- 您现在的位置：买卖IC网 > PDF目录6104 > LT6106HS5#TRMPBF (Linear Technology)IC AMP CURRENT SENSE TSOT23-5 PDF资料下载
参数资料
| 型号： | LT6106HS5#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/12页 |
| 文件大小： | 0K |
| 描述： | IC AMP CURRENT SENSE TSOT23-5 |
| 标准包装： | 1 |
| 放大器类型： | 电流检测 |
| 电路数： | 1 |
| -3db带宽： | 200kHz |
| 电流 - 输入偏压： | 40nA |
| 电压 - 输入偏移： | 150µV |
| 电流 - 电源： | 70µA |
| 电流 - 输出 / 通道： | 1mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 36 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 包装： | 标准包装 |
| 产品目录页面： | 1320 (CN2011-ZH PDF) |
| 其它名称： | LT6106HS5#TRMPBFDKR |
LT6106
7
6106fa
APPLICATIONS INFORMATION
Introduction
The LT6106 high side current sense amplier (Figure 1) pro-
videsaccuratemonitoringofcurrentthroughauser-selected
sense resistor. The sense voltage is amplied by a user-
selected gain and level shifted from the positive power sup-
ply to a ground-referred output. The output signal is analog
and may be used as is, or processed with an output lter.
Theory of Operation
An internal sense amplier loop forces –IN to have the
same potential as +IN. Connecting an external resistor,
RIN, between –IN and V+ forces a potential across RIN
that is the same as the sense voltage across RSENSE. A
corresponding current, VSENSE/RIN, will ow through RIN.
The high impedance inputs of the sense amplier will not
conduct this current, so it will ow through an internal
PNP to the output pin as IOUT.
The output current can be transformed into a voltage by
adding a resistor from OUT to V–. The output voltage is
then VO = V– + IOUT ROUT.
Table 1. Useful Gain Congurations
GAIN
RIN
ROUT
VSENSE at VOUT = 5V
IOUT at VOUT = 5V
20
499Ω
10k
250mV
500μA
50
200Ω
10k
100mV
500μA
100
100Ω
10k
50mV
500μA
GAIN
RIN
ROUT
VSENSE at VOUT = 2.5V IOUT at VOUT = 2.5V
20
249Ω
5k
125mV
500μA
50
100Ω
5k
50mV
500μA
100
50Ω
5k
25mV
500μA
Selection of External Current Sense Resistor
The external sense resistor, RSENSE, has a signicant ef-
fect on the function of a current sensing system and must
be chosen with care.
First, the power dissipation in the resistor should be con-
sidered. The system load current will cause both heat and
voltage loss in RSENSE. As a result, the sense resistor
should be as small as possible while still providing the
input dynamic range required by the measurement. Note
that input dynamic range is the difference between the
maximum input signal and the minimum accurately mea-
sured signal, and is limited primarily by input DC offset of
the internal amplier of the LT6106. In addition, RSENSE
must be small enough that VSENSE does not exceed the
maximum input voltage specied by the LT6106, even un-
der peak load conditions. As an example, an application
may require that the maximum sense voltage be 100mV.
If this application is expected to draw 2A at peak load,
RSENSE should be no more than 50mΩ.
Once the maximum RSENSE value is determined, the mini-
mum sense resistor value will be set by the resolution or
dynamic range required. The minimum signal that can be
accurately represented by this sense amplier is limited by
the input offset. As an example, the LT6106 has a typical
input offset of 150μV. If the minimum current is 20mA, a
sense resistor of 7.5mΩ will set VSENSE to 150μV. This is
the same value as the input offset. A larger sense resis-
tor will reduce the error due to offset by increasing the
sense voltage for a given load current. Choosing a 50mΩ
RSENSE will maximize the dynamic range and provide a
system that has 100mV across the sense resistor at peak
load (2A), while input offset causes an error equivalent to
only 3mA of load current. Peak dissipation is 200mW. If a
5mΩ sense resistor is employed, then the effective current
error is 30mA, while the peak sense voltage is reduced to
10mV at 2A, dissipating only 20mW.
The low offset and corresponding large dynamic range of
the LT6106 make it more exible than other solutions in
this respect. The 150μV typical offset gives 60dB of dy-
namic range for a sense voltage that is limited to 150mV
maximum, and over 70dB of dynamic range if the rated
input maximum of 0.5V is allowed.
Sense Resistor Connection
Kelvin connection of the –IN and +IN inputs to the sense
resistor should be used in all but the lowest power appli-
cations. Solder connections and PC board interconnec-
tions that carry high current can cause signicant error
in measurement due to their relatively large resistances.
One 10mm × 10mm square trace of one-ounce copper is
approximately 0.5mΩ. A 1mV error can be caused by as
little as 2A owing through this small interconnect. This
will cause a 1% error in a 100mV signal. A 10A load cur-
rent in the same interconnect will cause a 5% error for the
same 100mV signal. By isolating the sense traces from the
high current paths, this error can be reduced by orders of
相关PDF资料 |
PDF描述 |
|---|---|
| P6SMB12AT3G | TVS ZENER UNIDIR 600W 12V SMB |
| SFM210-LPSE-D25-ST-BK | CONN HDR FMAL 50PS 1MM DL AU T/H |
| TSW-114-08-T-S | CONN HEADER 14POS .100" SNGL TIN |
| AD8542ARZ | IC OPAMP GP R-R CMOS 1MHZ 8SOIC |
| TSW-103-07-T-D | CONN HEADER 6POS .100" DUAL TIN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT6107 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Temperature High Side Current Sense Amp in SOT-23 |
| LT6107MPS5#PBF | 制造商:Linear Technology 功能描述:SP Amp Current Sense Amp Single 36V 5-Pin TSOT-23 制造商:Linear Technology 功能描述:Bulk 制造商:Linear Technology 功能描述:AMPLIFIER, CURRENT SENSE, 200KHZ, TSOT-23-5; No. of Amplifiers:1; Input Bias Current:40nA; Input Offset Voltage:150V; Amplifier Case Style:TSOT-23; No. of Pins:5; Bandwidth:200kHz; Supply Voltage Min:2.7V; Supply Voltage Max:36V ;RoHS Compliant: Yes |
| LT6107MPS5#TRMPBF | 功能描述:IC AMP CURRENT SENSE HS TSOT23-5 RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 产品培训模块:Differential Circuit Design Techniques for Communication Applications 标准包装:1 系列:- 放大器类型:RF/IF 差分 电路数:1 输出类型:差分 转换速率:9800 V/µs 增益带宽积:- -3db带宽:2.9GHz 电流 - 输入偏压:3µA 电压 - 输入偏移:- 电流 - 电源:40mA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VQFN 裸露焊盘，CSP 供应商设备封装:16-LFCSP-VQ 包装:剪切带 (CT) 产品目录页面:551 (CN2011-ZH PDF) 其它名称:ADL5561ACPZ-R7CT |
| LT6107MPS5#TRPBF | 功能描述:IC AMP CURRENT SENSE HS TSOT23-5 RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 其它有关文件:Automotive Product Guide 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:3 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:70µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:48mA 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:Digi-Reel® 其它名称:MAX4475AUT#TG16DKR |
| LT6107MPS5-TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Temperature High Side Current Sense Amp in SOT-23 |
发布紧急采购，3分钟左右您将得到回复。