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參數資料
| 型號： | ADCMP343YRJZ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Dual 0.275% Comparators and Reference with Programmable Hysteresis |
| 中文描述： | DUAL COMPARATOR, 8000 ns RESPONSE TIME, PDSO8 |
| 封裝： | LEAD FREE, MO-178BA, SOT-23, 8 PIN |
| 文件頁數： | 1/12頁 |
| 文件大?。?/td> | 300K |
| 代理商： | ADCMP343YRJZ-REEL7 |
Dual 0.275% Comparators and Reference
with Programmable Hysteresis
ADCMP341/ADCMP343
FEATURES
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2007 Analog Devices, Inc. All rights reserved.
www.analog.com
400 mV ± 0.275% threshold
User programmable hysteresis via resistor string
Supply range: 1.7 V to 5.5 V
Low quiescent current: 6.5 μA typical
Input range includes ground
Low input bias current: ±5 nA maximum
Open-drain outputs
Supports wired-AND connections
Input polarities:
ADCMP341 noninverting
ADCMP343 inverting
Small SOT-23 package
APPLICATIONS
Portable applications
Li-Ion monitoring
Handheld instruments
LED/relay driving
Optoisolator driving
Control systems
GENERAL DESCRIPTION
The ADCMP341/ADCMP343 consist of two low power, high
accuracy comparators with a 400 mV reference in an 8-lead
SOT-23 package. Operating within a supply range of 1.7 V to
5.5 V, the devices only draw 6.5 μA (typical), making them ideal
for low voltage system monitoring and portable applications.
Hysteresis is determined using three resistors in a string configura-
tion with the upper and lower tap points connected to the
±INA_U and ±INA_L pins of each comparator, respectively.
The state of the outputs of the comparators selects which pin is
internally connected to the comparators input. Therefore, a
change of state in the comparators output results in one of the
inputs being switched in to the comparator and the other being
switched out. This provides the user with a fully flexible and
accurate method of setting the hysteresis. One input of each
comparator is internally connected to the reference. The other
input is available externally, via an internal mux, through pins
±INA_U or ±INA_L. The state of the output determines which
of these pins is connected at any one time.
The comparator outputs are open-drain with the output stage
sinking capability guaranteed greater than 5 mA over temperature.
The ADCMP341 has noninverting inputs and the ADCMP343
has inverting inputs. The devices are suitable for portable,
commercial, industrial, and automotive applications.
FUNCTIONAL BLOCK DIAGRAMS
+INA_U
+INB_U
OUTA
M
M
OUTB
V
DD
GND
400mV
ADCMP341
+INA_L
+INB_L
VINB
VINA
R1
R2
R3
0
Figure 1. ADCMP341
–INA_U
–INB_U
OUTA
M
M
OUTB
V
DD
GND
400mV
ADCMP343
–INA_L
–INB_L
VINB
VINA
0
R1
R2
R3
Figure 2. ADCMP343
CH1
2.00V
Figure 3. Hysteresis programmed to 513 mV @ V
IN
on ADCMP341
CH2 500mV
2
1
0
OUTA
V
IN
R1 = 22k
R2 = 2.2k
R3 = 6.2k
M100ms
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