TQP4M9072
High Linearity 6-Bit, 31.5 dB Digital Step Attenuator
Applications
Mobile Infrastructure
LTE / WCDMA / CDMA / EDGE
Test Equipments and Sensors
IF and RF Applications
General Purpose Wireless
24-pin 4x4 mm leadless QFN package
Product Features
DC – 4 GHz
0.5 dB LSB Steps to 31.5 dB
+57 dBm Input IP3
1.7 dB Insertion Loss at 2.2 GHz
Serial Control Interface
No requirement for external bypass capacitors for
operation above 700 MHz
50 Ω Impedance
+5 V Supply Voltage. 3.3V TTL logic compatible
Functional Block Diagram
General Description
The TQP4M9072 is a high linearity, low insertion loss, 6
bit, 31.5 dB Digital Step Attenuator (DSA) operating over
the DC – GHz frequency range. The digital step
attenuator uses a single positive +5 V supply and has a
serial periphery interface (SPI
TM
) for changing
attenuation states. This product maintains high
attenuation accuracy over frequency and temperature.
No external matching components are needed for the
DSA. The product has an added feature of not requiring
external AC ground capacitors for operation above 700
MHz.
The TQP4M9072 is available in a standard lead-free
/green/RoHS-compliant 24-pin 4x4mm QFN package.
Also available from TriQuint is the TQP4M9071, a
footprint and pin compatible DSA with a parallel control
interface.
Pin Configuration
Pin No.
1, 16-17, 19-24
2
3
4
6
13
15
18
7, 8, 9, 10, 11, 12
5, 14
Backside Pad
Label
N/C
CLK
SERIN
LE
RF IN
RF OUT
SEROUT
V
DD
ACGND1 – ACGND6
GND
GND
Ordering Information
Part No.
Description
TQP4M9072
6 Bit, 31.5 dB DSA
TQP4M9072-PCB_ IF 40 – 500 MHz Evaluation Board
TQP4M9072-PCB_RF 0.7 – 4 GHz Evaluation Board
PCB includes USB control interface board, EVH.
Standard T/R size = 2500 pieces on a 13” reel.
Disclaimer: Subject to change without notice
Datasheet: Rev O 11-20-14
© 2014 TriQuint
- 1 of 12 -
www.triquint.com
TQP4M9072
High Linearity 6-Bit, 31.5 dB Digital Step Attenuator
Absolute Maximum Ratings
Parameter
Storage Temperature
Junction Temperature
RF Input Power, 50 Ω,T = 85 °C
Device Voltage (V
DD
)
Digital Input Voltage
Recommended Operating Conditions
Parameter
Device Voltage (V
DD
)
Case Temperature
Rating
−55
to 150 °C
150 °C
+28 dBm
+6.0 V
V
DD
+ 0.5 V
Min
+3.3
−40
Typ
+5
Max Units
+5.25
+105
V
°C
Electrical specifications are measured at specified test
conditions. Specifications are not guaranteed over all
recommended operating conditions.
Operation of this device outside the parameter ranges
given above may cause permanent damage.
Electrical Specifications
Test conditions:
V
DD
=+5
V, Temp= +25
°C, 50
Ω
system, Mode 1, No external bypass capacitors used on pins 7 – 12.
Parameter
Operational Frequency
Range
Insertion Loss
Return Loss
Conditions
See Note 1 and 2.
1.0 GHz
2.0 GHz
2.2 GHz
3.5 GHz
All States
0.04 – 2.7 GHz, All States,
Mode 2
0.7 – 2.7 GHz, All States,
Mode 1 or Mode 2
2.7 – 3.5 GHz, All States,
Mode 1 or Mode 2
To be monotonic (Step Attenuation
≥
0)
Input Power = +15 dBm / tone, All States
All States, DC – 4 GHz
10% / 90% RF
50% CTL to 10% / 90% RF
Min
DC
Typ
1.3
1.6
1.7
2.1
17
Max
4000
Units
MHz
dB
dB
2.2
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
ns
ns
V
mA
± (0.3 + 3% of Atten. Setting) Max
± (0.3 + 3% of Atten. Setting) Max
± (0.4 + 4% of Atten. Setting) Max
0
0.5
+57
+30
90
100
+5
2.0
Accuracy Error
Attenuation Step
Input IP3
Input P0.1 dB
Time
rise / fall
Time
On
, Time
Off
Supply Voltage, V
DD
Supply Current, I
DD
Notes:
1. In Mode 1 no external bypass capacitors are used and operating frequency is 0.7 – 4GHz. See detailed device description.
2. In Mode 2 external bypass capacitors are used and operating frequency may be extended to 0.04 – 4GHz. See detailed device
description.
Datasheet: Rev O 11-20-14
© 2014 TriQuint
- 2 of 12 -
Disclaimer: Subject to change without notice
www.triquint.com
TQP4M9072
High Linearity 6-Bit, 31.5 dB Digital Step Attenuator
Serial Control Interface
The TQP4M9072 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 SID) SPI
TM
input compatible. At power up,
the serial control interface resets the DSA to the minimum gain state. The 6-bit SID (Serial Input Data) word is loaded
into the register on rising edge of the CLK, MSB first. When LE is high, CLK is internally disabled.
Serial Control Timing Characteristics
(Test conditions: V
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
dd
= +5 V, Temp.=25°C)
Condition
50% Duty Cycle
after last CLK rising edge
before CLK rising edge
after CLK rising edge
LE to LE pulse spacing
Min
10
30
10
10
630
= +5 V, Temp.=25°C)
Max
10
Units
MHz
ns
ns
ns
ns
ns
Serial Control DC Logic Characteristics
(Test conditions: V
Parameter
Input Low State Voltage, V
IL
Input High State Voltage, V
IH
Output High State Voltage, V
OH
Output Low State Voltage, V
OL
Input Current, I
IH
/ I
IL
dd
Condition
Min
0
2.4
2.0
0
−10
Max
0.8
V
dd
V
dd
0.8
+10
Units
V
V
V
V
µA
On SOD pin
On SOD pin
On SID, LE and CLK pins
Serial Control DC Logic Characteristics
(Test conditions: V
Input Low State Voltage, V
IL
Input High State Voltage, V
IH
Input Current, I
IH
/ I
IL
On SID, LE and CLK pins
dd
= +3.3 V, Temp.=25°C)
0
2.8
−10
0.8
V
dd
+10
V
V
µA
SERIN Control Logic Truth Table
6-Bit Control Word
MSB
LSB
Timing Diagram
CLK is internally disabled when LE is high
Attenuation
State
Reference : IL
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
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
Any combination of the possible 64 states will provide an
attenuation of approximately the sum of bits selected
Datasheet: Rev O 11-20-14
© 2014 TriQuint
- 3 of 12 -
Disclaimer: Subject to change without notice
www.triquint.com
TQP4M9072
High Linearity 6-Bit, 31.5 dB Digital Step Attenuator
Detailed Device Description
The TQP4M9072 is a high linearity, low insertion loss, wideband, 6-bit, 31.5 dB digital step attenuator. The digital step
attenuator uses a single 5 V supply and has a CMOS SPI
TM
controller. This product maintains high attenuation
accuracy over frequency and temperature. The product does not require any external bypass capacitors on AC
ground pins for operation above 700 MHz. The DSA performance remains unchanged for frequency range 0.7 – 4 GHz
in either Mode 1 or Mode 2. The operating frequency may be extended to low frequency range (0.04 – 0.7 GHz) with
external bypass capacitors on AC ground pins (ACGND1-ACGND6).
Further assistance may be requested from TriQuint Applications Engineering:
Email:
sjcapplications.engineering@triquint.com
Functional Schematic Diagram
Datasheet: Rev O 11-20-14
© 2014 TriQuint
- 4 of 12 -
Disclaimer: Subject to change without notice
www.triquint.com
TQP4M9072
High Linearity 6-Bit, 31.5 dB Digital Step Attenuator
Typical Performance Plots
Performance plots data is measured using Bias Tee on RF ports in Mode 2 configuration. Mode 2 operation is
required to obtain performance at frequencies lower than 0.7 GHz. For frequency range 0.7 – 4.0 GHz, data is
identical in Mode 1 and Mode 2.
0
Insertion Loss
Vdd = 5V
Attenuation
0
-5
Only Major States, Vdd = 5V, 25
o
C
Insertion Loss (dB)
Insertion Loss (dB)
-1
-10
-15
-20
-25
-30
-35
0.5dB
1dB
2dB
4dB
8dB
16dB
31.5dB
-2
-3
+25C
-4
0
500
1000
1500
2000
2500
3000
3500
4000
Frequency (MHz)
-40C
+85C
0
500
1000
1500
2000
2500
3000
3500
4000
Frequency (MHz)
0
-5
-10
-15
-20
-25
-30
-35
0
500
0dB
Input Return Loss
Only Major States, Vdd = 5V, 25C
Output Return Loss
0
Only Major States, Vdd = 5V, 25C
0dB
1dB
2dB
4dB
8dB
16dB
31.5dB
16dB
31.5dB
Output Return Loss (dB)
1dB
2dB
4dB
8dB
-5
-10
-15
-20
-25
-30
-35
-40
-45
Input Return Loss (dB)
1000
1500 2000 2500
Frequency (MHz)
3000
3500
4000
0
500
1000
1500 2000 2500
Frequency (MHz)
3000
3500
4000
0
-5
-10
-15
-20
-25
-30
0
Input Return Loss vs. Temperature
Vdd = 5V, Attenuation State = 0dB
Output Return Loss vs. Temperature
0
Vdd = 5V, Attenuation State = 0dB
25C
-40C
85C
Output Return Loss (dB)
3500
4000
25C
-40C
85C
Input Return Loss (dB)
-5
-10
-15
-20
-25
-30
500
1000
1500 2000 2500
Frequency (MHz)
3000
0
500
1000
1500 2000 2500
Frequency (MHz)
3000
3500
4000
Datasheet: Rev O 11-20-14
© 2014 TriQuint
- 5 of 12 -
Disclaimer: Subject to change without notice
www.triquint.com
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