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參數(shù)資料
| 型號： | NCS2002SN2T1 |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 2/16頁 |
| 文件大小： | 0K |
| 描述： | IC OPAMP ENABLE R/R 1V 6TSOP |
| 產(chǎn)品變化通告： | Product Obsolescence 11/Feb/2009 |
| 標準包裝： | 1 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 1 |
| 輸出類型： | 滿擺幅 |
| 轉換速率： | 1.3 V/µs |
| 增益帶寬積： | 900kHz |
| 電流 - 輸入偏壓： | 10pA |
| 電壓 - 輸入偏移： | 500µV |
| 電流 - 電源： | 820µA |
| 電流 - 輸出 / 通道： | 128mA |
| 電壓 - 電源，單路/雙路(±)： | 0.9 V ~ 7 V，±0.45 V ~ 3.5 V |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SC-74，SOT-457 |
| 供應商設備封裝： | 6-TSOP |
| 包裝： | 剪切帶 (CT) |
| 其它名稱： | NCS2002SN2T1OSCT |
NCS2002, NCV2002
http://onsemi.com
10
0
±0.5
VS, SUPPLY VOLTAGE (V)
±1.0
±1.5
±2.0
±2.5
4.0
6.0
0
2.0
8.0
10
Figure 32. Propagation Delay versus Supply Voltage
RL = 10 k
TA = 25°C
Propagation
Delay
(m
S)
±3.0
±3.5
12
14
16
ton
toff
APPLICATION INFORMATION AND OPERATING DESCRIPTION
GENERAL INFORMATION
The NCS2002 is an industry first railtorail input,
railtorail output amplifier that features guaranteed sub
one volt operation. This unique feature set is achieved with
the use of a modified analog CMOS process that allows the
implementation of depletion MOSFET devices. The
amplifier has a 1.0 MHz gain bandwidth product, 1.2 V/
ms
slew rate and is operational over a power supply range less
than 0.9 V to as high as 7.0 V.
Inputs
The input topology chosen for this device series is
unconventional when compared to most low voltage
operational amplifiers. It consists of an Nchannel depletion
mode differential transistor pair that drives a folded cascade
stage and current mirror. This configuration extends the
input common mode voltage range to encompass the VEE
and VCC power supply rails, even when powered from a
combined total of less than 0.9 volts. Figures 27, 28 and 29
show the input common mode voltage range versus power
supply voltage.
The differential input stage is laser trimmed in order to
minimize offset voltage. The Nchannel depletion mode
MOSFET input stage exhibits an extremely low input bias
current of less than 10 pA. The input bias current versus
temperature is shown in Figure 4. Either one or both inputs
can be biased as low as VEE minus 300 mV to as high as
7.0 V without causing damage to the device. If the input
common mode voltage range is exceeded, the output will not
display a phase reversal. If the maximum input positive or
negative voltage ratings are to be exceeded, a series resistor
must be used to limit the input current to less than 2.0 mA.
The ultra low input bias current of the NCS2002 allows
the use of extremely high value source and feedback resistor
without reducing the amplifier’s gain accuracy. These high
value resistors, in conjunction with the device input and
printed circuit board parasitic capacitances Cin, will add an
additional pole to the single pole amplifier in Figure 33. If
low enough in frequency, this additional pole can reduce the
phase margin and significantly increase the output settling
time. The effects of Cin, can be canceled by placing a zero
into the feedback loop. This is accomplished with the
addition of capacitor Cfb. An approximate value for Cfb can
be calculated by:
Cfb +
Rin
Cin
Rfb
Figure 33. Input Capacitance Pole Cancellation
+
-
Output
Rfb
Cin
Rin
Cfb
Cin = Input and printed circuit board capacitance
Input
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| NCS2002SN2T1G | 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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