主要電氣參數
表 4為HX711 Pin接腳電氣參數英文說明,表 5為HX711 Pin接腳電氣參數說明。
Parameter
|
Notes
|
MIN
|
TYP
|
MAX
|
UNIT
|
|||
Full scale differential
input range
|
V(inp)-V(inn)
|
±0.5(AVDD/GAIN)
|
V
|
|||||
Common mode input
|
|
AGND+1.2
|
AVDD-1.3
|
V
|
||||
Output data rate
|
Internal
Oscillator, RATE = 0
|
10
|
Hz
|
|||||
Internal
Oscillator, RATE =
DVDD
|
80
|
|||||||
Crystal
or external clock,
RATE = 0
|
fclk/1,105,920
|
|||||||
Crystal
or external clock,
RATE = DVDD
|
fclk/138,240
|
|||||||
Output data coding
|
2’s complement
|
800000
|
7FFFFF
|
HEX
|
||||
Output settling
time
|
RATE = 0
|
400
|
50
|
|||||
RATE = DVDD
|
50
|
|||||||
Input offset drift
|
Gain = 128
|
0.2
|
mV
|
|||||
Gain = 64
|
0.4
|
|||||||
Input noise
|
Gain = 128,RATE = 0
|
50
|
nV(rms)
|
|||||
Gain = 128,RATE = DVDD
|
90
|
|||||||
Temperature drift
|
Input offset(Gain = 128)
|
±6
|
nV/℃
|
|||||
Gain(Gain = 128)
|
±5
|
ppm/℃
|
||||||
Input common mode
rejection
|
Gain = 128,RATE = 0
|
100
|
dB
|
|||||
Power supply rejection
|
Gain = 128,RATE = 0
|
100
|
dB
|
|||||
Reference bypass
(VBG)
|
|
1.25
|
V
|
|||||
Crystal or
external clock frequency
|
|
1
|
11.0592
|
20
|
MHz
|
|||
Power supply voltage
|
DVDD
|
2.6
|
|
5.5
|
V
|
|||
AVDD,VSUP
|
2.6
|
|
5.5
|
|||||
Analog supply
current (including regulator)
|
Normal
|
1400
|
μA
|
|||||
Power down
|
0.3
|
|||||||
Digital supply current
|
Normal
|
100
|
μA
|
|||||
Power down
|
0.2
|
|||||||
資料來源:(海芯科技, 2013)
參數
|
條件及說明
|
最小值典型值最大值
|
單位
|
滿額度差分輸入範圍
|
V(inp)-V(inn)
|
±0.5(AVDD/GAIN)
|
V
|
輸入共模電壓範圍
|
AGND+0.6
AVDD-0.6
|
V
|
|
使用片內振盪器,RATE = 0
|
10
|
Hz
|
|
輸出資料速率
|
使用片內振盪器,RATE = DVDD
|
80
|
|
外部時鐘或晶振,RATE =
0
|
fclk/1,105,920
|
||
外部時鐘或晶振,RATE = DVDD
|
fclk/138,240
|
||
輸出資料編碼
|
二進位補數
|
800000
7FFFFF(HEX)
|
|
輸出穩定時間(1)
|
RATE =
0
|
400
|
ms
|
RATE = DVDD
|
50
|
||
輸入零點漂移
|
增益 = 128
|
0.2
|
mV
|
增益 = 64
|
0.8
|
||
輸入雜訊
|
增益 = 128,RATE =
0
|
50
|
nV(rms)
|
增益 = 128,RATE =
DVDD
|
90
|
||
溫度係數
|
輸入零點漂移(增益 = 128)
|
±7
|
nV/℃
|
增益漂移(增益 = 128)
|
±3
|
ppm/℃
|
|
輸入共模信號抑制比
|
增益 = 128,RATE =
0
|
100
|
dB
|
電源干擾抑制比
|
增益 = 128,RATE =
0
|
100
|
dB
|
輸出參考電壓(VBG)
|
1.25
|
V
|
|
外部時鐘或晶振頻率
|
1
|
11.0592 30
|
MHz
|
電源電壓
|
DVDD
|
2.6 5.5
|
V
|
AVDD,VSUP
|
2.6 5.5
|
|
|
模擬電源電流(含穩壓 電路)
|
正常工作
|
1600
|
μA
|
斷電
|
0.3
|
||
數位電源電流
|
正常工作
|
100
|
μA
|
斷電
|
0.2
|
|
資料來源:(海芯科技, 2013)
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