HMC674LC3C
v00.1207
10 GHz Latched Comparator
with RSPECL Output Stage
COMPARATORS - SMT
6
Typical Applications
Features
The HMC674LC3C is ideal for:
Propagation Delay: 130 ps
• ATE Applications
Overdrive & Slew Rate Dispersion: 10 ps
• High Speed Instrumentation
Minimum Pulse Width: 60 ps
• Digital Receiver Systems
Resistor Programmable Hysteresis
• Pulse Spectroscopy
Differential Latch Control
• High Speed Trigger Circuits
Active Gain: 53 dB
• Clock & Data Restoration
Power Dissipation: 180 mW
RSCML and RSECL Versions Available
16 Lead Ceramic 3x3mm SMT Package: 9mm 2
Functional Diagram
General Description
The HMC674LC3C is a SiGe monolithic, ultra fast
comparator which features reduced swing PECL output
drivers and latch inputs. The comparator supports 10
Gbps operation while providing 130 ps propagation
delay and 60 ps minimum pulse width with 0.8 ps rms
random jitter (RJ). Overdrive and slew rate dispersion
are typically 10 ps, making the device ideal for a
wide range of applications from ATE to broadband
communications. The reduced swing PECL output
stages are designed to directly drive 400 mV into 50
Ohms terminated to Vcco - 2V while maintaining
compatibility with other PECL logic families. The
HMC674LC3C features high speed latch and
programmable hysteresis and may be configured
to operate in either latch mode, or as a tracking
comparator.
Electrical Specifi cations
TA = +25C Vcci= +3.3V, Vcco = +3.3V, LE/ LE = Vcci – 0.8V to Vcci – 1.8V, Vee = -3V
Max
Units
Input Voltage Range
Parameter
Conditions
-1.75
1.75
V
Input Differential Voltage
-1.75
1.75
V
Typ.
Input Offset Voltage
±5
mV
Input Offset Voltage, Temperature Coefficient
15
μV / °C
Input Bias Current
15
uA
Input Bias Current Temperature Coefficient
50
nA / °C
Input Offset Current
4
μA
Input Impedance
50
Ω
Common Mode Input Impedance
350
KΩ
Differential Input Impeadance
15
KΩ
Active Gain
53
dB
Common Mode Rejection Ratio
Hysteresis
6 - 24
Min.
Rhys = ∞
80
dB
±1
mV
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
HMC674LC3C
v00.1207
10 GHz Latched Comparator
with RSPECL Output Stage
Latch Enable Characteristics
Conditions
Min.
Each Pin
Typ.
Max
8
Units
KΩ
Latch to Output Delay, tPDOL , tPDOH
VOD = 200 mV
70
ps
Latch Minimum Pulse Width, tPL
VOD = 200 mV
20
ps
Latch Enable Input Range
VOD = 200 mV
Latch Setup Time, ts
VOD = 200 mV
Vcci - 1.8
Latch Hold Time, tH
Vcci - 0.8
V
45
ps
-42
ps
DC Output Characteristics, Vcco = 0V with 50Ω to Vcco - 2V
Parameter
Conditions
Min.
Typ.
Max
Units
Output Voltage High Level, Voh
Vcco - 0.846
Output Voltage Low Level, Vol
Vcc0 - 1.244
V
400
mV
Output Voltage Differential Swing
V
AC Performance
Parameter
Conditions
Propagation Delay - tPD, tPDL , tPDH
Min.
VOD = 500 mV
Typ.
Max
Units
130
ps
0.45
ps / °C
VOD - 500 mV
10
ps
50mV < VOD < 1V
10
ps
VOD = 500 mV
8
ps
Noise (RTI)
2.4
nV/√(Hz) RTI
Equivalent Input Bandwidth [1]
9.7
GHz
Deterministic Jitter at 10 Gbps
with ±100mV Overdrive
10
ps
Random Jitter at 10 Gbps
with ±100mV Overdrive
0.8
ps rms
VCM = 0; ±100mV Overdrive
60
ps
Q / QB Rise Time
From 20% to 80%
54
ps
Q / QB Fall Time
From 20% to 80%
27
ps
Propagation Delay, Temperature Coefficient
Propagation Delay Skew
(Rising to Falling Transition)
VOD Dispersion
Tpd vs. Common Mode Dispersion,
-1.75V <Vcm <1.75V
Deterministic Jitter (pp)
Random Jitter (rms)
Minimum Pulse Width
6
COMPARATORS - SMT
Parameter
Latch Enable Input Impedance
Power Supply Requirements
Parameter
Conditions
Min.
Typ.
Max
Units
Input Supply Current, Icci
8
mA
Output Supply Current, Icco
47
mA
Vee Current, lee
16
mA
Power Dissipation, Pd
180
mW
PSRR, Vcci
38
dB
PSRR, Vee
38
dB
Note 1: Equivalent Input Bandwidth is calculated with the following formula: Bweq=0.22/√ (TRCOMP2-TRIN2) where TRIN is the 20%/80% transition time of a quasi-Gaussian signal applied to the comparator input, and TRCOMP is the effective transition time digitized by the comparator.
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
6 - 25
HMC674LC3C
v00.1207
10 GHz Latched Comparator
with RSPECL Output Stage
Dispersion vs. Overdrive Voltage
6
Propagation Delay vs. Common Mode
11
15
12.5
9
ΔtPD
DISPERSION (ps)
5
7.5
Rising Edge
Falling Edge
5
2.5
3
0
1
-2.5
-5
-1
0
10
20
30
40
50
60
70
80
90
100
-2
20
2.6
16
HYSTERESIS (mV)
2.8
2.4
VOH
VOL
2
1.8
-45
-1
-0.5
0
0.5
1
2
12
8
4
0
-32
-19
-6
7
20
33
46
59
72
85
10
100
1000
RESISTANCE (Ohm)
TEMPERATURE (C)
Eye Diagram
6 - 26
1.5
Comparator Hysteresis
vs. Rhys Control Resistor
Output Voltage vs. Temperature
2.2
-1.5
COMMON MODE VOLTAGE (mV)
OVERDRIVE VOLTAGE (mV)
VOLTAGE (Volts)
COMPARATORS - SMT
10
Rising Edge
Falling Edge
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
10000
HMC674LC3C
v00.1207
10 GHz Latched Comparator
with RSPECL Output Stage
Timing Diagram
COMPARATORS - SMT
6
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
6 - 27
HMC674LC3C
v00.1207
10 GHz Latched Comparator
with RSPECL Output Stage
Absolute Maximum Ratings
COMPARATORS - SMT
6
Input Supply Voltage (Vcci to GND)
-0.5V to +4V
Output Supply Voltage (Vcco to GND)
-0.5V to +4V
Positive Supply Differential (Vcci - Vcco)
-0.5V to +3V
Input Voltage
-2V to +2V
Differential Input Voltage
-2V to +2V
Input Voltage, Latch Enable
-0.5V to Vcci +0.5V
Applied Voltage (HYS)
Vee to GND
Maximum Input Current
±1 mA
Output Current
40 mA
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. PADDLE MUST BE SOLDERED TO Vee
6 - 28
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
HMC674LC3C
v00.1207
10 GHz Latched Comparator
with RSPECL Output Stage
Pin Descriptions
Function
Description
1
VTP
Termination resistor return pin for Vp Input.
2
INP
Non-Inverting analog input
3
INN
Inverting analog input
4
VTN
Termination resistor return pin for Vn input
5, 16
Vcci
Positive supply voltage input stage.
6
LE
Latch enable input pin, inverting side.
7
LE
Latch enable input pin, non-inverting side.
8
N/C
This pin should be left floating
9, 12
Vcco
Positive supply voltage for the RSPECL output stage.
Q
Inverting output. Q bar is at logic low if the analog voltage
at the non-inverting input, INP, is greater than the analog
voltage at the inverting input, INN, provided that the
comparator is in compare mode. Refer to the LE/LE bar
descriptions (pins 6, 7) for more information.
Q
Non-inverting output. Q is at logic high if the analog voltage
at the non-inverting input, INP, is greater than the analog
voltage at the inverting input, INN, provided that the
comparator is in compare mode. Refer to the LE/LE bar
descriptions (pins 6, 7) for more information.
14
HYS
Hysteresis Control pin. This pin should be left disconnected
for zero hysteresis. Connect to GND with a resistor to
add the desired amount of hysteresis. Refer to Figure x.
to determine the correct sizing of Rhys hysteresis control
resistor.
13
Vee
Negative power supply, -3V.
15
RTN
Return for ESD protection.
Package Base
Exposed paddle must be connected to Vee
10
11
Interface Schematic
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
6
COMPARATORS - SMT
Pin Number
6 - 29
HMC674LC3C
v00.1207
10 GHz Latched Comparator
with RSPECL Output Stage
Evaluation PCB
COMPARATORS - SMT
6
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 and exposed paddle should be connected directly to
the ground plane similar to that shown. A sufficient number of via holes should be used to connect the top and
bottom ground planes in order to provide good RF grounding to 10 GHz. The evaluation circuit board shown is
available from Hittite upon request.
6 - 30
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
HMC674LC3C
v00.1207
10 GHz Latched Comparator
with RSPECL Output Stage
Notes:
COMPARATORS - SMT
6
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
6 - 31