AD421 Analog Devices, AD421 Datasheet - Page 3

• Manufacturer Part Number: AD421
• Description: Loop-Powered 4-20 mA DAC
• Manufacturer: Analog Devices

Specifications of AD421

• Resolution (bits): 16bit
• Dac Update Rate: 125SPS
• Dac Settling Time: 8ms
• Max Pos Supply (v): +5.05V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Ser

REV. C
TIMING CHARACTERISTICS
Parameter
t
t
t
t
t
t
t
t
t
NOTES
1
2
3
Specifications subject to change without notice.
Guaranteed by characterization at initial product release, not production tested.
See Figures 1 and 2.
All input signals are specified with tr = tf = 5 ns (10% to 90% of V
CK
CL
CH
DW
DS
DH
LD
LL
LH
input.
CLOCK
LATCH
DATA
CLOCK
LATCH
DATA
Figure 1. Serial Interface Waveforms (Normal Data Load)
(B Versions)
100
50
50
30
30
0
50
50
50
1, 2, 3
1
0
Figure 2. Serial Interface Timing Diagram
1 1
(V
CC
= +3 V to +5 V, T
0 0
CC
) and timed from a voltage level of (V
1
WORD "N"
t
0
C L
t
D S
–3–
0
t
A
D W
1
t
= T
C K
1
MIN
t
1
D H
to T
t
Units
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
C H
0
t
MAX
L D
0
t
LL
unless otherwise noted)
1 1
IN
+ V
IL
)/2; tr and tf should not exceed 1 µs on any digital
t
1
WORD "N +1"
L H
0
0
1
Conditions/Comments
Data Clock Period
Data Clock Low Time
Data Clock High Time
Data Stable Width
Data Setup Time
Data Hold Time
Latch Delay Time
Latch Low Time
Latch High Time
AD421