ADN2817/ADN2818
Data Sheet
Rev. E | Page 8 of 40
BIT ERROR RATE MONITOR SPECIFICATIONS
TA = TMIN to TMAX, VCC = VMIN to VMAX, VEE = 0 V, CF = 0.47 F, SLICEP = SLICEN = VEE, input data pattern: PRBS 223 1,
unless otherwise noted.
Table 4.
Parameter
Conditions
Min
Typ
Max
Unit
BERMON Extrapolation Mode
I2C-controlled eye profiling
Final Computed BER Accuracy
Input BER range 1 × 103 to 1 × 1012,
input deterministic jitter (DJ) < 0.4 UI,
DJ ceiling > 1 × 102; asymmetry < 0.1 UI;
requires external data processing algorithms
to implement Q factor extrapolation
±1
Decades
Number of Bits (NUMBITS)
Number of data bits to collect pseudo errors;
user programmable in increment factors of
23 over the range 218 to 239
218
239
UI
Pseudo BER (PBER) Measurement
Time
NUMBITS/
data rate
sec
BER Range
5 × 102
BER
Sample Phase Adjust Resolution
6
Degrees
Sample Phase Adjust Accuracy
<6
Degrees
Sample Phase Adjust Range
With respect to normal sampling instant
0.5
+0.5
UI
Minimum Input Signal Level
Differential peak to peak
4
mV
Power Increase
BER enabled
160
mW
BER standby
77
mW
BERMON Voltage Output Mode
Analog voltage output
BER Accuracy
Input BER range 1 × 103 to 1 × 109,
input DJ = 0 UI, DJ ceiling > 1 × 102;
asymmetry = 0 UI; BER is read as a voltage on
the VBER pin, when the BER mode pin = VEE
±1
Decades
Input BER range 1 × 103 to 1 × 109,
input DJ = 0.2 UI, DJ ceiling > 1 × 102;
asymmetry = 0 UI; BER is read as a voltage on
the VBER pin, when the BER mode pin = VEE
+1/2
Decades
NUMBITS
Number of data bits to collect pseudo errors
227
UI
Measurement Time
2.5 Gbps
0.054
sec
1 Gbps
0.134
sec
155 Mbps
0.865
sec
10 Mbps
1.34
sec
VBER Voltage Range
Via 3 k resistor to VEE
0.1
0.9
V
Minimum Input Signal Level
Differential peak to peak
4
mV
Power Increase
BER voltage mode
160
mW
Sample Phase Adjust Mode
Sample Phase Adjust Step Size
Monotonic
6
Degrees
Sample Phase Adjust Accuracy
<6
Degrees
Sample Phase Adjust Range
With respect to normal sampling instant
0.5
+0.5
UI
Power Increase
160
mW