Data Sheet AD420
SPECIFICATIONS
T
A
= T
MIN
− T
MAX
, V
CC
= +24 V, unless otherwise noted.
Table 1.
AD420-32 Version
Parameter Min Typ Max Units Comments
RESOLUTION 16 Bits
I
OUT
CHARACTERISTICS R
L
= 500 Ω
Operating Current Ranges 4 20 mA
0 20 mA
0 24 mA
Current Loop Voltage Compliance 0 V
CC
− 2.75 V V
Settling Time (to 0.1% of FS)
1
2.5 3 ms
Output Impedance (Current Mode) 25 MΩ
Accuracy
2
Monotonicity 16 Bits
Integral Nonlinearity ±0.002 ±0.012 %
Offset (0 mA or 4 mA) (T
A
= +25°C) ±0.05 %
Offset Drift 20 50 ppm/° C
Total Output Error (20 mA or 24 mA) (T
A
Total Output Error Drift 20 50 ppm/° C
PSRR
3
5 10 µA/V
V
OUT
CHARACTERISTICS
FS Output Voltage Range (Pin 17) 0 5 V
VOLTAGE REFERENCE
REF OUT
Output Voltage (T
A
= +25° C) 4.995 5.0 5.005 V
Drift ±25 ppm/° C
Externally Available Current 5 mA
Short Circuit Current 7 mA
Resistance 30 kΩ
V
LL
Output Voltage 4.5 V
Externally Available Current 5 mA
Short Circuit Current 20 mA
DIGITAL INPUTS
V
IH
(Logic 1) 2.4 V
V
IL
(Logic 0) 0.8 V
I
IH
(V
IN
= 5.0 V) ±10 µA
I
IL
(V
IN
= 0 V) ±10 µA
Data Input Rate (3-Wire Mode) No Minimum 3.3 MBPS
Data Input Rate (Asynchronous Mode) No Minimum 150 kBPS
DIGITAL OUTPUTS
FAULT DEFECT
V
OH
(10 kΩ Pull-Up Resistor to V
LL
) 3.6 4.5 V
V
OL
(10 kΩ Pull-Up Resistor to V
LL
) 0.2 0.4 V
V
OL
@ 2.5 mA 0.6 V
DATA OUT
V
OH
(I
OH
= −0.8 mA) 3.6 4.3 V
V
OL
(I
OL
= 1.6 mA) 0.3 0.4 V
Rev. I | Page 3 of 16