TQM879028
0.7−4.0 GHz ½ W Digital Variable Gain Amplifier
Applications
3G / 4G Wireless Infrastructure
Repeaters
LTE / WCDMA / CDMA
24 Pin 4x4 mm Leadless SMT Package
Product Features
0.7−4.0 GHz Frequency Range
32 dB Maximum Gain at 2.14 GHz
31.5 dB Gain Range in 0.5 dB Steps
+44 dBm Output IP3
+27.5 dBm Output P1dB
3-wire SPI Control Programming
Functional Block Diagram
DSA Out
NC
NC
NC
24
23
22
21
20
19
18
17
DSA
16
15
6-BIT
SPI
14
13
NC
NC
DSA In
NC
Amp1 Out / Vcc
NC
1
2
3
4
5
6
NC
Pin 1 Marking
Amp2 In
NC
NC
Amp2 Out / Vcc
LE
DATA
CLK
10
11
NC
Amp1 In
SOD
Vdd
NC
NC
12
7
8
9
Backside Paddle
RF/DC GND
General Description
The TQM879028 is a digital variable gain amplifier
(DVGA) featuring high linearity over the entire gain
control range. This amplifier module integrates a gain
block, a digital-step attenuator (DSA), and a high
linearity ½ Watt amplifier into a compact 4x4 mm
module. The internal 6-bit DSA provides a 31.5 dB gain
control range in 0.5 dB steps, and is controlled with a
TM
serial periphery interface (SPI ). The individual stages
are accessible to external ports to allow for optimization
of the last stage amplifier for individual bands and also
allowing other functional blocks to be added in-between
the stages.
The TQM879028 features variable gain from 0.5 dB to
32 dB at 2.14 GHz, +44 dBm output IP3, and +27.5 dBm
P1dB while only consuming 230 mA current from a 5V
supply. The module is available in a compact 24-pin 4x4
mm leadless SMT package.
Pin Configuration
Pin No.
1, 2, 4, 6, 7, 9, 11, 17,
18, 19, 21, 22, 24
3
5
8
10
12
13
14
15
16
20
23
Backside Paddle
Label
NC (No Connect)
DSA In
Amp1 Out / V
cc
Amp1 In
SOD
V
DD
CLK
DATA
LE
Amp2 Out / V
cc
Amp2 In
DSA Out
RF/DC Ground
Ordering Information
Part No.
TQM879028
TQM879028-PCB2140
Description
0.5 W 0.7−4.0 GHz DVGA
2.14 GHz Eval Board
(Includes EVH control board)
Standard T/R size = 2500 pieces on a 13” reel.
Datasheet: Rev C 3/22/13
© 2013 TriQuint
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