propagation Delay
♦ 225µA Supply Current
♦ 1nA Shutdown Supply Current
♦ Rail-to-Rail Outputs
♦ Ground-Sensing Inputs
♦ Internal Hysteresis Ensures Clean Switching
♦ Available in Space-Saving Packages
____________________________Features
_______________Ordering Information
*
ature range.
MAX976ESA
MAX976EUA
MAX978ESE
MAX978EEE
MAX998ESA
MAX998EUT-T
All devices are specified over the -40°C to +85°C temper-
Pin Configurations continued at end of data sheet
PART*
SOT23 (MAX998)
µMAX (MAX976)
QSOP (MAX978)
TOP VIEW
GND
OUT
IN+
1
2
3
16 Narrow SO
PIN-PACKAGE
8 SO
8 µMAX
16 QSOP
8 SO
6 SOT23
SOT23
MAX998
+ -
6
5
4
V
SHDN
IN-
CC
TOP MARK
AAAO
SOT
1

Related parts for MAX998

MAX998 Summary of contents

Page 1

... The MAX976/MAX978/MAX998 dual/quad/single, high- speed, low-power comparators are optimized for +3V/+5V single-supply applications. They achieve a 20ns propagation delay while consuming only 225µA supply current per comparator. The MAX998 features a low-power shutdown mode that places the output in a high-impedance state and reduces supply current to 1nA. ...

Page 2

... CC All others I = 2mA SOURCE 2mA SINK Sinking V = 5.5V CC Sourcing IN MAX998 only MAX998 only IL MAX998 only, SHDN = GND OUT CC MAX998 only Overdrive = 5mV C =10pF, LOAD (Note 5) Overdrive = 50mV CC C =10pF (Note 6) LOAD MAX976/MAX978 only /t C =10pF ...

Page 3

... SYMBOL Wake-Up from Shutdown Power-Up Delay Note 1: The MAX998EUT specifications are 100% tested at T teed by design, not production tested. Note 2: Inferred from CMRR test. Either input can be driven to the absolute maximum limit without false output inversion, as long as the other input is within the common-mode voltage range. ...

Page 4

Single/Dual/Quad, SOT23, Single-Supply, High-Speed, Low-Power Comparators ______________________________Typical Operating Characteristics (continued +5V 0V +25°C, unless otherwise noted PROPAGATION DELAY vs. INPUT OVERDRIVE 15pF 80 LOAD ...

Page 5

... They achieve a 20ns propagation delay while consum- ing only 225µA of supply current per comparator. The MAX998 features a low-power shutdown mode that places the output in a high-impedance state and reduces supply current to 1nA. Activate shutdown mode by driving SHDN low. ...

Page 6

... Shutdown Mode The MAX998 features a low-power shutdown mode, which is activated by forcing SHDN low. Shutdown mode reduces the supply current to 1nA (typical), dis- ables the comparator, and places the output in a high- impedance state ...

Page 7

... V THR THF The Typical Operating Circuit shows an application using the MAX998 as an infrared receiver. The infrared photo- diode creates a current relative to the amount of infrared light present. This current creates a voltage across R When this voltage level crosses the voltage applied by the voltage divider to the inverting input, the output transitions. ...

Page 8

... Single/Dual/Quad, SOT23, Single-Supply, High-Speed, Low-Power Comparators ______________________________________________Pin Configurations (continued) TOP VIEW MAX998 N. GND 4 SO ___________________Chip Information PROCESS: CMOS 8 _______________________________________________________________________________________ MAX976 INA SHDN + INA OUTA OUT INB OUTB - INB GND 5 N.C. SO/μMAX MAX978 ...

Page 9

... Single/Dual/Quad, SOT23, Single-Supply, High-Speed, Low-Power Comparators For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE QSOP 6 SOT23 8 µMAX _______________________________________________________________________________________ Package Information PACKAGE CODE S8-2 S16M-3 E16M-1 U6-2 U8-1 PACKAGE OUTLINE, SOT 6L BODY DOCUMENT NO. 21-0041 21-0041 21-0055 21-0058 ...

Page 10

... Single/Dual/Quad, SOT23, Single-Supply, High-Speed, Low-Power Comparators For the latest package outline information and land patterns www.maxim-ic.com/packages. 10 ______________________________________________________________________________________ Package Information (continued) PACKAGE OUTLINE, SOT 6L BODY 21-0058 ...

Page 11

... REVISION NUMBER DATE 0 10/97 Initial release 1 1/98 Adding specs for MAX998 2 1/07 Adding input current ratings to Abs Max Update Chip Information, Package Info, correct unit measurement in TOC 8, style 3 3/09 changes Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied ...

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