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PDF AD5421 Datasheet ( Hoja de datos )

4mA to 20mA DAC - Analog Devices

Número de pieza AD5421
Descripción 4mA to 20mA DAC
Fabricantes Analog Devices 
Logotipo Analog Devices Logotipo
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AD5421 datasheet

1 Page

AD5421 pdf
AD5421
Data Sheet
SPECIFICATIONS
Loop voltage = 24 V; REFIN = 2.5 V external; RL = 250 Ω; external NMOS connected; all loop current ranges; all specifications
TMIN to TMAX, unless otherwise noted.
Table 1.
Parameter1
ACCURACY, INTERNAL RSET
Resolution
Total Unadjusted Error (TUE)2
TUE Long-Term Stability
Relative Accuracy (INL)
Differential Nonlinearity (DNL)
Offset Error
Offset Error TC3
Gain Error
Gain Error TC3
Full-Scale Error
Full-Scale Error TC3
Downscale Alarm Current
Upscale Alarm Current
ACCURACY, EXTERNAL RSET (24 kΩ)
Resolution
Total Unadjusted Error (TUE)2
TUE Long-Term Stability
Relative Accuracy (INL)
Differential Nonlinearity (DNL)
Offset Error
Offset Error TC3
Gain Error
Min
16
−0.126
−0.041
−0.18
−0.06
−0.27
−0.08
−0.0035
−0.012
−0.024
−1
−0.056
−0.008
−0.11
−0.107
−0.035
−0.2
−0.126
−0.041
−0.25
3.19
22.77
23.97
16
−0.048
−0.027
−0.08
−0.04
−0.0035
−0.012
−1
−0.021
−0.007
−0.03
−0.023
Typ
±0.0064
±0.011
±0.011
210
±0.0015
±0.006
±0.01
±0.0008
±0.0008
1
±0.0058
±0.0058
4
±0.0065
±0.0065
5
±0.002
±0.003
40
±0.0015
±0.006
±0.0012
0.5
±0.0006
Max
+0.126
+0.041
+0.18
+0.06
+0.27
+0.08
+0.0035
+0.012
+0.024
+1
+0.056
+0.008
+0.11
+0.107
+0.035
+0.2
+0.126
+0.041
+0.25
3.21
22.83
24.03
+0.048
+0.027
+0.08
+0.04
+0.0035
+0.012
+1
+0.021
+0.007
+0.03
+0.023
Unit Test Conditions/Comments
Bits
% FSR
% FSR
% FSR
% FSR
% FSR
ppm FSR
% FSR
% FSR
% FSR
LSB
% FSR
% FSR
% FSR
ppm FSR/°C
% FSR
% FSR
% FSR
ppm FSR/°C
% FSR
% FSR
% FSR
ppm FSR/°C
mA
mA
mA
Bits
% FSR
% FSR
% FSR
% FSR
ppm FSR
% FSR
% FSR
LSB
% FSR
% FSR
ppm FSR/°C
% FSR
% FSR
C grade
C grade, TA = 25°C
B grade
B grade, TA = 25°C
A grade
A grade, TA = 25°C
Drift after 1000 hours at TA = 125°C
C grade
B grade
A grade
Guaranteed monotonic
B grade and C grade
B grade and C grade, TA = 25°C
A grade
B grade and C grade
B grade and C grade, TA = 25°C
A grade
B grade and C grade
B grade and C grade, TA = 25°C
A grade
4 mA to 20 mA and 3.8 mA to 21 mA
ranges
3.2 mA to 24 mA range
Assumes ideal resistor, B grade and
C grade only; not specified for A grade
C grade
C grade, TA = 25°C
B grade
B grade, TA = 25°C
Drift after 1000 hours at TA = 125°C
C grade
B grade
Guaranteed monotonic
TA = 25°C
TA = 25°C
Rev. H | Page 4 of 36

5 Page

AD5421 arduino
Data Sheet
AD5421
AC PERFORMANCE CHARACTERISTICS
Loop voltage = 24 V; REFIN = 2.5 V external; RL = 250 Ω; all specifications TMIN to TMAX, unless otherwise noted.
Table 3.
Parameter1
DYNAMIC PERFORMANCE
Loop Current Settling Time
Loop Current Slew Rate
AC Loop Voltage Sensitivity
Min Typ Max Unit Test Conditions/Comments
50 µs To 0.1% FSR, CIN = open circuit
400
µA/µs
CIN = open circuit
1.3
µA/V
1200 Hz to 2200 Hz, 5 V p-p, RL = 3 kΩ
1 Temperature range: −40°C to +105°C; typical at +25°C.
TIMING CHARACTERISTICS
Loop voltage = 24 V; REFIN = 2.5 V external; RL = 250 Ω; all specifications TMIN to TMAX.
Table 4.
Parameter1, 2, 3
t1
t2
t3
t4
t5
t6
t7
t8
t9
t10
t11
t12
t13
Limit at TMIN, TMAX
33
17
17
17
10
25
5
5
25
10
70
0
70
Unit
ns min
ns min
ns min
ns min
ns min
µs min
ns min
ns min
µs min
ns min
ns max
ns min
ns max
Description
SCLK cycle time
SCLK high time
SCLK low time
SYNC falling edge to SCLK falling edge setup time
SCLK falling edge to SYNC rising edge
Minimum SYNC high time
Data setup time
Data hold time
SYNC rising edge to LDAC falling edge
LDAC pulse width low
SCLK rising edge to SDO valid (CL SDO = 30 pF)
SYNC falling edge to SCLK rising edge setup time
SYNC rising edge to SDO tristate (CL SDO = 30 pF)
1 Guaranteed by design and characterization; not production tested.
2 All input signals are specified with tR = tF = 5 ns (10% to 90% of DVDD) and timed from a voltage level of 1.2 V.
3 See Figure 2 and Figure 3.
Table 5. SPI Watchdog Timeout Periods
Parameter1
T0 T1 T2 Min
0 0 0 43
0 0 1 87
0 1 0 436
0 1 1 873
1 0 0 1746
1 0 1 2619
1 1 0 3493
1 1 1 4366
Typ
50
100
500
1000
2000
3000
4000
5000
Max
59
117
582
1163
2326
3489
4652
5814
1 Specifications guaranteed by design and characterization; not production tested.
Unit
ms
ms
ms
ms
ms
ms
ms
ms
Rev. H | Page 9 of 36

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