QPB8857
®
75Ω 28dB CATV Doubler Amplifier 47 –
1218MHz
Product Overview
The QPB8857 is a GaAs pHEMT/MESFET 75-ohm
Doubler RF amplifier IC featuring over 28dB of flat
gain and low noise. This IC is designed to support
DOCSIS 3.1 applications up to 1218MHz using a
single 24V supply. The QPB8857 offers low noise and
low distortion at high efficiency consuming only 10.5W
in a 5x7 QFN package. Its compact size and low ϴjc
enable integration that is ideally suited for hybrid
module or an alternative to hybrid module
applications.
40P 5x7 QFN Package
Functional Block Diagram
Key Features
■
High Gain: 28dB @ 1218MHz
Adjustable Bias
47 - 1218 MHz BW
57dBmV/ch virtual 1.2GHz, at 19dB tilt
Low Noise: 4.5dB
Excellent Composite Distortion
pHEMT / MESFET device technologies
Compact Size: 40P 5x7 QFN
Power Consumption (24V, 440mA – 10.5W)
■
+24V
RF
RC Filter
V
LIN
I
DD CTRL
½ I
DD
RF OUT
75
Ω
■
■
■
■
■
■
+24V
½ I
DD
RF IN
75
Ω
QPB8857
½ I
DD
EP
½ I
DD
RC Filter
RF
■
Applications
•
DOCSIS 3.1
•
Broadband CATV hybrid modules
•
Head End CMTS Equipment
•
75-ohm amplifiers
Ordering Information
Part No.
QPB8857SQ
QPB8857SR
QPB8857TR13
QPB8857EVB
Description
Sample bag with 25 pieces
7" Reel with 100 pieces
13" Reel with 2500 pieces
47 – 1218MHz PCBA
Data Sheet –Rev 3, July 24, 2018 | Subject to change without notice
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QPB8857
®
75Ω 28dB CATV Doubler Amplifier 47 –
1218MHz
Absolute Maximum Ratings
Parameter
Supply Voltage (V
DD
)
Supply Current (I
DD
)
Maximum Input Level (single tone)
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
Rating
+30V (5min)
570mA
+70dBmV
-40 to +90°C
−65 to +150°C
+150°C
Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent
damage to the device. Extended application of Absolute Maximum Rating conditions to the device may
reduce device reliability.
Electrical Specifications – 24V
Parameter
Supply Voltage (V
DD
)
Supply Current (I
DD
)
Frequency Range
Gain
Gain Flatness
Gain Slope
Reverse Isolation
Input Return Loss
Output Return Loss
Noise Figure
CSO
CTB
CCN
OIP2
OIP3
Output P1dB
Thermal Resistance
Notes:
1.
Low band: 225MHz, 275.5MHz, 16dBm/tone
High band: 1100MHz, 1150.5MHz, 16dBm/tone
Low band: 225MHz, 275.5MHz, 16dBm/tone
High band: 1100MHz, 1150.5MHz, 16dBm/tone
1218 MHz
Θ
JB (Junction to backside of QFN)
80 NTSC + 111 QAM (-6dB offset), 57dBmV/ch virtual
output at 1218MHz @19dB tilt
1218MHz
Max. deviation from line using least squares fit from 47
to 1218 MHz
Gain(1218MHz) - Gain(50MHz)
V
DD
total current
50
28
±0.5
1.0
-42
18
18
4.5
-81
-83
60
92
88
53
48
31
6
Condition
(1)
Min
Typ
24
440
Max
Unit
V
mA
1218
MHz
dB
dB
dB
dB
dB
dB
dB
dBc
dBc
dB
dBm
dBm
dBm
dBm
dBm
˚C/W
Typical performance at these conditions: Temp = +25°C, V
DD
= +24V, 75Ω system, Full band unless otherwise noted
Data Sheet –Rev 3, July 24, 2018 | Subject to change without notice
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QPB8857
®
75Ω 28dB CATV Doubler Amplifier 47 –
1218MHz
Evaluation Board Bill of Materials
Reference
Designator
U1
C1,C2,C3,C4,C12,
C13,C16,C17,C18,
C19,C29,C30
C20,C25,C26
C7,C8
C6,C11
C27
R3,R4
R18
R19,R24
R11,R12
R33,R34
R21
R23
R26
R31
R20
R32,R39
R36,R37
R1,R2
R7,R8
L1,L2
L10,L13
L3,L4,L9,L14
L6
L5
L16,L17
T1
T2
R15,R16,R17,R22,
R25,R27,R28,R29,R30,
R35,R38,R40
C9,C10,C21,C22,C23,
C24,C28,C31,C32,L7,
L8,U2,U3,U4,U5
Description
1.2GHz, 28dB Power Doubler
Manufacturer
Qorvo
PART #
QPB8857
CAP, 0.01uF, ±10%, 50V, X7R, 0402
CAP0402, 0.5pF, ±0.1pF, 50V, C0G, HIQ
CAP0402, 10pF, ±2%, 50V, C0G, HIQ
CAP, 470pF, 5%, 50V, C0G, 0402
CAP, 0.7pF, +/-0.05pF, 50V, C0G, 0402
RES, 15 OHM, 1%, 1/16W, 0402
RES, 10 OHM, 1%, 1/16W, 0402
RES, 0 OHM, 5%, 1/10W, 0402
RES, 7.5 OHM, 5%, 1/16W, 0402
RES, 200 OHM, 1%, 1/16W, 0402
RES, 10K, 1%, 1/16W, 0402
RES, 750 OHM, 1%, 1/16W, 0402
RES, 33K, 1%, 1/16W, 0402
RES, 3.6K, 1%, 1/10W, 0402
RES, 6.2K, 1%, 1/10W, 0402
RES, 0 OHM, 0603
RES, 1.2K, 5%, 1/16W, 0402
RES, 22 OHM, 5%, 1/16W, 0402
120 OHM,1%,1/16W,0402 LEAD FREE
IND, 470nH, ±5%, 310mA, 650mHZ, 0402
IND, 47nH, 5%, M/L, 0402
IND, 3.3nH, +/-0.1nH, T/F, 0402
IND, 3.6nH, +/-0.1nH, T/F, 0402
IND, 6.2nH, +/-0.1nH, T/F, 0402
IND, 2.2uH, 20%, 0.36A, 0.7mm, W/W,
0603
XFMR, SMT, 75 OHM, CD542, 1:1
BALUN, TC1
Transformer, 2:1, 5 to 1200 MHz, TT1618
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Data Sheet –Rev 3, July 24, 2018 | Subject to change without notice
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