AD5421_11 AD [Analog Devices], AD5421_11 Datasheet - Page 4

• Manufacturer Part Number: AD5421_11
• Description: 16-Bit, Serial Input, Loop-Powered, 4 mA to 20 mA DAC
• Manufacturer: AD [Analog Devices]

AD5421
Parameter
OUTPUT CHARACTERISTICS
REFERENCE INPUT (REFIN PIN)
REFERENCE OUTPUTS
REG
Loop Compliance Voltage
Loop Current Long-Term Stability
Loop Current Error vs. REG
Resistive Load
Inductive Load
Power Supply Sensitivity
Output Impedance
Output TC
Output Noise
Noise Spectral Density
Reference Input Voltage
DC Input Impedance
REFOUT1 Pin
REFOUT2 Pin
Output Voltage
Output Voltage TC
Output Voltage Accuracy
Externally Available Current
Short-Circuit Current
Line Regulation
Load Regulation
OUT
0.1 Hz to 10 Hz
500 Hz to 10 kHz
Output Voltage
Temperature Coefficient
Output Noise (0.1 Hz to 10 Hz)
Noise Spectral Density
Output Voltage Drift vs. Time
Capacitive Load
Load Current
Short-Circuit Current
Power Supply Sensitivity
Thermal Hysteresis
Load Regulation
Output Impedance
Output Voltage
Output Impedance
Current
OUTPUT
1
3, 6
3
3
3
3
3
3
3
5
3
3
4
OUT
3
3
3, 6
Load
3
3
Min
LOOP− + 5.5
LOOP− + 12.5
0
12
75
2.498
1.18
1.8
−4
3.15
Typ
100
15
1.2
50
400
3
1
50
0.2
195
256
2.5
800
2.5
1.5
2
7.5
245
70
200
10
4
6.5
2
285
5
0.1
0.1
1.227
72
110
±2
23
500
10
8
Rev. 0 | Page 4 of 32
Max
2
0.1
2.503
4
10
12
0.2
1.28
12
+4
Unit
V
V
ppm FSR
ppm FSR
μA/mA
kΩ
mH
μA/V
MΩ
ppm FSR/°C
ppm FSR/°C
nA p-p
mV rms
nA/√Hz
nA/√Hz
V
MΩ
V
ppm/°C
ppm/°C
μV p-p
nV/√Hz
nV/√Hz
ppm
nF
mA
mA
μV/V
ppm
ppm
mV/mA
Ω
V
kΩ
V
ppm/°C
%
mA
mA
mV/V
mV/V
mV/mA
Test Conditions/Comments
REG
REG
Drift after 1000 hours at T
loop current = 12 mA, internal R
Drift after 1000 hours at T
loop current = 12 mA, external R
Loop current = 12 mA, load current
from REG
See Figure 19 for a load line graph
Stable operation
Loop current = 12 mA
Loop current = 12 mA, internal R
Loop current = 12 mA, external R
HART bandwidth; measured across
500 Ω load
At 1 kHz
At 10 kHz
For specified performance
T
C grade
B grade
At 1 kHz
At 10 kHz
Drift after 1000 hours at T
Stable operation
Short circuit to COM
First temperature cycle
Second temperature cycle
Measured at 0 mA and 1 mA loads
T
Voltage regulator output
See Table 10
Assuming 4 mA flowing in the loop
and during HART communications
Internal NMOS
External NMOS
A
A
= 25°C
= 25°C
OUT
OUT
< 5.5 V, loop current = 24 mA
= 12 V, loop current = 24 mA
OUT
= 5 mA
A
A
A
= 125°C,
= 125°C,
= 125°C
SET
SET
SET
SET