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參數(shù)資料
| 型號(hào)： | LT1970CFE |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | 500mA Power Op Amp with Adjustable Precision Current Limit |
| 中文描述： | OP-AMP, 1000 uV OFFSET-MAX, 3.6 MHz BAND WIDTH, PDSO20 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-20 |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大小： | 233K |
| 代理商： | LT1970CFE |
7
LT1970
1970f
PIU
V
EE
(Pins 1, 10, 11, 20, Package Base):
Minus Supply
Voltage. V
EE
connects to the substrate of the integrated
circuit die, and therefore must always be the most negative
voltage applied to the part. Decouple V
EE
to ground with a
low ESR capacitor. V
EE
may be a negative voltage or it may
equal ground potential. Any or all of the V
EE
pins may be
used. Unused V
EE
pins must remain open.
V
–
(Pin 2):
Output Stage Negative Supply. V
–
may equal
V
EE
or may be smaller in magnitude. Only output stage
current flows out of V
–
, all other current flows out of V
EE
.
V
–
may be used to drive the base/gate of an external power
device to boost the amplifier’s output current to levels
above the rated 500mA of the on-chip output devices.
Unless used to drive boost transistors, V
–
should be
decoupled to ground with a low ESR capacitor.
OUT (Pin 3):
Amplifier Output. The OUT pin provides the
force function as part of a Kelvin sensed load connection.
OUT is normally connected directly to an external load
current sense resistor and the SENSE
+
pin. Amplifier
feedback is directly connected to the load and the other
end of the current sense resistor. The load connection is
also wired directly to the SENSE
–
pin to monitor the load
current.
The OUT pin is current limited to
±
800mA typical. This
current limit protects the output transistor in the event
that connections to the external sense resistor are opened
or shorted which disables the precision current limit
function.
SENSE
+
(Pin 4):
Positive Current Sense Pin. This lead is
normally connected to the driven end of the external sense
resistor. Positive current limit operation is activated when
the voltage V
SENSE
(V
SENSE
+ – V
SENSE
–) equals 1/10 of
the programming control voltage at VC
SRC
(Pin 13). Nega-
tive current limit operation is activated when the voltage
V
SENSE
equals –1/10 of the programming control voltage
at VC
SNK
(Pin 12).
FILTER (Pin 5):
Current Sense Filter Pin. This pin is
normally not used and should be left open in most appli-
cations. When very large capacitive loads are driven, a
filter capacitor connected between FILTER and SENSE
+
will reduce overshoot as the amplifier enters current
limiting mode. The filter time constant is set by an internal
1k resistor and the external filter capacitor. Capacitor
values of 1nF to 100nF are most effective at reducing
overshoot.
SENSE
–
(Pin 6):
Negative Current Sense Pin. This pin is
normally connected to the load end of the external sense
resistor.
Positive current limit operation is activated when
the voltage V
SENSE
(V
SENSE
+ – V
SENSE
–) equals 1/10 of
the programming control voltage at VC
SRC
(Pin 13).
Negative current limit operation is activated when the
voltage V
SENSE
equals –1/10 of the programming control
voltage at VC
SNK
(Pin 12).
V
CC
(Pin 7):
Positive Supply Voltage. All circuitry except
the output transistors draw power from V
CC
. Total supply
voltage from V
CC
to V
EE
must be between 3.5V and 36V.
V
CC
must always be greater than or equal to V
+
. V
CC
should
always be decoupled to ground with a low ESR capacitor.
–IN (Pin 8):
Inverting Input of Amplifier. –IN may be any
voltage from V
EE
– 0.3V to V
EE
+ 36V. –IN and +IN remain
high impedance at all times to prevent current flow into the
inputs when current limit mode is active. Care must be
taken to insure that –IN or +IN can never go to a voltage
below V
EE
– 0.3V even during transient conditions or
damage to the circuit may result. A Schottky diode from
V
EE
to –IN can provide clamping if other elements in the
circuit can allow –IN to go below V
EE
.
+IN (Pin 9):
Noninverting Input of Amplifier. +IN may be
any voltage from V
EE
– 0.3V to V
EE
+ 36V. –IN and +IN
remain high impedance at all times to prevent current flow
into the inputs when current limit mode is active. Care
must be taken to insure that –IN or +IN can never go to a
voltage below V
EE
– 0.3V even during transient conditions
or damage to the circuit may result. A Schottky diode from
V
EE
to +IN can provide clamping if other elements in the
circuit can allow +IN to go below V
EE
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1970CFE#PBF | 功能描述:IC OPAMP ADJ CURR LIMIT 20-TSSOP 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):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 |
| LT1970CFE#PBF | 制造商:Linear Technology 功能描述:OP AMP 500MA CURR LIMIT 20TSSOP |
| LT1970CFE#TR | 功能描述:IC OPAMP ADJ CURR LIMIT 20-TSSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件 |
| LT1970CFE#TRPBF | 功能描述:IC OPAMP ADJ CURR LIMIT 20-TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:J-FET 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:3.5 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:30pA 電壓 - 輸入偏移:2000µV 電流 - 電源:200µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):7 V ~ 36 V，±3.5 V ~ 18 V 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 供應(yīng)商設(shè)備封裝:8-PDIP 包裝:管件 |
| LT1970CFEPBF | 制造商:Linear Technology 功能描述:LT1970 500mA adj CL power TSSOP op amp |
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