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参数资料
| 型号： | MAX9929FABT+T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 运算放大器 |
| 英文描述： | -0.1V to +28V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers; Package: UCSP, 6 pin ; Temperature Range: -40°C to +125°C |
| 中文描述： | OP-AMP, 3000 uV OFFSET-MAX, PBGA6 |
| 封装： | 1 X 1.50 MM, ROHS COMPLIANT, UCSP-6 |
| 文件页数： | 2/14页 |
| 文件大小： | 247K |
| 代理商： | MAX9929FABT+T |
MAX9928/MAX9929
-0.1V to +28V Input Range, Micropower,
Uni-/Bidirectional, Current-Sense Amplifiers
10
______________________________________________________________________________________
Voltage Output (MAX9929F)
The output voltage equation for the MAX9929_ is given
below:
VOUT = (RSENSE x ILOAD) x (AV)
where VOUT = the desired full-scale output voltage,
ILOAD = the full-scale current being sensed, RSENSE =
the current-sense resistor, AV = MAX9929F voltage
gain (50V/V).
SIGN Output
The current/voltage at OUT indicates magnitude. The
SIGN output indicates the current’s direction. The SIGN
comparator compares RS+ to RS-. The sign output is
high when RS+ is greater than RS- indicating positive
current flow. The sign output is low when RS- is greater
than RS+ indicating negative current flow. In battery-
operated systems, this is useful for determining
whether the battery is charging or discharging. The
SIGN output might not correctly indicate the direction of
load current when VSENSE is between -1.8mV to -1.2mV
(see Figure 2). Comparator hysteresis of 0.6mV pre-
vents oscillation of SIGN output. If current direction is
not needed, leave SIGN unconnected.
Applications Information
Choosing RSENSE
The MAX9928F/MAX9929F operate over a wide variety
of current ranges with different sense resistors. Adjust
the RSENSE value to monitor higher or lower current lev-
els. Select RSENSE using these guidelines:
Voltage Loss: A high RSENSE value causes the
power-source voltage to drop due to IR loss. For
least voltage loss, use the lowest RSENSE value.
Accuracy: A high RSENSE value allows lower cur-
rents to be measured more accurately. This is
because offsets become less significant when the
sense voltage is larger.
Efficiency and Power Dissipation: At high current
levels, the I2R losses in RSENSE might be significant.
Take this into consideration when choosing the resis-
tor value and power dissipation (wattage) rating.
Also, if the sense resistor is allowed to heat up exces-
sively, its value could drift.
Inductance: If there is a large high-frequency com-
ponent to ISENSE, keep inductance low. Wire-wound
resistors have the highest inductance, while metal
film is somewhat better. Low-inductance metal-film
resistors are available. Instead of being spiral
wrapped around a core, as in metal film or wire-
wound resistors, these are a straight band of metal.
They are made in values under 1
Ω.
Use in Systems with Super Capacitors
Since the input common-mode voltage range of the
MAX9928/MAX9929 extends all the way from -0.1V to
28V, they are ideal to use in applications that require
use of super capacitors for temporary or emergency
energy storage systems. Some modern industrial and
automotive systems use multifarad (1F–50F) capacitor
banks to supply enough energy to keep critical sys-
tems alive even if the primary power source is removed
or temporarily disabled. Unlike batteries, these capaci-
tors can discharge all the way down to 0V. The
MAX9928/MAX9929 can continuously help monitor their
health and state of charge/discharge.
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, PCB techniques,
bump-pad layout, and recommended reflow tempera-
ture profile, as well as the latest information on reliability
testing results, go to Maxim’s website at www.maxim-
ic.com/ucsp
to
find
Application
Note
1891:
Understanding the Basics of the Wafer-Level Chip-
Scale Package (WL-CSP).
Chip Information
PROCESS: BiCMOS
相关PDF资料 |
PDF描述 |
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| MAX9929FAUA+ | -0.1V to +28V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers; Package: uMAX, 8 pin ; Temperature Range: -40°C to +125°C |
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| MAX9951FCCB-TD | Dual Per-Pin Parametric Measurement Units |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9929FAUA+ | 功能描述:电流灵敏放大器 .1-28V uPower Current Sense Amp RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| MAX9929FAUA+T | 功能描述:电流灵敏放大器 .1-28V uPower Current Sense Amp RoHS:否 制造商:Texas Instruments 通道数量: 共模抑制比（最小值）:110 dB 输入补偿电压:80 uV 电源电压-最大:5.5 V 电源电压-最小:2.7 V 电源电流:350 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-16 封装:Reel |
| MAX9929TABS+TG45 | 制造商:Maxim Integrated Products 功能描述:0V TO 28V CMR ISENSE - Tape and Reel |
| MAX9929TAUA+T | 制造商:Maxim Integrated Products 功能描述:- Tape and Reel |
| MAX992EKA | 制造商:Maxim Integrated Products 功能描述:HIGH-SPEED MICROPOWER LOW-VOLTAGE - Cut Tape Product |
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