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參數(shù)資料
| 型號(hào)： | LT1812CS6 |
| 元件分類： | 運(yùn)算放大器 |
| 英文描述： | Operational Amplifier |
| 中文描述： | 運(yùn)算放大器 |
| 文件頁(yè)數(shù)： | 11/12頁(yè) |
| 文件大小： | 246K |
| 代理商： | LT1812CS6 |
11
LT1813
APPLICATIO
S I
FOR
ATIO
U
Example: LT1813 in SO-8 at 70
°
C, V
S
=
±
5V, R
L
= 100
P
DMAX
= (10V)(4.5mA) + (2.5V)
2
/100
= 108mW
T
JMAX
= 70
°
C + (2 108mW)(150
°
C/W) = 102
°
C
W
U
U
Circuit Operation
The LT1813 circuit topology is a true voltage feedback
amplifier that has the slewing behavior of a current feed-
back amplifier. The operation of the circuit can be under-
stood by referring to the Simplified Schematic. The inputs
are buffered by complementary NPN and PNP emitter
followers which drive a 300
resistor. The input voltage
appears across the resistor generating currents that are
mirrored into the high impedance node.
Complementary followers form an output stage that buff-
ers the gain node from the load. The bandwidth is set by
the input resistor and the capacitance on the high imped-
ance node. The slew rate is determined by the current
available to charge the gain node capacitance. This current
is the differential input voltage divided by R1, so the slew
rate is proportional to the input. Highest slew rates are
therefore seen in the lowest gain configurations.
The RC network across the output stage is bootstrapped
when the amplifier is driving a light or moderate load and
has no effect under normal operation. When driving ca-
pacitive loads (or a low value resistive load) the network is
incompletely bootstrapped and adds to the compensation
at the high impedance node. The added capacitance slows
down the amplifier which improves the phase margin by
moving the unity-gain cross away from the pole formed by
the output impedance and the capacitive load. The zero
created by the RC combination adds phase to ensure that
the total phase lag does not exceed 180 degrees (zero
phase margin) and the amplifier remains stable. In this
way, the LT1813 is stable with up to 1000pF capacitive
loads in unity gain, and even higher capacitive loads in
higher closed-loop gain configurations.
1813 SS
OUT
+IN
–IN
V
+
V
–
R1
300
C
C
R
C
C
SCHE
ATIC
W
SW
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1812CS6#PBF | 制造商:Linear Technology 功能描述:SC-Amps/High Speed, Cut Tape 3MA Hi Speed OA w/Shutdown in SOT-23 6 |
| LT1812CS6#TR | 功能描述:IC OPAMP 3MA HS SHUTDOWN SOT23-6 RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 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-SO 包裝:帶卷 (TR) |
| LT1812CS6#TRM | 功能描述:IC OPAMP R-R W/SHUTDOWN SOT23-6 RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 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-SO 包裝:帶卷 (TR) |
| LT1812CS6#TRMPBF | 功能描述:IC OPAMP R-R W/SHUTDOWN SOT23-6 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 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-SO 包裝:帶卷 (TR) |
| LT1812CS6#TRPBF | 功能描述:IC OPAMP R-R W/SHUTDOWN SOT23-6 RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 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-SO 包裝:帶卷 (TR) |
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