HMC720LC3C
v00.0808
13 Gbps, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
HIGH SPEED LOGIC - SMT
7
Typical Applications
Features
The HMC720LC3C is ideal for:
Inputs Terminated Internally in 50 Ohms
• RF ATE Applications
Differential Inputs are DC Coupled
• Broadband Test & Measurement
Propagation Delay: 120 ps
• Serial Data Transmission up to 13 Gbps
Fast Rise and Fall Times: 19 / 18 ps
• Clock Buffering up to 13 GHz
Programmable Differential
Output Voltage Swing: 600 - 1100 mV
Power Dissipation: 300 mW
16 Lead Ceramic 3x3mm SMT Package: 9mm 2
Functional Diagram
General Description
The HMC720LC3C is a 1:2 Fanout Buffer designed to
support data transmission rates up to 13 Gbps, and
clock frequencies as high as 13 GHz. All differential
inputs and outputs are DC coupled and terminated on
chip with 50 Ohm resistors to ground. The outputs may
be used in either single-ended or differential modes,
and should be AC or DC coupled into 50 Ohm resistors
connected to ground.
The HMC720LC3C also features an output level control
pin, VR which allows for loss compensation or for signal
level optimization. The HMC720LC3C operates from a
single -3.3V DC supply and is available in a ceramic
RoHS compliant 3x3 mm SMT package.
Electrical Specifi cations, TA = +25ºC Vee = -3.3V
Parameter
Conditions
Power Supply Voltage
Min.
Typ.
Max
-3.6
-3.3
-3.0
Units
V
Power Supply Current
90
mA
Maximum Data Rate
13
Gbps
Maximum Clock Rate
13
GHz
Input High Voltage
-0.5
0.5
V
Input Low Voltage
-1.0
0.0
V
Input Return Loss
Frequency <13 GHz
10
dB
Single-Ended, peak-to-peak
550
mVpp
Differential, peak-to-peak
1100
mVpp
Output High Voltage
-10
mV
Output Low Voltage
-570
mV
19 / 18
ps
Output Amplitude
Output Rise / Fall Time
7 - 58
Single-Ended, 20% - 80%
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC720LC3C
v00.0808
13 Gbps, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Electrical Specifi cations, (continued)
Conditions
Min.
Typ.
Frequency <13 GHz
Small Signal Gain
dB
dB
rms
δ - δ, 215 -1 PRBS input [1]
Deterministic Jitter, JD
2
Propagation Delay, td
[1] Deterministic jitter measured at 13 GHz with a 300 mVpp,
215 -1
DC Current vs. Supply Voltage [1] [2]
0.2
ps rms
6
ps
120
ps
0
ps
D1 to D2 Data Skew, tSKEW
PRBS input sequence.
Output Differential vs. Supply Voltage [1] [3]
1200
105
DIFFERENTIAL VOLTAGE (mV)
110
+25C
+85C
-40C
100
DC CURRENT (mA)
Units
27
Random Jitter JR
95
90
85
80
75
70
-3.7
-3.6
-3.5
-3.4
-3.3
-3.2
-3.1
-3
1100
1000
900
700
-3.7
-2.9
+25C
+85C
-40C
800
-3.6
-3.5
-3.4
Output Differential vs. VR [3]
-3.1
-3
-2.9
1300
DIFFERENTIAL VOLTAGE (mV)
1100
+25C
+85C
-40C
1000
900
800
700
600
500
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
VR (V)
[1] VR = 0.0V
-3.2
Output Differential vs. Frequency [1]
1200
-1.2
-3.3
7
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
DIFFERENTIAL VOLTAGE (mV)
Max
10
HIGH SPEED LOGIC - SMT
Parameter
Output Return Loss
[2] Frequency = 13 GHz
1200
1100
1000
900
800
700
600
2
4
6
8
10
12
14
16
FREQUENCY (GHz)
[3] Frequency = 10 GHz
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
7 - 59
HMC720LC3C
v00.0808
13 Gbps, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
18
18
RISE/FALL TIME (ps)
20
16
14
tr
tf
12
-3.6
-3.5
-3.4
-3.3
-3.2
-3.1
-3
16
tr
tf
14
12
10
-1.2
-2.9
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
VR (V)
SUPPLY VOLTAGE (V)
Input Return Loss vs. Frequency
Output Return Loss vs. Frequency
0
-15
-5
RETURN LOSS (dB)
-10
-20
-25
-30
-35
-10
-15
-20
-25
-40
0
2
4
6
8
10
FREQUENCY (GHz)
[1] VR = 0.0V
7 - 60
Rise / Fall Time vs. VR [2]
20
10
-3.7
RETURN LOSS (dB)
HIGH SPEED LOGIC - SMT
7
RISE/FALL TIME (ps)
Rise / Fall Time vs. Supply Voltage [1] [2]
12
14
-30
0
2
4
6
8
10
FREQUENCY (GHz)
[2] Frequency = 13 GHz
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
12
14
HMC720LC3C
v00.0808
13 Gbps, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Eye Diagram
7
HIGH SPEED LOGIC - SMT
[1] Test Conditions:
Pattern generated with an Agilent N4903A Serial BERT.
Eye Diagram presented on a Tektronix CSA 8000.
Device input = 10 Gbps PN code, Vin = 300mVp-p differential.
Both output channels shown.
Timing Diagram
Truth Table
Input
Outputs
DIN
D1
L
L
L
H
H
H
Notes:
DIN = DINP - DINN
D1 = D1P - D1N
D2 = D2P - D2N
D2
H - Positive differential voltage
L - Negative differential voltage
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
7 - 61
HMC720LC3C
v00.0808
13 Gbps, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Absolute Maximum Ratings
HIGH SPEED LOGIC - SMT
7
Power Supply Voltage (Vee)
-3.75V to +0.5V
Input Signals
-2V to +0.5V
Output Signals
-1.5V to +1V
Storage Temperature
-65°C to +150°C
Operating Temperature
-40°C to +85°C
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
NOTES:
1. PACKAGE BODY MATERIAL: ALUMINA
2. LEAD AND GROUND PADDLE PLATING:
30-80 MICROINCHES GOLD OVER 50 MICROINCHES MINIMUM NICKEL.
3. DIMENSIONS ARE IN INCHES [MILLIMETERS].
4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm DATUM -C6. ALL GROUND LEADS MUST BE SOLDERED TO PCB RF GROUND.
7. GROUND PADDLE MUST BE SOLDERED TO Vee.
7 - 62
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC720LC3C
v00.0808
13 Gbps, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Pin Descriptions [1]
Pin Number
Function
Description
1, 4, 5, 8, 9, 12
GND
Signal Grounds
Interface Schematic
2, 3
D1P.
D1N
Clock / Data Output Port 1
6, 7
DINP, DINN
Clock / Data Inputs
10, 11
D2N
D2P
Clock / Data Output Port 2
13, 16
GND
Supply Ground
14
VR
Output level control. Output level may be adjusted by
either applying a voltage to VR per “Output Differential
vs. VR” plot, or by tying VR to GND with a resistor per the
following equation: V0(R) = 1.2 / (2.1 + R), R in kΩ
15, Package
Base
Vee
Negative Supply
HIGH SPEED LOGIC - SMT
7
[1] Contact HMC for alternate pinouts
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
7 - 63
HMC720LC3C
v00.0808
13 Gbps, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Evaluation PCB
HIGH SPEED LOGIC - SMT
7
Item
Description
J1
D1P
J2
D1N
J3
DINP
J4
DINN
J5
D2N
J6
D2P
J7
Vee
J8
VR
J9
GND
List of Materials for Evaluation PCB 118777 [1]
Item
Description
J1 - J6
PCB Mount SMA RF Connectors
J7 - J9
DC Pin
C1, C2
100 pF, 0402 pkg
C3, C4
4.7 μF Capacitor, Tantalum
R1
10 Ohm Resistor, 0603 Pkg.
U1
HMC720LC3C
High Speed Logic, Fanout Buffer
PCB [2]
118775 Evaluation Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material:Arlon 25FR
7 - 64
The circuit board used in the final application should use RF circuit design techniques. Signal lines
should have 50 ohm impedance while the package
ground leads should be connected directly to the
ground plane similar to that shown. The exposed
packaged base should be connected to Vee. A
sufficient number of via holes should be used to
connect the top and bottom ground planes. The
evaluation circuit board shown is available from
Hittite upon request.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC720LC3C
v00.0808
13 Gbps, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Application Circuit
HIGH SPEED LOGIC - SMT
7
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
7 - 65