参数资料
| 型号： | LT6109IMS-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/28页 |
| 文件大小： | 0K |
| 描述： | IC AMP CURRENT SENSE 10MSOP |
| 标准包装： | 50 |
| 类型： | 放大器，比较器，参考 |
| 应用： | 电流感测，电源管理 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
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LT6109-1/LT6109-2
21
610912fa
APPLICATIONS INFORMATION
until the EN/RST pin is transitioned high. When the part
is disabled, both the amplifier and comparator outputs
are high impedance.
When the EN/RST pin is transitioned from low to high
to enable the part, the amplifier output PMOS can turn
on momentarily causing typically 1mA of current to flow
into the SENSEHI pin and out of the OUTA pin. Once the
amplifier is fully on, the output will go to the correct cur-
rent. Figure16 shows this behavior and the impact it has
on VOUTA. Circuitry connected to OUTA can be protected
from these transients by using an external diode to clamp
VOUTA or a capacitor to filter VOUTA.
Power Up
After powering on the LT6109, the comparators must be
reset in order to guarantee a valid state at their outputs.
Fast supply ramps may cause a supply current transient
during start-up as shown in the Typical Performance
Characteristics. This current can be lowered by reducing
the edge speed of the supply.
Reverse-Supply Protection
The LT6109 is not protected internally from external rever-
sal of supply polarity. To prevent damage that may occur
during this condition, a Schottky diode should be added
in series with V— (Figure 17). This will limit the reverse
current through the LT6109. Note that this diode will limit
the low voltage operation of the LT6109 by effectively
reducing the supply voltage to the part by VD.
Alsonotethatthecomparatorreference,comparatoroutput
and EN/RST input are referenced to the V– pin. In order to
preservetheprecisionofthereferenceandtoavoiddriving
the comparator inputs below V–, R2 must connect to the
V– pin. This will shift the amplifier output voltage up by
VD.VOUTAcanbeaccuratelymeasureddifferentiallyacross
R1 and R2. The comparator output low voltage will also be
shifted up by VD. The EN/RST pin threshold is referenced
to the V– pin. In order to provide valid input levels to the
LT6109 and avoid driving EN/RST below V– the negative
supply of the driving circuit should be tied to V–.
Figure 16. Amplifier Enable Response
Figure 15. Comparator Reset Functionality
EN/RST
OUTC1
OUTC2
tRESET
0.5s (TYPICAL)
610912 F15
tRPW(MAX)
15s
COMPARATOR
RESET
RESET PULSE WIDTH LIMITS
tRPW(MIN)
2s
50s/DIV
0V
VEN/RST
2V/DIV
0V
VOUTA
2V/DIV
610912 F14
V+ = 60V
RIN = 100
ROUT = 10k
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| LT6109IMS-2#PBF | 功能描述:IC AMP CURRENT SENSE 10MSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| LT6109IMS-2#TRPBF | 功能描述:IC AMP CURRENT SENSE 10MSOP RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
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