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AD5421 bảng dữ liệu(PDF) 5 Page - Analog Devices

tên linh kiện AD5421
Giải thích chi tiết về linh kiện  16-Bit, Serial Input, Loop-Powered, 4 mA to 20 mA DAC
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AD5421 bảng dữ liệu(HTML) 5 Page - Analog Devices

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AD5421
Rev. 0 | Page 5 of 32
Parameter1
Min
Typ
Max
Unit
Test Conditions/Comments
Inductive Load
50
mH
Stable operation
Capacitive Load
2
10
μF
Stable operation
ADC ACCURACY
Die Temperature
±5
°C
VLOOP Input
±1
%
DVDD OUTPUT
Can be overdriven up to 5.5 V
Output Voltage
3.17
3.3
3.48
V
Externally Available Current3, 6
3.15
mA
Assuming 4 mA flowing in the loop
and during HART communications
Short-Circuit Current
7.7
mA
Load Regulation
11
mV/mA
Measured at 0 mA and 3 mA loads
DIGITAL INPUTS3
SCLK, SYNC, SDIN, LDAC
Input High Voltage, VIH
0.7 × IODVDD
V
Input Low Voltage, VIL
0.25 × IODVDD
V
Hysteresis
0.21
V
IODVDD = 1.8 V
0.63
V
IODVDD = 3.3 V
1.46
V
IODVDD = 5.5 V
Input Current
−0.015
+0.015
μA
Per pin
Pin Capacitance
5
pF
Per pin
DIGITAL OUTPUTS3
SDO Pin
Output Low Voltage, VOL
0.4
V
Output High Voltage, VOH
IODVDD − 0.5
V
High Impedance Leakage
Current
−0.01
+0.01
μA
High Impedance Output
Capacitance
5
pF
FAULT Pin
Output Low Voltage, VOL
0.4
V
Output High Voltage, VOH
IODVDD − 0.5
V
FAULT THRESHOLDS
ILOOP Under
ILOOP – 0.01% FSR
mA
ILOOP Over
ILOOP + 0.01% FSR
mA
Temp 140°C
133
°C
Fault removed when temperature
≤ 125°C
Temp 100°C
90
°C
Fault removed when temperature
≤ 85°C
VLOOP 6V
0.3
V
Fault removed when VLOOP ≥ 0.4 V
VLOOP 12V
0.6
V
Fault removed when VLOOP ≥ 0.7 V
POWER REQUIREMENTS
REGIN
5.5
52
V
With respect to LOOP−
IODVDD
1.71
5.5
V
With respect to COM
Quiescent Current
260
300
μA
1 Temperature range: −40°C to +105°C; typical at +25°C.
2 Total unadjusted error is the total measured error (offset error + gain error + linearity error + output drift over temperature) after factory calibration of the AD5421.
System level total error can be reduced using the offset and gain registers.
3 Guaranteed by design and characterization; not production tested.
4 The voltage between LOOP− and REGIN must be 5.5 V or greater.
5 The AD5421 is factory calibrated with an external 2.5 V reference connected to REFIN.
6 This is the current that the output is capable of sourcing. The load current originates from the loop and, therefore, contributes to the total current consumption figure.


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