Datasheet

ADN2817/ADN2818 Data Sheet
Rev. E | Page 8 of 40
BIT ERROR RATE MONITOR 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 4.
Parameter Conditions Min Typ Max Unit
BERMON Extrapolation Mode I
2
C-controlled eye profiling
Final Computed BER Accuracy
Input BER range 1 × 10
−3
to 1 × 10
−12
,
input deterministic jitter (DJ) < 0.4 UI,
DJ ceiling > 1 × 10
−2
; 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
2
3
over the range 2
18
to 2
39
2
18
2
39
UI
Pseudo BER (PBER) Measurement
Time
NUMBITS/
data rate
sec
BER Range 5 × 10
−2
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 × 10
−3
to 1 × 10
−9
,
input DJ = 0 UI, DJ ceiling > 1 × 10
−2
;
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 × 10
−3
to 1 × 10
−9
,
input DJ = 0.2 UI, DJ ceiling > 1 × 10
−2
;
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 2
27
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 kΩ 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