RTPA5250-130 Просмотр технического описания (PDF) - Raytheon Company

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производитель

RTPA5250-130

3.3V UNII Band Power Amplifier MMIC/Switch Module for WLAN

Raytheon Company 

Generation of

Negative Voltages

(cont’d)

RTPA5250-130

3.3V UNII Band Power Amplifier

MMIC/Switch Module for WLAN

PRODUCT INFORMATION

To supply the negative supply current drawn by the RTPA5250 the most negative voltage should be limited to

–5.5V . Note that the limitation is in the charge pump circuitry not the RTPA5250-130. The equation for the output

of the Maxim 868 in terms of the input Vdd is: Vout=(R1÷R2)xVdd

In our example Vdd=3.3V and R1=169k, R2=100k. A bill of materials with suggested components is shown in

Figure 9.

Figure 9

Materials List

QTY Item No.

11

42

53

14

1 5 (R1)

2 6 (C1, 2)

1 7 (U1)

1 8 (C3)

1 9 (C4)

1 10 (R2)

Part No.

G657176-1

J1, J2

P1 or P2

G656998-1

311-169KHGT-ND

GRM39C0G224J16

ref#GRM37X7R224K16

MAXB68

GRM39C0G224J16

ref# GRM37X7R224K16

TPSB106K016R06000

311-100HTR-ND

Description

PC. Board

SMA Connector

Terminals

RTPA5250 Substrate

169K Res. (.06 x .03)

0.220 µF Capacitor (.06 x .03)

Charge Pump

1 µF Capacitor (.06 x .03)

10 µF Capacitor (.12 x .08)

100K Res. (.06 x .03)

Vendor

Raytheon

Johnson

SAMTEC

Raytheon

Digi-Key

Murata

Maxim

Murata

AVX

Digi-Key

(For additional details see the Maxim MAX868 data sheet at www.maxim-ic.com)

www.raytheonrf.com

Characteristic performance data and specifications are subject to change without notice.

Revised January 25, 2002

Page 8

Raytheon RF Components

362 Lowell Street

Andover, MA 01810

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