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| 型号： | MAX9934EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/19页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX9934 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 每 IC 通道数： | 1 - 单 |
| 放大器类型： | 电流检测 |
| 输出类型： | 单端 |
| 工作温度： | -40°C ~ 125°C |
| 电流供应（主 IC）： | 120µA |
| 电压 - 电源，单路/双路(±)： | 2.5 V ~ 3.6 V |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX9934 |
MAX9934
High-Precision, Low-Voltage, Current-Sense Amplifier
with Current Output and Chip Select for Multiplexing
10
Maxim Integrated
Detailed Description
The MAX9934 high-side, current-sense amplifier moni-
tors current through an external current-sense resistor
by amplifying the voltage across the resistor (VSENSE)
to create an output current (IOUT). An output voltage
(VOUT) then develops across the external output resis-
tor (ROUT). See the Typical Operating Circuit.
The MAX9934 uses precision amplifier design tech-
niques to achieve a low-input offset voltage of less than
10V. These techniques also enable extremely low-input
offset voltage drift over time and temperature and
achieve gain error of less than 0.25%. The precision VOS
specification allows accurate current measurements with
a low-value current-sense resistor, thus reducing power
dissipation in battery-powered systems, as well as load-
regulation issues in low-voltage DC power supplies.
The MAX9934 high-side current-sense amplifier fea-
tures a -0.1V to +5.5V input common-mode range that
is independent of supply voltage (VCC). This ability to
sense at voltages beyond the supply rail allows the
monitoring of currents out of a power supply even in a
shorted condition, while also enabling high-side current
sensing at voltages greater than the MAX9934 supply
Pin Description
PIN/BUMP
UCSP
MAX
NAME
FUNCTION
A1
1
VCC
Power Supply
A2
2
OUT
Current Output. OUT provides an output current proportional to input VSENSE. Connect an
external resistor (ROUT) from OUT to GND for unidirectional sensing or to an external reference
voltage for bidirectional sensing.
A3
3
GND
Ground
B1
8
RS+
Sense Resistor Power Side Connection
B2
7
RS-
Sense Resistor Load Side Connection
B3
6
CS
Chip-Select Input. Drive CS high to enable OUT, drive CS low to put OUT in a high-impedance
state.
—
4, 5
N.C.
No Connection. Not internally connected.
% FINAL VALUE
VOUT
±1V STEP
tS
2V
1V
tS
% FINAL VALUE
VSENSE
Figure 1. Output Settling Time
CS
OUT
GND
RS-
RS+
VCC
*RGAIN
Gm
MAX9934
Gm
*RGAIN = 40
FOR THE MAX9934T AND
RGAIN = 200
FOR THE MAX9934F.
Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9934EVKIT+ | 功能描述:放大器 IC 开发工具 MAX9934 Eval Kit RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
| MAX9934FALT+T | 功能描述:电流灵敏放大器 Precision 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 |
| MAX9934FART+T | 功能描述:电流灵敏放大器 Precision 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 |
| MAX9934FART+TG0Y | 功能描述:特殊用途放大器 RoHS:否 制造商:Texas Instruments 通道数量:Single 共模抑制比（最小值）: 输入补偿电压: 工作电源电压:3 V to 5.5 V 电源电流:5 mA 最大功率耗散: 最大工作温度:+ 70 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:QFN-20 封装:Reel |
| MAX9934FAUA+ | 功能描述:电流灵敏放大器 Precision 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 |
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