參數(shù)資料
型號(hào)： MAX9017
廠商： Maxim Integrated Products, Inc.
英文描述： SOT23. Dual. Precision. 1.8V. Nanopower Comparators With/Without Reference
中文描述： SOT23封裝、雙路、高精度、1.8V、納安級(jí)功耗比較器，帶或不帶基準(zhǔn)
文件頁數(shù)： 13/16頁
文件大小： 446K
代理商： MAX9017
6) Verify the trip voltages and hysteresis as follows:
V
IN
rising: = 2.992V, which is equivalent to REF
times R1 divided by the parallel combination of R1,
R2:
and R3.
V
IN
falling: = 2.942V:
Hysteresis = V
THR
- V
THF
= 50mV.
Additional Hysteresis
(MAX9016/MAX9018/MAX9020)
(Open-Drain Outputs)
The MAX9016/MAX9018/MAX9020 feature a built-in 4mV
hysteresis band. These devices have open-drain outputs
and require an external pullup resistor (Figure 3).
Additional hysteresis can be generated using positive
feedback, but the formulas differ slightly from those of
the MAX9015/MAX9017/MAX9019. Use the following
procedure to calculate resistor values:
1) Select R3. Input bias current at IN_+ is less than
2nA, so the current through R3 should be at least
0.2μA to minimize errors caused by input bias cur-
rent. The current through R3 at the trip point is
(V
REF
- V
OUT
)/R3. Considering the two possible out-
put states in solving for R3 yields two formulas: R3
= V
REF
/I
R3
or R3 = [(V
CC
- V
REF
)/I
R3
] - R4. Use the
smaller of the two resulting resistor values. For
example, when using the MAX9018 (V
REF
= 1.24V)
and V
CC
= 5V, and if we choose I
R3
= 0.2μA, and
R4 = 1M
, then the two resistor values are 6.2M
and 18M
. Choose a 6.2M
standard value for R3.
2) Choose the hysteresis band required (V
HB
).
3) Calculate R1 according to the following equation.
For this example, insert the values:
4) Choose the trip point for V
IN
rising (V
THR
) such that:
(V
THR
is the trip point for V
IN
rising). This is the
threshold voltage at which the comparator switches
its output from low to high as V
IN
rises above the
trip point. For this example, choose 3V:
5) Calculate R2 as follows:
For this example, choose a 49.9k
standard value.
6) Verify the trip voltages and hysteresis as follows:
Hysteresis = V
THR
- V
THF
= 50mV.
V
falling V
V
x R
R
R
R
R
+
R
R
x V
V
IN
THF
REF
CC
:
.
=
+
1
+
=
1
1
1
2
1
3
1
3
4
2 993
V
ri
V
x R
R
R
R
V
IN
THR
REF
sing V
.
=
+
1
+
=
1
1
1
2
1
3
3 043
R
V
V x
k
k
M
k
2
1
3 0
.
1 24
.
72
1
72
1
6 2
.
51 1
=
=
.
R
V
V
x R
R
R
THR
REF
2
1
1
1
1
1
3
=
V
V
V
V
THR
REF
HB
CC
>
+
1
R
M
M
1
mV
V
5
k
1
6 2
50
72
=
+
=
)
R
R
(
R
V
V
HB
CC
1
3
4
=
+
)
V
V
R x V
R
THF
THR
CC
=
1
3
V
V
x R
R
R
R
THR
REF
=
+
1
+
1
1
1
2
1
3
M
SOT23, Dual, Precision, 1.8V, Nanopower
Comparators With/Without Reference
______________________________________________________________________________________
13
V
EE
V
CC
OUT
R3
R2
R1
R4
V
REF
V
IN
V
CC
MAX9016
MAX9018
MAX9020
Figure 3. MAX9016/MAX9018/MAX9020 Additional Hysteresis
相關(guān)PDF資料
PDF描述
MAX9018 SOT23. Dual. Precision. 1.8V. Nanopower Comparators With/Without Reference
MAX9019 SOT23. Dual. Precision. 1.8V. Nanopower Comparators With/Without Reference
MAX9020 SOT23. Dual. Precision. 1.8V. Nanopower Comparators With/Without Reference
MAX9019EKA SOT23, Dual, Precision, 1.8V, Nanopower Comparators With/Without Reference
MAX9015A SOT23, Dual, Precision, 1.8V, Nanopower Comparators With/Without Reference
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX9017A 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:SOT23, Dual, Precision, 1.8V, Nanopower Comparators With/Without Reference
MAX9017AEKA 制造商:Maxim Integrated Products 功能描述:SOT23, DUAL, PRECISION, 1.8V, NANOPOWER COMPARATOR - Rail/Tube
MAX9017AEKA/V+T 功能描述:校驗(yàn)器 IC Dual Precision 1.8V nPower Comparator 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(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
MAX9017AEKA+ 制造商:Maxim Integrated Products 功能描述:COMPARATOR DUAL R-R O/P 5.5V 8PIN SOT-23 - Rail/Tube
MAX9017AEKA+T 功能描述:校驗(yàn)器 IC Dual Precision 1.8V nPower Comparator 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(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
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