参数资料
| 型号： | LTC6101ACMS8#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/22页 |
| 文件大小： | 0K |
| 描述： | IC AMP CURRENT SENSE 8-MSOP |
| 标准包装： | 50 |
| 放大器类型： | 电流检测 |
| 电路数： | 1 |
| 增益带宽积： | 200kHz |
| 电流 - 输入偏压： | 100nA |
| 电压 - 输入偏移： | 85µV |
| 电流 - 电源： | 375µA |
| 电流 - 输出 / 通道： | 1mA |
| 电压 - 电源，单路/双路(±)： | 4 V ~ 60 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 管件 |
LTC6101/LTC6101HV
13
6101fh
APPLICATIONS INFORMATION
If the offset current, IOS, of the LTC6101 amplier is 2nA,
the 100 microvolt error above is reduced to 2 microvolts.
Adding RIN+ as described will maximize the dynamic
range of the circuit. For less sensitive designs, RIN+ is
not necessary.
Example:
If an ISENSE range = (1A to 1mA) and (VOUT/ISENSE) =
3V/1A
Then, from the Electrical Characteristics of the LTC6101,
RSENSE ≈ VSENSE (max) / ISENSE (max) = 500mV/1A =
500mΩ
Gain = ROUT/RIN = VOUT (max) / VSENSE (max) =
3V/500mV = 6
If the maximum output current, IOUT, is limited to 1mA,
ROUT equals 3V/1mA ≈ 3.01 kΩ (1% value) and RIN =
3kΩ/6 ≈ 499Ω (1% value).
The output error due to DC offset is ±900μVolts (typ) and
the error due to offset current, IOS is 3k x 2nA = ±6μVolts
(typical), provided RIN+ = RIN–.
The maximum output error can therefore reach ±906μVolts
or 0.03% (–70dB) of the output full scale. Considering
the system input 60dB dynamic range (ISENSE = 1mA to
1A), the 70dB performance of the LTC6101 makes this
application feasible.
Output Error, EOUT, Due to the Finite DC Open Loop
Gain, AOL, of the LTC6101 Amplier
This error is inconsequential as the AOL of the LTC6101
is very large.
Output Current Limitations Due to Power Dissipation
The LTC6101 can deliver up to 1mA continuous current to
the output pin. This current ows through RINandentersthe
current sense amp via the IN(–) pin. The power dissipated
in the LTC6101 due to the output signal is:
POUT = (V–IN – VOUT) IOUT
Since V–IN ≈ V+, POUT ≈ (V+ – VOUT) IOUT
There is also power dissipated due to the quiescent sup-
ply current:
PQ = IDD V+
The total power dissipated is the output dissipation plus
the quiescent dissipation:
PTOTAL = POUT + PQ
At maximum supply and maximum output current, the
total power dissipation can exceed 100mW. This will
cause signicant heating of the LTC6101 die. In order to
prevent damage to the LTC6101, the maximum expected
dissipation in each application should be calculated. This
number can be multiplied by the
θJA value listed in the
package section on page 2 to nd the maximum expected
die temperature. This must not be allowed to exceed 150°C,
or performance may be degraded.
As an example, if an LTC6101 in the S5 package is to be
run at 55V ±5V supply with 1mA output current at 80°C:
PQ(MAX) = IDD(MAX) V+(MAX) = 41.4mW
POUT(MAX) = IOUT V+(MAX) = 60mW
TRISE = θJA PTOTAL(MAX)
TMAX = TAMBIENT + TRISE
TMAX must be < 150°C
PTOTAL(MAX) ≈ 96mW and the max die temp
will be 104°C
If this same circuit must run at 125°C, the max die
temp will increase to 150°C. (Note that supply current,
and therefore PQ, is proportional to temperature. Refer
to Typical Performance Characteristics section.) In this
condition, the maximum output current should be reduced
to avoid device damage. Note that the MSOP package
has a larger
θJA than the S5, so additional care must be
taken when operating the LTC6101A/LTC6101HVA at high
temperatures and high output currents.
The LTC6101HV can be used at voltages up to 105V. This
additional voltage requires that more power be dissipated
for a given level of current. This will further limit the allowed
output current at high ambient temperatures.
It is important to note that the LTC6101 has been designed
to provide at least 1mA to the output when required, and
can deliver more depending on the conditions. Care must
be taken to limit the maximum output current by proper
choice of sense resistor and, if input fault conditions exist,
external clamps.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6101ACMS8TRPBF | 制造商:LINEAR_DIMENSIONS 制造商全称:LINEAR_DIMENSIONS 功能描述:High Voltage, High-Side Current Sense Amplifi er in SOT-23 |
| LTC6101ACS5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage, High-Side Current Sense |
| LTC6101ACS5#PBF | 制造商:Linear Technology 功能描述:SP Amp Current Sense Amp Single 60V 5-Pin TSOT-23 制造商:Linear Technology 功能描述:CURRENT SENSE AMP 200KHZ 5TS |
| LTC6101ACS5#TR | 制造商:Linear Technology 功能描述:SC-Amps/Current Sense, Current Sense Amplifier |
| LTC6101ACS5#TRM | 制造商:Linear Technology 功能描述:SP Amp Current Sense Amp Single 60V 5-Pin TSOT-23 T/R |
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