參數(shù)資料
型號(hào): LT1190CS8
廠商: Linear Technology
文件頁(yè)數(shù): 11/12頁(yè)
文件大?。?/td> 0K
描述: IC OP-AMP VIDEO HISPD SNGL 8SOIC
標(biāo)準(zhǔn)包裝: 100
應(yīng)用: 通用
電路數(shù): 1
轉(zhuǎn)換速率: 450 V/µs
電流 - 電源: 32mA
電流 - 輸出 / 通道: 50mA
電壓 - 電源,單路/雙路(±): 4.75 V ~ 16 V,±2.38 V ~ 8 V
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOIC
包裝: 管件
8
LT1190
In most applications, and those requiring good settling
time, it is important to use multiple bypass capacitors. A
0.1
F ceramic disc in parallel with a 4.7F tantalum is
recommended. Two oscilloscope photos with different
bypass conditions are used to illustrate the settling time
characteristics of the amplifier. Note that although the
output waveform looks acceptable at 1V/DIV, when ampli-
fied to 1mV/DIV the settling time to 2mV is 4.244
s for the
0.1
F bypass; the time drops to 163ns with multiple
bypass capacitors.
Power Supply Bypassing
The LT1190 is quite tolerant of power supply bypassing.
In some applications a 0.1
F ceramic disc capacitor
placed 1/2 inch from the amplifier is all that is required. A
scope photo of the amplifier output with no supply
bypassing is used to demonstrate this bypassing toler-
ance, RL = 1k.
Supply bypassing can also affect the response in the
frequency domain. It is possible to see a slight 1dB rise in
the frequency response at 130MHz depending on the gain
configuration, supply bypass, inductance in the supply
leads and printed circuit board layout. This can be further
minimized by not using a socket.
Closed-Loop Voltage Gain vs Frequency
Settling Time Good Bypass
Settling Time Poor Bypass
No Supply Bypass Capacitors
APPLICATIO S I FOR ATIO
WU
UU
FREQUENCY (Hz)
CLOSED-LOOP
VOLTAGE
GAIN
(dB)
20
10
0
–10
–20
1G
LT1190 TA05
100M
10M
1M
100k
VS = ±5V
TA = 25°C
RL = 1k
AV = 2
AV = 1
LT1190 TA04
AV = –1, IN DEMO BOARD, RL = 1k
LT1190 TA06
SETTLING TIME TO 2mV, AV = –1
SUPPLY BYPASS CAPACITORS = 0.1
F
LT1190 TA07
SETTLING TIME TO 2mV, AV = –1
SUPPLY BYPASS CAPACITORS = 0.1
F + 4.7F TANTALUM
VOUT
1V/DIV
VOUT
1mV/DIV
0V
VOUT
1V/DIV
VOUT
1mV/DIV
0V
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