MACOM AT-109TR, AT-109RTR, AT-109 Datasheet

Voltage Variable Absorptive Attenuator, 35 dB

0.5 - 2 GHz AT-109

V 2.00

F e a t u r e s

●

Single Positive Voltage Control 0 to +5 Vo l t s

●

35 dB Attenuation Range at 0.9 GHz

●

±2 dB Linearity from BSL

●

Low DC Power Consumption

●

Te m p e r a t u re Range: -40°C to +85°C

●

Low-Cost SOIC 8 Plastic Package

●

Tape and Reel Packaging Av a i l a b l e

D e s c r i p t i o n

M/A-COM’s AT-109 is a GaAs MMIC voltage variable
absorptive attenuator in a low-cost SOIC 8-lead surf a c e
mount plastic package. The AT-109 is more linear than
the higher attenuation range AT-108. The AT-109 is ide­ally suited for use where linear attenuation fine tuning
and very low power comsumption are re q u i red. Ty p i c a l
applications include radio, cellular, GPS equipment and
automatic gain/level control circ u i t s .

The AT-109 is fabricated with a monolithic GaAs MMIC
using a mature 1-micron process. The process feature s
full chip passivation for increased perf o rmance and re l i­a b i l i t y .

S O - 8

O rdering Info r m a t i o n

Part No. Package

AT-109 SOIC 8-Lead Plastic Package
AT-109TR Forward Tape & Reel*
AT-109RTR Reverse Tape & Reel*

If specific reel size is required, consult factory for part number

*

assignment.

Electrical Specifications1,TA= +25°C

Parameter Test Conditions

Insertion Loss 0.5 - 1.0 GHz dB 2.5 2.7

Attenuation 0.5 - 1.0 GHz dB 35

Flatness 0.5 - 1.0 GHz dB ±0.5 ±0.8

(Peak-to-Peak) 1.0 - 2.0 GHz dB ±1.2 ±1.5

VSWR 2:1

Trise, Tfall 10% to 90% RF, 90% to 10% RF mS 25

Ton, Toff 50% Control to 90% RF, Control to 10% RF mS 35

Transients In-band mV 12

1. All measurements at 1 GHz in a 50-V system, unless otherwise specified.The RF ports must be blocked outside of the package
from ground or any other voltage.

1

1.0 - 2.0 GHz dB 3.2 3.5

1.0 - 2.0 GHz dB 30

Unit Min. Typ. Max

Voltage Variable Absorptive Attenuator, 35 dB AT-109

Absolute Maximum Ratings

1

Functional Sch e m a t i c

Parameter Absolute Maximum

Maximum Input Power +21 dBm
Supply Voltage V
Control Voltage V

CC

CC

-1 V, +8 V

-1 V, VCC+ 0.5 V
Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C

1. Operation of this device above any one of these parameters may
cause permanent damage.

VCC= +5 VDC ±0.5 VDC @ 50 µA max.
VC= 0 VDC to +5 VDC @ 50 µA max.
External DC blocking capacitors are required on all RF ports.

Typical Performance

V 2.00

ATTENUATION vs CONTROL VOLTAGE
@ +25°C, F = 1800 MHz

0

-5

-10

-15

-20

-25

-30

-35
5 4 3 2 1 0

CONTROL VOLTAGE (VOLTS)

RELATIVE ATTENUATION vs CONTROL VOLTAGE
@ +25°C, F = 900 MHz

0

-10

-20

-30

-40
5 4 3 2 1 0

CONTROL VOLTAGE (VOLTS)

INSERTION LOSS vs FREQUENCY

4.0

3.0

2.0

1.0

0

0.5 1.0 1.5 2.0

FREQUENCY (GHz)

ATTENUATION vs TEMPERATURE,
NORMALIZED TO +25°C, F = 900 MHz

3.5

2.5

1.5

+85°C

0.5

-0.5

-1.5
5 4 3 2 1 0

CONTROL VOLTAGE (VOLTS)

-40°C