MACOM AT-358 Datasheet

1 Bit, 10 dB, GaAs Digital Atten uator

0.02 - 2 GHz

Features

•CMOS Control Interface

•Low Power Consumption

Guaranteed Specifications

Frequency Range 0.02 – 2.0 GHz
Nominal Attenuation
Attenuation Accuracy 0.02 – 2.0 GHz +/-0.5 dB Max

VSWR 0.02 – 2.0 GHz 1.9:1 Max

Reference Insertion Loss

2

1

(From -55°Cto +85°C)

10 dB

0.02 – 1.0 GHz +/-0.3 dB Max

0.02 – 0.5 GHz +/-0.2 dB Max

0.02 – 0.2 GHz +/-0.2 dB Max

0.02 – 1.0 GHz 1.3:1 Max

0.02 – 0.5 GHz 1.3:1 Max

0.02 – 0.2 GHz 1.3:1 Max

0.02 – 2.0 GHz 2.7 dB Max

0.02 – 1.0 GHz 1.0 dB Max

0.02 – 0.5 GHz 0.9 dB Max

0.02 – 0.2 GHz 0.8 dB Max

Operating Characteristics

Impedance 50 Ohms Nominal
Switching Characteristics

Ton, Toff (50% CTL to 90%/10% RF) 100 ns Typ
Trise, Tfall (10%/90% or 90%/10% RF) 40 ns Typ

Switching Transients (Unfiltered) 50 mV Typ

Input Power for 1 dB Compression

0.5 – 2.0 GHz +24 dBm Typ

0.05 GHz +18 dBm Typ

Intermodulation Intercept Point (for two-tone input power up to +5 dBm)

Intercept Points IP2 IP3

0.5 – 2.0 GHz +58 +38 dBm Typ

0.05 GHz +54 +35 dBm Typ
Bias Power +5 VDC @ 1 mA Max
Control Voltages

Vin Low (0) 0.0 to 1.5V @ 1µA Max
Vin High (1) 3.5 to 5.0V @ 1µA Max

1.All specifications apply with 50 ohm impedance connected to all RF ports, with +5

VDC bias voltage.

2.Above reference insertion loss.

3.Contact the factoy for standard or custom screening requirements.

T0-8-2

0.250 MIN

0.200 TYP (5.08)

0.100 TYP (2.54)

P7

P4

0.60 DIA
(15.2 )

Unless Otherwise Noted: .xxx = ± 0.010 (.xx = ± 0.25)

P10

0.400 (10.16)
TYP

0.200 TYP (5.08)

P1

Bottom of Case is AC Ground
Dimensions in ( ) are in mm.

.xx = ± 0.02 (.x = ±0.5)

(6.35)

0.018 ± 0.005
PIN DIA

(0.46 ± 0.13)

Functional Sc hematic (T op View)

GND

10 dB

GND

GND

RF OUT

GND

+5V

GND

RF IN

GND

AT-358

0.187 MAX
(4.75)

Ordering Inf ormation

Model No. Package

AT-358 PIN TO-8-2

CI

GND

GND

Truth T able

C1 State

0 Reference Loss
1 Attenuation

Specifications Subject to Change Without Notice. V2.01

1-Bit, 10 dB, GaAs Digital Attenuator AT-358

Absolute Maximum Ratings

Parameter Absolute Maximum

Max. Input Power

0.05 GHz +27 dBm

0.5 – 2.0 GHz +32 dBm
Bias Voltage 0.5 to +7 V
Control Voltage -0.5 to V bias + 0.5 V
Operating Temperature –55˚C to +125˚C
Storage Temperature –65˚C to +150˚C

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

Typical Performance

REFERENCE INSERTION LOSS vs FREQUENCY

0

-0.5

-1.0

-1.5

LOSS (dB)

-2.0

1

VSWR vs FREQUENCY

2.0

1.8

LOSS STATE

1.6

VSWR

1.4

ATTENUATION STATE

1.2

-2.5

0.50.02

ATTENUATION FLATNESS vs FREQUENCY

+0.5

+0.25

0

-0.25

DEVIATION FROM

NOMINAL ATTENUATION (dB)

-0.5

0.02

0.5 1.0

FREQUENCY (GHz)

1.0

FREQUENCY (GHz)

1.5 2.0

1.5 2.0

1.0

0.50.02

FREQUENCY (GHz)

1.0

1.5 2.0

Specifications Subject to Change Without Notice. V2.01