參數(shù)資料
型號： MAX9077EKA-T
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 運動控制電子
英文描述： Low-Cost, Ultra-Small, 3レA Single-Supply Comparators
中文描述： DUAL COMPARATOR, 8000 uV OFFSET-MAX, 580 ns RESPONSE TIME, PDSO8
封裝： MO-178BA, SOT-23, 8 PIN
文件頁數(shù)： 6/8頁
文件大?。?/td> 108K
代理商： MAX9077EKA-T
M
Low-Cost, Ultra-S mall, 3μA
S ingle-S upply Comparators
6
_______________________________________________________________________________________
Pin Desc ription
FUNCTION
NAME
SOT23-5
MAX9077
SO
SC70-5
SOT23-8
—
1
—
Comparator Output
OUT
1
1
—
1
4
2
2
Ground
GND
2
Output of Comparator A
OUTA
—
—
3
—
3
—
4
Noninverting Input of Comparator A
INA+
—
—
4
—
2
—
3
Inverting Input of Comparator A
INA-
—
Inverting Comparator Input
IN-
4
Noninverting Comparator Input
IN+
3
8
5
8
Positive Supply Voltage
V
CC
5
5
—
5
6
—
6
Inverting Input of Comparator B
INB-
—
7
—
7
Output of Comparator B
OUTB
—
Noninverting Input of Comparator B
INB+
—
MAX9075
PIN
Detailed Desc ription
The MAX9075/MAX9077 feature a 580ns propagation
delay from an ultra-low supply current of only 3μA per
comparator. These devices are capable of single-sup-
ply operation in the +2.1V to +5.5V range. Large inter-
nal output drivers allow rail-to-rail output swing with up
to 2mA loads. Both comparators offer a push-pull out-
put that sinks and sources current.
Comparator Output
The MAX9075/MAX9077 are designed to maintain a
low supply current during repeated transitions by limit-
ing the shoot-through current.
Noise Considerations, Comparator Input
The input common-mode voltage range for these
devices extends from -0.2V to V
CC
- 1.2V. Unlike many
other comparators, the MAX9075/MAX9077 can oper-
ate at any differential input voltage within these limits.
Input bias current is typically -5nA if the input voltage is
between the supply rails.
Although the comparators have a very high gain, useful
gain is limited by noise. The comparator has a wide-
band peak-to-peak noise of approximately 70μV.
Applic ations Information
Adding Hysteresis
Hysteresis extends the comparator’s noise margin by
increasing the upper threshold and decreasing the
lower threshold. A voltage divider from the output of the
comparator sets the trip voltage. Therefore, the trip
voltage is related to the output voltage. Set the hystere-
sis with three resistors using positive feedback, as
shown in Figure 1.
The design procedure is as follows:
1) Choose R3. The leakage current of IN+ may cause a
small error; however, the current through R3 can be
approximately 500nA and still maintain accuracy.
The added supply current due to the circuit at the
trip point is V
CC
/R3; 10M
is a good practical value
for R3, as this keeps the current well below the sup-
ply current of the chip.
2) Choose the hysteresis voltage (V
HYS
), which is the
voltage between the upper and lower thresholds. In
this example, choose V
HYS
= 50mV and assume
V
REF
= 1.2V and V
CC
= 5V.
3) Calculate R1 as follows:
R1 = R3
·
V
HYS
/ V
CC
= 10M
·
0.05 / 5 = 100k
相關(guān)PDF資料
PDF描述
MAX9075 Low-Cost, Ultra-Small, 3レA Single-Supply Comparators
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參數(shù)描述
MAX9077ESA 功能描述:校驗器 IC 3uA Single-Supply 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 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
MAX9077ESA+ 功能描述:校驗器 IC 3uA Single-Supply 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 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
MAX9077ESA+T 功能描述:校驗器 IC 3uA Single-Supply 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 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
MAX9077ESA-T 功能描述:校驗器 IC 3uA Single-Supply 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 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
MAX9077EUA 功能描述:校驗器 IC 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(yīng)時間: 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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