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HMC624LP4 / 624LP4E
v02.0807
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz
Typical Applications
Features
0.5 dB LSB Steps to 31.5 dB High Input IP3: +55 dBm Low Insertion Loss: 2.2 dB @ 3.5 GHz TTL/CMOS Compatible, Serial or Parallel Control 0.25 dB Typical Step Error Single +3V or +5V Supply Compact 4x4mm SMT Package
10
ATTENUATORS - SMT
The HMC624LP4(E) is ideal for: * Cellular/3G Infrastructure * WiBro / WiMAX / 4G * Microwave Radio & VSAT * Test Equipment and Sensors * IF & RF Applications
Functional Diagram
General Description
The HMC624LP4(E) is a broadband 6-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 6 bit parallel word. The HMC624LP4(E) also features a user selectable power up state and a serial output port for cascading other Hittite serial controlled components. The HMC624LP4(E) is housed in a RoHS compliant 4x4 mm QFN leadless package, and requires no external matching components.
Electrical Specifi cations,
TA = +25 C, with Vdd = +5V & Vctl = 0/+5V (Unless Otherwise Noted)
Parameter Insertion Loss Attenuation Range Return Loss (ATTIN, ATTOUT, All Atten. States) Attenuation Accuracy: (Referenced to Insertion Loss) All Attenuation States Input Power for 0.1 dB Compression Input Third Order Intercept Point (Two-Tone Input Power= 10 dBm Each Tone) DC - 6.0 GHz DC - 0.8 GHz 0.8 - 6.0 GHz DC - 6.0 GHz DC - 6.0 GHz Frequency (GHz) DC - 3.0 GHz 3.0 - 6.0 GHz Min. Typ. 1.8 2.8 31.5 15 (0.10 + 5% of Atten. Setting) Max. (0.30 + 3% of Atten. Setting) Max. 30 55 Max. 2.4 3.8 Units dB dB dB dB dB dB dBm dBm
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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
HMC624LP4 / 624LP4E
v02.0807
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz
Normalized Attenuation [1]
Insertion Loss vs. Temperature
0
[1]
(Only Major States are Shown)
0 NORMALIZED ATTENUATION (dB) -5 -10 -15 -20 -25 -30 -35
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ATTENUATORS - SMT
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INSERTION LOSS (dB)
-1
-2
-3
+25 C +85 C -40 C
-4
-5 0 1 2 3 4 5 6 FREQUENCY (GHz)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
FREQUENCY (GHz)
Input Return Loss [1]
(Only Major States are Shown)
0 -5 RETURN LOSS (dB)
Output Return Loss [1]
(Only Major States are Shown)
0 -5 RETURN LOSS (dB) -10 -15 -20 -25 -30 -35 -40
-10 -15 -20 -25 -30 -35 -40 0 1 2 3 4 5 6 FREQUENCY (GHz)
0
1
2
3
4
5
6
FREQUENCY (GHz)
Bit Error vs. Frequency [2] Bit Error vs. Attenuation State
1 0.8 0.6 1 BIT ERROR (dB) BIT ERROR (dB) 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 0 4 8 12 16 20 24 28 32 ATTENUATION STATE (dB) -1.5 -2 0 1 2 3 4 5 6 FREQUENCY (GHz) 0.5 0 -0.5 -1
[2]
(Only Major States are Shown)
2 1.5
[1] Data taken with bias tees on input and output RF ports. [2] C1, C6 = 330pF
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
HMC624LP4 / 624LP4E
v02.0807
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz
Worst Case Step Error Between Successive Attenuation States [2]
IP3 vs. Temperature [2]
80 75 70 65 IP3 (dBm) 60 55 50 45 40 35 30
10
STEP ERROR (dB)
1 0.8 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 0 1 2 3 4 5 6 FREQUENCY (GHz)
ATTENUATORS - SMT
0
1
2
3
4
5
6
FREQUENCY (GHz)
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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
HMC624LP4 / 624LP4E
v02.0807
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz
Serial Mode
The serial mode is enabled then P/S is set to high. Data is entered LSB first and after the 6th shift clock cycle the LE (Latch Enable) is pulsed High and then Low. See timing diagram below for reference.
10
ATTENUATORS - SMT
Timing Diagram
Timing
Parameter Serial Input Setup Time Hold Time from Serial Input to Shift Clock Setup Time from Shift Clock to Latch Enable Propagation Delay Setup Time for New Data Symbol ts th tlsup tpd tsnd Vdd = +5V (Typ.) 20 20 40 10 10 Units ns ns ns ns ns
Timing Diagram (Latched Parallel Mode)
Parallel Mode (Direct Parallel Mode & Latched Parallel Mode)
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. 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.
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
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HMC624LP4 / 624LP4E
v02.0807
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz
Power-Up States
Parallel PUP Truth Table
P/S 0 0 0 0 0 LE 0 0 0 0 1 PUP2 0 1 0 1 X PUP1 0 0 1 1 X Attenuation State 31.5 dB 24 dB 16 dB 8 dB 0.5 to 31.5 dB
10
ATTENUATORS - SMT
Using the Parallel PUP truth table the attenuator can be turned on at a specific attenuation state. By using the PUP1 and PUP2 line four different attenuation states can be selected. It can also be used in the Direct Parallel Mode using the Control Voltage Inputs to select attenuation values.
Note: Power-Up with LE= 1 provides normal parallel operation with D0 - D5, and PUP1 and PUP2 are not active.
Absolute Maximum Ratings
RF Input Power (DC - 6 GHz) [1] Digital Inputs (Reset, Shift Clock, Latch Enable & Serial Input) Bias Voltage (Vdd) Channel Temperature Continuous Pdiss (T = 85 C) (derate 9.8 mW/C above 85 C) [1] Thermal Resistance Storage Temperature Operating Temperature [1] At max gain settling 27 dBm (T = +85 C) -1.5V to (Vdd +1.5V) Vdc 5.6 Vdc 150 C 0.635 W 102 C/W -65 to +150 C -40 to +85 C
Truth Table
Control Voltage Input Attenuation State D5 High High High High High High Low Low D4 High High High High High Low High Low D3 High High High High Low High High Low D2 High High High Low High High High Low D1 High High Low High High High High Low D0 High Low High High High High High Low Reference I.L. 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB
Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected.
Bias Voltage
Vdd (Vdc) 3 5 Idd (Typ.) (mA) 1.8 2.0
TTL/CMOS Control Voltage
State Low High Vdd= +3V or +5V 0 to 0.8V 2.0V to Vdd
ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS
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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
HMC624LP4 / 624LP4E
v02.0807
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz
Outline Drawing
10
ATTENUATORS - SMT
H624 XXXX H624 XXXX
NOTES: 1. LEADFRAME MATERIAL: COPPER ALLOY 2. DIMENSIONS ARE IN INCHES [MILLIMETERS] 3. LEAD SPACING TOLERANCE IS NON-CUMULATIVE. 4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM. PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM. 5. PACKAGE WARP SHALL NOT EXCEED 0.05mm. 6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND. 7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED LAND PATTERN.
Package Information
Part Number HMC624LP4 HMC624LP4E Package Body Material Low Stress Injection Molded Plastic RoHS-compliant Low Stress Injection Molded Plastic Lead Finish Sn/Pb Solder 100% matte Sn MSL Rating MSL1 MSL1
[1]
Package Marking [3]
[2]
[1] Max peak reflow temperature of 235 C [2] Max peak reflow temperature of 260 C [3] 4-Digit lot number XXXX
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
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HMC624LP4 / 624LP4E
v02.0807
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz
Pin Descriptions
10
ATTENUATORS - SMT
Pin Number 1 2
Function P/S CLK
Description
Interface Schematic
3
SERIN See truth table, control voltage table and timing diagram.
4
LE
5, 14
GND
These pins and package bottom must be connected to RF/DC ground.
6, 13
ATTIN, ATTOUT
These pins are DC coupled and matched to 50 Ohms. Blocking capacitors are required. Select value based on lowest frequency of operation.
7 - 12
ACG1 - ACG6
External capacitors to ground is required. Select value for lowest frequency of operation. Place capacitor as close to pins as possible.
15
SEROUT
Serial input data delayed by 6 clock cycles.
16, 17
PUP2, PUP1 See truth table, control voltage table and timing diagram.
19 - 24
D5, D4, D3, D2, D1, D0
18
Vdd
Supply voltage
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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
HMC624LP4 / 624LP4E
v02.0807
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6 GHz
Application Circuit
10
ATTENUATORS - SMT
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
10 - 209
HMC624LP4 / 624LP4E
v02.0807
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6.0 GHz
Evaluation PCB
10
ATTENUATORS - SMT
List of Materials for Evaluation PCB 117212 [1]
Item J1 - J2 J3 C1, C6 C7, C8 U1 PCB [2] Description PCB Mount SMA Connector 14 Pin DC Connector 330 pF Capacitor, 0402 Pkg. 1000 pF Capacitor, 0402 Pkg. HMC472LP4(E) Digital Attenuator 117210 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350
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. The evaluation circuit board shown is available from Hittite upon request.
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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
HMC624LP4 / 624LP4E
v02.0807
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR, DC - 6.0 GHz
Notes:
10
ATTENUATORS - SMT
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
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