MACOM AT-106PIN Datasheet

Digital Attenuator, 50 dB, 6-Bit,
TTL Driver, DC - 2 GHz

V 5.00

AT-106

Features

n Attenuation: 1 dB steps to 50 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 Integral TTL Driver
n 50 Ohm Nominal Impedance

Description

M/A-COM’s AT-106 is a GaAs FET 6-bit digital attenuator
with a 1 dB minimum step size and 50 dB total attenuation.
This attenuator and integral TTL driver is in a hermetically
sealed ceramic 24-lead surface mount package. The AT­106 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.

Electrical Specifications1

CR-13

(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

(For attenuation to 26 dB)

Any Combination of Bits

(For attenuation 27 to 50 dB)

VSWR — 0.05 - 0.10 GHz

Trise, Tfall 10% to 90% — ns — 9 —

Ton, Toff 50% Control to 90/10% RF — ns — 45 —

Transients In-Band (peak-peak) — mV — 40 —

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
Vcc — — V 4.5 5.0 5.5
Vee — — V -8.0 — -5.0

DC - 1.0 GHz
DC - 2.0 GHz

DC - 2.0 GHz
DC - 2.0 GHz

DC - 1.5 GHz

0.101 - 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

dB
dB

dB

Ratio
Ratio — —

dBm
dBm

dBm
dBm

dBm
dBm

—
—
—

± (0.3 +4% of atten. setting)
± (0.4 +4% of atten. setting)

± (0.5 +5% of atten. setting)

—
—

—
—

—
—

—
—
—

—
—

+20
+28

+34
+46

+75
+79

3.6

4.1

4.6

2.0:1

1.8:1

—
—

—
—

—
—

1. All specifications apply when operated with bias voltages of +5V for Vcc and –5.0V for Vee.

2. This attenuator is guaranteed monotonic.

Digital Attenuator, 50 dB, 6-Bit, TTL Driver, DC - 2 GHz

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

Parameter Test Conditions Frequency Units Min Typ Max

Icc Vcc = 4.5 to 5.5V

Iee Vee = -5.0 to -8.0V — mA — — 1.0

Vctl
Vctl

Input Leakage Current (Low) 0 to 0.8V — µA — — 1.0

Input Leakage Current (High) 2.0 to 5.0V — µA — — 1.0

Vctl = 0 to 0.8V, or Vcc –2.1V to Vcc

Logic 0 (TTL)
Logic 1 (TTL)

AT-106

V 5.00

— mA — — 6.0

—
—

V
V

0.0

2.0

—
—

0.8

5.0

Absolute Maximum Ratings 3

Parameter

Max Input Power

0.5 GHz

0.5 - 2.0 GHz

Supply Voltages

Vcc
Vee

Control Voltage 4 -0.5V to Vcc +0.5V

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.

4. Standard CMOS TTL interface, latch-up will occur if logic
signal is applied prior to power supply.

Absolute Maximum

+27 dBm
+34 dBm

+5.5V

-8.5V

Functional Schematic (Top View)

PIN 1 GND

GND

GND

C32

C16

Vee (-5V to -8V)

Vcc (+5V)

PIN 12 GND

32 dB

16 dB

8 dB

C8
C4
C2

C1

4 dB

2 dB

1 dB

RF1 PIN 24

GND

GND

GND

GND

GND

GND

GND

GND

GND Orientation Mark
GND

RF2 PIN 13

Truth Table

Control Inputs

C6 C5 C4 C3 C2 C1 Attenuation

0 0 0 0 0 0 Reference
0 0 0 0 0 1 1 dB
0 0 0 0 1 0 2 dB
0 0 0 1 0 0 4 dB
0 0 1 0 0 0 8 dB
0 1 0 0 0 0 16 dB
1 0 0 0 0 0 32 dB
1 1 1 1 1 1 63 dB

0 = TTL Low 1 = TTL High

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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