HMC629LP4 / 629LP4E
v08.0112
Typical Applications
Features
The HMC629LP4(E) is ideal for:
3 dB LSB Steps to 45 dB
• Cellular/3G Infrastructure
Power-Up State Selection
• WiBro / WiMAX / 4G
Low Insertion Loss: 2.5 dB
• Microwave Radio & VSAT
TTL/CMOS Compatible, Serial, Parallel
or Latched Parallel Control
• IF & RF Applications
±0.25 dB Typical Step Error
TE
• Test Equipment and Sensors
Single +3V or +5V Supply
24 Lead 4x4mm SMT Package: 16mm2
Functional Diagram
General Description
LE
The HMC629LP4(E) is a broadband 4-bit GaAs IC
Digital Attenuator in a low cost leadless SMT package.
This versatile digital attenuator incorporates off-chip
AC ground capacitors for near DC operation, making
it suitable for a wide variety of RF and IF applications.
The dual mode control interface is CMOS/TTL
compatible, and accepts either a three wire serial input
or a 4-bit parallel word. For applications which require
only 33 dB of attenuation range, the HMC629LP4(E)
provides excellent attenuation accuracy up to 10 GHz.
The HMC629LP4(E) is housed in a RoHS compliant
4x4 mm QFN leadless package, and requires no
external matching components.
B
SO
Attenuators - Digital - SMT
3 dB LSB GaAs MMIC 4-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
O
Electrical Specifications,
TA = +25° C, 50 Ohm System, with Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted)
Parameter
Typ.
Max.
Units
DC - 6
2.5
5
dB
dB
Attenuation Range
DC - 6
45
dB
Return Loss (ATTIN, ATTOUT, All Atten. States)
DC - 6
17
dB
± (0.50 + 5% of Atten. Setting) Max.
dB
dB
Insertion Loss
Attenuation Accuracy: (Referenced to Insertion Loss)
All Attenuation States
1
Frequency (GHz)
Min.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price,2 delivery,
andDrive,
to place
orders: AnalogMA
Devices,
For price,
delivery
andDevices
to place
orders:
Hittite
Microwave
Elizabeth
Chelmsford,
01824Inc.,
responsibility
is assumed
by Analog
for its use,
nor for any
infringements
of patents orCorporation,
other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373
Order
at www.hittite.com
Phone: On-line
781-329-4700
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
HMC629LP4 / 629LP4E
v08.0112
3 dB LSB GaAs MMIC 4-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
Normalized Attenuation
Insertion Loss vs. Temperature
(Only Major States are Shown)
-5
-10
-15
-20
-30
-40
-50
-60
0
2
4
6
8
10
0
2
Input Return Loss
6
8
10
8
10
Output Return Loss
(Only Major States are Shown)
(Only Major States are Shown)
0
0
-5
-5
-10
-20
-25
-30
-40
0
B
SO
-15
-35
2
4
6
8
-10
-15
-20
-25
-30
-35
-40
10
0
2
FREQUENCY (GHz)
O
6
(1, 2, 4, 5) GHz
6
6
(Only Major States are Shown)
10
8
4
FREQUENCY (GHz)
Bit Error vs. Frequency
Bit Error vs. Attenuation State
4
4
BIT ERROR (dB)
BIT ERROR (dB)
4
FREQUENCY (GHz)
LE
FREQUENCY (GHz)
RETURN LOSS (dB)
-20
TE
+25 C
+85 C
-40 C
-10
2
0
-2
-4
2
0
-2
BIT 24
(7, 8, 10) GHz
-6
Attenuators - Digital - SMT
NORMALIZED ATTENUATION (dB)
0
RETURN LOSS (dB)
INSERTION LOSS (dB)
0
-4
-8
ALL BITS
-10
-6
0
5
10
15
20
25
30
ATTENUATION STATE (dB)
35
40
45
0
2
4
6
8
10
FREQUENCY (GHz)
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price,2 delivery,
andDrive,
to place
orders: AnalogMA
Devices,
For price,
delivery
andDevices
to place
orders:
Hittite
Microwave
Elizabeth
Chelmsford,
01824Inc.,
responsibility
is assumed
by Analog
for its use,
nor for any
infringements
of patents orCorporation,
other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373
Order
at www.hittite.com
Phone: On-line
781-329-4700
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
2
HMC629LP4 / 629LP4E
v08.0112
3 dB LSB GaAs MMIC 4-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
Step Error vs. Frequency
Normal Relative Phase vs. Frequency
(Only Major States are Shown)
100
1.5
24 dB
80
BIT (3, 6, 12)
ALL BITS
1
0.5
0
-0.5
-1
BIT 24
-1.5
45 dB
60
40
20
0
-20
-40
TE
RELATIVE PHASE (deg)
STEP ERROR (dB)
(3, 6, 12) dB
-60
-80
-100
-2
0
2
4
6
8
10
FREQUENCY (GHz)
1
2
3
4
5
6
7
8
9
10
FREQUENCY (GHz)
LE
Serial Control Interface
0
The HMC629LP4E contains a 3-wire SPI compatible digital interface (SERIN, CLK, LE). The serial control interface
is activated when P/S is kept high. The 4-bit serial word must be loaded MSB first. The positive-edge sensitive CLK
and LE requires clean transitions. If mechanical switches are used, sufficient debouncing should be provided. When
LE is high, 4-bit data in the serial input register is transferred to the attenuator. When LE is high CLK is masked to
prevent data transition during output loading.
B
SO
Attenuators - Digital - SMT
2
When P/S is low, 3-wire SPI interface inputs (SERIN, CLK, LE) are disabled and the input register is loaded with
parallel digital inputs (D0-D5). When LE is high, 4-bit parallel data changes the state of the part per truth table.
O
For all modes of operations, the state will stay constant while LE is kept low.
3
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price,2 delivery,
andDrive,
to place
orders: AnalogMA
Devices,
For price,
delivery
andDevices
to place
orders:
Hittite
Microwave
Elizabeth
Chelmsford,
01824Inc.,
responsibility
is assumed
by Analog
for its use,
nor for any
infringements
of patents orCorporation,
other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343
Fax: 978-250-3373
Order
at www.hittite.com
Phone: On-line
781-329-4700
• Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Application
Support: Phone: 1-800-ANALOG-D
Trademarks and registered trademarks are
the property of their
respective owners.
Application
Support:
Phone: 978-250-3343
or apps@hittite.com
HMC629LP4 / 629LP4E
v08.0112
3 dB LSB GaAs MMIC 4-BIT
DIGITAL ATTENUATOR, DC - 6 GHz
100 ns
Control set-up time, tCS
20 ns
Control hold-time, tCH
20 ns
LE setup-time, tLN
10 ns
Min. LE pulse width, tLEW
10 ns
Min LE pulse spacing, tLES
630 ns
Serial clock hold-time from LE, tCKN
10 ns
Hold Time, tPH.
0 ns
Latch Enable Minimum Width, tLEN
10 ns
Setup Time, tPS
2 ns
Parallel Mode (Direct Parallel Mode & Latched Parallel Mode)
LE
Note: The parallel mode is enabled when P/S is set to low.
Direct Parallel Mode - The attenuation state is changed by the Control Voltage Inputs directly. The LE (Latch Enable)
must be at a logic high to control the attenuator in this manner.
B
SO
Latched Parallel Mode - The attenuation state is selected using the Control Voltage Inputs and set while the LE is in
the Low state. The attenuator will not change state while LE is Low. Once all Control Voltage Inputs are at the desired
states the LE is pulsed. See timing diagram below for reference.
Power-Up States
O
If LE is set to logic LOW at power-up, the logic state of
PUP1 and PUP2 determines the power-up state of the
part per PUP truth table. If the LE is set to logic HIGH
at power-up, the logic state of D3-D0 determines
the power-up state of the part per truth table. The
attenuator latches in the desired power-up state
approximately 200 ms after power-up.
Power-On Sequence
The ideal power-up sequence is: GND, Vdd, digital
inputs, RF inputs. The relative order of the digital
inputs are not important as long as they are powered
after Vdd / GND
Bias Voltage
Vdd (Vdc)
Idd (Typ.) (mA)
5
2.0
Control Voltage Table
State
Vdd = +3V
Vdd = +5V
Low
0 to 0.5V @