Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

MAX9140 Datasheet(PDF) 7 Page - Maxim Integrated Products

Part # MAX9140
Description  40ns, Low-Power, 3V/5V, Rail-to-Rail Single-Supply Comparators
Download  15 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX9140 Datasheet(HTML) 7 Page - Maxim Integrated Products

Back Button MAX9140_10 Datasheet HTML 3Page - Maxim Integrated Products MAX9140_10 Datasheet HTML 4Page - Maxim Integrated Products MAX9140_10 Datasheet HTML 5Page - Maxim Integrated Products MAX9140_10 Datasheet HTML 6Page - Maxim Integrated Products MAX9140_10 Datasheet HTML 7Page - Maxim Integrated Products MAX9140_10 Datasheet HTML 8Page - Maxim Integrated Products MAX9140_10 Datasheet HTML 9Page - Maxim Integrated Products MAX9140_10 Datasheet HTML 10Page - Maxim Integrated Products MAX9140_10 Datasheet HTML 11Page - Maxim Integrated Products Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 15 page
background image
Detailed Description
The MAX9140/MAX9141/MAX9142/MAX9144 single-
supply comparators feature internal hysteresis, high
speed, and low power. Their outputs are pulled to with-
in 300mV of either supply rail without external pullup or
pulldown circuitry. Rail-to-rail input voltage range and
low-voltage single-supply operation make these
devices
ideal
for
portable
equipment.
The
MAX9140/MAX9141/MAX9142/MAX9144 interface
directly to CMOS and TTL logic.
Most high-speed comparators oscillate in the linear
region because of noise or undesired parasitic feed-
back. This tends to occur when the voltage on one
input is at or equal to the voltage on the other input. To
counter the parasitic effects and noise, the MAX9140/
MAX9141/MAX9142/MAX9144 have an internal hystere-
sis of 1.5mV.
The hysteresis in a comparator creates two trip points:
one for the rising input voltage and one for the falling
input voltage (Figure 1). The difference between the trip
points is the hysteresis. The average of the trip points is
the offset voltage. When the comparator’s input volt-
ages are equal, the hysteresis effectively causes one
comparator input voltage to move quickly past the
other, thus taking the input out of the region where
oscillation occurs. Standard comparators require hys-
teresis to be added with external resistors. The
MAX9140/MAX9141/MAX9142/MAX9144’s fixed internal
hysteresis eliminates these resistors. To increase hys-
teresis and noise margin even more, add positive feed-
back with two resistors as a voltage divider from the
output to the noninverting input.
Figure 1 illustrates the case where IN- is fixed and IN+
is varied. If the inputs were reversed, the figure would
look the same, except the output would be inverted.
The MAX9141 includes an internal latch that allows
storage of comparison results. The L
E pin has a high
input impedance. If L
E is high, the latch is transparent
(i.e., the comparator operates as though the latch is not
present). The comparator's output state is latched
when L
E is pulled low (Figure 2).
Shutdown Mode (MAX9141 Only)
The MAX9141 shuts down when the
S
H
D
N
pin is low.
When shut down, the supply current drops to less than
12µA, and the three-state output becomes high imped-
ance. The
S
H
D
N
pin has a high-input impedance.
Connect S
H
D
N
to VCC for normal operation. Exit shut-
down with L
E
high (transparent state); otherwise, the
output will be indeterminate.
Input Stage Circuitry
The MAX9140/MAX9141/MAX9142/MAX9144 include
internal protection circuitry that prevents damage to the
precision input stage from large differential input volt-
ages. This protection circuitry consists of two back-to-
back diodes between IN+ and IN- as well as two series
4.1kΩ resistors (Figure 3). The diodes limit the differen-
tial voltage applied to the internal circuitry of the com-
parators to be no more than 2VF, where VF is the for-
ward voltage drop of the diode (about 0.7V at +25°C).
For a large differential input voltage (exceeding 2VF),
this protection circuitry increases the input bias current
at IN+ (source) and IN- (sink).
Input Current =
(IN+ - IN-) - 2VF
2 x 4.1kΩ
Input current with large differential input voltages
should not be confused with input bias current (IB). As
long as the differential input voltage is less than 2VF,
this input current is equal to IB. The output is in the cor-
rect logic state if one or both inputs are within the com-
mon-mode range.
40ns, Low-Power, 3V/5V, Rail-to-Rail
Single-Supply Comparators
_______________________________________________________________________________________
7
VTRIP+
VHYST
VTRIP-
COMPARATOR
OUTPUT
VOH
VOL
VTRIP+ + VTRIP-
2
VOS =
VIN- = 0
VIN+
Figure 1. Input and Output Waveform, Noninverting Input
Varied


Similar Part No. - MAX9140_10

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
MAX9140-MAX9144 MAXIM-MAX9140-MAX9144 Datasheet
326Kb / 12P
   40ns, Low-Power, 3V/5V, Rail-to-Rail Single-Supply Comparators
Rev 0; 6/01
MAX9140EUK-T MAXIM-MAX9140EUK-T Datasheet
326Kb / 12P
   40ns, Low-Power, 3V/5V, Rail-to-Rail Single-Supply Comparators
Rev 0; 6/01
MAX9140EXK-T MAXIM-MAX9140EXK-T Datasheet
326Kb / 12P
   40ns, Low-Power, 3V/5V, Rail-to-Rail Single-Supply Comparators
Rev 0; 6/01
More results

Similar Description - MAX9140_10

ManufacturerPart #DatasheetDescription
logo
Maxim Integrated Produc...
MAX9140 MAXIM-MAX9140 Datasheet
326Kb / 12P
   40ns, Low-Power, 3V/5V, Rail-to-Rail Single-Supply Comparators
Rev 0; 6/01
MAX941 MAXIM-MAX941_08 Datasheet
266Kb / 14P
   High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators
Rev 8; 11/08
MAX941 MAXIM-MAX941 Datasheet
165Kb / 12P
   High-Speed, Low-Power, 3V/5V, Rail-to-Rail Single-Supply Comparators
Rev 3; 6/97
MAX941 MAXIM-MAX941_09 Datasheet
893Kb / 14P
   High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators
Rev 9; 3/09
logo
Linear Technology
LT1712 LINER-LT1712_15 Datasheet
226Kb / 12P
   Single/Dual 4.5ns, 3V/5V/5V, Rail-to-Rail Comparators
LT1711 LINER-LT1711_15 Datasheet
226Kb / 12P
   Single/Dual 4.5ns, 3V/5V/5V, Rail-to-Rail Comparators
LT1713 LINER-LT1713 Datasheet
232Kb / 16P
   Single/Dual, 7ns, Low Power,3V/5V/짹5V Rail-to-Rail Comparators
LT1711 LINER-LT1711 Datasheet
214Kb / 12P
   Single/Dual 4.5ns, 3V/5V, Rail-to-Rail Comparators
logo
Maxim Integrated Produc...
MAX49140 MAXIM-MAX49140 Datasheet
394Kb / 13P
   30ns, Low-Power, 3V/5V, Rail-to-Rail Single-Supply Comparator
2020
logo
Linear Technology
LT1720 LINER-LT1720 Datasheet
317Kb / 28P
   Dual/Quad, 4.5ns, Single Supply 3V/5V Comparators with Rail-to-Rail Outputs
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com