參數(shù)資料
型號: NCS2002
廠商: ON SEMICONDUCTOR
英文描述: Sub-One Volt Rail-to-Rail Operational Amplifier with Enable Feature
中文描述: 小組一電壓軌至軌運算放大器的啟動特性
文件頁數(shù): 13/16頁
文件大小: 124K
代理商: NCS2002
NCS2002, NCV2002
http://onsemi.com
13
The noninverting input threshold levels are set so that
the capacitor voltage oscillates between 1/3 and 2/3 of
V
CC
. This requires the resistors R
1a
, R
1b
and R
2
to be of
equal value. The following formula can be used to
approximate the output frequency.
R
T
470 k
R
2
470 k
R
1b
470 k
R
1a
470 k
C
T
1.0 nF
0.9 V
f
O
= 1.5 kHz
0.67 V
CC
0.33 V
CC
R
1b
470 k
V
CC
D
2
1N4148
f
O
+
+
0.9 V
fO
1
1.39 R
T
C
T
V
CC
0
Output Voltage
Timing Capacitor
Voltage
V
CC
R
2
470 k
D
1
1N4148
10 k
10 k
1.0 M
cw
R
1a
470 k
C
T
1.0 nF
0.67 V
CC
V
CC
0.33 V
CC
0
Output Voltage
Timing Capacitor
Voltage
0.67 V
CC
V
CC
0.33 V
CC
0
Output Voltage
Timing Capacitor
Voltage
The timing capacitor C
T
will charge through diode D
2
and discharge
through diode D
1
, allowing a variable duty cycle. The pulse width of the
signal can be programmed by adjusting the value of the trimpot. The ca-
pacitor voltage will oscillate between 1/3 and 2/3 of V
CC
, since all the
resistors at the noninverting input are of equal value.
Clockwise, Low Duty Cycle
CounterClockwise, High Duty Cycle
Figure 37. 0.9 V Square Wave Oscillator
Figure 38. Variable Duty Cycle Pulse Generator
cww
相關(guān)PDF資料
PDF描述
NCS2002SN1T1 Sub-One Volt Rail-to-Rail Operational Amplifier with Enable Feature
NCS2002SN2T1 Sub-One Volt Rail-to-Rail Operational Amplifier with Enable Feature
NCV2901 Single Supply Quad Comparators(四電壓比較器)
NCV2902 Single Supply Quad Operational Amplifiers
NCV2902DR2 Single Supply Quad Operational Amplifiers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NCS2002/D 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:NCS2002/D
NCS2002_07 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Sub−One Volt Rail−to−Rail Operational Amplifier with Enable Feature
NCS2002SN1T1 功能描述:運算放大器 - 運放 0.9V Single Rail to RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比(最小值):63 dB 輸入補償電壓:1 mV 輸入偏流(最大值):10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
NCS2002SN1T1G 功能描述:運算放大器 - 運放 0.9V Single Rail to Rail -40 to 105 Cel RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比(最小值):63 dB 輸入補償電壓:1 mV 輸入偏流(最大值):10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
NCS2002SN2T1 功能描述:運算放大器 - 運放 0.9V Single Rail to RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比(最小值):63 dB 輸入補償電壓:1 mV 輸入偏流(最大值):10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel