HMC681LP5
/
681LP5E
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN
AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
Typical Applications
the HmC681lp5(e) is ideal for:
• if & rf applications
• Cellular/3g infrastructure
• Wibro / WimaX / 4g
• microwave radio & Vsat
• test equipment and sensors
v03.1010
Features
+13.5 db to +45 db gain Control in 0.5 db steps
High Output ip3: +36 dbm
±0.25 db typical gain step error
single +5V supply
32 lead 5x5mm smt package: 25mm
2
Functional Diagram
General Description
the HmC681lp5(e) is a digitally controlled variable
gain amplifier which operates from dC to 1 gHz,
and can be programmed to provide anywhere from
13.5 db, to 45 db of gain, in 0.5 db steps. the
HmC681lp5(e) delivers noise figure of 2.8 db in its
maximum gain state, with output ip3 of up to +36
dbm in any state. this serially controlled digital Vga
incorporates off chip aC ground capacitors for near
dC operation, making it suitable for a wide variety of
rf and if applications. the HmC681lp5(e) is housed
in a roHs compliant 5x5 mm Qfn leadless package,
and provides the user with a highly integrated solution.
this functionality is also available with parallel control
as the HmC626lp5(e).
12
Variable gain amplifiers - digital - smt
Electrical Specifications,
T
A
= +25° C, Vdd = Vs= P/S= +5V
parameter
gain (maximum gain state)
gain Control range
input return loss
Output return loss
gain setting accuracy:
(referenced to maximum gain state)
all gain states
Output power for 1 db Compression
Output third Order intercept point
(two-tone Output power= 5 dbm each tone)
noise figure
switching Characteristics
trise, tfall (10/90% rf)
tOn, tOff (50% Ctl to 10/90% rf)
total supply Current
min.
typ.
50 - 350
40
45
31.5
25
20
30
max.
min.
typ.
350 - 1000
40
31.5
30
17
max.
Units
mHz
db
db
db
db
db
dbm
dbm
db
ns
ns
225
ma
± (0.15 + 3% of relative gain setting) max. ± (0.15 + 3% of relative gain setting) max.
20
38
2.7
60
120
176
225
19
36
2.8
60
120
176
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
HMC681LP5 / 681LP5E
v03.1010
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE
GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
50 to 350 MHz Tuning
Relative Gain Setting
Gain vs. Frequency
50
45
40
RELATIVE GAIN (dB)
35
GAIN (dB)
30
25
20
15
10
5
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
+25C
+85C
-40C
(Referenced to Maximum Gain State)
(Only Major States are Shown)
0
-5
-10
16 dB
8 dB
-15
-20
-25
-30
-35
0.05
31.5 dB
0.1
0.15
0.2
0.25
0.3
0.35
FREQUENCY (GHz)
FREQUENCY (GHz)
12
Variable gain amplifiers - digital - smt
12 - 2
Input Return Loss
0
-5
RETURN LOSS (dB)
(Only Major States are Shown)
Output Return Loss
0
-5
31.5dB
(Only Major States are Shown)
31.5dB
-15
-20
-25
-30
-35
-40
0.05
2dB
RETURN LOSS (dB)
-10
-10
-15
-20
-25
-30
-35
-40
0.05
I.L
0.1
0.15
0.2
0.25
0.3
0.35
0.1
0.15
0.2
0.25
0.3
0.35
FREQUENCY (GHz)
FREQUENCY (GHz)
Bit Error vs. Frequency
2
1.5
1
BIT ERROR (dB)
0.5
0
-0.5
-1
-1.5
16dB
(Only Major States are Shown)
Bit Error vs. Relative Gain Setting
2
1.5
1
BIT ERROR (dB)
0.5dB
0.5
0
-0.5
-1
-1.5
350MHz
31.5dB
150, 200MHz
-2
0.05
-2
0.1
0.15
0.2
0.25
0.3
0.35
0
4
8
12
16
20
24
28
32
FREQUENCY (GHz)
RELATIVE GAIN SETITING (dB)
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
HMC681LP5 / 681LP5E
v03.1010
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE
GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
50 to 350 MHz Tuning
Relative Phase vs. Frequency
(Only Major States are Shown)
60
Step Error vs. Frequency
(Only Major States are Shown)
1
0.8
RELATIVE PHASE (deg)
40
STEP ERROR (dB)
8 dB
31.5 dB
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
0.15
0.2
0.25
0.3
0.35
-1
0.05
0.1
0.15
0.2
16 dB
20
0
16 dB
31.5 dB
0.5 - 16 dB
-20
1 dB
12
Variable gain amplifiers - digital - smt
-40
0.05
0.1
0.25
0.3
0.35
FREQUENCY (GHz)
FREQUENCY (GHz)
Output P1dB
24
(Major States shown are IL through 16 dB))
Output IP3 @ 5 dBm Output Power per
Tone
(Major States shown are IL through 16 dB)
45
I.L.
22
P1dB (dBm)
IP3 (dBm)
43
I.L.
41
20
16 dB
39
18
37
16 dB
16
0.05
0.1
0.15
0.2
0.25
0.3
0.35
35
0.05
0.1
0.15
0.2
0.25
0.3
0.35
FREQUENCY (GHz)
FREQUENCY (GHz)
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
HMC681LP5 / 681LP5E
v03.1010
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE
GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
350 to 1000 MHz Tuning
Relative Gain Setting
Gain vs. Frequency
50
45
40
RELATIVE GAIN (dB)
35
GAIN (dB)
30
25
20
15
10
5
0
0.2
0.4
0.6
FREQUENCY (GHz)
0.8
1
+25 C
+85 C
-40 C
(Referenced to Maximum Gain State)
(Only Major States are Shown)
0
-5
-10
16 dB
8 dB
-15
-20
-25
31.5 dB
-30
-35
0.2
0.4
0.6
FREQUENCY (GHz)
0.8
1
12
Variable gain amplifiers - digital - smt
12 - 4
Input Return Loss
0
(Only Major States are Shown)
Output Return Loss
0
-5
(Only Major States are Shown)
-10
RETURN LOSS (dB)
31.5 dB
31.5 dB
RETURN LOSS (dB)
-10
-15
-20
-25
-30
-35
-40
0.2
I.L
-20
-30
-40
I.L
-50
0.2
0.4
0.6
FREQUENCY (GHz)
0.8
1
0.4
0.6
FREQUENCY (GHz)
0.8
1
Bit Error vs. Frequency
2
1.5
1
BIT ERROR (dB)
0.5
0
-0.5
-1
-1.5
-2
0.2
0.4
0.6
16 dB
31.5 dB
(Only Major States are Shown)
Bit Error vs. Relative Gain Setting
2
1.5
1
BIT ERROR (dB)
0.5
0
-0.5
-1
-1.5
350 MHz
1000 MHz
8 dB
-2
0.8
1
0
4
8
12
16
20
24
28
32
FREQUENCY (GHz)
RELATIVE GAIN SETTING (dB)
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
HMC681LP5 / 681LP5E
v03.1010
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE
GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz
350 to 1000 MHz Tuning
Relative Phase vs. Frequency
(Only Major States are Shown)
60
31.5 dB
Step Error vs. Frequency
(Only Major States are Shown)
1
0.8
0.6
STEP ERROR (dB)
16 dB
32 dB
RELATIVE PHASE (deg)
40
16 dB
8 dB
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
20
0
0.5 - 4 dB
-20
4, 8 dB
12
Variable gain amplifiers - digital - smt
-40
0.2
0.4
0.6
FREQUENCY (GHz)
0.8
1
-1
0.2
0.4
0.6
FREQUENCY (GHz)
0.8
1
Output P1dB
24
(Major States shown are IL through 16 dB)
Output IP3 @ 5 dBm Output Power per
Tone
(Major States shown are IL through 16 dB)
50
I.L.
22
P1dB (dBm)
I.L.
40
IP3 (dBm)
20
30
16 dB
18
16 dB
20
16
0.2
0.4
0.6
FREQUENCY (GHz)
0.8
1
10
0.2
0.4
0.6
FREQUENCY (GHz)
0.8
1
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. the attenuator latches
in the desired power-up state approximately 200 ms
after power-up.
PUP Truth Table
le
0
0
0
0
pUp1
0
1
0
1
pUp2
0
0
1
1
relative gain setting
-31.5
-24
-16
insertion loss
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
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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