AD5421 Analog Devices, AD5421 Datasheet - Page 4

• Manufacturer Part Number: AD5421
• Description: 16-Bit, Serial Input, Loop-Powered, 4mA to 20mA DAC
• Manufacturer: Analog Devices

Specifications of AD5421

• Resolution (bits): 16bit
• Dac Settling Time: 50µs
• Max Pos Supply (v): +52V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: SPI

AD5421
Parameter
OUTPUT CHARACTERISTICS
REFERENCE INPUT (REFIN PIN)
REFERENCE OUTPUTS
Gain Error TC
Full-Scale Error
Full-Scale Error TC
Downscale Alarm Current
Upscale Alarm Current
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
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
Current
1
3
3, 6
3
3
3
3
3
5
3
3
4
OUT
3
3
Load
3
3
Min
−0.047
−0.028
3.08
22.78
23.99
LOOP− + 5.5
LOOP− + 12.5
0
12
75
2.498
Typ
1
±0.0017
1
100
15
1.2
50
400
3
1
50
0.2
195
256
2.5
800
2.5
1.5
2
4
7.5
245
70
200
10
4
6.5
2
285
5
0.1
0.1
Rev. C | Page 4 of 36
Max
+0.047
+0.028
3.21
23
24.01
2
0.1
2.503
4
8
10
12
0.2
Unit
ppm FSR/°C
% FSR
% FSR
ppm FSR/°C
mA
mA
mA
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
ppm/°C
µV p-p
nV/√Hz
nV/√Hz
ppm
nF
mA
mA
µV/V
ppm
ppm
mV/mA
Ω
Test Conditions/Comments
T
4 mA to 20 mA and 3.8 mA to 21 mA
ranges
3.2 mA to 24 mA range
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 20 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
A grade
At 1 kHz
At 10 kHz
Drift after 1000 hours at T
Recommended operation
Short circuit to COM
First temperature cycle
Second temperature cycle
Measured at 0 mA and 1 mA loads
A
A
= 25°C
= 25°C
OUT
OUT
< 5.5 V, loop current = 24 mA
= 12 V, loop current = 24 mA
OUT
= 5 mA
Data Sheet
A
A
A
= 125°C,
= 125°C,
= 125°C
SET
SET
SET
SET