MACOM AT20-0106TR, AT20-0106-TB, AT20-0106 Datasheet

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

AT20-0106

CR-13

V 5.00

Features

n Attenuation: 1 dB steps to 50 dB
n Temperature Stability: ± 0.18 dB from –40°C to +85°C

Typical

n Low DC Power Consumption
n Surface Mount Package
n Integral TTL Driver
n High Intercept Point
n Low Cost/High Performance
n 50 Ohm Nominal Impedance

Description

M/A-COM’s AT20-0106 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
ceramic 24-lead surface mount package. The AT20-0106 is
ideally suited for use where accuracy, fast switching, 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. Available with enhanced performance as
fully hermetic version. Environmentally screenable as P/N
AT-106.

Electrical Specifications: TA = 25°C1

Parameter Test Conditions Frequency Units Min Typ Max

Reference Insertion Loss — DC - 0.5 GHz

DC - 1.0 GHz
DC - 2.0 GHz

dB
dB
dB

—
—
—

3.0

3.5

4.0

3.6

4.1

4.6

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)

DC - 2.0 GHz
DC - 2.0 GHz

DC - 1.5 GHz

dB
dB

dB

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

± (0.5 +5% of atten. setting)

VSWR — 0.05 - 0.10 GHz

0.101 - 2.0 GHz

Ratio
Ratio — —

—
—

2.0:1

1.8:1

Trise, Tfall 10% to 90% — ns — — 50

Ton, Toff 50% Control to 90/10% RF — ns — — 150

Transients In-Band (peak-peak) — mV — 50 —

1 dB Compression Input Power

Input Power

0.05 GHz

0.5 - 2.0 GHz

dBm
dBm — —

+20
+28

—
—

Input IP3 For two-tone Input Power

Up to +5 dBm

0.05 GHz

0.5 - 2.0 GHz

dBm
dBm — —

+34
+46

—
—

Input IP2 For two-tone Input Power

Up to +5 dBm

0.05 GHz

0.5 - 2.0 GHz

dBm
dBm — —

+75
+79

—

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

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

AT20-0106

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.

V 5.00

2

Parameter Test Conditions Frequency Units Min Typ Max

Icc Vcc = 4.5 to 5.5V

Vctl = 0 to 0.8V, or Vcc –2.1V to Vcc

— mA — — 6.0

Iee Vee = -5.0 to -8.0V — mA — — 1.0

Electrical Specifications: TA = 25°C

Absolute Maximum Ratings 3

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.

Parameter

Absolute Maximum

Max Input Power

0.5 GHz

0.5 - 2.0 GHz

+27 dBm
+34 dBm

Supply Voltages

Vcc
Vee

+5.5V

-8.5V

Control Voltage 4 -0.5V to Vcc +0.5V

Operating Temperature -40°C to +125°C

Storage Temperature -65°C to +150°C

Truth Table

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

Control Inputs

Functional Schematic (Top View)

PIN 1 GND

GND

GND

C32

C16

Vee (-5V to -8V)

Vcc (+5V)

C8

GND

GND

GND

GND

GND

GND

RF1 PIN 24

32 dB

16 dB

8 dB

4 dB

2 dB

1 dB

GND

GND

GND Orientation Mark
GND

RF2 PIN 13

C4
C2

C1

PIN 12 GND

0 = TTL Low 1 = TTL High