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MAX4080 Evaluation Kit
The MAX4080 EV kit, which is assembled with the
MAX4080SAUA, is designed with a full-scale sense
voltage drop of 100mV. For a typical 1A full-scale load
current, this results in the use of a 0.1 Ω sense resistor
on the MAX4080 EV kit using the following equation:
The V OUT reference level is controlled by REF1A and
REF1B. V REF is defined as the average voltage of
VREF1A and VREF1B. Connect REF1A and REF1B
together to a low-noise, regulated voltage source to set
the output reference level. In this mode, V OUT equals
R 1 =
V SENSE _ FULL _ SCALE
I LOAD _ FULL _ SCALE
VREF1A when V SENSE equals zero.
Alternatively, connect REF1B to ground and REF1A to a
low-noise, regulated voltage source. In this case, the
output reference level (V REF ) is equal to VREF1A divid-
For different full-scale sense voltage and full-scale load-
current arrangements, the equation above can be used
to determine the appropriate current-sense-resistor val-
ues. Refer to Table 1. Typical Component Values in the
MAX4080/MAX4081 IC data sheet for further guidance.
Evaluating the
MAX4080FAUA/MAX4080TAUA
The MAX4080 EV kit can be used to evaluate other gain
versions of the MAX4080 (5V/V, 20V/V, 60V/V = F, T, S
suffix). Replace U1 with a different version of the
MAX4080 and refer to Table 1. Typical Component
ed by two. V OUT equals half of VREF1A when V SENSE
equals zero.
In either mode, the output swings above the reference
voltage for positive current sensing (VRS+ > VRS-). The
output swings below the reference voltage for negative
current sensing (VRS+ < VRS-).
Use jumpers JU1 and JU2 to set the V REF on the EV kit.
See Table 1 for jumper settings and the corresponding
V REF values.
Table 1. JU1 and JU2 Jumper Settings
Values in the MAX4080/MAX4081 IC data sheet for
additional information.
SHUNT POSITION
JU1 JU2
V REF
Evaluating the MAX4081 Bidirectional
Current-Sense Amplifiers
The MAX4080 EV kit can also be used to evaluate the
MAX4081 bidirectional current-sense amplifiers.
Replace U1 with a MAX4081SAUA, MAX4081TAUA, or
MAX4081FAUA. The MAX4081 requires an external ref-
1-2
1-2
2-3
2-3
*Default position.
1-2
2-3
1-2
2-3
REFIN*
REFIN/2
(V CC + REFIN)/2
V CC /2
erence to set the zero-current output level (V SENSE =
0V). The charging current is represented by an output
voltage from V REF to V CC , while discharge current is
given from V REF to GND. Measuring V OUT with respect
to V REF (instead of GND) gives a ± output voltage.
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相关代理商/技术参数
MAX4080FASA 功能描述:电流灵敏放大器 76V High-Side Crnt Sense Amp w/V Out 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
MAX4080FASA+ 功能描述:电流灵敏放大器 76V High-Side Crnt Sense Amp w/V Out 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
MAX4080FASA+T 功能描述:电流灵敏放大器 76V High-Side Crnt Sense Amp w/V Out 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
MAX4080FASA-T 功能描述:电流灵敏放大器 76V High-Side Crnt Sense Amp w/V Out 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
MAX4080FAUA 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
MAX4080FAUA+ 功能描述:电流灵敏放大器 76V High-Side Crnt Sense Amp w/V Out 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
MAX4080FAUA+T 功能描述:电流灵敏放大器 76V High-Side Crnt Sense Amp w/V Out 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
MAX4080FAUA-T 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