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參數(shù)資料
| 型號： | LT1189CS8#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP VIDEO DIFFRNC ADJ 8-SOIC |
| 標準包裝： | 100 |
| 應(yīng)用： | 差分 |
| 電路數(shù)： | 1 |
| -3db帶寬： | 35MHz |
| 轉(zhuǎn)換速率： | 220 V/µs |
| 電流 - 電源： | 13mA |
| 電流 - 輸出 / 通道： | 20mA |
| 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 |
LT1189
10
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
Small-Signal Transient Response
Closed-Loop Voltage Gain vs Frequency
AV = 4, RFB = 910, RG = 300
LT1189 AI07
AV = 4, RFB = 910, RG = 300, CFB = 5pF
LT1189 AI08
Small-Signal Transient Response
Reducing the Closed-Loop Bandwidth
Although it is possible to reduce the closed-loop band-
width by using a feedback zero, instability can occur if the
bandwidth is made too low. An alternate technique is to do
differential filtering at the input of the amplifier. This
technique filters the differential input signal, and the
differential noise, but does not filter common-mode noise.
Common-mode noise is rejected by the LT1189’s CMRR.
10MHz Bandwidth Limited Amplifier
Using the Shutdown Feature
The LT1189 has a unique feature that allows the amplifier
to be shutdown for conserving power, or for multiplexing
several amplifiers onto a common cable. The amplifier will
shutdown by taking pin 5 to V–. In shutdown, the amplifier
dissipates 15mW while maintaining a true high impedance
output state of about 20k
in parallel with the feedback
resistors. For MUX applications, the amplifiers may be
configured inverting, non-inverting, or differential. When
the output is loaded with as little as 1k
fromtheamplifier’s
feedback resistors, the amplifier shuts off in 600ns. This
shutoff can be under the control of HC CMOS operating
between 0V and – 5V.
FREQUENCY (Hz)
CLOSED-LOOP
VOLTAGE
GAIN
(dB)
30
LT1189 AI06
100M
10M
1M
100k
20
10
–20
–10
0
VS = ±5V
TA = 25°C
AV = 4
RFB = 900
RG = 300
CFB = 5pF
CFB = 0pF
LT1189 AI09
5V
7
6
LT1189
–5V
4
+
REF
3
1
–
FB
2
8
VOUT
909
R1
110
R2
110
C1
68pF
AV = 10
f–3dB =
2
π(R1 + R2)C1
1
VOUT =
FILTER
SIG + eND +
CMR
eNCM
eND
SIG
eNCM
100
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