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| 型号： | MAX9918ASA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC AMPLIFIER R-R OUTPUT 8SOIC |
| 标准包装： | 100 |
| 放大器类型： | 电流检测 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.6 V/µs |
| -3db带宽： | 75kHz |
| 电流 - 输入偏压： | 175µA |
| 电压 - 输入偏移： | 400µV |
| 电流 - 电源： | 1mA |
| 电压 - 电源，单路/双路(±)： | 4.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 供应商设备封装： | 8-SOICN 裸露焊盘 |
| 包装： | 管件 |
MAX9918/MAX9919/MAX9920
-20V to +75V Input Range, Precision
Uni-/Bidirectional, Current-Sense Amplifiers
EVALUATION KIT AVAILABLE
19-5015; Rev 5; 1/13
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
General Description
The MAX9918/MAX9919/MAX9920 are single-supply,
high-accuracy current-sense amplifiers with a high
input common-mode range that extends from -20V to
+75V. These amplifiers are well suited for current moni-
toring of inductive loads such as motors and solenoids,
where common-mode voltages can become negative
due to inductive kickback, reverse-battery conditions,
or transient events.
The MAX9918/MAX9920 feature adjustable gain set by
an external resistive-divider network. The MAX9919 fea-
tures fixed gains of 45V/V (MAX9919F) and 90V/V
(MAX9919N). The MAX9918/MAX9919/MAX9920 oper-
ate as unidirectional amplifiers when VREFIN = GND
and as bidirectional amplifiers when VREFIN = VCC/2.
The MAX9920 attenuates the input signal by a factor of
4 at the input level-shifting stage allowing the device to
sense voltages up to 200mV (unidirectional operation)
or ±100mV (bidirectional operation).
The MAX9918/MAX9919/MAX9920 operate with a sin-
gle 5V supply voltage, are fully specified over the -40°C
to +125°C automotive temperature range, and are
available in an 8-pin SOIC package.
Applications
H-Bridge Motor Current Sensing
Solenoid Current Sensing
Current Monitoring of Inductive Loads
High- and Low-Side Precision Current Sensing
4x4 Transmission Control
Electronic Throttle Control
Super-Capacitor Charge/Discharge Monitoring in
Hybrid Cars
Precision High-Voltage Current Monitoring
Features
o -20V to +75V Input Common-Mode Voltage Range
o 400V (max) Input Offset Voltage
o 0.6% (max) Gain Accuracy Error
o Uni- or Bidirectional Current Sensing
o Reference Input for Bidirectional OUT
o 120kHz, -3dB Bandwidth (MAX9919N)
o Single-Supply Operation (4.5V to 5.5V)
o 1mA Supply Current
o 0.5A (typ) Shutdown Current
o Rail-to-Rail Output
o -40°C to +125°C Automotive Temperature Range
M
φ2B
φ1B
ADC
REF
A
INPUT STAGE
LEVEL SHIFTER
RSENSE
VBATT
ADJUSTABLE GAIN
VCC
RS+
RS-
FB
OUT
REFIN
R2
R1
GND
SHDN
φ2B
φ1A
MAX9918
MAX9920
μC
Typical Operating Circuit
Ordering Information/
Selector Guide
PART
VSENSE
(mV)
GAIN
(V/V)
PIN-
PACKAGE
MAX9918ASA+
±50
Adjustable
8 SO-EP*
MAX9918ASA/V+
±50
Adjustable
8 SO-EP*
MAX9919FASA+
±50
45
8 SO-EP*
MAX9919FASA/V+
±50
45
8 SO-EP*
MAX9919NASA+
±50
90
8 SO-EP*
MAX9919NASA/V+
±50
90
8 SO-EP*
MAX9920ASA+
±200
Adjustable
8 SO-EP*
MAX9920ASA/V+
±200
Adjustable
8 SO-EP*
Note: All devices operate over the -40°C to +125°C temperature
range.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
*
EP = Exposed pad.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9918ASA/V+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX9918ASA+ | 功能描述:电流灵敏放大器 (-20V to +75V) CMR iSense 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 |
| MAX9918ASA+T | 功能描述:电流灵敏放大器 (-20V to +75V) CMR iSense 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 |
| MAX9918EVKIT+ | 功能描述:特殊用途放大器 MAXIM EVALUATION KIT 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 |
| MAX9919FASA/V+ | 制造商:Maxim Integrated Products 功能描述:-20V TO +75V INPUT RANGE, PRECISION UNI-/BIDIRECTIONAL, CURR - Rail/Tube |
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