ZABG6003

Document number: DS38916 Rev. 1 - 2

2 of 8

www.diodes.com

December 2016

© Diodes Incorporated

ZABG6003

Device Description

The ZABG series of devices are designed to meet the bias requirements of GaAs and HEMT FETs commonly used in satellite receiver LNBs with

a minimum of external components whilst operating from a minimal voltage supply and using minimal current.

The ZABG6003 has six FET bias stages. To optimize the system for noise and gain the drain current for two of the six stages can be programmed

Drain current of the remaining four FETS D2, D3, D5 and D6 are internally set to 10mA.

Depletion mode FETs require a negative voltage bias supply when operated in grounded source circuits. The ZABG6003 includes an integrated

switched capacitor DC-DC converter generating a regulated output of -2V to allow single supply operation. The ZABG6003 has been designed to

It is possible to use less than the full complement of FET bias controls, unused drain and gate connections can be left open circuit without

affecting operation of the remaining bias circuits.

To protect the external FETs the circuits have been designed to ensure that, under any conditions including power up/down transients, the gate

drive from the bias circuits cannot exceed -2.5V. Additionally each stage has its own individual current limiter. Furthermore if the negative rail

experiences a fault condition, such as overload or short circuit, the drain supply to the FETs will be limited, avoiding excessive current flow.

The ZABG6003 is available in the U-QFN3030-16 (Type B) package.

Device operating temperature is -40°C to +105°C to suit a wide range of environmental conditions.

Pin Assignments and Descriptions

(Top View)

D2

G2

D3

G3

G4

D5

G5

D6

D4

D1

G1

G6

Gnd

16

15

14

13

12

11

10

9

8

7

6

5

1

2

3

4

U-QFN3030-16 (Type B)

Pin Number

Pin Name

Description

1

D2

Drain GaAs FET 2

2

G2

Gate GaAs FET 2

3

D3

Drain GaAs FET 3

4

G3

Gate GaAs FET 3

5

Gnd

Ground

6

Negative rail reservoir capacitor

7

Drain current setting for D1 and D4

8

G6

Gate GaAs FET 6

9

D6

Drain GaAs FET 6

10

G5

Gate GaAs FET 5

11

D5

Drain GaAs FET 5

12

G4

Gate GaAs FET 4

13

D4

Drain GaAs FET 4

14

Supply voltage

15

D1

Drain GaAs FET 1

16

G1

Gate GaAs FET 1

Pad

Gnd

Must be connected to Ground or No Connection