iT4036F
120-ps Wideband Phase Delay
Description
The iT4036F is an ultra-wideband phase delay with an ECL topology to ensure high-speed
operation that accepts either single-ended or differential data input. Its high output voltage, excellent
rise and fall times, and high eye diagram quality at data rates up to 12.5 Gb/s make the iT4036F
suitable for timing adjustment in data and clock distribution at very high speed. Complex digital
applications benefit from the iT4036F, including clock data recovery, edge detectors, NRZ-to-RZ
converters, MUX/DEMUX, and data restoration.
The device features a single delay element that provides up to 120-ps delay. Delay control can be
either differential (using both VCp and VCm) or single-ended (VCm is the active control pad while
VCp is shorted to VCref). The control voltage range for the delay input is from -1.3 V to -1.9 V
whether the control is single-ended or differential. The device can delay NRZ streams with data
rates up to 12.5 Gb/s or a clock signal up to 12.5 GHz. Both inputs and outputs are DC-coupled. At
the input side, internal 50-ohm resistors avoid the need for external impedance matching
terminations. The iT4036F is housed in a 5x5-mm RoHS-6-compliant QFN package.
Features
¾
¾
¾
¾
¾
¾
¾
¾
¾
Ultra wideband: Up to 12.5 Gb/s NRZ
Delay adjustment up to 120 ps
450 mVpp single-ended output
Low RMS jitter degradation
Output rise time (20% – 80 %): <24 ps
Output fall time (20% – 80 %): <22 ps
50-ohm matched DC-coupled inputs and outputs
Differential or single-ended I/O
Power consumption: 560 mW
¾ 5x5-mm RoHS-6-compliant QFN package
Device Diagram
Timing Diagram
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
1
iT4036F
120-ps Wideband Phase Delay
Absolute
Maximum
Ratings
Symbol
Parameters/conditions
Min.
Max.
Units
VEE
Power supply voltage
-4.0
0
V
VIH
Input voltage level, high level
-1.5
0.8
V
VIL
Input voltage level, low level
-1.1
0.4
V
VC
Delay control voltage
-3.0
0
V
TA
Operating temperature range – die
-15
125
°C
TSTG
Storage temperature
-65
150
°C
Stresses above those listed
under Absolute Maximum
Ratings may cause
permanent damage to the
device. This is a stress
rating only; functional
operation of the device at
these or any other
conditions above those
indicated in the operational
section of this document is
not implied. Exposure to
absolute maximum rating
conditions for extended
periods may affect device
reliability.
Recommended
Operating
Conditions
Electrical
Characteristics
At ambient temperature
and Vee = -3.3 V
1. With a single-ended
input, the unused pad
must be tied to VINDC.
2. With a single-ended
output, the unused pad
must be terminated with
50 ohms to ground.
Symbol
Parameters/conditions
TA
Operating temperature range – die
VEE
Power supply voltage
VC
Delay control voltage
VIH
Input voltage level, high level (single ended)
0.0
V
VIL
Input voltage level, low level (single ended)
-0.4
V
VINDC
DC input voltage (with DC-coupled input)
-0.2
V
Symbol
Parameters
Min.
Typ.
0
Max
85
-3.3
-1.9
Units
°C
V
-1.3
V
Min.
Typ.
Max.
Units
-3.30
-3.13
V
VEE
Power supply voltage
-3.46
VIH
Input voltage level, high level (single ended)
-0.6
0.0
0.2
V
VIL
Input voltage level, low level (single ended)
-1
-0.4
-0.2
V
VINDC
DC input voltage (with DC-coupled input) (1)
-0.8
-0.2
0
V
VOUT
Data output voltage amplitude (2)
0.38
0.40
0.42
V
TR
Output rise time (20% – 80%)
23
24
25
ps
TF
Output fall time (20% – 80%)
19
21
23
ps
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
2
iT4036F
120-ps Wideband Phase Delay
Electrical
Characteristics
(cont.)
Symbol
Parameters
Min.
Typ.
Max.
Units
TADJ
Output phase delay adjustment
120
ps
S11
Input return loss (up to 15 GHz)
Tbd
dB
S22
Output return loss (up to 15 GHz)
Tbd
dB
FMAX
Maximum clock frequency
12.5
GHz
IEE
Power supply current
160
170
180
mA
PD
Power dissipation
0.52
0.56
0.59
W
Eye Diagram
Performance
Through eye at 12.5 Gb/s
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
3
iT4036F
120-ps Wideband Phase Delay
Eye Diagram
Performance
(cont.)
Evaluation board
measurement at
Vee = -3.3 V.
Single-ended input:
450 mVpp
Input data rate: 12.5 Gb/s
Control voltage: VCp = VCref, VCm = -1.6 V
Jitter degredation : 1.1
(Delay 50 ps, 225 deg.)
Input data rate: 12.5 Gb/s
Control voltage: VCp = VCref, VCm = -1.9 V
Jitter degredation : 0.6
(delay 120 ps, 540 deg.)
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
4
iT4036F
120-ps Wideband Phase Delay
Eye Diagram
Performance
(cont.)
Evaluation board
measurement at
Vee = -3.3 V.
Single-ended input:
450 mVpp
Input data rate: 10.7 Gb/s
Control voltage: VCp = VCref, VCm = -1.6 V
Jitter degradation : 0.5
(Delay 0 ps, 0 deg.)
Input data rate: 10.7 Gb/s
Control voltage: VCp = VCref, VCm = -1.9 V
Jitter degradation : 0.2
(Delay 15 ps, 57 deg.)
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
5
iT4036F
120-ps Wideband Phase Delay
Eye Diagram
Performance
(cont.)
EVB measurement
at Vee = -3.3 V
Clock signal at 12.5 GHz
Single-ended data input: +/-200 mVpp
Clock signal at 11.5 GHz
Single-ended data input: +/-200 mVpp
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
6
iT4036F
120-ps Wideband Phase Delay
Eye Diagram
Performance
(cont.)
Evaluation board
measurement
at Vee = -3.3 V
Clock signal at 10.7 GHz
Single-ended data input: +/-200 mVpp
Clock signal at 9 GHz
Single-ended data input: +/-200 mVpp
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
7
iT4036F
120-ps Wideband Phase Delay
Eye Diagram
Performance
(cont.)
Clock signal at 12.5 GHz
Single-ended data input: +/-200 mVpp
Vcm span from –1.3 V to –1.9 V
Jitter
Degradation
Jitter degradation vs Vcm
2.5
Jdeg (ps)
2
1.5
NRZ 12.5 Gb/s
NRZ 10.7 Gb/s
Clock 12.5 GHz
1
0.5
0
-1.3
-1.4
-1.5
-1.6
-1.7
-1.8
-1.9
Vcm (V)
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
8
iT4036F
120-ps Wideband Phase Delay
Temperature
Characterization
Power Supply Current
180
178
176
174
mA
172
170
168
166
164
162
160
25
45
65
85
Degrees Celsius
Output Amplitude
460
450
440
mV
430
420
410
400
390
380
370
25
45
65
85
Degrees Celsius
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
9
iT4036F
120-ps Wideband Phase Delay
Delay vs Vcm
140
120
D elay (ps)
100
80
60
40
20
0
-1.3
-1.4
-1.5
-1.6
-1.7
-1.8
-1.9
Vcm (V)
Amplitude vs GHz for clock signals
400
380
Out Am pl (m V)
360
340
320
300
280
260
240
9
10.7
11.7
12.5
Frequency (GHz)
Recommended
Operational
Setup
iT4036F
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
10
iT4036F
120-ps Wideband Phase Delay
“F” Package
Drawing
and Pinouts
Dimensions in
inches (mm)
Except where
noted, tolerance
on dimensions is:
± (00.0039
.100 )
Pinouts
P1: Vee
P2: Din
P3: N/C
P4: Din/
P5: Vee
P6: N/C
P7: VCm
P8: VCp
P9: Vcref
P10: Vee
P11: Vee
P12: Dout
P13: N/C
P14: Dout/
P15: Vee
P16: Vee
P17: N/C
P18: N/C
P19: N/C
P20: N/C
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
11