參數(shù)資料
型號(hào)： LT1969CMS#TR
廠商： Linear Technology
文件頁(yè)數(shù)： 4/20頁(yè)
文件大小： 0K
描述： IC OP-AMP ADJ CURRNT DUAL 10MSOP
標(biāo)準(zhǔn)包裝： 2,500
放大器類(lèi)型： 通用
電路數(shù)： 2
轉(zhuǎn)換速率： 200 V/µs
增益帶寬積： 700MHz
電流 - 輸入偏壓： 1.5µA
電壓 - 輸入偏移： 1000µV
電流 - 電源： 7mA
電流 - 輸出 / 通道： 700mA
電壓 - 電源，單路/雙路(±)： 4 V ~ 13 V，±2 V ~ 6.5 V
工作溫度： 0°C ~ 70°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 10-MSOP
包裝： 帶卷 (TR)
其它名稱(chēng)： LT1969CMSTR
12
LT1969
Capacitive Loading
The LT1969 is stable with a 1000pF capacitive load. The
photo of the small-signal response with 1000pF load in a
gain of 10 shows 50% overshoot. The photo of the large-
signal response with a 1000pF load shows that the output
slew rate is not limited by the short-circuit current. The
Typical Performance Curve of Frequency Response vs
Capacitive Load shows the peaking for various capacitive
loads.
This stability is useful in the case of directly driving a
coaxial cable or twisted pair that is inadvertently
unterminated. For best pulse fidelity, however, a termina-
tion resistor of value equal to the characteristic impedance
of the cable or twisted pair (i.e., 50
/75/100/135)
should be placed in series with the output. The other end
of the cable or twisted pair should be terminated with the
same value resistor to ground.
APPLICATIO S I FOR ATIO
WU
UU
Figure 2. Compensation for Inverting Gains
RG
RC
Vo
Vi
CC
(OPTIONAL)
–
+
1969 F02
RF
=
–RF
RG
Vo
Vi
< 15MHz
1
2
πRCCC
(RC || RG) ≤ RF/9
Figure 3. Compensation for Noninverting Gains
RC
Vo
Vi
CC
(OPTIONAL)
+
–
1969 F03
RF
RG
= 1 +
RF
RG
Vo
Vi
< 15MHz
1
2
πRCCC
(RC || RG) ≤ RF/9
Compensation
The LT1969 is stable in a gain 10 or higher for any supply
and resistive load. It is easily compensated for lower gains
with a single resistor or a resistor plus a capacitor.
Figure 2 shows that for inverting gains, a resistor from the
inverting node to AC ground guarantees stability if the
parallel combination of RC and RG is less than or equal to
RF/9. For lowest distortion and DC output offset, a series
capacitor, CC, can be used to reduce the noise gain at lower
frequencies. The break frequency produced by RC and CC
should be less than 15MHz to minimize peaking. The
Typical Curve of Frequency Response vs Supply Voltage,
AV = –1 shows less than 1dB of peaking for a break
frequency of 12.8MHz.
Figure 3 shows compensation in the noninverting configu-
ration. The RC, CC network acts similarly to the inverting
case. The input impedance is not reduced because the
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