AT90-1283TR - Tyco Electronics - Datasheet.Directory

Digital Attenuator, 15.5 dB, 5-Bit,

TTL Driver, DC-3.5 GHz

AT90-1283

CSP-1

V 4.00

Electrical Specifications TA = +25°C

Parameter Test Conditions Frequency Units Min Typical Max

Insertion Loss — DC - 3.5 GHz dB — 2.8 3.2

Attenuation

Accuracy Individual Bits 0.5-1-4-8 dB

Individual Bit 2 dB

Any Combination of Bits

1 to 15.5 dB

DC - 3.5 GHz

—

±(.3 +5% of atten setting)

±(.4 +10% of atten setting)

±(.5 +7% of atten setting)

VSWR Full Range DC - 3.5 GHz Ratio — 1.6:1 1.8:1

Switching Speed 50% Cntl to 90%/10% RF

10% to 90% or 90% to 10% —

— nS

nS —

— 75

20 150

1 dB Compression —

— 50 MHz

0.5 - 3.5 GHz dBm

dBm —

— +21

+29 —

—

Input IP3 Two-tone inputs up to +5 dBm 50 MHz

0.5-3.5 GHz dB

dB —

— +35

+48 —

—

+Vcc — — V 4.75 5.0 5.25

Logic “0” Sink Current is 20 µA max. — V 0.0 — 0.8

Logic “1” Source Current is 20 µA max. — V 2.0 — 5.0

Icc Vcc min to max, Logic “0” or

“1” — mA — 6 10

Features

nAttenuation: 0.5 dB Steps to 15.5 dB

nSingle Positive Supply

nContains Internal DC to DC Converter

nLow DC Power Consumption

nSmall Footprint, JEDEC Package

nIntegral TTL Driver

n50 ohm Impedance

Description

M/A-COM's AT90-1283 is a GaAs FET 5-bit digital

attenuator with integral TTL driver. Step size is 0.5 dB

providing a 15.5 dB total attenuation range. This device is

in an FQFP-N plastic surface mount package. The AT90-

1283 is ideally suited for use where accuracy, fast speed,

very low power consumption and low costs are required.

Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz AT90-1283

Specifications subject to change without notice.

n North America: Tel. (800) 366-2266

n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298

n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020

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

V 4.00

Absolute Maximum Ratings 8

Parameter Absolute Maximum

Max. Input Power

0.05 GHz

0.5 - 3.5 GHz

+27 dBm

+34 dBm

+Vcc +5.5V

Logic Voltages 9 -0.5 to +Vcc + 0.5V

Operating Temperature -40°C to +85°C

Storage Temperature -65°C to +125°C

8. Operation of this device above any one of these

parameters may cause permanent damange.

9. Standard CMOS TTL interface, latch-up will occur if logic

signal is applied prior to power supply.

Recommended PCB Layout 7

Truth Table

0 = TTL Low; 1 = TTL High

Pin Configuration

Pin # Function Pin # Function

1 GND 17 NC

2 C8 18 NC

3 C4 19 +Vcc2

4 C2 20 NC

5 C1 21 Cp4

6 C0.5 22 NC

7 GND 23 Cp4

8 NC 24 NC

9 NC 25 -Vee3,5

10 NC1 26 GND

11 GND 27 RF2

12 RF1 28 GND

13 GND 29 NC1

14 NC 30 -Vee3,5

15 NC 31 NC

16 NC 32 +Vcc2,6

1. Pins 10 & 29 must be isolated

2. Pin 19 must be connected to Pin 32.

3. Pin 25 must be connected to Pin 30.

4. .01 µF cap must be between pins 21 & 23.

5. -Vee produced internally and requires a .1 µF cap to GND.

6. +Vcc requires a .1 µF cap to GND.

C8 C4 C2 C1 C0.5 Attenuation

0 0 0 0 0 Loss, Reference

0 0 0 0 1 0.5 dB

0 0 0 1 0 1.0 dB

0 0 1 0 0 2.0 dB

0 1 0 0 0 4.0 dB

1 0 0 0 0 8.0 dB

1 1 1 1 1 15.5 dB

7. Application Note C2083 is available on line at

www.macom.com

Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz AT90-1283

Specifications subject to change without notice.

n North America: Tel. (800) 366-2266

n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298

n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020

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

V 4.00

Typical Performance Curves

Attenuation Error, 1 dB Bit Attenuation Error, 0.5 dB Bit

Attenuation Error, 2 dB Bit Attenuation Error, 4 dB Bit

-1.0

-0.5

0.0

0.5

1.0

0 500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

Error (dB)

-1.0

-0.5

0.0

0.5

1.0

0500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

Error (dB)

-1.0

-0.5

0.0

0.5

1.0

0500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

Error (dB)

-0.5

0.0

0.5

1.0

0500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

Error (dB)

VSWR @ Insertion Loss Insertion Loss

1.0

1.5

2.0

2.5

3.0

0 500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

Loss (dB)

1.00

1.25

1.50

1.75

0500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

VSWR Ratio

Input Output

Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz AT90-1283

Specifications subject to change without notice.

n North America: Tel. (800) 366-2266

n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298

n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020

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

V 4.00

Typical Performance Curves

Attenuation Error, 8 dB Bit Attenuation Error, Max. Attenuation

-0.5

0.0

0.5

1.0

0 500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

Error (dB)

-1.0

0.0

1.0

2.0

3.0

0500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

Error (dB)

VSWR, 1 dB Bit VSWR, 0.5 dB Bit

VSWR, 2 dB Bit VSWR, 4 dB Bit

1.0

1.2

1.4

1.6

0 500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

VSWR Ratio

Input Output

1.0

1.2

1.4

1.6

0500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

VSWR Ratio

Input Output

1.0

1.2

1.4

1.6

1.8

0500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

VSWR Ratio

Input Output

1.0

1.2

1.4

1.6

0 500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

VSWR Ratio

Input Output

Digital Attenuator, 15.5 dB, 5-Bit, TTL Driver, DC - 3.5 GHz AT90-1283

Specifications subject to change without notice.

n North America: Tel. (800) 366-2266

n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298

n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020

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

V 4.00

Typical Performance Curves

Ordering Information

Part Number Package

AT90-1283 Bulk Packaging

AT90-1283TR Tape and Reel (1K Reel)

AT90-1283-TB Units Mounted on Test Board

VSWR, 8 dB Bit VSWR, Maximum Attenuation

1.0

1.2

1.4

1.6

0500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

VSWR Ratio

Input Output

1.0

1.2

1.4

1.6

1.8

0500 1000 1500 2000 2500 3000 3500

Frequency (MHz)

VSWR Ratio

Input Output