Data Sheet ADN2804
Rev. D | Page 3 of 24
SPECIFICATIONS
T
A
= T
MIN
to T
MAX
, VCC = V
MIN
to V
MAX
, VEE = 0 V, C
F
= 0.47 µF, SLICEP = SLICEN = VEE, input data pattern: PRBS 2
23
− 1,
unless otherwise noted.
Table 1.
Parameter Conditions Min Typ Max Unit
QUANTIZER—DC CHARACTERISTICS
Input Voltage Range @ PIN or NIN, dc-coupled 1.8 2.8 V
Peak-to-Peak Differential Input PIN − NIN 2.0 V
Input Common-Mode Level DC-coupled (see Figure 27, Figure 28, and Figure 29) 2.3 2.5 2.8 V
Differential Input Sensitivity 2
23
− 1 PRBS, ac-coupled,
1
BER = 1 × 10
–10
6 3.3 mV p-p
Input Offset 500 µV
Input RMS Noise BER = 1 × 10
–10
290 µV rms
QUANTIZER—AC CHARACTERISTICS
Data Rate 622 Mbps
Output Clock Range Locked to 622 Mbps input data 622 MHz
S11 @ 622 MHz −15 dB
Input Resistance Differential 100 Ω
Input Capacitance 0.65 pF
QUANTIZER—SLICE ADJUSTMENT
Gain SLICEP − SLICEN = ±0.5 V 0.10 0.11 0.13 V/V
Differential Control Voltage Input SLICEP − SLICEN −0.95 +0.95 V
Control Voltage Range DC level @ SLICEP or SLICEN VEE 0.95 V
Slice Threshold Offset 1 mV
LOSS-OF-SIGNAL (LOS) DETECT
Loss-of-Signal Detect Range (see Figure 6) R
THRESH
= 0 Ω 14.9 16.7 18.4 mV
R
THRESH
= 100 kΩ 2.6 3.5 4.4 mV
Hysteresis (Electrical) OC-12
R
THRESH
= 0 Ω 6.2 6.9 7.7 dB
R
THRESH
= 100 kΩ 4.1 6.1 8.1 dB
LOS Assert Time DC-coupled
2
500 ns
LOS Deassert Time DC-coupled
2
400 ns
LOSS-OF-LOCK (LOL) DETECT
VCO Frequency Error for LOL Assert With respect to nominal 1000 ppm
VCO Frequency Error for LOL Deassert
LOL Response Time OC-12 200 µs
ACQUISITION TIME
Lock to Data Mode OC-12 2.0 ms
Optional Lock to REFCLK Mode 20.0 ms
DATA RATE READBACK ACCURACY
Fine Readback In addition to REFCLK accuracy
OC-12 100 ppm
POWER SUPPLY CURRENT Locked to 622.08 Mbps 128 mA
OPERATING TEMPERATURE RANGE –40 +85 °C
1
PIN and NIN should be differentially driven and ac-coupled for optimum sensitivity.
2
When ac-coupled, the LOS assert and deassert times are dominated by the RC time constant of the ac coupling capacitor and the 50 Ω input termination of the
ADN2804 input stage.
