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參數資料
| 型號： | MAX4374EVKIT+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 3/13頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVALUATION KIT FOR MAX4374 |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1 |
| 每 IC 通道數： | 1 - 單 |
| 放大器類型： | 電流檢測 |
| 輸出類型： | 單端 |
| -3db帶寬： | 120kHz |
| 工作溫度： | -40°C ~ 85°C |
| 電流供應（主 IC）： | 50µA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 28 V |
| 板類型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX4374 |
Power-Supply Bypassing
It is recommended that VCC be bypassed to GND with
at least a 0.1F ceramic capacitor to isolate the IC from
supply voltage transients. It is possible that plugging
in/out a battery or AC adapter/charger could cause
large, fast line transients (>5V/s) at VCC. The simplest
solution is to run VCC from a better regulated supply
(+5V for example), since VCC and RS+ (or RS-) do not
have to be connected together.
For high-speed VCC transients, another solution is to
add a resistor in series with the VCC pin and a 0.1F
capacitor to create an RC time constant to slow the rise
time of the transient. Since these current-sense ampli-
fiers consume less than 100A, even a 2.5k resistor
only drops an extra 250mV at VCC. For most applica-
tions with fast transients, 1k in conjunction with a
0.1F bypass capacitor works well.
RESET at Power-Up
The RESET pin is used to control the latch function of
comparator 1. Holding RESET low (<0.8V) makes the
latch transparent and COUT1 will respond to changes
at CIN1, above and below the internal 600mV reference
threshold voltage. When RESET is high (>2.0V), once
CIN1 rises above 600mV, COUT1 latches into the
open-drain OFF state and remains in this state even if
CIN1 drops below 600mV. Pulsing RESET low for at
least 1.5s resets the latch.
There is no internal circuitry to control the reset function
during power-up. To prevent false latching, RESET
must be held low until the VCC power has risen above
the 2.7V minimum operating supply voltage. This is
easily accomplished when RESET is driven under C or
logic gate control. However, if RESET is to be always
connected high, add an RC between VCC, RESET and
GND (see Figure 2). Note that RESET cannot exceed
VCC + 0.3V or +12V, whichever is less.
The following formula can be used to determine the
appropriate RC value.
where T is the maximum time for VCC to reach 2.7V and
0.8V is the maximum RESET logic low voltage. For
example, a 470k resistor and 0.22F capacitor will
keep RESET low during a power-up time of up to 36ms.
A faster power-up time is also safe with the calculated
R and C since the capacitor will have even less time to
charge.
RC
T
VV
V
T
=
()
=
ln .
/( .
.
)
.
2 7
0 8
0 3514
MAX4373/MAX4374/MAX4375
Low-Cost, Micropower, High-Side Current-Sense
Amplifier + Comparator + Reference ICs
______________________________________________________________________________________
11
RS-
RS+
OUT
CIN1
CIN2
LOAD
VCC = 2.7V TO 28V
VIN = 0 TO 28V
MAX4375
GND
VCC
GND
R5
R4
RSENSE
+ VSENSE -
R3
COUT1
R2
R1
COUT2
ILOAD
RESET
VPULL-UP
(UP TO 5V)
Figure 3. MAX4375 Window Detector
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX4374EVKIT+ | 功能描述:放大器 IC 開發(fā)工具 uPower High-Side Current-Sense Amp RoHS:否 制造商:International Rectifier 產品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| MAX4374FESD | 功能描述:電流靈敏放大器 uPower High-Side Current-Sense Amp RoHS:否 制造商:Texas Instruments 通道數量: 共模抑制比（最小值）:110 dB 輸入補償電壓: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX4374FESD+ | 功能描述:電流靈敏放大器 uPower High-Side Current-Sense Amp RoHS:否 制造商:Texas Instruments 通道數量: 共模抑制比（最小值）:110 dB 輸入補償電壓: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX4374FESD+T | 功能描述:電流靈敏放大器 uPower High-Side Current-Sense Amp RoHS:否 制造商:Texas Instruments 通道數量: 共模抑制比（最小值）:110 dB 輸入補償電壓: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
| MAX4374FESD-T | 功能描述:電流靈敏放大器 uPower High-Side Current-Sense Amp RoHS:否 制造商:Texas Instruments 通道數量: 共模抑制比（最小值）:110 dB 輸入補償電壓: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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-16 封裝:Reel |
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