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參數(shù)資料
| 型號(hào)： | LT1352CN8 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Octal Buffers And Line Drivers With 3-State Outputs 20-SSOP 0 to 70 |
| 中文描述： | DUAL OP-AMP, 800 uV OFFSET-MAX, 2.7 MHz BAND WIDTH, PDIP8 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-8 |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大?。?/td> | 325K |
| 代理商： | LT1352CN8 |
10
LT1352/LT1353
APPLICATIO
S I
FOR
ATIO
U
mended for applications where DC accuracy must be
maximized. The inputs can withstand differential input
voltages of up to 10V without damage and need no
clamping or source resistance for protection. Differential
inputs generate large supply currents (up to 40mA) as
required for high slew rates. Typically power dissipation
does not significantly increase because of the low duty
cycle of the transient inputs. If the device is used as a
comparator with sustained differential inputs, excessive
power dissipation may result.
W
U
U
Circuit Operation
The LT1352/LT1353 circuit topology is a true voltage
feedback amplifier that has the slewing behavior of a
current feedback amplifier. The operation of the circuit can
be understood by referring to the Simplified Schematic.
The inputs are buffered by complementary NPN and PNP
emitter followers which drive R1, a 1k resistor. The input
voltage appears across the resistor generating currents
which are mirrored into the high impedance node and
compensation capacitor C
T
. Complementary followers
form an output stage which buffers the gain node from the
load. The output devices Q19 and Q22 are connected to
form a composite PNP and a composite NPN.
The bandwidth is set by the input resistor and the capaci-
tance on the high impedance node. The slew rate is
determined by the current available to charge the high
impedance node capacitance. This current is the differen-
tial 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. For example, a 10V
output step in a gain of 10 has only a 1V input step whereas
the same output step in unity gain has a 10 times greater
input step. The graph Slew Rate vs Input Level illustrates
this relationship. In higher gain configurations the large-
signal performance and the small-signal performance
both look like a single pole response.
Capacitive load compensation is provided by the R
C
,
C
C
network which is bootstrapped across the output stage.
When the amplifier is driving a light load the network has
no effect. When driving a capacitive load (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
and a zero is created by the RC combination, both of which
improve the phase margin. The design ensures that even
for very large load capacitances, the total phase lag can
never exceed 180 degrees (zero phase margin) and the
amplifier remains stable.
Power Dissipation
The LT1352/LT1353 combine high speed and large output
drive in small packages. Because of the wide supply
voltage range, it is possible to exceed the maximum
junction temperature of 150
°
C under certain conditions.
Maximum junction temperature T
J
is calculated from the
ambient temperature T
A
and power dissipation P
D
as
follows:
LT1352CN8: T
J
= T
A
+ (P
D
)(130
°
C/W)
LT1352CS8: T
J
= T
A
+ (P
D
)(190
°
C/W)
LT1353CS:
T
J
= T
A
+ (P
D
)(150
°
C/W)
Worst-case power dissipation occurs at the maximum
supply current and when the output voltage is at 1/2 of
either supply voltage (or the maximum swing if less than
1/2 supply voltage). For each amplifier P
D(MAX)
is:
P
D(MAX)
=(V
+
– V
–
)(I
S(MAX)
) + (V
+
/2)
2
/R
L
or
(V
+
– V
–
)(I
S(MAX)
) + (V
+
– V
MAX
)(I
MAX
)
Example: LT1353 in S14 at 85
°
C, V
S
=
±
15V, R
L
= 500
,
V
OUT
=
±
5V (
±
10mA)
P
D(MAX)
= (30V)(380
μ
A) + (15V – 5V)(10mA) = 111mW
T
J
= 85
°
C + (4)(111mW)(150
°
C/W) = 152
°
C
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1352CS8 | Octal Buffers And Line Drivers With 3-State Outputs 20-SSOP 0 to 70 |
| LT1353 | Octal Buffers And Line Drivers With 3-State Outputs 20-SOIC 0 to 70 |
| LT1358CN8 | Dual and Quad 25MHz, 600V/us Op Amps |
| LT1358 | OCTAL BUFFERS AND LINE DRIVERS 20-SSOP 0 to 70 |
| LT1358CS8 | OCTAL BUFFERS AND LINE DRIVERS 20-SSOP 0 to 70 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1352CN8#PBF | 功能描述:IC OP-AMP HI-SPD 3MHZ DUAL 8-DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:C-Load™ 標(biāo)準(zhǔn)包裝:73 系列:Over-The-Top® 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.07 V/µs 增益帶寬積:200kHz -3db帶寬:- 電流 - 輸入偏壓:1nA 電壓 - 輸入偏移:285µV 電流 - 電源:50µA 電流 - 輸出 / 通道:25mA 電壓 - 電源，單路/雙路(±):2 V ~ 44 V，±1 V ~ 22 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:16-DFN-EP（5x3） 包裝:管件 |
| LT1352CS8 | 制造商:Linear Technology 功能描述:SC-Amps/Industrial, Dual 250 uA 3MHz 200V/us OA 制造商:Linear Technology 功能描述:Operational Amplifier, Dual AMP, Bipolar, 8 Pin, Plastic, SOP |
| LT1352CS8#PBF | 功能描述:IC OP-AMP HI-SPD 3MHZ DUAL 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:C-Load™ 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| LT1352CS8#TR | 功能描述:IC OPAMP DUAL 3MHZ HI SPD 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:C-Load™ 標(biāo)準(zhǔn)包裝:73 系列:Over-The-Top® 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.07 V/µs 增益帶寬積:200kHz -3db帶寬:- 電流 - 輸入偏壓:1nA 電壓 - 輸入偏移:285µV 電流 - 電源:50µA 電流 - 輸出 / 通道:25mA 電壓 - 電源，單路/雙路(±):2 V ~ 44 V，±1 V ~ 22 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:16-DFN-EP（5x3） 包裝:管件 |
| LT1352CS8#TRPBF | 功能描述:IC OP-AMP HI-SPD 3MHZ DUAL 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:C-Load™ 標(biāo)準(zhǔn)包裝:73 系列:Over-The-Top® 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.07 V/µs 增益帶寬積:200kHz -3db帶寬:- 電流 - 輸入偏壓:1nA 電壓 - 輸入偏移:285µV 電流 - 電源:50µA 電流 - 輸出 / 通道:25mA 電壓 - 電源，單路/雙路(±):2 V ~ 44 V，±1 V ~ 22 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:16-DFN-EP（5x3） 包裝:管件 |
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