TQM879008
1.5-2.7GHz ½ W Digital Variable Gain Amplifier
Applications
3G / 4G Wireless Infrastructure
CDMA, WCDMA, LTE
Repeaters
28-pin 6x6mm leadless SMT package
Product Features
1.5-2.7 GHz Frequency Range
41.1 dB Maximum Gain at 2.5 GHz
31.5 dB Gain Range in 0.5 dB Steps
+47.5 dBm Output IP3
+27.3 dBm Output P1dB
Fully Internally Matched Module
Integrated Blocking Capacitors, Bias Inductors
3-wire SPI Control Programming
Functional Block Diagram
28 Vcc_SPI
27 GND
26 GND
25 GND
24 GND
23 GND
22 NC
LE 1
DATA 2
CLK 3
NC 4
GND 5
RFIN 6
GND 7
Vcc_AMP1/
Vcc_AMP2 8
GND 9
AMP1
DC Biasing
DC Biasing
S
P
I
DSA
AMP2
Matching
AMP3
21 GND
20 GND
19 GND
18 GND
17 GND
Matching
16 RFOUT
15 GND
Vcc_AMP3 14
GND 10
GND 11
GND 12
GND 13
Backside
Paddle - GND
General Description
The TQM879008 is a digital variable gain amplifier
(DVGA) featuring high linearity over the entire gain
control range. This amplifier module integrates two gain
blocks, a digital-step attenuator (DSA), and a high linearity
½ W amplifier. The module has the added feature of
integrating all matching components, bias chokes and
blocking capacitors. The internal 6-bit DSA provides a
31.5 dB gain control range in 0.5 dB steps, and is
controlled with a serial periphery interface (SPI
TM
).
The TQM879008 features variable gain from 10 dB to
41.1dB at 2.5 GHz, +47.5 dBm output IP3, and +27.3 dBm
P1dB. The module operates from a single +5V supply and
is available in a compact 28-pin 6x6 mm leadless SMT
package.
The TQM879008 is pin compatible with the TQM829007
(0.7-1.0GHz, 0.25W DVGA) and TQM879006 (1.4-
2.7GHz, 0.25W DVGA). This allows one to size the right
type of device for specific system level requirements as
well as making the DVGA family ideal for applications
where a common PCB layout is used for different
frequency bands.
Pin Configuration
Pin #
1
2
3
4, 22
6
8
14
16
28
All Other Pins
Symbol
LE
DATA
CLK
NC
RFIN
VCC_AMP1/VCC_AMP2
VCC_AMP3
RFOUT
VCC_SPI
GND
Ordering Information
Part No.
TQM879008
Description
1.5-2.7 GHz Digital Variable Gain Amp
Fully Assembled Evaluation Board
TQM879008-PCB
Includes USB control board (EVH)
Standard T/R size = 2500 pieces on a 13” reel.
Data Sheet: Rev G 12/10/12
© 2012 TriQuint Semiconductor, Inc.
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Disclaimer: Subject to change without notice
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