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參數(shù)資料
| 型號： | LT1192CS8#TR |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 12/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP VID SGL HI SPEED 8SOIC |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 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： | 帶卷 (TR) |
9
LT1192
Closed-Loop Voltage Gain vs Frequency
Small-Signal Transient Response
Output Shutdown
FREQUENCY (Hz)
CLOSED-LOOP
VOLTAGE
GAIN
(dB)
24
1G
LT1192 TA10
100M
10M
1M
100k
AV = 10
AV = 5
22
20
18
16
14
12
10
APPLICATIO S I FOR ATIO
WU
UU
LT1192 TA08
1MHz SINE WAVE GATED OFF WITH
SHUTDOWN PIN, AV = 10, RL = 1k
LT1192 TA09
AV = 10, SMALL-SIGNAL RISE TIME, WITH FET PROBES
VOUT
–5V
0V
VSHDN
The ability to maintain shutoff is shown on the curve
Shutdown Supply Current vs Temperature in the Typical
Performance Characteristics section. At very high
elevated temperatures it is important to hold the SHDN pin
close to the negative supply to keep the supply current
from increasing.
Operating with Low Closed-Loop Gains
When using decompensated amplifiers it should be real-
ized that peaking in the frequency domain, and overshoot
and ringing in the time domain occur as closed-loop gain
is lowered. The LT1192 is stable to a closed-loop gain of
5, however, peaking and ringing can be minimized by
increasing the closed-loop gain. For instance, the LT1192
peaks 5dB when used in a gain of 5, but peaks by less than
0.5dB for a closed-loop gain of 10. Likewise, the overshoot
drops from 50% to 4% for gains of 10.
Murphy Circuits
There are several precautions the user should take when
using the LT1192 in order to realize its full capability.
Although the LT1192 can drive a 50pF load, isolating the
capacitance with 20
can be helpful. Precautions prima-
rily have to do with driving large capacitive loads.
Other precautions include:
1. Use a ground plane (see Design Note 50, High Fre-
quency Amplifier Evaluation Board).
2. Do not use high source impedances. The input capaci-
tance of 2pF, and RS = 10k for instance, will give an
8MHz – 3dB bandwidth.
3. PC board socket may reduce stability.
4. A feedback resistor of 1k or lower reduces the effects of
stray capacitance at the inverting input.
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