MACOM AT-107PIN Datasheet

Digital Attenuator, 31.5 dB, 6-Bit,
TTL Driver, DC - 2 GHz

V 4.00

AT-107

Features

n Attenuation: 1 dB steps to 31.5 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-107 is a GaAs FET 6-bit digital attenuator
with a 1 dB minimum step size and 31.5 dB total
attenuation. This attenuator and integral TTL driver is in a
hermetically sealed ceramic 24-lead surface mount package.
The AT-107 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-13

Electrical Specifications: TA = -55°C to +85°C 1

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 — — 1.8:1

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

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

2. This attenuator is guaranteed monotonic.

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 +3% of atten. setting in dB) dB

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

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

dBm
dBm

dBm
dBm

dBm
dBm

—
—
—

or ± 0.4 dB, whichever is greater
or ± 0.4 dB, whichever is greater

—
—

—
—

—
—

+21
+29

+35
+48

+75
+79

—
—
—

3.2

3.6

4.0

—
—

—
—

—
—

Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 2 GHz

Electrical Specifications: TA = -55°C to +85°C

Parameter Test Conditions Frequency Units Min Typ Max

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

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-107

V 4.00

— 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

C16

Vee (-5V to -8V)

Vcc (+5V)

C0.5

PIN 12 GND

16 dB

8 dB

C8

C4

C2
C1

4 dB

2 dB

1 dB

0.5 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 0.5 dB
0 0 0 0 1 0 1 dB
0 0 0 1 0 0 2 dB
0 0 1 0 0 0 4 dB
0 1 0 0 0 0 8 dB
1 0 0 0 0 0 16 dB
1 1 1 1 1 1 31.5 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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