参数资料
型号: MAX9934TALT+T
厂商: Maxim Integrated Products
文件页数: 5/19页
文件大小: 0K
描述: IC AMP CURR SENSE LV 6UDFN
标准包装: 2,500
放大器类型: 电流检测
电路数: 1
-3db带宽: 1.5kHz
电流 - 输入偏压: 35µA
电压 - 输入偏移: 10µV
电流 - 电源: 120µA
电压 - 电源,单路/双路(±): 2.5 V ~ 3.6 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 6-WFBGA,CSPBGA
供应商设备封装: 6-uCSP(1.57x1.16)
包装: 带卷 (TR)
MAX9934
High-Precision, Low-Voltage, Current-Sense Amplifier
with Current Output and Chip Select for Multiplexing
13
Maxim Integrated
In Figure 5, VOUT is equal to VBIAS when the sum of all
outputs is zero. For positive input-sense voltages, the
MAX9934 sources current causing its output voltage to
rise above VBIAS. For negative input-sense voltages,
the MAX9934 sinks current causing its output voltage to
be lower than VBIAS, thus allowing bidirectional current
sensing.
Since the ADC reference voltage, VREF, determines the
full-scale reading, a common choice for VBIAS is
VREF/2. The current output makes it possible to use a
simple resistor-divider from VREF to GND to generate
VBIAS. The output resistance for gain calculation is the
parallel combination of the two resistors. For example, if
two equal value resistors, R, are used to generate a
VBIAS = VREF/2, the output termination resistance for
gain calculation is ROUT = R/2. See Figure 5.
VCC = 3.3V
RSENSE
-0.1V
≤ VCM ≤ 5.5V
RSENSE
-0.1V
≤ VCM ≤ 5.5V
RSENSE
-0.1V
≤ VCM ≤ 5.5V
MAX9934
R
10k
ADC
VREF
CS2
CS1
MICROCONTROLLER
CS
TO EXTERNAL
REFERENCE
VOLTAGE
10k
R
CS3
(OPTIONAL)
VIN1
VIN2
VIN3
ILOAD3
ILOAD2
ILOAD1
VOUT
OUT3
OUT2
OUT1
ROUT =
R
2
Figure 5. Bidirectional Multiplexed Operation
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