AD808–SPECIFICATIONS (T = T to T , V = V to V , C = 0.47 F, unless otherwise noted)
A
MIN
MAX
S
MIN
MAX
D
P aram eter
Condition
Min
Typ
Max
Units
QUANT IZER–DC CHARACT ERIST ICS
Input Voltage Range
Input Sensitivity, VSENSE
Input Overdrive, VOD
Input Offset Voltage
Input Current
Input RMS Noise
Input Peak-to-Peak Noise
@ PIN or N IN
2.5
10
5
VS
V
PIN–NIN, Figure 1, BER = ≤ 1 × 10–10
Figure 1, BER = ≤ 1 × 10–10
4.0
2.0
1.0
10
100
1.5
mV
mV
mV
µA
µV
mV
BER = ≤ 1 × 10–10
BER = ≤ 1 × 10–10
QUANT IZER–AC CHARACT ERIST ICS
Upper –3 dB Bandwidth
Input Resistance
600
800
10
2
MHz
kΩ
pF
Input Capacitance
Pulsewidth Distortion
50
ps
LEVEL DET ECT
Level Detect Range
RT HRESH = 22.1 kΩ
RT HRESH = 6.98 kΩ
RT HRESH = 0 Ω
6.5
13
28.5
0.1
10
18
40
13.5
23
45.5
1.5
mV
mV
mV
µs
Response T ime
DC Coupled
Hysteresis (Electrical)
RT HRESH = 22.1 kΩ (See Figure 8)
RT HRESH = 6.98 kΩ
RT HRESH = 0 Ω
Load = +3.2 mA
Load = –3.2 mA
5
9.0
9.0
10.0
dB
dB
dB
V
3.0
3.0
4.0
5.1
7.0
4.7
0.2
SDOUT Output Logic High
SDOUT Output Logic Low
0.4
V
PHASE-LOCKED LOOP NOMINAL
CENT ER FREQUENCY
622.08
MHz
MHz
MHz
Degrees
ps
CAPT URE RANGE
620
620
624
624
81
T RACKING RANGE
ST AT IC PHASE ERROR (See Figure 7)
27–1 PRN Sequence
Figure 2
22
SET UP T IME (tSU
HOLD T IME (tH)
PHASE DRIFT
JIT T ER
)
550
700
900
1050
50
Figure 2
ps
240 Bits, No T ransitions
Degrees
27–1 PRN Sequence
2.5
2.5
3.6
3.6
Degrees rms
Degrees rms
223–1 PRN Sequence
JIT T ER T OLERANCE
f = 30 Hz
3000
300
3.7
0.56
0.45
Unit Intervals
Unit Intervals
Unit Intervals
Unit Intervals
Unit Intervals
f = 300 Hz
f = 25 kHz
f = 250 kHz
f = 5 MHz
24
1.7
0.28
0.18
JIT T ER T RANSFER
Peaking (Figure 14)
Bandwidth
CD = 0.47 µF
0.04
333
dB
kHz
450
Acquisition T ime
C D = 0.1 µF
C D = 0.47 µF
223–1 PRN Sequence, TA = +25°C
VCC = 5 V, VEE = GND
2 × 106
8 × 106
3 × 106
Bit Periods
12 × 106 Bit Periods
POWER SUPPLY VOLT AGE
POWER SUPPLY CURRENT
VMIN to VMAX
4.5
55
5.5
Volts
VCC = 5.0 V, VEE = GND,
T A = +25°C
80
100
mA
PECL OUT PUT VOLT AGE LEVELS
Output Logic High, VOH
Output Logic Low, VOL
T A = +25°C
Referenced to VCC
–1.2
–2.2
–1.0
–2.0
–0.7
–1.7
Volts
Volts
SYMMET RY (Duty Cycle)
ρ = 1/2, T A = +25°C,
Recovered Clock Output, Pin 5
VCC = 5 V, VEE = GND
45
55
%
OUT PUT RISE / FALL T IMES
Rise T ime (tR)
Fall T ime (tF)
20%–80%
80%–20%
174
136
350
315
500
500
ps
ps
CLOCK SKEW (tRCS
)
Positive Number Indicates Clock
Leading Data
–100
130
250
ps
Specifications subject to change without notice.
–2–
REV. 0