Datasheet RF106 Datasheet (Conexant)

RF106 900 MHz Power Amplifier

Product Description

The RF106 is a class AB RF power amplifier for 900 MHz
ISM band applications. It delivers output power
proportional to the input signal power.

The RF106 power amplifier, combined with Conexant's
RF105 diSSTance™ (digital Spread Spectrum
Technology) transceiver, forms a complete system
solution for a direct conversion 900 MHz diSSTance radio
which is fully compliant with FCC Part 15 regulations in
the ISM band.

The RF106 is operational in the 900 MHz ISM band with
supply voltage ranging from 2.7V to 5V. It is available in a
small 20-pin TSSOP package, shown in Figure 1. Figure 2
shows a block diagram for the RF106.

RFOUT

GND1

MATCH

VCC1

NC

VCC2

NC

VCC3

GND2

ENABLE

1
2
3
4
5
6
7
8
9
10

RF106

Features

• Class AB-type RF power amplifier

• 100 mW peak envelope output power

• Very fast settling from standby mode to active

mode

• Efficient high output power operation

• Very few external components required

• 20-pin TSSOP package

Applications

• diSSTance-technology cordless telephone

•

Direct s

• Frequency hopping spread spectrum systems

• Wireless LANs

• Wireless modems

• Wireless security

• Inventory control

20
19
18
17
16
15
14
13
12
11

equence spread spectrum systems

systems

GND9
GND8
GND7
GND6
NC
NC
GND5
GND4
GND3
RFIN

Figure 1. RF106 Pin Signals – 20 Pin TSSOP

RFOUTRFIN

ENABLE

A1 A2 A3

Bias

Figure 2. RF106 Block Diagram

Data Sheet 2/1/99 Order No. W118

RF106 900 MHz Power Amplifier

Technical Description

The RF106 is a three stage, class AB RF power amplifier
for the 902-928 MHz ISM band. A class AB power
amplifier allows a wide range of output powers without
excessive idle power dissipation. Figure 3 shows a typical
application circuit for the RF106.

Recommendations on Layout and Implementation

Matching

An input matching network and an output matching
network are needed for maximum power transfer. For
greatest efficiency, it is recommended that the input
matching network be determined before the output
matching network. Matching network values are layout­sensitive. If the RF106 is used with Conexant's RF105
transceiver, the input matching network is not required if
the connecting traces are short.

A bypassing capacitor of 33pF and a decoupling capacitor
of 1nF for low frequency noise are recommended. Due to
layout variations the value of the capacitor may vary.

General Grounding Requirements

All ground pins should have minimum trace inductance to
ground. If a ground plane cannot be provided right at the
pins, the vias to ground plane should be placed as close
to the pins as possible. There should be one via for each
ground pin, unless otherwise specified. If the ground
plane is at the bottom layer, two vias per pin in parallel
may be required.

It is important to provide pins 13 and 14 with separate
low-impedance connections to GND, isolated from other
top-layer grounds.

NC pins are not used and should be connected to ac
ground, Vcc or ground, as shown in Figure 3.

Bypassing

All VCC pins should have proper bypassing. These
decoupling capacitors should be placed very close to the
pins, preferably right at the Vcc pins.

Vcc

33pF

Output
matching
network*

1.5nH

Rx

section

90°
phase
shifter

Matching
network*

33pF

470

ENABLE

10k

Vcc

Vcc

Vcc

1nF

LPF

33pF

Ω

Ω

10

1nF

10

1nF

10

1nF

33pF

Ω

33pF

Ω

33pF

22nH

ESD Sensitivity

The RF106 is a static-sensitive electronic device. Do not
operate or store near strong electrostatic fields. Take
proper Electrostatic Discharge (ESD) precautions.

1

2

3

4

5

RF106

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

33pF

* Matching network values are layout-dependent.

Input

matching

network*

RFIN

Figure 3. RF106 Typical Application Circuit

2

Conexant

W118

2/1/98

RF106 900 MHz Power Amplifier

Interface Description

Table 1 describes the pin signals for the RF106.

Table 1. Pin Signal Description

Pin No. Name Description

1 RFOUT Power amplifier output

Connect to power supply through an inductor; matching network required before connecting to antenna.
2 GND1 Ground
3 MATCH Interstage matching

Connect to ground through a 1.5 nH (typical) inductor.
4 VCC1 Power supply
5 NC Not used

Connect to ac ground, Vcc or ground (Figure 3).
6 VCC2 Power supply

Internally connected to middle stage matching network.
7 NC Not used

Connect to ac ground, Vcc or ground (Figure 3).
8 VCC3 Power supply
9 GND2 Ground

10 ENABLE Chip enable (active high)
11 RFIN Power amplifier input
12 GND3 Ground
13 GND4 Ground
14 GND5 Ground
15 NC Not used

Connect to ac ground, Vcc or ground (Figure 3).

16 NC Not used

Connect to ac ground, Vcc or ground (Figure 3).

17 GND6 Ground
18 GND7 Ground
19 GND8 Ground
20 GND9 Ground

W118
2/1/99

Conexant

3

RF106 900 MHz Power Amplifier

Specifications

Table 2 lists the absolute maximum ratings for the RF106.
Table 3 gives the electrical specifications for the RF106.

Table 2. Absolute Maximum Ratings

Parameter Min. Max. Unit

Supply voltage (Vcc)
Input voltage range
Power dissipation @ high output power mode 400 mW
Ambient operating temperature –10 +70 °C
Storage temperature –40 +125 °C

Notes:

1. Voltages are referenced to GND.

(note 1)

(note 1)

+5 V

GND VCC V

Table 3. RF106 Electrical Specifications

(note 1)

Parameter Min. Typ. Max. Units

Gain variation vs. frequency (902–928 MHz)
Peak-Envelope output Power (PEP)
RF gain 26 29 30 dB
Total supply current: Output PEP = 21 dBm

IM3: PEP ≤ 21 dBm –21 –17 dBc
Output VSWR for unconditional stability 10:1
RF input return loss (902–928 MHz) –9.5 dB
RF output-to-input isolation @ 915 MHz 50 dB
RF input impedance 50
RFOUT passband 3dB BW around 915 MHz 250 MHz
VIH for ENABLE 1.9 V
VIL for ENABLE 0.8 V
IIH for ENABLE 50 60
IIL for ENABLE –10 –1 0
Power supply for specified performance 3.0 3.6 5.0 V
Power supply range 2.7 3.6 5.0 V
Operating temperature range –10 25 70

Notes:

1. Test conditions: T

2. With continuous wave RF input signal of –8 dBm.

3. With continuous wave RF input signal of –18 dBm.

4. With continuous wave RF input signal of –28 dBm.

5. When ENABLE (pin 10) is low.

= 25 °C, VCC = 3.3V, f

A

(note 2)

Output PEP = 11 dBm
Output PEP = 1 dBm
Standby

(note 5)

REF

= 915 MHz

18 21 22 dBm

±

0.15

95
40
30

< 1

(note 2)
(note 3)
(note 4)

±

0.75 dB

mA
mA
mA

µ

Ω

µ
µ

°

A

A
A

C

4

Conexant

W118

2/1/98

RF106 900 MHz Power Amplifier

Device Dimensions

Package dimensions for the RF106 are given in Figure 4.

D

E1

E

PIN 1 REF

e b

TOP VIEW

A2

A

A1

DETAIL A

See detail A

E1

SIDE VIEW

Millimeters

Dim.

A 1.20 MAX 0.0473 MAX
A1 0.05 0.10 0.0020 0.0039

A2 0.90 NOM 0.0354 NOM
D 6.45 6.55 0.2540 0.2580
E 6.30 6.50 0.2481 0.2560
E1 4.30 4.50 0.1694 0.1772
L 0.50 0.75 0.0197 0.0295
L1 1.00 REF 0.0394 REF
e 0.65 BSC 0.0256 BSC
b 0.17 0.27 0.0067 0.0106
c 0.13 0.20 0.0051 0.0079
Coplanarity 0.08 MAX 0.003 MAX
Ref: 20-PIN TSSOP (GP00-D296)

c

L

L1

*Metric values (millimeters) should be used for PCB
layout. English values (inches) are converted from
metric values and may contain round-off errors.

Min. Max. Min. Max.

Inches*

Figure 4. Package Dimensions – 20-pin TSSOP

Information provided by Conexant Systems, Inc. is believed to be accurate and reliable. However, no responsibility is
assumed by Conexant for its use, nor any infringement of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent rights of Conexant other than for circuitry embodied in
Conexant products. Conexant reserves the right to change circuitry at any time without notice. This document is subject to
change without notice.

Conexant, “What’s Next in Communications Technologies” and diSSTance are trademarks of Conexant Systems, Inc.
Product names or services listed in this publication are for identification purposes only, and may be trademarks or registered

trademarks of their respective companies. All other marks mentioned herein are the property of their respective holders.
©1999, Conexant Systems, Inc.

Printed in U.S.A.
All Rights Reserved

W118

Conexant

5

2/1/99

Further Information:

[e-mail]
1-800-854-8099 (North America)
33-14-906-3980 (International)

Web Site

www.conexant.com

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