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HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Typical Applications
The HMC708LP5(E) is ideal for: * Cellular Infrastructure * WiBro, WiMAX and LTE/ 4G * Microwave Radio & VSAT * Test Equipment and Sensors
Features
-2.5 to +29 dB Gain Control in 0.5 dB Steps Power-up State Selection High Output IP3: +37 dBm Low Noise Figure: 1 dB TTL/CMOS Compatible Serial, Parallel, or Latched Parallel Control 0.25 dB Typical Step Error Single +3V and +5V Supply 32 Lead 5x5mm SMT Package: 25mm2
Functional Diagram
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
General Description
The HMC708LP5(E) is a digitally controlled variable gain amplifier which operates from 1700 MHz and 2200 GHz, and can be programmed to provide between 2.5 dB attenuation and +29 dB of gain, in 0.5 dB steps. The HMC708LP5(E) delivers noise figure of 1 dB in its maximum gain state, with output IP3 of up to +37 dBm. The dual mode gain control interface accepts either three wire serial input or 6 bit parallel word. The HMC708LP5(E) also features a user selectable power up state and a serial output for cascading other Hittite serially controlled components. For 900 MHz applications please refer to the HMC707LP5(E) data sheet.
Electrical Specifi cations, TA = +25 C
Rbias = 270 Ohms for Vdd = +5V, Rbias = 10k Ohms for Vdd = +3V, Vdd = Vdd1 = Vdd2 = Vdd3
Min. Parameter Vdd = +3V Frequency Range Gain (Maximum Gain State) Gain Control Range Input Return Loss Output Return Loss Attenuation Accuracy: (Referenced to Maximum Gain State) Output Power for 1 dB Compression Output Third Order Intercept Point (Two-Tone Input Power= -10 dBm Each Tone) Noise Figure Switching Characteristics tRISE, tFALL (50% CTL to 90% RF) Current Amplifier 1 Current Amplifier 2 tRISE tFALL 30 130 23 1.7 - 2.2 27 31.5 16.5 10.5 (0.3 + 8%) of Attenuation Setting 13 16 32.5 1.1 47 155 65 190 80 130 25 Vdd = +5V 1.7 - 2.2 30 31.5 20.5 13.5 (0.2 + 5%) of Attenuation Setting 18 21.5 37.5 1 140 270 97 155 135 190 GHz dB dB dB dB dB dBm dBm dB ns ns mA mA Typ. Max. Min. Typ. Max. Units
[1] Two-tone output power @ -10 dBm [2] Two-tone output power @ -5 dBm
13 - 96
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Maximum Gain vs. Frequency [1]
40
Vdd=5V +25C +85C -40C
Normalized Attenuation
(Only Major States are Shown)
0 NORMALIZED ATTENUATION (dB) -5 -10 -15 -20 -25 -30 -35 1.5
Vdd=3V Vdd=5V
36
GAIN (dB)
32
28
Vdd=3V
24
20 1.5
1.7
1.9 2.1 FREQUENCY (GHz)
2.3
2.5
1.6
1.7
1.8
1.9 2 2.1 2.2 FREQUENCY (GHz)
2.3
2.4
2.5
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
13 - 97
Input Return Loss
(Only Major States are Shown)
0
Output Return Loss
(Only Major States are Shown)
0
RETURN LOSS (dB)
-20
RETURN LOSS (dB)
-10
Vdd=3V Vdd=5V
-5
Vdd=3V Vdd=5V
-10
-30
-15
-40 1.5
1.7
1.9 2.1 FREQUENCY (GHz)
2.3
2.5
-20 1.5
1.7
1.9 2.1 FREQUENCY (GHz)
2.3
2.5
Output IP3 vs. Tone Power [1]
48 44 40 IP3 (dBm) 36 32
Pout=-15dBm Pout=-10dBm Pout= -5dBm Pout= 0dBm
Output IP3 vs. Attenuation @ 1900 MHz
40
Power Out = -10dBm
Vdd=5V
30 IP3 (dBm)
20
10 28
Vdd=3V
Vdd=3V Vdd=5V
24 1.7
0 1.8 1.9 2 FREQUENCY (GHz) 2.1 2.2 0 4 8 12 16 20 24 ATTENUATION STATE (dB) 28 32
[1] Maximum gain state with digital attenuator set to minimum attenuation
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Bit Error vs. Frequency @ +3V
(Only Major States are Shown)
3 2 BIT ERROR (dB) BIT ERROR (dB) 1 0 -1
Vdd = 3V
Bit Error vs. Frequency @ +5V
(Only Major States are Shown)
3 2 1 0 -1
Vdd = 5V
-2 -3 1.5
-2 -3 1.5
1.7
1.9
2.1
2.3
2.5
1.7
1.9
2.1
2.3
2.5
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
2.5 2 BIT ERROR (dB) 1.5 1 0.5 0 -0.5 0 4 8
FREQUENCY (GHz)
FREQUENCY (GHz)
Bit Error vs. Attenuation State @ +3V
Vdd=3V (1.7, 1.8, 1.9, 2.0, 2.1, 2.2) GHz
Bit Error vs. Attenuation State @ +5V
2.5 2 BIT ERROR (dB)
Vdd=5V (1.7, 1.8, 1.9, 2.0, 2.1, 2.2) GHz
1.5 1 0.5 0 -0.5
12 16 20 24 ATTENUATION STATE (dB)
28
32
0
4
8
12 16 20 24 ATTENUATION STATE (dB)
28
32
Normal Relative Phase vs. Frequency
(Only Major States are Shown)
30 20 10 0 -10 -20 -30 1.5
Vdd=3V Vdd=5V
RELATIVE PHASE (deg)
1.7
1.9 2.1 FREQUENCY (GHz)
2.3
2.5
13 - 98
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Step Error vs. Frequency @ +3V
(Only Major States are Shown)
2
Vdd = 3V
Step Error vs. Frequency @ +5V
(Only Major States are Shown)
2
Vdd = 5V
STEP ERROR (dB)
0
STEP ERROR (dB) 1.7 1.9 2.1 FREQUENCY (GHz) 2.3 2.5
1
1
0
-1
-1
-2 1.5
-2 1.5
1.7
1.9 2.1 FREQUENCY (GHz)
2.3
2.5
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
13 - 99
Noise Figure vs. Frequency
2
Noise Figure vs. Attenuation @ 1900 MHz
20
1.6 NOISE FIGURE (dB)
1.2
NOISE FIGURE (dB)
Vdd=3V Vdd=5V
16
Vdd=3V Vdd=5V
12
0.8
8
0.4
4
0 1.5
0 1.7 1.9 2.1 FREQUENCY (GHz) 2.3 2.5 0 4 8 12 16 20 24 ATTENUATION (dBm) 28 32
Output IP3 & Supply Current vs. Supply Voltage @ 1900 MHz
44
Idd
Output IP3 & Supply Current vs. Rbias @ 1900 MHz
300 45 500
40 IP3 (dBm)
250 IP3 (dBm)
35
400 DC CURRENT (mA)
Idd (mA)
36
200
25
Vdd=3V Vdd=5V
300
32
IP3 @1.9GHz
150
15
200
28 2.7
100 3.1 3.5 3.9 4.3 4.7 5.1 5.5 VOLTAGE SUPPLY (V)
5 1 10 100 Rbias (Ohms) 1000
100 10000
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Option 1 [1] : Amp1 + 6-Bit DAT only Gain & Return Loss [1] [2]
30
S21
Noise Figure vs. Frequency [1] [2]
2
20 10 0 -10
S22 Vdd=3V Vdd=5V
1.6 NOISE FIGURE (dB)
Vdd=3V Vdd=5V
RESPONSE (dB)
1.2
S11
0.8
-20 -30 1.5
0.4
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
1.6
1.7
1.8
1.9 2 2.1 2.2 FREQUENCY (GHz)
2.3
2.4
2.5
0 1.5
1.7
1.9 2.1 FREQUENCY (GHz)
2.3
2.5
Output IP3 vs. Attenuation @ 1900 MHz [1]
30
Power Out = -20dBm
20
IP3 (dBm)
10
0
Vdd=3V Vdd=5V
-10
-20 0 4 8 12 16 20 24 ATTENUATION STATE (dB) 28 32
[1] See Application Circuit [2] Maximum gain state with digital attenuator set to minimum attenuation
13 - 100
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Option 2 [1] : 6-Bit DAT + Amp2 only Gain & Return Loss [1] [2]
20 15
S21
Output IP3 vs. Attenuation @ 1900 MHz [1]
44
Pout=0dBm
40 36
Setup limit
10 RESPONSE (dB)
Vdd=3V Vdd=5V S11
IP3 (dBm)
5 0 -5 -10
32 28 24
Pout=-5dBm Vdd=3V Vdd=5V
-15
S22
-20 1.5
20 1.6 1.7 1.8 1.9 2 2.1 2.2 FREQUENCY (GHz) 2.3 2.4 2.5 0 4 8 12 16 20 24 ATTENUATION STATE (dB) 28 32
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
13 - 101
Serial Control Interface
The HMC708LP5(E) contains a 3-wire SPI compatible digital interface (SERIN, CLK, LE). It is activated when P/S is kept high. The 6-bit serial word must be loaded MSB first. The positive-edge sensitive CLK and LE requires clean transitions. Standard logic families work well. If mechanical switches were used, sufficient debouncing should be provided. When LE is high, 6-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. When P/S is low, 3-wire SPI interface inputs (SERIN, CLK, LE) are disabled and serial input register is loaded asynchronously with parallel digital inputs (D0-D5). When LE is high, 6-bit parallel data is transferred to the attenuator. For all modes of operations, attenuation state will stay constant while LE is kept low.
[1] See Application Circuit [2] Maximum gain state with digital attenuator set to minimum attenuation
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Timing Diagram (Latched Parallel Mode)
Parameter Min. serial period, tSCK Control set-up time, tCS Control hold-time, tCH LE setup-time, tLN Min. LE pulse width, tLEW Min LE pulse spacing, tLES Serial clock hold-time from LE, tCKN Hold Time, tPH. Latch Enable Minimum Width, tLEN Setup Time, tPS Typ. 100 ns 20 ns 20 ns 10 ns 10 ns 630 ns 10 ns 0 ns 10 ns 2 ns
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
Parallel Mode (Direct Parallel Mode & Latched Parallel Mode)
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. 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 above for reference.
Power-Up States
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 D0-D5 determines the power-up state of the part per truth table. The DVGA latches in the desired power-up state approximately 200 ms after power-up.
PUP Truth Table
LE 0 0 0 0 1 PUP1 0 1 0 1 X PUP2 0 0 1 1 X Gain Relative to Maximum Gain -31.5 -24 -16 Insertion Loss 0 to -31.5 dB
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
Note: The logic state of D0 - D5 determines the powerup state per truth table shown below when LE is high at power-up.
Truth Table
Control Voltage Input D5 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 Gain Relative to Maximum Gain 0 dB -0.5 dB -1 dB -2 dB -4 dB -8 dB -16 dB -31.5 dB
Control Voltage Table
State Low High Vdd = +3V 0 to 0.5V @ <1 A 2 to 3V @ <1 A Vdd = +5V 0 to 0.8V @ <1 A 2 to 5V @ <1 A
High High High High High High Low Low
Any combination of the above states will provide a reduction in gain approximately equal to the sum of the bits selected.
13 - 102
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Typical Supply Current vs. Vdd (Rbias =
270 for Vdd= 5V, Rbias= 10k for Vdd= 3V)
Vdd (V) 2.7 3.0 3.3 4.5 5.0 5.5 Total Idd (mA) 191 206 220 230 252 271
Absolute Maximum Ratings
Drain Bias Voltage (Vdd) RF Input Power (RFIN) (Vdd = +5 Vdc) Channel Temperature Digital Inputs (Reset, Shift Clock, Latch Enable, Serial Input) Continuous Pdiss (T= 85 C) (derate 28 mW/C above 85 C) Thermal Resistance (channel to ground paddle) Storage Temperature 5.5 V -5 dBm + Attenuation State (do not exceed +10 dBm) 150 C -0.5 to Vdd +0.5V 1.8 W 36.2 C/W -65 to +150 C -40 to +85 C
Note: Amplifi er will operate over full voltage ranges shown above.
ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS
Operating Temperature
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
13 - 103
Absolute Bias Resistor Range & Recommended Bias Resistor Values for Idd
Rbias Vdd Min. Max. Recommended 2.2k 3V 1K [1] Open Circuit 4.7k 10k 0 5V 0 Open Circuit 120 270 [1] Operation with Vdd= 3V and Rbias < 1K Ohm may result in the part becoming conditionally stable which is not recommended. 195 201 206 231 243 252 Total Idd (mA)
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Outline Drawing
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
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 HMC708LP5 HMC708LP5E 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] H708 XXXX H708 XXXX
[2]
[1] Max peak reflow temperature of 235 C [2] Max peak reflow temperature of 260 C [3] 4-Digit lot number XXXX
Pin Descriptions
Pin Number Function Description RF input to the first amplifier (AMP1) This pin is DC coupled and matched to 50 Ohms. No connection necessary. These pins may be connected to RF/DC ground without affecting performance. Interface Schematic
1
RFIN
2, 3, 21, 30
N/C
4
RES
This pin is used to set the DC current of the first amplifier by selection of external bias resistor. See application circuit.
13 - 104
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Pin Descriptions (Continued)
Pin Number Function Description Interface Schematic
5
SEROUT
Serial input data delayed by 6 clock cycles.
6, 7 9 - 14
PUP1, PUP2 D0 - D5
See truth table, control voltage table and timing diagram.
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
13 - 105
8 15 16 17
Vdd1 P/S CLK SERIN
Supply voltage
See truth table, control voltage table and timing diagram. 18 LE
19, 23, 25, 26, 28
GND
These pins and package bottom must be connected to RF/DC ground.
20
RFOUT
RF Output and DC BIAS for the second amplifier (AMP2). See Application Circuit for off-chip components.
22
RFIN3
RF input for the second amplifier (AMP2). This pin is DC coupled. An off-chip DC blocking capacitor is required. Input and output of the 6-bit digital attenuator (6-Bit DAT). These pins are DC coupled and matched to 50 Ohms. Blocking capacitors are required. Select value based on lowest frequency of operation. RF output for the first amplifier (AMP1) This pin is matched to 50 Ohms.
27 24
RFIN2 RFOUT2
29
RFOUT1
31, 32
Vdd2, Vdd3
Power Supply Voltage for the first amplifier. External bypass capacitors are required. See application circuit.
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Evaluation PCB
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
List of Materials for Evaluation PCB 120493 [1]
Item J1 - J4 J5 C1, C8, C10, C12, C18 C3 C6, C13, C15 C7, C14 C16 C17 L2 L3 L4 L5 R1 (Rbias) R2 - R10 Description PCB Mount SMA Connector 2mm Vertical Molex 28pos Connector 220 pF Capacitor, 0402 Pkg. 10 nF Capacitor, 0402 Pkg. 1000 pF Capacitor, 0603 Pkg. 10 nF Capacitor, 0603 Pkg. 27 pF Capacitor, 0603 Pkg. 4.7 uF Capacitor, 0805 Pkg. 15 nH Inductor, 0402 Pkg. 6.8 nH Inductor, 0603 Pkg. 47 nH Inductor, 0603 Pkg. 5.1 nH Inductor, 0402 270 Ohm Resistor, 0402 Pkg. 39K Ohm Resistor, 0402 Pkg. Item R12, R13 U1 PCB [2] Description 0 Ohm Resistor, 0402 Pkg. HMC708LP5(E) Variable Gain Amplifier 120491 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Arlon 25FR or Roger 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.
13 - 106
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
HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
Application Circuit
13
VARIABLE GAIN AMPLIFIERS - DIGITAL - SMT
13 - 107
Note 1: For option 1 (Amp1 + 6-bit DAT only) remove L4. Move 220pF capacitor (0402 Pkg.) from location C10 to C11. Note 2: For option 2 (6-Bit DAT + Amp2 only) remove R13, L2, L3 and L5. Move 220pF capacitor (0402 Pkg.) from location C8 to C9.
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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