AD10242
N + 4
N + 5
N
N + 1
N + 2
N + 3
ENC
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
TTL CLOCK
10MHz
f
≈
ENC
A
IN
1/2
AD10242
SHOWN
3
2
A
A
IN
tA = 1.0ns TYP
tOD = 12ns TYP
IN
ENCODE
1
A
IN
DIGITAL
OUTPUTS
N – 2
N – 1
N
N + 1
N + 2
NOTE: ALL ±5V SUPPLY PINS BYPASSED
TO GND WITH A 0.1µF CAPACITOR
Figure 2. Equivalent Burn-In Circuit
Figure 1. Tim ing Diagram
DV
CC
EQ UIVALENT CIRCUITS
A
3
CURRENT
MIRROR
IN
IN
R4
200Ω
A
2
R3
100Ω
A
1
IN
R2
21Ω
DV
CC
TO AD9631
R1
79Ω
V
REF
D0 – D11
Figure 3. Analog Input Stage
AV
CC
AV
AV
CC
CC
R1
17k⍀
R1
17k⍀
CURRENT
MIRROR
ENCODE
ENCODE
TIMING
CIRCUITS
R2
8k⍀
R2
8k⍀
Figure 5. Digital Output Stage
Figure 4. Encode Inputs
REV. A
–7–