HMC708LP5 / 708LP5E
v03.0409
0.5 dB LSB 6-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz
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: 25mm
2
Typical Applications
the HmC708lp5(e) is ideal for:
• Cellular infrastructure
• Wibro, WimaX and lte/ 4g
• microwave radio & Vsat
• test equipment and sensors
Functional Diagram
12
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.
Rbias = 270 Ohms for Vdd = +5V, Rbias = 10 kOhms for Vdd = +3V, Vdd = Vdd1 = Vdd2 = Vdd3
parameter
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
min.
typ.
Vdd = +3V
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
max.
min.
typ.
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
max.
Units
gHz
db
db
db
db
db
dbm
dbm
db
ns
ns
ma
ma
Electrical Specifications,
T
A
= +25° C
[1] two-tone output power @ -10 dbm [2] two-tone output power @ -5 dbm
12 - 1
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@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
36
GAIN (dB)
32
28
Vdd=3V
Vdd=3V
Vdd=5V
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
12
Variable gain amplifiers - digital - smt
12 - 2
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
1.8
1.9
2
FREQUENCY (GHz)
2.1
2.2
0
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: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@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
-2
-3
Bit Error vs. Frequency @ +5V
(Only Major States are Shown)
3
2
1
0
-1
-2
-3
1.5
Vdd = 3V
Vdd = 5V
1.5
1.7
1.9
2.1
2.3
2.5
1.7
1.9
2.1
2.3
2.5
12
Variable gain amplifiers - digital - smt
2.5
2
BIT ERROR (dB)
1.5
1
0.5
0
-0.5
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
0
4
8
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
12 - 3
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@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)
1.5
1.7
1.9
2.1
FREQUENCY (GHz)
2.3
2.5
1
1
0
-1
-1
-2
-2
1.5
1.7
1.9
2.1
FREQUENCY (GHz)
2.3
2.5
12
Variable gain amplifiers - digital - smt
12 - 4
Noise Figure vs. Frequency
2
1.6
NOISE FIGURE (dB)
1.2
0.8
0.4
0
Vdd=3V
Vdd=5V
Noise Figure vs. Attenuation @ 1900 MHz
20
16
NOISE FIGURE (dB)
12
8
4
0
Vdd=3V
Vdd=5V
1.5
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: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@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
1.6
NOISE FIGURE (dB)
1.2
0.8
0.4
0
Vdd=3V
Vdd=5V
20
RESPONSE (dB)
10
0
-10
-20
Vdd=3V
Vdd=5V
S11
S22
12
Variable gain amplifiers - digital - smt
-30
1.5
1.6
1.7
1.8
1.9
2
2.1 2.2
FREQUENCY (GHz)
2.3
2.4
2.5
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
10
0
-10
-20
Vdd=3V
Vdd=5V
IP3 (dBm)
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
12 - 5
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
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