CHT4012-QDG datasheet(1/12 Pages) UMS

Part #	CHT4012-QDG

Description	DC-6GHz 6-BIT DIGITAL ATTENUATOR

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Manufacturer	UMS [United Monolithic Semiconductors]

Direct Link	http://www.ums-gaas.com

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CHT4012-QDG

RoHS COMPLIANT

Ref. : DSCHT4012-QDG1138 - 18 May 11

1/12

Specifications subject to change without notice

United Monolithic Semiconductors S.A.S.

Route Départementale 128 - BP46 - 91401 Orsay Cedex France

Tel.: +33 (0) 1 69 33 03 08 - Fax: +33 (0) 1 69 33 03 09

DC-6GHz 6-BIT DIGITAL ATTENUATOR

GaAs Monolithic Microwave IC in SMD leadless package

Description

The CHT4012-QDG is a DC-6GHz monolithic

6-bit digital attenuator with a LSB = 0.5dB

offering a high dynamic range and a high

accuracy,

the

RMS

amplitude

error

is

typically as low as 0.3dB. The circuit provides

low insertion loss 2.5dB associated to input

and output return losses better than 13dB. A

CMOS and TTL compatible interface is

available on chip.

It

is

designed

for

a

wide

range

of

applications, from military to commercial

communication systems.

The circuit is manufactured with a pHEMT

process, 0.25µm gate length, via holes

through

the

substrate,

air

bridges

and

electron beam gate lithography.

It is supplied in RoHS compliant SMD

package.

Main Features

■ Broadband performances: DC-6GHz

■ Insertion Loss (state 0): 2.5dB

■ RMS attenuation error: 0.3dB

■ RMS phase variation: 1deg

■ DC bias: V+=5V and V-=-5V

■ No decoupling capacitance on Input and

Output RF accesses

■ 24L-QFN4x4

■ MSL1

Main Characteristics

Tamb.= +25°C

Symbol

Parameter

Min

Typ

Max

Unit

Freq

Frequency range

DC

6

GHz

IL

Insertion Loss

2.5

dB

Rms_att_err

RMS of attenuation error

0.3

dB

Rms_phivar

RMS of phase variation (0.5 to 6GHz)

1

°

1

3

4

2

6

5

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

RFin

RFout

GND

-V

+V

A2

A3

A4

A5

A6

A1

A2

A3

A4

A5

A6

Control interface

A1

GND

1

3

4

2

6

5

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

RFin

RFout

GND

-V

+V

A2

A3

A4

A5

A6

A1

A2

A3

A4

A5

A6

Control interface

A1

A2

A3

A4

A5

A6

Control interface

A1

GND

1

3

4

2

6

5

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

RFin

RFout

GND

-V

+V

A2

A3

A4

A5

A6

A1

A2

A3

A4

A5

A6

Control interface

A1

A2

A3

A4

A5

A6

Control interface

A1

GND

1

3

4

2

6

5

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

RFin

RFout

GND

-V

+V

A2

A3

A4

A5

A6

A1

A2

A3

A4

A5

A6

Control interface

A1

A2

A3

A4

A5

A6

Control interface

A1

GND

UMS

T4012

YYWW

Frequency :

0.5GHz-6GHz

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