參數(shù)資料
型號： TC1038CECH
廠商： Microchip Technology Inc.
英文描述： Linear Building Block . Single Comparator in SOT Packages
中文描述： 線性積木。采用SOT比較單一的軟件包
文件頁數(shù)： 5/18頁
文件大?。?/td> 481K
代理商： TC1038CECH
2002 Microchip Technology Inc.
DS21344B-page 5
TC1037/TC1038/TC1039
3.0
DETAILED DESCRIPTION
The TC1037/TC1038/TC1039 are a series of very low
power, linear building block products targeted at low
voltage, single supply applications. The TC1037/
TC1038/TC1039 minimum operating voltage is 1.8V
and typical supply current is only 4
μ
A for the TC1037
and TC1038 (fully enabled) and 6
μ
A for the TC1039.
3.1
Comparator
The
comparator’s input range extends beyond both supply
voltages by 200mV and the outputs will swing to within
several millivolts of the supplies depending on the load
current being driven.
TC1037/8/9
contain
one
comparator.
The
The comparator exhibits a propagation delay and
supply current which is largely independent of supply
voltage. The low input bias current and offset voltage
makes it suitable for high
applications.
impedance precision
The TC1038 comparator is disabled during shutdown
and has a high impedance output.
3.2
Voltage Reference
A 2.0% tolerance, internally biased, 1.20V bandgap
voltage reference is included in the TC1039. It has a
push-pull output capable of sourcing and sinking at
least 50
μ
A.
3.3
Shutdown Input (TC1038 Only)
SHDN at V
IL
disables the comparator and reduces the
supply current to less than 0.3
μ
A. The SHDN input
cannot be allowed to float. When not used, connect it to
V
DD
. The comparator’s output is in a high impedance
state when the TC1038 is disabled. The comparator’s
inputs can be driven from rail-to-rail by an external
voltage when the TC1038 is disabled. No latchup will
occur when the device is driven to its enabled state
when SHDN is set to V
IH
.
4.0
TYPICAL APPLICATIONS
The TC1037/TC1038/TC1039 family lends itself to a
wide variety of applications, particularly in battery
powered systems. It typically finds application in power
management, processor supervisory and interface
circuitry.
4.1
External Hysteresis (Comparator)
Hysteresis can be set externally with two resistors
using positive feedback techniques (see Figure 4-1).
The design procedure for setting external comparator
hysteresis is as follows:
1.
Choose the feedback resistor R
C
. Since the
input bias current of the comparator is at most
100pA, the current through R
C
can be set to
100nA (i.e., 1000 times the input bias current)
and retain excellent accuracy. The current
through R
C
at the comparator’s trip point is V
R
/
R
C
where V
R
is a stable reference voltage.
Determine the hysteresis voltage (V
HY
) between
the upper and lower thresholds.
Calculate R
A
as follows:
EQUATION 4-1:
2.
3.
4.
Choose the rising threshold voltage for V
SRC
(V
THR
).
Calculate R
B
as follows:
5.
EQUATION 4-2:
6.
Verify
formulas:
the
threshold
voltages
with
these
V
SRC
rising:
EQUATION 4-3:
V
SRC
falling:
EQUATION 4-4:
R
A
R
C
V
V
DD
----------
=
R
B
V
R
R
A
×
---------------------
R
A
--1
–
R
C
--1
–
---------V
=
V
THR
V
R
(
)
R
A
(
)
R
A
--1
R
B
-1
R
C
--1
+
+
=
V
THF
V
THR
R
------------------------
V
R
C
–
=
相關PDF資料
PDF描述
TC1039CECH Linear Building Block . Single Comparator in SOT Packages
TC1041CEOA Linear Building Block . Dual Low Power Comparator and Voltage Reference with Programmable Hysteresis
TC1041 Linear Building Block . Dual Low Power Comparator and Voltage Reference with Programmable Hysteresis
TC1041CEUA Linear Building Block . Dual Low Power Comparator and Voltage Reference with Programmable Hysteresis
TC1043 Linear Building Block . Low Power Voltage Reference with Dual Op Amp, Dual Comparator, and Shutdown Mode
相關代理商/技術參數(shù)
參數(shù)描述
TC1038CECHTR 功能描述:校驗器 IC Single RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
TC1039 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Linear Building Block . Single Comparator in SOT Packages
TC1039CECH 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Linear Building Block . Single Comparator in SOT Packages
TC1039CECHTR 功能描述:校驗器 IC Single RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
TC103-TW-B 制造商:Carling Technologies 功能描述:T-SERIES ROCKER SWITCH - Bulk
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