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參數(shù)資料
| 型號(hào)： | MAX9643TATA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 2/12頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP CURR SENSE 60V HS 8-TDFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 放大器類型： | 電流檢測(cè) |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 12 V/µs |
| 增益帶寬積： | 15MHz |
| 電流 - 輸入偏壓： | 35µA |
| 電壓 - 輸入偏移： | 10µV |
| 電流 - 電源： | 1mA |
| 電流 - 輸出 / 通道： | 3.4A |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 36 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-WFDFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 8-TDFN-EP（2x3） |
| 包裝： | 帶卷 (TR) |
MAX9643
60V High-Speed Precision Current-Sense Amplifier
10
Maxim Integrated
input voltage transients below -3.5V should be limited by
the use of input series resistors. For example, if an input
voltage transient or fault condition of -12V were to occur
in the application, use a resistor greater than 8.5V/5mA =
1700I. Use 2kI for margin.
The maximum input common-mode voltage extends up
to 60V over the entire VCC range of 2.7V to 36V. It is rec-
ommended to shield the device from overvoltages above
its 65V absolute maximum rating to protect the device.
Output Voltage Range
The internal negative voltage rail generated by the
charge pump is also used to bias the output stage of
the current-sense amplifier, allowing it to feature true
VOL = 0V performance. This feature allows small sense
voltages to be used and eases interface to other analog
and mixed-signal ICs. In reality, attaining true VOL = 0V
specification is usually limited by the offset voltage of the
current-sense amplifier since VOUT = VOS x gain, when
input VSENSE = 0V.
In addition, the maximum output voltage of the IC is inter-
nally clamped to less than 5V even when it is powered
from a 40V rail. This allows easy interface to low-voltage
downstream circuitry without worrying about protecting
them from large input voltage transients or faults.
Common Mode and Differential Filtering
When the AC common-mode signal with large ampli-
tudes (>5VP-P for example) at high frequencies
(> 1kHz for example) is present at the inputs, AC
CMRR limitation causes spikes at the output as shown
in the Common Mode graph in the Typical Operating
Characteristics. Application Note 3888: Performance
of Current-Sense Amplifiers with Input Series Resistors
explains the way to filter out these common-mode tran-
sients as seen by the amplifier and filtering of the differ-
ential mode.
Choosing the Sense Resistor
Choose RSENSE based on the following criteria:
U
Voltage loss: A high RSENSE value causes the
power-source voltage to reduce due to IR drop. For
minimal voltage loss, use the lowest RSENSE value.
U
Accuracy: A high RSENSE value allows lower currents
to be measured more accurately. This is because
input offset voltages become less significant when the
sense voltage is larger.
U
Efficiency and power dissipation: At high current
levels, the I2R losses in RSENSE can be significant.
Take this into consideration when choosing the resis-
tor value and its power dissipation (wattage) rating.
Also, the sense resistor’s value might drift if it is
allowed to heat up excessively.
U
Inductance: Keep inductance low if ISENSE has a
large high-frequency component. 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.
Power-Supply Bypassing and Grounding
For most applications, bypass VCC to GND with a 0.1FF
ceramic capacitor. In many applications, VCC can be
connected to one of the current monitor terminals (RS+
or RS-). Because VCC is independent of the monitored
voltage, VCC can be connected to a separate regulated
supply. There are no specific power-supply sequencing
issues to consider. The part can withstand 60V input
common-mode voltages even when VCC = 0V, and
maintains a high input impedance in this application
condition.
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Chip Information
PROCESS: BiCMOS
PART
PIN-
PACKAGE
GAIN
(V/V)
TEMP
RANGE
MAX9643TATA+
8 TDFN-EP*
2.5
-40NC to +125NC
MAX9643UATA+
8 TDFN-EP*
10
-40NC to +125NC
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9643UASA+ | 功能描述:電流靈敏放大器 60V High-Speed Prec current-Sense Amp 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 |
| MAX9643UASA+T | 功能描述:電流靈敏放大器 60V High-Speed Prec current-Sense Amp 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 |
| MAX9643UATA+ | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:60V HIGH-SPEED PRECISION CURRENT-SENSE AMPLIFIER - Rail/Tube |
| MAX9643UATA+T | 功能描述:電流靈敏放大器 60V High-speed Current-sense Amp 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 |
| MAX9644EBS+TG45 | 功能描述:校驗(yàn)器 IC Low-Power Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
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