TQM8M9077
0.05-4 GHz Digital Variable Gain Amplifier
Applications
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2G / 3G / 4G Wireless Infrastructure
LTE / WCDMA / CDMA / EDGE
IF and RF Applications
General Purpose Wireless
32-pin 5x5mm leadless SMT package
Product Features
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•
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•
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Integrates DSA + Amp Functionality
50-4000 MHz Broadband Performance
13 dB Gain @ 2.14 GHz
3.9 dB Noise Figure @ max gain setting
+21.5 dBm P1dB
+38.5 dBm OIP3
+5 V Supply Voltage
88 mA Operating Current
MTTF > 1000 Years
Functional Block Diagram
General Description
The TQM8M9077 is a digitally controlled variable gain
amplifier (DVGA) with a broadband frequency range of 50
to 4000 MHz. The DVGA features high linearity and low
noise while providing digital variable gain with a 31.5 dB
of range in 0.5 dB steps through a 6-bit serial mode control
interface. This combination of performance parameters
makes the DVGA ideal for receiver applications requiring
gain control with high IIP3.
The TQM8M9077 integrates a high performance digital
step attenuator and a high linearity, broadband gain block.
Both stages are internally matched to 50 Ohms and do not
require any external matching components. A serial output
port enables cascading with other serial controlled devices.
The TQM8M9077 is packaged in a RoHS-compliant,
compact 5x5 mm surface-mount leadless package.
Superior thermal design allows the product to have a
minimum MTTF rating of 1000 years at a mounting
temperature of +85º C.
The TQM8M9077 is targeted for use in wireless
infrastructure, point-to-point, or can be used for any general
purpose wireless application.
Pin Configuration
Pin #
1
2, 3, 13, 28, 30, 31, 32
4
5, 6, 7, 8, 9, 10
11, 15, 16, 18-24
14
12
17
25
26
27
29
Backside Paddle
Symbol
Ampin
GND (Ground)
ATTout
ACG1-6
NC (No Connect)
SOD
ATTin
Vdd
CLK
SID
LE
Ampout
RF/DC Ground
Ordering Information
Part No.
TQM8M9077
TQM8M9077-PCB
Description
Digital Variable Gain Amplifier
0.3-4.0 GHz Evaluation Board
Standard T/R size = 2500 pieces on a 13” reel.
Datasheet: Rev D 01-20-12
© 2012 TriQuint Semiconductor, Inc.
-
1 of 9
-
Disclaimer: Subject to change without notice
Connecting the Digital World to the Global Network
®
TQM8M9077
0.05-4 GHz Digital Variable Gain Amplifier
Specifications
Absolute Maximum Ratings
Parameter
Storage Temperature
RF Input Power, CW, 50 ,T = 25ºC
Supply Voltage (V
dd
)
Digital Input Voltage
Recommended Operating Conditions
Parameter
°
Rating
-65 to 150 C
+24 dBm
+6 V
V
dd
+0.5 V
Min
4.75
-40
Typ
5
87
Max Units
5.25
+85
190
V
mA
°
C
°
C
V
dd
I
dd
Operating Temp. Range
T
ch
(for >10
6
hours MTTF)
Operation of this device outside the parameter ranges given
above may cause permanent damage.
Electrical specifications are measured at specified test conditions.
Specifications are not guaranteed over all recommended operating
conditions.
Electrical Specifications
Test conditions unless otherwise noted: T
LEAD
=+25°C, V
dd
=+5V (Configured as DSA followed by Amp)
Parameter
Operational Frequency Range
Test Frequency
Gain
Gain Control Range
Gain Accuracy
Attenuation Step
Time
rise / fall
Time
on,
Time
off
Input Return Loss
Output Return Loss
Output P1dB
Output IP3
Noise Figure
Supply Voltage
Supply Current
Thermal Resistance (Rth)
Conditions
Min
50
Typical
Max
4000
Units
MHz
MHz
dB
dB
dB
dB
ns
ns
dB
dB
dBm
dBm
dB
V
mA
°
C/W
10% / 90% RF
50% CTL to 10% / 90% RF
See Note 1
At max gain level
Channel to case
2140
11
13
31.5
± (0.3 + 4% of Atten. Setting) Max
0.5
90
100
-17
-10.5
+21.5
+35.5
+38.5
3.9
+5
70
88
110
41
Notes:
1. OIP3 measured with two tones at an output power of +3 dBm / tone separated by 1 MHz. The suppression on the largest IM3 product is
used to calculate the OIP3 using a 2:1 rule.
Datasheet: Rev D 01-20-12
© 2012 TriQuint Semiconductor, Inc.
-
2 of 9
-
Disclaimer: Subject to change without notice
Connecting the Digital World to the Global Network
®
TQM8M9077
0.05-4 GHz Digital Variable Gain Amplifier
Serial Control Interface
The TQM8M9077 has a CMOS SPI
TM
input compatible serial interface. This serial control interface converts the serial data
input stream to parallel output word. The input is 3-wire (CLK, LE and SERIN) SPI
TM
input compatible. At power up, the
serial control interface resets the DSA to the minimum gain state. The 6-bit SERIN word is loaded into the register on rising
edge of the CLK, MSB first. When LE is high, CLK is disabled.
SERIN (MSB in First 6-Bit Word) Control Logic Truth Table
Test conditions: 25ºC, V
dd
= +5V
6-Bit Control Word to DSA
LSB
MSB
D5
1
1
1
1
1
1
0
0
D4
1
1
1
1
1
0
1
0
D3
1
1
1
1
0
1
1
0
D2
1
1
1
0
1
1
1
0
D1
1
1
0
1
1
1
1
0
D0
1
0
1
1
1
1
1
0
Gain Relative to
Maximum Gain
Reference : IL
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
Any combination of the possible 64 states will provide a reduction in gain of
approximately the sum of the bits selected.
Serial Control Interface Timing Diagram
CLK is disabled when LE is high
Datasheet: Rev D 01-20-12
© 2012 TriQuint Semiconductor, Inc.
-
3 of 9
-
Disclaimer: Subject to change without notice
Connecting the Digital World to the Global Network
®
TQM8M9077
0.05-4 GHz Digital Variable Gain Amplifier
Serial Control Timing Characteristics
Test conditions: 25ºC, V
dd
= +5V
Parameter
Clock Frequency
LE Setup Time, t
LESUP
LE Pulse Width, t
LEPW
SERIN set-up time, t
SDSUP
SERIN hold-time, t
SDHLD
LE Pulse Spacing t
LE
Propagation Delay t
PLO
Condition
50% Duty Cycle
after last CLK rising edge
before CLK rising edge
after CLK rising edge
LE to LE pulse spacing
LE to Parallel output valid
Min
10
30
10
10
630
Max
10
Units
MHz
ns
ns
ns
ns
ns
ns
30
Serial Control DC Logic Characteristics
Test conditions: 25ºC, V
dd
= +5V
Parameter
Low State Input Voltage
High State Input Voltage
Output High Voltage
Output Low Voltage
Input Current, I
IH
/ I
IL
Condition
Min
0
2.1
2.0
0
-10
Max
0.8
Vdd
Vdd
0.8
+10
Units
V
V
V
V
µA
On SEROUT
On SEROUT
On SERIN, LE and CLK
Datasheet: Rev D 01-20-12
© 2012 TriQuint Semiconductor, Inc.
-
4 of 9
-
Disclaimer: Subject to change without notice
Connecting the Digital World to the Global Network
®
TQM8M9077
0.05-4 GHz Digital Variable Gain Amplifier
Reference Design 300-4000 MHz
Notes:
1. See PC Board Specifications section for material and stackup.
2. C4, C5, C6 and C7 may be removed for operation above 700 MHz.
Bill of Material
Ref Des
U1
L1 (Note 4)
C1, C2, C3
C4, C5, C6, C7
C8
C11
Value
n/a
47 nH
68 pF
330 pF
1000 pF
0.01 uF
Description
Digital Variable Gain Amp
Inductor, 0603
Capacitor, 0402
Capacitor, 0402
Capacitor, 0603
Capacitor, 0603
Manufacturer
TriQuint
Coilcraft
various
various
various
various
Part Number
TQM8M9077
0603CS-47NXJLW
Note 4: For IF applications (<300 MHz) increase L1 to 330 nH.
Datasheet: Rev D 01-20-12
© 2012 TriQuint Semiconductor, Inc.
-
5 of 9
-
Disclaimer: Subject to change without notice
Connecting the Digital World to the Global Network
®
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