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參數資料
| 型號： | LT1638 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 1.2MHz, 0.4V/μs Over-The-TopTM Micropower Rail-to-Rail Input and Output Op Amps(1.2MHz, 0.4V/μs，微功耗雙路滿幅度輸入和輸出運算放大器) |
| 中文描述： | 1.2MHz的，0.4V/μs的Over - The - TopTM微軌到軌輸入和輸出運算放大器（1.2MHz的，0.4V/μs，微功耗雙路滿幅度輸入和輸出運算放大器） |
| 文件頁數： | 9/12頁 |
| 文件大小： | 198K |
| 代理商： | LT1638 |
9
LT1638/LT1639
APPLICATIO
S I
FOR
ATIO
U
Gain
The open-loop gain is almost independent of load when
the output is sourcing current. This optimizes perfor-
W
U
U
TYPICAL APPLICATIO
N
S
With 1.2MHz bandwidth, Over-The-Top capability, re-
verse-battery protection and rail-to-rail input and output
features, the LT1638/LT1639 are ideal candidates for
general purpose applications.
The lowpass slope limiting filter in Figure 1 limits the
maximum dV/dT (not frequency) that it passes. When the
input signal differs from the output by one forward diode
drop, D1 or D2 will turn on. With a diode on, the voltage
across R2 will be constant and a fixed current, V
DIODE
/R2,
will flow through capacitor C1, charging it linearly instead
of exponentially. The maximum slope that the circuit will
pass is equal to V
DIODE
divided by (R2)(C1). No matter
how fast the input changes the output will never change
any faster than the dV/dT set by the diodes and (R2)(C).
–
+
–
+
1/4 LT1639
–
+
1/4 LT1639
1/4 LT1639
D1
D2
V
CC
C1
V
OUT
V
EE
V
IN
R5
100k
R6
100k
1638/39 F02
LT1634-1.2V
R3
100k
R4
100k
R2
R1
1k
D3
D4
LT1634-1.2V
FOR R2 = 50k, C1 = 500pF,
MAXIMUM SLOPE = 0.048V/
μ
s
d
dt
(R2)(C1)
V
OUT
=
1.2V
mance in single supply applications where the load is
returned to ground. The typical performance curve of
Open-Loop Gain for various loads shows the details.
V
OUT
V
IN
Response of Slope Limiting Filter
Figure 2. Lowpass Slope Limiting Filter with 0TC
–
+
1/2 LT1638
C1
V
OUT
1638/39 F01
R2
D2
D1
R1
V
IN
FOR R1 = 10k, R2 = 100k, C1 = 1000pF
d
dt
V
OUT(MAX)
=
d
dt
V
D
(R2)(C1)
V
OUT(MAX)
= 0.006V/
μ
s
A modification of this application is shown in Figure 2
using references instead of diodes to set the maximum
slope. By using references, the slope is independent of
temperature. A scope photo shows a 1V
P-P
, 2kHz input
signal with a 2V pulse added to the sine wave; the circuit
passes the 2kHz signal but limits the slope of the pulse.
The application in Figure 3 utilizes the Over-The-Top
capabilities of the LT1638. The 0.2
resistor senses the
load current while the op amp and NPN transistor form a
closed loop making the collector current of Q1
Figure 1. Lowpass Slope Limiting Filter
1638/39 TA02
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PDF描述 |
|---|---|
| LT1639 | 1.2MHz, 0.4V/μs Over-The-TopTM Micropower Rail-to-Rail Input and Output Op Amps(1.2MHz, 0.4V/μs，微功耗四路滿幅度輸入和輸出運算放大器) |
| LT1640H | Negative Voltage Hot Swap Controller(負電壓熱交換控制器) |
| LT1640L | Negative Voltage Hot Swap Controller(負電壓熱交換控制器) |
| LT1640 | Negative Voltage Hot Swap Controller |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LT1638_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.2MHz, 0.4V/μs Over-The-Top Micropower Rail-to-Rail Input and Output Op Amps |
| LT1638CDD | 功能描述:IC OPAMP R-R IN/OUT DUAL 8DFN RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 其它有關文件:Automotive Product Guide 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:通用 電路數:1 輸出類型:滿擺幅 轉換速率:3 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:1pA 電壓 - 輸入偏移:70µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:Digi-Reel® 其它名稱:MAX4475AUT#TG16DKR |
| LT1638CDD#PBF | 功能描述:IC OPAMP R-R IN/OUT DUAL 8DFN RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 標準包裝:1 系列:MicroAmplifier™ 放大器類型:通用 電路數:4 輸出類型:- 轉換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:5pA 電壓 - 輸入偏移:1500µV 電流 - 電源:220µA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 36 V，±2.25 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SOIC 包裝:剪切帶 (CT) 其它名稱:296-29363-1 |
| LT1638CDD#TR | 功能描述:IC OP AMP 1.2MHZ R-R IN/OUT 8DFN RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:電流檢測 電路數:1 輸出類型:- 轉換速率:- 增益帶寬積:125kHz -3db帶寬:- 電流 - 輸入偏壓:- 電壓 - 輸入偏移:100µV 電流 - 電源:1.1µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:4-WFBGA，CSPBGA 供應商設備封裝:4-UCSP（2x2） 包裝:剪切帶 (CT) 其它名稱:MAX9634WERS+TCT |
| LT1638CDD#TRPBF | 功能描述:IC OPAMP R-R IN/OUT DUAL 8DFN RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:Over-The-Top® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:電流檢測 電路數:1 輸出類型:- 轉換速率:- 增益帶寬積:125kHz -3db帶寬:- 電流 - 輸入偏壓:- 電壓 - 輸入偏移:100µV 電流 - 電源:1.1µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:4-WFBGA，CSPBGA 供應商設備封裝:4-UCSP（2x2） 包裝:剪切帶 (CT) 其它名稱:MAX9634WERS+TCT |
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