Datasheet TGL6425-SCC Datasheet (TriQuint Semiconductor)

T R I Q U I N T S E M I C O N D U C T O R , I N C .

TGL6425-SCC Digital Attenuator

6425

0.5 to 18-GHz Frequency Range

●

5- Bit Step Attenuator

●

15.5-dB Attenuation Range

●

4-dB Typical Inser tion Loss

●

1.6:1 Input/Output SWR

●

2,1844 x 1,8288 x 0,1016 mm (0.086 x 0.072 x 0.004 in.)

●

PHOTO ENLARGEMENT

DESCRIPTION

The TriQuint TGL6425-SCC is a GaAs MMIC 5-bit FET attenuator which operates fr om

0.5 to 18-GHz. The attenuation step is 0.5- dB and is controlled by 10 input lines. Control bias voltages
are 0 V and - 5 V. The input and output return loss is typically 13 -dB.

This unique absorptive design combines both “T”and “PI”configurations to produce an extremely
small size and low inser tion loss attenuator. The small size and reliability advantage of a monolithic
attenuator over a hybrid design make this device attractive for use in electronic war fare, radar,
telecommunication, and navigation systems for level set, modulation and switching functions.

Bond pad and backside metallization is gold plated for compatibility with eutectic alloy attachment
method as well as the thermocompression and thermosonic wire bonding processes. Ground is
provided to the circuitry through vias to the backside metallization.

TriQuint Semiconductor, Inc. • Texas Facilities • [phone]

• www.triquint.com

TGL6425-SCC

TYPICAL ATTENUATION

TYPICAL
INPUT POWER

P

1dB

0

-5

-10

-15

Attenuation (dB)

-20

-25
024681012141618

Frequency (GHz)

35

30

25

20

15

10

Input Power (dBm)

5

0

0369121518

Frequency (GHz )

TA= 25°C

Attenuation
State:

TA= 25°C

Attenuation
State:

0 dB
2 dB
4 dB
8 dB

15.5 dB

0 dB

2 dB

4 dB

8 dB

15.5 dB

TYPICAL

7

INPUT RETURN LOSS

13

19

25

31

Input Return Loss (dB)

37

43

0369121518

TriQuint Semiconductor, Inc. • Texas Facilities • [phone]

Frequency (GHz )

• www.triquint.com

T = 25°C

Attenuation
State:

0 dB
2 dB
4 dB
8 dB

15.5 dB

2

TGL6425-SCC

TYPICAL
OUTPUT RETURN LOSS

ABSOLUTE
MAXIMUM RATINGS

0

6

12

18

24

Output Return Loss (dB)

30

36

0369121518

TA= 25°C

Attenuation
State:

0dB
2dB
4dB

8dB

15.5dB

Frequency (GHz )

Input continuous wave power , P

.......................................................................................................... 1 W

IN

Control voltage range, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10 ................................................-10 V to 0 V

Operating channel temperature, TCH* ................................................................................................ 150 °C

Mounting temperature (30 sec), TM .................................................................................................... 320°C

Storage temperature range, T

Ratings over operating channel temperature range, TCH(unless otherwise noted)

............................................................................................-65 to 150°C

STG

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any other conditions beyond
those indicated under “RF Characteristics” is not implied. Exposure to absolute maximum rated conditions for
extended periods may affect device reliability.

*Operating channel temperature, TCH, will directly affect the device MTTF . For maximum life, it is recommended

that channel temperature be maintained at the lowest possible level.

RF CHARACTERISTICS

PARAMETER TEST CONDITIONS TYPICAL UNIT

Attenuation see next table dB
SWR(in) Input standing wave ratio
SWR(out) Output standing wave ratio
P

(in) Input power at 1-dB gain compression see next table dBm

1dB

TriQuint Semiconductor, Inc. • Texas Facilities • [phone]

f = 2 - 18 GHz (all states) 1.6:1 -

f = 2 - 18 GHz (all states) 1.4:1 -

TA = 25°C

• www.triquint.com

3

TGL6425-SCC

RF CHARACTERISTICS

BIAS TRUTH TABLE

ATTENUATION TYPICAL TYPICAL INPUT POWER

STATE

(dB)

TYPICAL

ATTENUATION

at 9 GHz (dB) at 9 GHz (dB) 2-18 GHz (dBm)

VARIANCE

1–dB Gain Compression

at

0 3.6 ± 0.25 28

0.5 4.1 ± 0.25 28
1 4.4 ± 0.25 29
2 5.7 ± 0.25 29
4 7.6 ± 0.25 29
8 12.1 ± 0.45 20

15.5 19.7 ± 0.7 20

ATTEN
STATE V

(dB)

1

V

2

V

3

V

4

V

5

V

6

V

7

V

8

V

9

V

10

0.0-50-5-5-50000-5

0.5-50-5-5-500000

1.0 -5 0 -5 -5 0 0 -5 -5 0 -5

1.5 -5 0 -5 -5 0 0 -5 -5 0 0

2.0-50-50-5-500-5-5

2.5-50-50-5-500-50

3.0 -5 0 -5 0 0 -5 0 -5 -5 -5

3.5 -5 0 -5 0 0 -5 0 -5 -5 0

4.0-500-5-5-5-5 0 0-5

4.5-500-5-5-5-5 0 00

5.0-500-50-5-50-5-5

5.5-500-50-5-50-50

6.0 -5 0 0 0 -5 -5 -5 -5 0 -5

6.5 -5 0 0 0 -5 -5 -5 -5 0 0

7.0-50000-5-5-5-5-5

7.5-50000-5-5-5-50

8.00-5-5-5-50000-5

8.50-5-5-5-500000

9.0 0 -5 -5 -5 0 0 -5 -5 0 -5

9.5 0 -5 -5 -5 0 0 -5 -5 0 0

10.0 0 -5 -5 0 -5 -5 0 0 -5 -5

10.5 0 -5 -5 0 -5 -5 0 0 -5 0

11.0 0 -5 -5 0 0 - 5 0 -5 -5 -5

11.5 0 -5 -5 0 0 - 5 0 -5 -5 0

12.0 0 -5 0 -5 -5 - 5 -5 0 0 -5

12.5 0 -5 0 -5 -5 - 5 -5 0 0 0

13.0 0 -5 0 -5 0 -5 - 5 0 -5 -5

13.5 0 -5 0 -5 0 -5 - 5 0 -5 0

14.0 0 -5 0 0 - 5 - 5 - 5 - 5 0 -5

14.5 0 -5 0 0 - 5 - 5 - 5 - 5 0 0

15.0 0 -5 0 0 0 -5 -5 -5 -5 -5

15.5 0 -5 0 0 0 -5 -5 -5 -5 0

TriQuint Semiconductor, Inc. • Texas Facilities • [phone]

• www.triquint.com

4

TGL6425-SCC

EQUIVALENT
SCHEMATIC

BIAS NETWORK

RF
INPUT

100mm

2 - 290mm

V

V

2

1

2 - 32mm

2 - 62mm

V

3

RF Input

2 - 16mm

V

4

2 - 186mm

2 - 70mm

2 - 30mm

2 - 32mm

2 - 16mm

2 - 62mm

RF
OUTPUT

2 - 50mm

2 - 55mm

V

10

V5V

V9V

8

10

6

7

RF Output

V7V6V

5

V

V2V

1

3

3245

1

TGL6425

1112 10 9 8

V9V8V6V7V

4

All bias resistors have a nominal value of 25 - Ohms.
RF connections: Bond using two 1-mil diameter , 20 to 25-mil- length gold bond wires at both RF Input and

RF Output for optimum RF performance.
DC blocks are not provided at RF por ts.
Close placement of external components is essential to resonant-free performance.

TriQuint Semiconductor, Inc. • Texas Facilities • [phone]

• www.triquint.com

5

MECHANICAL DRAWING

TGL6425-SCC

1,8288 (0.0720)

1,6358 (0.0644)

1,0592 (0.0417)

0,1880 (0.0074)

0.0

1

0.0

1,3970 (0.055)

23456

89101112

2,0396 (0.0803)

7

1,0592 (0.0417)

0,5029 (0.0198)

Units: Millimeters (inches)
Thickness: 0,102 (0.004) (reference only)
Chip edge to bond pad dimensions are shown to center of bond pad.
Chip size ±0,0508 (0.002)

Bond pad #1 (RF In): 0,127 x 0,207 (0.0050 x 0.0082) Bond pad #7 (RF Out): 0,246 x 0,119 (0.0097 x 0.0047)
Bond pad #2 (V
Bond pad #3 (V
Bond pad #4 (V
Bond pad #5 (V
Bond pad #6 (V

): 0,120 x 0,120 (0.0047 x 0.0047) Bond pad #8 (V4): 0,120 x 0,120 (0.0047 x 0.0047)

1

): 0,120 x 0,120 (0.0047 x 0.0047) Bond pad #9 (V7): 0,120 x 0,120 (0.0047 x 0.0047)

3

): 0,120 x 0,120 (0.0047 x 0.0047) Bond pad 1#0 (V6): 0,120 x 0,120 (0.0047 x 0.0047)

2

): 0,120 x 0,120 (0.0047 x 0.0047) Bond pad #11 (V8): 0,120 x 0,120 (0.0047 x 0.0047)

5

): 0,120 x 0,120 (0.0047 x 0.0047) Bond pad #12 (V9): 0,120 x 0,120 (0.0047 x 0.0047)

10

TriQuint Semiconductor, Inc. • Texas Facilities • [phone]

0,8077 (0.0318)

1,1049 (0.0435)

• www.triquint.com

1,3691 (0.0539)

1,7145 (0.0675)

2,1844 (0.0860)

6

Application Notes: Suggested Driver Circuit

TGL6425-SCC

OVERVIEW

DRIVER CIRCUIT
SCHEMATIC

The following is a suggested driver circuit for the TriQuint TGL6425-SSC 0.5 to 18 - Ghz
step attenuator. The circuit allows the user to use a digital binary input to achieve the desired level
of attenuation; with a digital word of “00000” equaling0 -dB r elative attenuation and “11111”
equaling 15.5- dB relative attenuation. The JFET s (2N5116 or equivalent) provide the r equired level
shift from TTL voltages to attenuation control levels. The 2 - input NOR gates should be CMOS
(74C02 or equivalent) with 0 V applied to the positive supply terminal and -5 V on the negative
supply terminal.

~ 5k Ohms

TriQuint Semiconductor, Inc. • Texas Facilities • [phone]

• www.triquint.com

7