- 您现在的位置：买卖IC网 > PDF目录16893 > MAX9938EVKIT+ (Maxim Integrated Products)KIT EVAL FOR MAX9938 PDF资料下载
参数资料
| 型号： | MAX9938EVKIT+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/14页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MAX9938 |
| 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 |
| -3db带宽： | 60kHz |
| 工作温度： | -40°C ~ 85°C |
| 电流供应（主 IC）： | 1.1µA |
| 电压 - 电源，单路/双路(±)： | 1.6 V ~ 28 V |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX9938 |
MAX9938
1A, 4-Bump UCSP/SOT23,
Precision Current-Sense Amplifier
6
_______________________________________________________________________________________
Detailed Description
The MAX9938 unidirectional high-side, current-sense
amplifier features a 1.6V to 28V input common-mode
range. This feature allows the monitoring of current out
of a battery with a voltage as low as 1.6V. The
MAX9938 monitors current through a current-sense
resistor and amplifies the voltage across that resistor.
The MAX9938 is a unidirectional current-sense amplifier
that has a well-established history. An op amp is used
to force the current through an internal gain resistor at
RS+, which has a value of R1, such that its voltage drop
equals the voltage drop across an external sense resis-
tor, RSENSE. There is an internal resistor at RS- with the
same value as R1 to minimize offset voltage. The cur-
rent through R1 is sourced by a high-voltage p-channel
FET. Its source current is the same as its drain current,
which flows through a second gain resistor, ROUT. This
produces an output voltage, VOUT, whose magnitude is
ILOAD x RSENSE x ROUT/R1. The gain accuracy is
based on the matching of the two gain resistors R1 and
ROUT (see Table 1). Total gain = 25V/V for the
MAX9938T, 50V/V for the MAX9938F, 100V/V for the
MAX9938H, and 200V/V for the MAX9938W. The output
is protected from input overdrive by use of an output
current limiting circuit of 7mA (typical) and a 6V clamp
protection circuit.
GAIN (V/V)
R1 (
Ω)ROUT (kΩ)
200
100
20
100
10
50
200
10
25
400
10
Table 1. Internal Gain Setting Resistors (Typical Values)
Typical Operating Circuit
VBATT = 1.6V TO 28V
RSENSE
R1
ILOAD
ROUT
R1
GND
OUT
P
MAX9938
RS+
RS-
ADC
LOAD
μC
VDD = 3.3V
10k
Ω
相关PDF资料 |
PDF描述 |
|---|---|
| EMM10DRXS | CONN EDGECARD 20POS DIP .156 SLD |
| LFSMPBS12XEIM | DAUGHTER CARD 9S12XE 112-LQFP |
| GMC08DRES-S93 | CONN EDGECARD 16POS .100 EYELET |
| 0210491004 | CABLE JUMPER 1.25MM .254M 29POS |
| NRS5012T4R7MMGF | INDUCTOR POWER 4.7UH 1.4A SMD |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9938EVKIT+ | 功能描述:放大器 IC 开发工具 MAX9938 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 |
| MAX9938FEBS+G45 | 制造商:Maxim Integrated Products 功能描述:1?A, 4-BUMP UCSP/SOT23,PRECISION CURRENT-SENSE AMPLIFIER - Rail/Tube |
| MAX9938FEBS+T | 功能描述:电流灵敏放大器 1uA Bump 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 |
| MAX9938FEBS+TG45 | 功能描述:电流灵敏放大器 1uA Bump 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 |
| MAX9938FELT+ | 制造商:Maxim Integrated Products 功能描述:1?A, 4-BUMP UCSP/SOT23, PRECISION CURRENT-SENSE AMPLIFIER - Rail/Tube |
发布紧急采购，3分钟左右您将得到回复。