Specifications and information are subject to change without notice

WJ Communications, Inc

• Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • Web site: www.wj.com

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January 2007

VG111

PCS/UMTS-band Variable Gain Amplifier

Product Features

attenuation range

Applications

mobile infrastructure

Product Description

The VG111 is a PCS / UMTS-band high dynamic range

variable gain amplifier (VGA) packaged in a low profile Pb-

free / RoHS-compliant surface-mount leadless package that

measures 6 x 6 mm square.

The +22 dBm output compression point and +39.5 dBm

output intercept point of the amplifier are maintained over

the entire attenuation range, making the VG111 ideal for

use in transmitter and receiver AGC circuits and as a

variable gain stage following an LNA in high dynamic

range receiver front ends.

Superior thermal design allows the product to have a

minimum MTTF rating of 1000 years at a mounting

temperature of +85º C. All devices are 100% RF & DC

tested and packaged on tape and reel for automated surface-

mount assembly.

Functional Diagram

Specifications

(1)

Parameter

Units

Min

Typ

Max

Conditions

Operational Bandwidth

MHz

1700

2200

Test Frequency

MHz

1900

See note 1

Gain at min. attenuation

dB

12

14

Input Return Loss

dB

12

Output Return Loss

dB

11

Output P1dB

dBm

+22

Output IP3

dBm

+37

+39.5

See note 2

Noise Figure at min. attenuation

dB

4.3

Test Frequency

MHz

2140

See note 1

Gain at min. attenuation

dB

13.3

Input Return Loss

dB

14

Output Return Loss

dB

14

Output P1dB

dBm

+22

Output IP3

dBm

+39.5

See note 2

Noise Figure at min. attenuation

dB

4.5

Gain Variation Range

dB

23.5

26.6

32.5

See note 3

V

0

4.5

See note 1

Group Delay

ns

0.6

Supply Voltage

V

+5

Operating Amplifier Current Range

mA

120

150

180

Pin 25

Gain Control Pin Current

mA

20

1. Test conditions unless otherwise noted: 25ºC, Vdd = +5 V in a tuned application circuit. Vctrl is the control voltage through a BJT transistor and a 100

Ω dropping resistor as shown in the same application circuit.

2. 3OIP measured with two tones at an output power of +5 dBm/tone separated by 10 MHz. The suppression on the largest IM3 product is used to calculate the 3OIP using a 2:1 rule.

3. The gain variation range is measured as the difference in gain with Vctrl = 0V and Vctrl = 4.5V at 1.9 GHz.

Absolute Maximum Rating

Parameter

Rating

Operating Case Temperature

-40 to +85

°C

Storage Temperature

-55 to +125

°C

Amplifier Supply Voltage (pin 25)

+6 V

Pin 5 (Gain Control) Current

30 mA

RF Input Power (continuous)

+12 dBm

Junction Temperature

+220

° C

Operation of this device above any of these parameters may cause permanent damage.

Ordering Information

Part No.

Description

VG111-F

PCS/UMTS-band Variable Gain Amplifier

(lead-free/RoHS-compliant QFN package)

VG111-PCB1900

1.8 – 2.0 GHz Fully Assembled Application Board

VG111-PCB2100

2.0 – 2.2 GHz Fully Assembled Application Board

8

9

10

11

12

13

14

28

27

26

25

24

23

22

7

6

5

4

3

2

1

15

16

17

18

19

20

21

GND

GND

GND

RF OUT

GND

GND

GND

GND

GND

GND

RF IN

GND

GND

GND

Variable

Attenuator

Amp