- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄363774 > OPA300 Low-Noise, High-Speed, 16-Bit Accurate, CMOS OPERATIONAL AMPLIFIER PDF資料下載
參數(shù)資料
| 型號： | OPA300 |
| 英文描述： | Low-Noise, High-Speed, 16-Bit Accurate, CMOS OPERATIONAL AMPLIFIER |
| 中文描述： | 低噪聲，高速，16位精度，CMOS運算放大器 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大小： | 302K |
| 代理商： | OPA300 |
"##
"#$
SBOS271A MAY 2003 REVISED DECEMBER 2003
www.ti.com
11
DRIVING CAPACITIVE LOADS
When using highspeed operational amplifiers, it is
extremely important to consider the effects of
capacitive loading on amplifier stability. Capacitive
loading will interact with the output impedance of the
operational amplifier, and depending on the capacitor
value, may significantly decrease the gain bandwidth,
as well as introduce peaking. To reduce the effects of
capacitive loading and allow for additional capacitive
load drive, place a series resistor between the output
and the load. This will reduce available bandwidth, but
permit stable operation with capacitive loading.
Figure 3 illustrates the recommended relationship
between the resistor and capacitor values.
Capacitive Load (pF)
1
10
100
100
75
50
25
0
S
)
Figure 3. Recommended R
S
and C
L
Combinations
Amplifiers configured in unity gain are most susceptible
to stability issues. The typical characteristic,
Frequency
Response vs Capacitive Load,
describes the relation-
ship between capacitive load and stability for the
OPA30x. In unity gain, the OPA300 is capable of driving
a few picofarads of capacitive load without compromis-
ing stability. Board level parasitic capacitance can often
fall into the range of a picofarad or more, and should be
minimized through good circuit-board layout practices
to avoid compromising the stability of the OPA30x. For
more information on detecting parasitics during testing,
see the Application Note
Measuring Board Parasitics in
High-Speed Analog Design
(SBOA094), available at
the TI web site www.ti.com.
DRIVING A 16-BIT ADC
The OPA30x features excellent THD+noise, even at
frequencies greater than 1MHz, with a 16-bit settling
time of 150ns. Figure 4 shows a total single supply
solution for high-speed data acquisition. The OPA30x
directly drives the ADS8401, a 1.25 mega sample per
second (MSPS) 16-bit data converter. The OPA30x is
configured in an inverting gain of 1, with a 5V single
supply. Results of the OPA30x performance are
summarized in Table 1.
ADS8401
10
V
IN
1.5nF
130pF
(mica)
OPA30x
1820
f
S
= 1.25MSPS
f = 10kHz
5V
130pF
(mica)
1820
Figure 4. The OPA30x Drives the 16-Bit ADS8401
PARAMETER
RESULTS (f = 10kHz)
THD
99.3dB
SFDR
101.2dB
THD+N
84.2dB
SNR
84.3dB
Table 1. OPA30x Performance Results Driving a
1.25MSPS ADS8401
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| OPA300AID | Low-Noise, High-Speed, 16-Bit Accurate, CMOS OPERATIONAL AMPLIFIER |
| OPA300AIDBVR | Low-Noise, High-Speed, 16-Bit Accurate, CMOS OPERATIONAL AMPLIFIER |
| OPA300AIDBVT | Low-Noise, High-Speed, 16-Bit Accurate, CMOS OPERATIONAL AMPLIFIER |
| OPA300AIDR | Low-Noise, High-Speed, 16-Bit Accurate, CMOS OPERATIONAL AMPLIFIER |
| OPA301 | Low-Noise, High-Speed, 16-Bit Accurate, CMOS OPERATIONAL AMPLIFIER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA300AID | 功能描述:運算放大器 - 運放 Hi-Speed Low Noise Single Supply CMOS 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(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 |
| OPA300AID | 制造商:Texas Instruments 功能描述:SEMICONDUCTOR ((NW)) |
| OPA300AIDBVR | 功能描述:運算放大器 - 運放 Hi-Speed Low Noise Single Supply CMOS 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(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 |
| OPA300AIDBVRG4 | 功能描述:運算放大器 - 運放 Hi-Speed Low Noise Single Supply CMOS 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(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 |
| OPA300AIDBVT | 功能描述:運算放大器 - 運放 Hi-Speed Low Noise Single Supply CMOS 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(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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。