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參數(shù)資料
| 型號： | LT1221 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 150MHz Operational Amplifier |
| 中文描述： | 150MHz的運算放大器 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 292K |
| 代理商： | LT1221 |
7
LT1221
APPLICATIO
S I
FOR
ATIO
U
offset current have identical specifications. For this reason,
matching the impedance on the inputs to reduce bias
current errors is not necessary.
W
U
U
Capacitive Loading
The LT1221 is stable with capacitive loads. This is accom-
plished by sensing the load induced output pole and adding
compensation at the amplifier gain node. As the capacitive
load increases, both the bandwidth and phase margin
decrease. There will be peaking in the frequency domain as
shown in the curve of Frequency Response vs Capacitive
Load. The small-signal transient response will have more
overshoot as shown in the photo of the small-signal
response with 1000pF load. The large-signal response with
a 10,000pF load shows the output slew rate being limited
to 4V/
μ
s by the short-circuit current. The LT1221 can drive
coaxial cable directly, but for best pulse fidelity a resistor of
value equal to the characteristic impedance of the cable
(i.e., 75
) should be placed in series with the output. The
other end of the cable should be terminated with the same
value resistor to ground.
Compensation
The LT1221 has a typical gain-bandwidth product of
150MHz which allows it to have wide bandwidth in high
gain configurations (i.e., in a gain of 10, it will have a
bandwidth of about 15MHz). The amplifier is stable in a
noise gain of 4 so the ratio of the signal at the inverting input
to the output must be 1/4 or less. Straightforward gain
configurations of 4 or –3 are stable, but there are several
others that allow the amplifier to be stable for lower signal
gains (the noise gain, however, remains 4 or more). One
example is the summing amplifier on the first page of this
data sheet. Each input signal has a gain of –1 to the output,
but it is easily seen that this configuration is equivalent to
a gain of –3 as far as the amplifier is concerned. Another
circuit is shown below with a DC gain of 1, but an AC gain
of 5. The break frequency of the R-C combination across
the amplifier inputs should be approximately a factor of 10
less than the gain-bandwidth of the amplifier divided by the
high frequency gain (in this case 1/10 of 150MHz/5 or
3MHz).
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
Lag Compensation
TYPICAL APPLICATIO
S
N
U
Cable Driver
LT1221 TA04
IN
V
OUT
V
2k
LT1221
–
500
100pF
A
V
= 1, f < 3MHz
+
LT1221 TA03
IN
–
V
1k
LT1221
–
250
200pF
+
LT1221
+
–
250
+
1k
LT1221
–
+
1k
1k
10k
10k
V
OUT
20MHz, A
V
= 50 Instrumentation Amplifier
LT1221 TA05
510
+
–
V
IN
OUT
V
1.5k
75
75
75
CABLE
LT1221
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1221_01 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:150MHz, 250V/ms, A 4 Operational Amplifier |
| LT1221C | 功能描述:PRINTER THERMAL 58MM 24V CUTTER RoHS:否 類別:計算機，辦公室 - 元件，配件 >> 打印機 系列:LT1221 標準包裝:1 系列:Thermomark 類型:臺式熱敏打印機 技術規(guī)格:- 其它名稱:THERMOMARK S1.1THERMOMARKS1.1 |
| LT-1221C | 制造商:Citizen Systems America Corporation 功能描述:Thermal Mechanisms- 58mm - 80 mm/sec - 432 dots - 24V - Clam |
| LT1221CN8 | 功能描述:IC OP-AMP 150MHZ 250V/US 8-DIP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:C-Load™ 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
| LT1221CN8#PBF | 功能描述:IC OP-AMP 150MHZ 250V/US 8-DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:C-Load™ 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT |
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