參數(shù)資料
型號(hào): LT1787HVIS8#PBF
廠商: Linear Technology
文件頁(yè)數(shù): 1/16頁(yè)
文件大小: 0K
描述: IC AMP PREC CURR SENSE HV 8-SOIC
標(biāo)準(zhǔn)包裝: 100
放大器類型: 電流檢測(cè)
電路數(shù): 1
電壓 - 輸入偏移: 40µV
電流 - 電源: 60µA
電流 - 輸出 / 通道: 50µA
電壓 - 電源,單路/雙路(±): 2.5 V ~ 60 V,±1.25 V ~ 30 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: 管件
產(chǎn)品目錄頁(yè)面: 1319 (CN2011-ZH PDF)
1
LT1787/LT1787HV
1787fc
Precision, High Side
Current Sense Amplifiers
Input Offset Voltage: 75
V (Max)
60V Supply Operation (LT1787HV)
12-Bit Dynamic Range
Operating Current: 60
A
User-Selectable External Sense Resistor
Bidirectional High Side Current Sensing
Unidirectional or Bidirectional Output
Input Noise Filtering
–40
°C to 125°C Operating Temperature Range
Available in 8-Lead SO and MSOP Packages
The LT
1787 is a complete micropower precision high
side current sense amplifier. The LT1787 monitors bidi-
rectional currents via the voltage across an external sense
resistor. A current or voltage output indicates the direction
and magnitude of the sense current. The LT1787 delivers
greater than a 12-bit dynamic range with ultralow 40
V
input offset voltage compared to a typical 250mV full-
scale input voltage. A fixed gain of 8 is set by onboard
precision resistors. Input signal filtering is easily imple-
mented with a capacitor between the FILand FIL+ pins.
The LT1787HV operates from 2.5V to 60V total supply
voltage and the LT1787 operates from 2.5V to 36V total
supply voltage. Both versions have a PSRR in excess of
120dB. The LT1787/LT1787HV draw only 60
A and are
available in 8-lead SO and MSOP packages.
Battery Monitoring
Power Monitoring
Portable Phones
Cellular Phones
Portable Test/Measurement Systems
Battery-Operated Systems
Input Offset Voltage vs Supply Voltage
12-Bit Dynamic Resolution Unidirectional Output into LTC
1286 ADC
TOTAL SUPPLY VOLTAGE (V)
0
INPUT
OFFSET
VOLTAGE
(
V)
10
20
30
40
1787 TA01b
50
40
30
20
10
0
–10
–20
–30
–40
–50
60
18
27
36
45
LT1787HV
RSENSE
0.0016
1787 TA01
C1
1
F
5V
FIL+
FIL
R1
15k
C2
0.1
F
VOUT = VBIAS + (8 ILOAD RSENSE)
I = 100A
2.5V TO 60V
TO
LOAD
LT1634-1.25
TO
P
VREF VCC
GND
LTC1286
CS
CLK
DOUT
+IN
–IN
VBIAS
VOUT
ROUT
20k
VS
VS
+
DNC
VEE
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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