Datasheet
DYNAMIC SPECIFICATIONS
P
arameter Min Typ Max Units
DYNAMIC PERFORMANCE
Maximum Output Update Rate (f
CLOCK
) 100 125 MSPS
Output Settling Time (t
ST
) (to 0.1%)
1
35 ns
Output Propagation Delay (t
PD
)1ns
Glitch Impulse 5 pV-s
Output Rise Time (10% to 90%)
1
2.5 ns
Output Fall Time (10% to 90%)
1
2.5 ns
Output Noise (I
OUTFS
= 20 mA) 50 pA/√Hz
Output Noise (I
OUTFS
= 2 mA) 30 pA/√Hz
AC LINEARITY TO NYQUIST
Signal-to-Noise and Distortion Ratio
f
CLOCK
= 10 MSPS; f
OUT
= 1.00 MHz 50 dB
f
CLOCK
= 50 MSPS; f
OUT
= 1.00 MHz 50 dB
f
CLOCK
= 50 MSPS; f
OUT
= 12.51 MHz 48 dB
f
CLOCK
= 100 MSPS; f
OUT
= 5.01 MHz 50 dB
f
CLOCK
= 100 MSPS; f
OUT
= 25.01 MHz 45 dB
Total Harmonic Distortion
f
CLOCK
= 10 MSPS; f
OUT
= 1.00 MHz –67 dBc
f
CLOCK
= 50 MSPS; f
OUT
= 1.00 MHz –67 –62 dBc
f
CLOCK
= 50 MSPS; f
OUT
= 12.51 MHz –59 dBc
f
CLOCK
= 100 MSPS; f
OUT
= 5.01 MHz –64 dBc
f
CLOCK
= 100 MSPS; f
OUT
= 25.01 MHz –48 dBc
Spurious-Free Dynamic Range to Nyquist
f
CLOCK
= 10 MSPS; f
OUT
= 1.00 MHz 68 dBc
f
CLOCK
= 50 MSPS; f
OUT
= 1.00 MHz 62 68 dBc
f
CLOCK
= 50 MSPS; f
OUT
= 12.51 MHz 63 dBc
f
CLOCK
= 100 MSPS; f
OUT
= 5.01 MHz 67 dBc
f
CLOCK
= 100 MSPS; f
OUT
= 25.01 MHz 50 dBc
NOTES
1
Measured single ended into 50 Ω load.
Specifications subject to change without notice.
DIGITAL SPECIFICATIONS
P
arameter Min Typ Max Units
DIGITAL INPUTS
Logic “1” Voltage @ DVDD = +5 V 3.5 5 V
Logic “1” Voltage @ DVDD = +3 V 2.1 3 V
Logic “0” Voltage @ DVDD = +5 V 0 1.3 V
Logic “0” Voltage @ DVDD = +3 V 0 0.9 V
Logic “1” Current –10 +10 µA
Logic “0” Current –10 +10 µA
Input Capacitance 5pF
Input Setup Time (t
S
)2.0ns
Input Hold Time (t
H
)1.5ns
Latch Pulsewidth (t
LPW
)
3.5 ns
Specifications subject to change without notice.
0.1%
0.1%
t
S
t
H
t
LPW
t
PD
t
ST
DB0–DB7
CLOCK
IOUTA
OR
IOUTB
Figure 1. Timing Diagram
(T
MIN
to T
MAX
, AVDD = +5 V, DVDD = +5 V, I
OUTFS
= 20 mA, Single-Ended Output, IOUTA, 50 ⍀ Doubly
Terminated, unless otherwise noted)
AD9708
–3–
REV. B
(T
MIN
to T
MAX
, AVDD = +5 V, DVDD = +5 V, I
OUTFS
= 20 mA unless otherwise noted)