Datasheet

AD5678
Rev. C | Page 15 of 28
6
V
LOGIC
(V)
I
DD
(mA)
8
0
1
5
6
7
2
3
4
012345
05299-029
V
DD
= 5V
V
DD
= 3V
T
A
= 25°C
Fi e gure 29. Supply Current vs. Logic Input Voltag
05299-030
TIME BASE = 4μs/DIV
V
DD
= V
REF
= 5V
T
A
= 25°C
FULL-SCALE CODE CHANGE
0x0000 TO 0xFFFF
OUTPUT LOADED WITH 2kΩ
AND 200pF TO GND
V
OUT
= 909mV/DIV
1
Figure 30. Full-Scale Settling Time, 5 V
05299-031
CH1 2.0V CH2 500mV M100μs 125MS/s
A CH1 1.28V
8.0ns/pt
V
DD
= V
REF
= 5V
T
A
= 25°C
V
OUT
V
DD
1
2
MAX(C2)*
420.0mV
Figure 31. Power-On Reset to 0 V
05299-032
CH1 2.0V CH2 1.0V M100μs 125MS/s
A CH1 1.28V
8.0ns/pt
V
DD
= V
REF
= 5V
T
A
= 25°C
V
OUT
V
DD
1
2
Fig le ure 32. Power-On Reset to Midsca
05299-033
V
DD
= 5V
SYNC
SLCK
V
OUT
1
3
CH1 5.0V
CH3 5.0V
CH2 500mV M400ns A CH1 1.4V
2
Figure 33. Exiting Power-Down to Midscale
SAMPLE
V
OUT
(V)
2.505
2.485
0 512
05299-034
64 128 192 256 320 384 448
V
DD
= 5V
V
REFOUT
= 2.5V
T
A
= 25°C
4ns/SAMPLE NUMBER
GLITCH IMPULSE = 3.55nV-s
1 LSB CHANGE AROUND
MIDSCALE (0x8000 TO 0x7FFF)
2.486
2.487
2.488
2.489
2.490
2.491
2.492
2.493
2.494
2.495
2.496
2.497
2.498
2.499
2.500
2.501
2.502
2.503
2.504
Figure 34. Digital-to-Analog Glitch Impulse (Negative)