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參數(shù)資料
| 型號： | MAX34406HETG+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 11/11頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP CURR SENSE QUAD 24TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 75 |
| 放大器類型： | 電流檢測 |
| 電路數(shù)： | 4 |
| 輸出類型： | 開路漏極 |
| -3db帶寬： | 30kHz |
| 電流 - 輸入偏壓： | 200nA |
| 電壓 - 輸入偏移： | 100µV |
| 電流 - 電源： | 200µA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 24-TQFN-EP（4x4） |
| 包裝： | 管件 |
Maxim Integrated Products 9
MAX34406
Quad Current-Sense Amplifier
with Overcurrent Threshold Comparators
Efficiency and Power Dissipation
At high current levels, the I2R losses in RSENSE can be
significant. Take this into consideration when choosing
the resistor value and its power dissipation (wattage)
rating. Also, the sense resistor’s value might drift if it is
allowed to heat up excessively. The precision VOS of the
device allows the use of small sense resistors to reduce
power dissipation and reduce hot spots.
Kelvin Connections
Because of the high currents that flow through RSENSE,
take care to eliminate parasitic trace resistance from
causing errors in the sense voltage. Either use a four-
terminal current-sense resistor or use Kelvin (force and
sense) PCB layout techniques.
Minimizing Trace Resistance
PCB trace resistance from RSENSE to the INx+ inputs
contributes to gain error in the current-sense amplifiers.
Care should be taken to minimize this resistance (shown
trace resistance can be calculated as follows:
OUTx
TRC
R
G
R1 R
=
+
For example, assume a gain of 100V/V, as in the
Then every 10mI of PCB trace resistance adds -0.01%
gain error.
Optional Output Filter Capacitor
When designing a system that uses a sample-and-hold
stage in the ADC, the sampling capacitor momentarily
loads OUTx and causes a drop in the output voltage. If
sampling time is very short (less than a microsecond),
consider using a ceramic capacitor across OUTx and
GND to hold VOUTx constant during sampling. This also
decreases the small-signal bandwidth of the current-
sense amplifier and reduces noise at OUTx.
Input Filters
Some applications of current-sense amplifiers need to
measure currents accurately even in the presence of
both differential and common-mode ripple, as well as a
wide variety of input transient conditions. For example,
high-frequency ripple at the output of a switching buck or
boost regulator results in a common-mode voltage at the
device’s inputs. Alternatively, the fast load-current tran-
sients, when measuring at the input of a switching buck
or boost regulator, can cause high-frequency differential
sense voltages to occur at the device’s inputs, although
the signal of interest is the average DC value. Such high-
frequency differential sense voltages can result in a volt-
age offset at the device output.
The device allows a method of filtering to help improve
performance in the presence of input common-mode
voltage and input differential voltage transients. Figure 2
shows a differential input filter.
The capacitor CIN between INx+ and INx- along with the
resistor RIN between the sense resistor and INx- helps
filter against input differential voltages and prevents them
from reaching the device.
The corner frequency of this filter is determined by the
choice of RIN, CIN, and the value of the input resistance
at INx- (R1). See Table 1 for R1 values at the different
gain options.
The value of RIN should be chosen to minimize its effect
on the input offset voltage due to the bias current at INx-.
Figure 1. Input Trace Resistance
Figure 2. Differential Input Filter
RSENSE
INx+
GND
INx-
OUTx
RTRC
MAX34406
LOAD
RSENSE
CIN
INx+
GND
INx-
OUTx
RIN
MAX34406
LOAD
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX34406HETG+ | 功能描述:特殊用途放大器 Quad Current-Sense Amplifier RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| MAX34406HETG+T | 功能描述:特殊用途放大器 Quad Current-Sense Amplifier RoHS:否 制造商:Texas Instruments 通道數(shù)量:Single 共模抑制比（最小值）: 輸入補(bǔ)償電壓: 工作電源電壓:3 V to 5.5 V 電源電流:5 mA 最大功率耗散: 最大工作溫度:+ 70 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-20 封裝:Reel |
| MAX34406HETG+TW | 制造商:Maxim Integrated Products 功能描述:WAIVER PART FOR QUAD CURRENT SENSE FAULT DETECTOR T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC AMP CURRENT SENSE 24-TQFN 制造商:Maxim Integrated Products 功能描述:Quad Current-Sense Amplifier |
| MAX34406TETG+ | 功能描述:電流靈敏放大器 QUAD CURRENT-SENSE MONITOR 24L 25V RoHS:否 制造商:Texas Instruments 通道數(shù)量: 共模抑制比（最小值）:110 dB 輸入補(bǔ)償電壓:80 uV 電源電壓-最大:5.5 V 電源電壓-最小:2.7 V 電源電流:350 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX34406TETG+T | 制造商:Maxim Integrated Products 功能描述:QUAD CURRENT SENSE MONITOR 24L 25V TRL - Tape and Reel 制造商:Maxim Integrated Products 功能描述:QUAD CURRENT SENSE MONITOR 24L 25V - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC OPAMP CURR SENSE 60KHZ 24TQFN |
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