參數(shù)資料
型號: LT1787CMS8
廠商: LINEAR TECHNOLOGY CORP
元件分類: 模擬信號調(diào)理
英文描述: Precision, High Side Current Sense Amplifiers
中文描述: SPECIALTY ANALOG CIRCUIT, PDSO8
封裝: PLASTIC, MSOP-8
文件頁數(shù): 10/12頁
文件大?。?/td> 205K
代理商: LT1787CMS8
10
LT1787/LT1787HV
Figure 8. Unidirectional Current Sensing Mode
Figure 7. Single Supply 2.5V Bidirectional Operation
with External Voltage Reference and I/V Converter
2.5V
C1
1
μ
F
R
SENSE
I
SENSE
2.5V + V
SENSE(MAX)
TO
CHARGER/
LOAD
V
OUT A
1M
5%
1787 F07
LT1495
C3
1000pF
LT1389-1.25
2.5V
+
A1
1
2
3
4
8
7
6
5
LT1787
FIL
+
V
S+
FIL
V
S–
V
BIAS
V
OUT
DNC
V
EE
R
OUT
1787 F08
C
0.1
μ
F
R
SENSE
2.5V TO
60V
V
OUT
TO
LOAD
1
2
3
4
8
7
6
5
LT1787HV
FIL
+
V
S+
FIL
V
S–
V
BIAS
V
OUT
DNC
V
EE
R
OUT
V
S+
– V
S–
(V)
0
O
0.30
0.25
0.20
0.15
0.10
0.05
0
0.005 0.010
IDEAL
0.015 0.020
1787 F09
0.025 0.030
Figure 9. Expanded Scale of Unidirectional Output
Buffered Output Operation
Figure 7 shows the LT1787’s outputs buffered by an
operational amplifier configured as an I/V converter. This
configuration is ideal for monitoring very low voltage
supplies. The LT1787’s V
OUT
pin is held equal to the
reference voltage appearing at the op amp’s noninverting
input. This allows monitoring V
S
supplies as low as 2.5V.
The op amp’s output may swing from ground to its
positive supply voltage. The low impedance output of the
op amp may drive following circuitry more effectively than
the high output impedance of the LT1787. The I/V con-
verter configuration also works well with split supply
voltages.
Single Supply Unidirectional Operation
Figure 8 shows the simplest connection in which the
LT1787 may be used. The V
BIAS
pin is connected to
ground, and the V
OUT
pin swings positive with increasing
sense current. The LT1787’s outputs can swing as low as
30mV as shown in Figure 9. Accuracy is sacrificed at small
output levels, but this is not a limitation in protection
circuit applications or where sensed currents do not vary
greatly. Increased low level accuracy can be obtained by
level shifting V
BIAS
above ground. The level shifting may
be done with resistor dividers, voltage references or a
simple diode. Accuracy is ensured if the output signal is
sensed differentially between V
BIAS
and V
OUT
.
APPLICATIO
S I
N
FOR
ATIO
U
W
U
相關(guān)PDF資料
PDF描述
LT1787CS8 Precision, High Side Current Sense Amplifiers
LT1787HV Precision, High Side Current Sense Amplifiers
LT1787HVIS8 Precision, High Side Current Sense Amplifiers
LT1787HVCMS8 Precision, High Side Current Sense Amplifiers
LT1789-1 Micropower, Single Supply Rail-to-Rail Output Instrumentation Amplifiers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1787CMS8#PBF 功能描述:IC AMP PREC CURRENT SENSE 8MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:LinCMOS™ 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.05 V/µs 增益帶寬積:110kHz -3db帶寬:- 電流 - 輸入偏壓:0.7pA 電壓 - 輸入偏移:210µV 電流 - 電源:57µA 電流 - 輸出 / 通道:30mA 電壓 - 電源,單路/雙路(±):3 V ~ 16 V,±1.5 V ~ 8 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(yīng)商設(shè)備封裝:14-SOIC 包裝:管件 產(chǎn)品目錄頁面:865 (CN2011-ZH PDF) 其它名稱:296-1834296-1834-5
LT1787CMS8#TR 功能描述:IC AMP PREC CURRENT SENSE 8MSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:LinCMOS™ 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.05 V/µs 增益帶寬積:110kHz -3db帶寬:- 電流 - 輸入偏壓:0.7pA 電壓 - 輸入偏移:210µV 電流 - 電源:57µA 電流 - 輸出 / 通道:30mA 電壓 - 電源,單路/雙路(±):3 V ~ 16 V,±1.5 V ~ 8 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(yīng)商設(shè)備封裝:14-SOIC 包裝:管件 產(chǎn)品目錄頁面:865 (CN2011-ZH PDF) 其它名稱:296-1834296-1834-5
LT1787CMS8#TRPBF 功能描述:IC AMP PREC CURRENT SENSE 8MSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:LinCMOS™ 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.05 V/µs 增益帶寬積:110kHz -3db帶寬:- 電流 - 輸入偏壓:0.7pA 電壓 - 輸入偏移:210µV 電流 - 電源:57µA 電流 - 輸出 / 通道:30mA 電壓 - 電源,單路/雙路(±):3 V ~ 16 V,±1.5 V ~ 8 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(yīng)商設(shè)備封裝:14-SOIC 包裝:管件 產(chǎn)品目錄頁面:865 (CN2011-ZH PDF) 其它名稱:296-1834296-1834-5
LT1787CS8 功能描述:IC AMP PREC CURRENT SENSE 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:2pA 電壓 - 輸入偏移:1000µV 電流 - 電源:85µA 電流 - 輸出 / 通道:20mA 電壓 - 電源,單路/雙路(±):1.8 V ~ 6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC(0.154",3.90mm 寬) 供應(yīng)商設(shè)備封裝:14-SOICN 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:680 (CN2011-ZH PDF) 其它名稱:MCP6L04T-E/SLCT
LT1787CS8#PBF 功能描述:IC AMP PREC CURRENT SENSE 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.028 V/µs 增益帶寬積:105kHz -3db帶寬:- 電流 - 輸入偏壓:3nA 電壓 - 輸入偏移:100µV 電流 - 電源:3.3µA 電流 - 輸出 / 通道:12mA 電壓 - 電源,單路/雙路(±):2.7 V ~ 12 V,±1.35 V ~ 6 V 工作溫度:-40°C ~ 85°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:剪切帶 (CT) 其它名稱:OP481GRUZ-REELCT