MACOM AT-232PIN Datasheet

Digital Attenuator, 30 dB, 4-Bit,
DC - 2 GHz

V 3.00

AT-232

Features

n Attenuation: 2 dB steps to 30 dB
n Temperature Stability: ± 0.18 dB from –55°C to +85°C

Typical

n Low DC Power Consumption
n Hermetic Surface Mount Package
n Fast Switching Speed, 12 ns Typical
n 50 Ohm Nominal Impedance

Description

M/A-COM’s AT-232 is a GaAs FET 4-bit digital attenuator
with a 2 dB minimum step size and 30 dB total attenuation.
This attenuator is in a hermetically sealed ceramic 16-lead
surface mount package. The AT-232 is ideally suited for
use where accuracy, fast switching, very low power
consumption and low intermodulation products are
required. Typical applications include dynamic range
setting in precision receiver circuits and other gain/leveling
control circuits. Environmental screening is available.
Contact the factory for information.

CR-6

Electrical Specifications1
(From –55°C to +85°C)

Parameter Test Conditions Frequency Units Min Typ Max

Reference Insertion Loss — DC - 0.5 GHz

Attenuation Accuracy 2 Any Single Bit

Any Combination of Bits

VSWR — DC - 2.0 GHz Ratio — — 1.6:1

Trise, Tfall 10% to 90% — ns — 12 —

Ton, Toff 50% Control to 90/10% RF — ns — 18 —

Transients In-Band (peak-peak) — mV — 25 —

1 dB Compression Input Power

Input Power

Input IP3 For two-tone Input Power

Up to +5 dBm

Input IP2 For two-tone Input Power

Up to +5 dBm

DC - 1.0 GHz
DC - 2.0 GHz

DC - 1.0 GHz
DC - 2.0 GHz

DC - 1.0 GHz
DC - 2.0 GHz

0.05 GHz

0.5 - 2.0 GHz

0.05 GHz

0.5 - 2.0 GHz

0.05 GHz

0.5 - 2.0 GHz

dB
dB
dB

± (0.15 dB +3% of atten setting in dB) dB

± (0.2 dB +3% of atten setting in dB) dB

Or ± 0.45 dB, whichever is greater
± (0.22 dB +3% of atten setting in dB) dB
± (0.25 dB +4% of atten setting in dB) dB

Or ± 0.45 dB, whichever is greater

dBm
dBm

dBm
dBm

dBm
dBm

—
—
—

—
—

—
—

—
—

—
—
—

+20
+28

+40
+50

+45
+68

2.0

2.3

2.5

—
—

—
—

—
—

1. All specifications apply when operated with control votlages of 0.0V to -5.0V.

2. This attenuator is guaranteed monotonic.

Digital Attenuator, 30 dB, 4-Bit, DC - 2 GHz

Electrical Specifications (From –55°C to +85°C)

Parameter Test Conditions Frequency Units Min Typ Max

Input Leakage Current (Low) -0.2 to 0V — µA — — 20

Input Leakage Current (High) -8.0 to -5.0V — µA — — 200

AT-232

V 3.00

Absolute Maximum Ratings 3

Parameter

Max Input Power

0.05 GHz

0.5 - 2.0 GHz

Control Voltage +0.5V, -8.5V

Operating Temperature -55°C to +125°C

Storage Temperature -65°C to +150°C

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

Absolute Maximum

+27 dBm
+34 dBm

Functional Schematic (Top View)

VC1

/VC1

VC2

/VC2

VC3

/VC3

VC4

/VC4

16 dB

8 dB

4 dB

2 dB

RF1

GND

GND

GND

GND

GND

GND Orientation Mark

RF2

Truth Table

Control Inputs

/VC4 VC4 /VC3 VC3 /VC2 VC2 /VC1 VC1 Atten.

(dB)

-5V 0V -5V 0V -5V 0V -5V 0V Ref.
0V -5V -5V 0V -5V 0V -5V 0V 2 dB

-5V 0V 0V -5V -5V 0V -5V 0V 4 dB

-5V 0V -5V 0V 0V -5V -5V 0V 8 dB

-5V 0V -5V 0V -5V 0V 0V -5V 16 dB
0V -5V 0V -5V 0V -5V 0V -5V 30 dB

Specifications subject to change without notice.

n North America: Tel. [phone]
n Asia/Pacific: Tel.[phone], Fax [phone]
n Europe: Tel. [phone], Fax[phone]

Visit www.macom.com for additional data sheets and product information.

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