參數(shù)資料
型號: AD7195BCPZ-RL
廠商: Analog Devices Inc
文件頁數(shù): 41/45頁
文件大小: 0K
描述: IC AFE 24BIT 4.8K 32LFSP
設(shè)計資源: Precision Weigh Scale Design Using AD7195 with Internal PGA and AC Excitation (CN0155)
標準包裝: 5,000
位數(shù): 24
通道數(shù): 4
電壓 - 電源,模擬: 4.75 V ~ 5.25 V
電壓 - 電源,數(shù)字: 2.7 V ~ 5.25 V
封裝/外殼: 32-WFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 32-LFCSP-WQ(5x5)
包裝: 帶卷 (TR)
AD7195
Rev. 0 | Page 4 of 44
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments1
External Clock
@ 50 Hz, 60 Hz
100
dB
10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz
67
dB
50 Hz output data rate, REJ606 = 1, 50 ± 1 Hz, 60 ± 1 Hz
@ 50 Hz
95
dB
50 Hz output data rate, 50 ± 1 Hz
@ 60 Hz
95
dB
60 Hz output data rate, 60 ± 1 Hz
ANALOG INPUTS
Differential Input Voltage
Ranges
±VREF/gain
V
VREF = REFIN(+) REFIN(), gain = 1 to 128
(AVDD
1.25 V)/gain
+(AVDD
1.25 V)/gain
V
Gain > 1
Absolute AIN Voltage Limits2
Unbuffered Mode
AGND 0.05
AVDD + 0.05
V
Buffered Mode
AGND + 0.25
AVDD 0.25
V
Analog Input Current
Buffered Mode
Input Current2
2
+2
nA
Gain = 1
4.5
+4.5
nA
Gain > 1
Input Current Drift
±5
pA/°C
Unbuffered Mode
Input Current
±5
μA/V
Gain = 1, input current varies with input voltage
±1
μA/V
Gain > 1
Input Current Drift
±0.05
nA/V/°C
External clock
±1.6
nA/V/°C
Internal clock
REFERENCE INPUT
REFIN Voltage
1
AVDD
V
REFIN = REFIN(+) REFIN(). The differential input must
be limited to ±(AVDD 1.25 V)/gain when gain > 1
Absolute REFIN Voltage
Limits2
GND 0.05
AVDD + 0.05
V
Average Reference Input
Current
7
μA/V
Average Reference Input
Current Drift
±0.03
nA/V/°C
External clock
±1.3
nA/V/°C
Internal clock
Normal Mode Rejection2
Same as for
analog inputs
Common-Mode Rejection
95
dB
Reference Detect Levels
0.3
0.6
V
TEMPERATURE SENSOR
Accuracy
±2
°C
Applies after user calibration at 25°C
Sensitivity
2815
Codes/°C
Bipolar mode
BRIDGE POWER-DOWN SWITCH
RON
10
Ω
Allowable Current2
30
mA
Continuous current
BURNOUT CURRENTS
AIN Current
500
nA
Analog inputs must be buffered and chop disabled
DIGITAL OUTPUTS (ACXx, ACXx )
Output High Voltage, VOH2
4
V
AVDD = 5 V, ISOURCE = 200 μA
Output Low Voltage, VOL2
0.4
V
AVDD = 5 V, ISINK = 800 μA
INTERNAL/EXTERNAL CLOCK
Internal Clock
Frequency
4.72
5.12
MHz
Duty Cycle
50:50
%
External Clock/Crystal2
Frequency
2.4576
4.9152
5.12
MHz
Input Low Voltage VINL
0.8
V
DVDD = 5 V
0.4
V
DVDD = 3 V
Input High Voltage, VINH
2.5
V
DVDD = 3 V
3.5
V
DVDD = 5 V
Input Current
10
+10
μA
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