MACOM AT20-0107TR, AT20-0107-TB, AT20-0107 Datasheet

Digital Attenuator, 31.5 dB, 6-Bit,
TTL Driver, DC - 2.0 GHz

V 4.00

AT20-0107

Features

n Attenuation: 0.5 dB Steps to 31.5 dB
n Temperature Stability: ±0.18 dB from –40ºC to +85ºC

Typ.

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

1

Description

M/A-COM's AT20-0107 is a GaAs FET 6-bit digital
attenuator with a 0.5 dB minimum step size and a 31.5 dB
total attenuation. This attenuator and integral TTL driver is
in a ceramic 24-lead surface mount package. The AT20­0107 is ideally suited for use where accuracy, fast speed,
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. Available with enhanced perform­ance as fully hermetic version. Environmentally screenable
as P/N AT-107.

Electrical Specifications2: TA = +25°C

CR-13

Parameter Test Conditions Frequency Units Min Typ. Max

Insertion Loss — DC - 2.0 GHz dB — 3.2 3.8

Attenuation Accuracy

VSWR Full Range DC - 2.0 GHz Ratio — — 1.8:1

Trise, Tfall

Ton, Toff

Transients

1 dB Compression 5 Input Power

Input IP3 5 Two Tone Inputs up to +5 dBm 50 MHz

Input IP2 5 Two Tone Inputs up to +5 dBm 50 MHz

Vcc

-Vee
Icc Vcc = 4.5 to 5.5V — mA — — 6.0

-Iee -Vee = -5.0 to -8.0V — mA — — 1.0

1. Above reference insertion loss.

2. All specifications apply when operated with bias voltages of +5V for VCC and –5.0 V to –8.0 V for VEE and 50O impedance at all
ports unless otherwise stated.

3. This attenuator is guaranteed monotonic.

4. For the attenuator to meet the guaranteed specifications, it is necessary to have a DC return on either RF1 or RF2. The DC
return can be either a 10KO resistor, or an RF choke.

5. VEE = -5 V for the typical numbers given.

3,4

Any Bit or Combination of Bits DC - 2.0 GHz dB — — +(.3 +7% of atten.)

10% to 90%

50% Control to 90%/10% RF

In-band (peak to peak)

Input Power

—
—

—
—
—

50 MHz

0.5 - 2.0 GHz

0.5 - 2.0 GHz

0.5 - 2.0 GHz
—

—

nS
nS

mV

dBm
dBm — —

dB
dB

dB
dB

V
V

—
—
—

—
—

—
—

4.5

-8.0

-(.2 +1% of atten.)

50

150

50

+21
+29

+35
+48

+75
+79

5.0
—

—
—
—

—
—

—
—

—
—

5.5

-5.0

Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 2.0 GHz

AT20-0107

V 4.00

Absolute Maximum Ratings 6

Parameter Absolute Maximum

Max. Input Power

0.05 GHz

0.5 - 2.0 GHz
+Vcc +5.5V

-Vee -8.5V

Control Voltage -0.5V to VCC +0.5V

Operating Temperature -40°C to +125°C

Storage Temperature -65°C to +150°C

6. Operation of this device above any one of these parameters

may cause permanent damange.

+27 dBm
+34 dBm

Functional Schematic (Top View)

Truth Table

C16 C8 C4 C2 C1 C0.5 Attenuation

0 0 0 0 0 0 Loss, Reference
0 0 0 0 0 1 0.5 dB
0 0 0 0 1 0 1.0 dB
0 0 0 1 0 0 2.0 dB
0 0 1 0 0 0 4.0 dB
0 1 0 0 0 0 8.0 dB
1 0 0 0 0 0 16.0 dB
1 1 1 1 1 1 31.5 dB

0 = TTL Low; 1 = TTL High

PCB Layout

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.

2