Datasheet AM55-0004TR, AM55-0004SMB, AM55-0004RTR, AM55-0004 Datasheet (MACOM)

Preliminary Specifications

250 m W Linea r Po wer Amplifier and T /R Switch

1.8 - 2.0 GHz

Features

●

Operates Over Full PCN/PCS/PHS Bands

●

Operates Over +3 V to +5 V Supply Voltage

●

+24 dBm P

●

35% PAE @ P

●

On-Chip T/R Switch, Linear Operation to +30 dBm

●

Low Cost SSOP-28 Plastic Package

Description

M/A-COM’s AM55-0004 power amplifier/switch integrates a
power amplifier and transmit/receive switch in a low cost
SSOP package. The power amplifier delivers +24 dBm of
linear power with high efficiency and can be operated at
supply voltages as low as 2.7 V. It is ideally suited for
QPSK or other linearly modulated systems in the 1.8 to 2.0
GHz frequency band.

The power amplifier/switch is fully monolithic and requires
only one output capacitor for power match. The T/R switch
achieves good insertion loss and isolation without degrading
the overall linearity.

The AM55-0004 is ideally suited for final stage power
amplification in linear TDD systems. The integrated switch is
convenient for duplexing. The AM55-0004 can also be used
as a driver stage for high power systems. Typical applications
include Japanese PHS systems or PCN/PCS transmit chains.

M/A-COM’s AM55-0004 is fabricated using a mature

0.5-micron gate length GaAs process. The process features
full passivation for increased performance and reliability.

Typical at PA Out

1dB

for Linear Operation

1dB

AM55-0004

SSOP-28

+.0037

.3900

-.0041

+.0025

.0275

-.0025

+0,06

0,7

-0,06

PIN 1

.057 ±.003
1,45±0,08

.007 ±.003
0,18±0,08

.025

0,64

Dimensions are inches over millimeters.

Ordering Information

Part Number Description

AM55-0004 SSOP 28-Lead Plastic Package
AM55-0004TR Forward Tape & Reel*
AM55-0004RTR Reverse Tape & Reel*
AM55-0004SMB Designer’s Kit

If specific reel size is required, consult factory for part

*

number assignment.

9,91

+0,09

-0,1

+.004

.010

-.001
+0,1

0,25

-0,03

.004 (0,10)

+.0034

.1540

-.0043
+0,09

3,91

-0,11

.015 (0,38) X 45°

.236±.008

5,99±0,2

.0080

.028

0,71

0,2

0-8°

+.022

-.013

+0,56

+.0018

-.0005
+0,05

-0,01

-0,33

Typical Electrical Specifications

Test conditions: Frequency: 1.9 GHz, V
VG2adjusted for 65 mA quiescent bias on V

Parameter Units Min. Typ. Max.

Power Amplifier

Linear Gain dB 22 24
Power Output @ P
Current From Positive Supply @ P
Input VSWR 2.0:1

T/R Switch

Insertion Loss dB 0.6 1.0
Input Match 1.5:1
Isolation dB 15 20

Specifications Subject to Change Without Notice V2.00

M/A-COM Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA ■ Telephone: [phone]

at PA OUT port dBm 22.5 24

1dB

1dB

DD1

= V

DD2

, TA= +25°C

DD2

= 4.8 V ±10%, VG1adjusted for 30 mA quiescent bias on V

mA 75 175 275

DD1

,

1

250 mW Linear Power Amplifier and T/R Switch AM55-0004

Absolute Maximum Ratings

1

Parameter Absolute Maximum

Max. Input Power
Operating Voltages

2

2

+23 dBm
VDD= 7 V
V

= -5 V

GG

V

- VGG= 8 V

DD

Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C

1. Exceeding these limits may cause permanent damage.

2. Ambient temperature (TA) = +25°C

Pin Configuration

Pin No. Pin Name Description

1 GND DC and RF Ground
2 VSW Complimentary T/R Switch Control,

3 GND DC and RF Ground
4 Tx IN Transmit side of T/R switch
5 GND DC and RF Ground
6 GND DC and RF Ground

7 ANT IN/OUT Common port of T/R switch which

8 GND DC and RF Ground

9 Rx OUT Receive side of T/R switch
10 GND DC and RF Ground
11 GND DC and RF Ground
12 V

13 SAVE Tx Sleep mode control of first stage of

14 GND DC and RF Ground
15 GND DC and RF Ground
16 PA IN RF input of the Power Amplifier
17 GND DC and RF Ground

18 V

19 GND DC and RF Ground
20 V

21 GND Second Stage DC and RF Ground
22 GND Second Stage DC and RF Ground
23 GND Second Stage DC and RF Ground
24 GND Second Stage DC and RF Ground
25 PA OUT RF output of the Power Amplifier

26 V

27 VSW T/R Switch Control, 0 V Tx mode/-4 V

28 GND DC and RF Ground

DD

G1

G2

DD2

1

-4 V Tx mode/0 V Rx mode

is connected to the antenna

Positive bias for the first stage of
PA, +2.7 to +6.0 volts

PA ONLY
0 V — first PA stage on

-4 V — first PA stage off

Negative bias control for the first PA
stage, voltage divider is on the MMIC,
adjusted to set V
current, which is typically 30 mA.

Input impedance: 10 kΩ

Negative bias control for the second
PA stage, adjusted to set V
quiescent bias current, which is
typically 65 mA.

Input impedance: > 1MΩ

Positive bias for the second stage of
the PA, +2.7 to +6.0 volts

Rx mode

quiescent bias

DD1

DD2

T ruth Table

Operating Mode VSW VSW SAVE Tx

PA Tx X X 0 V
PA Sleep X X -4.0 Volts
T/R Switch Tx 0 Volts -4.0 Volts X
T/R Switch Rx -4.0 Volts 0 Volts X

X - Don’t Care

Functional Diagram and Pin Configuration

GND
VSW

GND

Tx IN

GND

GND

ANT IN/OUT

GND

Rx OUT

GND
GND
V

DD1

SAVE Tx

GND

1

14 15

28

GND

VSW

V

V

DD2

DD1

PA OUT
GND

GND

GND

GND

V

V

G2

G1

GND

V

V

G1

G2

GND
PA IN

GND

Specifications Subject to Change Without Notice V 2.00

M/A-COM Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA ■ Telephone: [phone]

2

250 mW Linear Power Amplifier and T/R Switch AM55-0004

Po wer Amplifier Small Signal Performance

GAIN

27

6.0 V

24

21

6.0 V

3.6 V

3.0 V

4.8 V

GAIN (dB)

18

15

1.50 1.75 2.00 2.25 2.50
FREQUENCY (GHz)

INPUT MATCH

0

-5

-10

-15

-20

RETURN LOSS (dB)

-25

1.50 1.75 2.00 2.25 2.50

3.0 V

3.6 V

FREQUENCY (GHz)

4.8 V

1

Po wer Amplifier CWP erf ormance at1.9 GHz

POWER OUTPUT

28
26
24
22

POWER (dBm)

20
18

-5 -3 -1 1 3
P

(dBm)

IN

POWER ADDED EFFICIENCY (%)

45

35

3.6 V

25

PAE (%)

15

5

-5 -3 -1 1 3

3.0 V

P

(dBm)

IN

6.0 V

4.8 V

3.0 V

6.0 V

1

3.6 V

4.8 V

OUTPUT MATCH

0

-5

-10

-15

-20

RETURN LOSS (dB)

-25

1. All data measured at TA= +25°C and VG1, VG2adjusted for first stage quiescent current of 30 mA and second stage current of 65 mA,
respectively.

Specifications Subject to Change Without Notice V 2.00

6.0 V

4.8 V

3.0 V

3.6 V

1.50 1.75 2.00 2.25 2.50
FREQUENCY (GHz)

GAIN COMPRESSION

0

-1

-2

-3

-4

COMPRESSION (dB)

-5

-5 -3 -1 1 3

6.0 V

P

IN

4.8 V

3.0 V

3.6 V

(dBm)

M/A-COM Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA ■ Telephone: [phone]

3

250 mW Linear Power Amplifier and T/R Switch AM55-0004

Power Amplifier Temperature Performance

LINEAR GAIN, V

27

24

21

GAIN (dB)

18

15

1.50 1.75 2.00 2.25 2.50

POWER OUTPUT @ 1.9 GHz, V

28
26
24
22

POWER (dBm)

20

-15°C

= V

DD2

= 4.8 V

+70°C

DD1

+25°C

+70°C

DD1

FREQUENCY (GHz)

= V

-15°C

DD2

+25°C

= 4.8 V

1

Po wer Amplifier Spurious Response at
Various Supply Voltages

THIRD ORDER INTERMODULATION RATIO @ 1.9 GHz
(TONE SPACING 600 KHz)

30

25

20

IMR (dBc)

15

10

15 17 19 21 23 25

60

50

40

dBc

30

3.0 V

FUNDAMENTAL P

2ND HARMONIC RATIO @ 1.9 GHz

3.0 V

1

/TONE (dBm)

OUT

6.0 V

4.8 V

3.6 V

4.8 V

4.0 V

18

-5 -3 -1 1 3
PIN(dBm)

POWER ADDED EFFICIENCY (%) @ 1.9 GHz,

= V

V

DD1

40
35
30
25

PAE (%)

20
15
10

-5 -3 -1 1 3

1. All data measured at TA= +25°C and VG1, VG2adjusted for first stage quiescent current of 30 mA and second stage current of 65 mA, respectively.

DD2

= 4.8 V

-15°C

+25°C

+70°C

P

(dBm)

IN

20

10 13 16 19 22 25

FUNDAMENTAL P

3RD HARMONIC RATIO @ 1.9 GHz

80
75
70
65

dBc

60
55
50

10 13 16 19 22 25

FUNDAMENTAL P

4.0 V

OUT

OUT

3.0 V

(dBm)

(dBm)

4.8 V

Specifications Subject to Change Without Notice V 2.00

M/A-COM Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA ■ Telephone: [phone]

4

250 mW Linear Power Amplifier and T/R Switch AM55-0004

Power Amplifier Spectral Response Under
Modulation Drive

(π/4 DQPSK, a = 0.5, 384 kB/sec, 9-bit PN code)

SPECTRAL RESPONSE UNDER MODULATION
(VD= 3.0 V, P

0

-20

-40

-60

DENSITY (dBc)

POWER SPECTRAL

-80

1899.0 1899.4 1899.8 1900.2 1900.6 1901.0

SPECTRAL RESPONSE UNDER MODULATION
(VD= 4.8 V, P

0

-10

-20

-30

-40

-50

DENSITY (dBc)

-60

POWER SPECTRAL

-70

1899.0 1899.4 1899.8 1900.2 1900.6 1901.0

= 20.5 dBm)

OUT

FREQUENCY (MHz)

= 23.4 dBm)

OUT

FREQUENCY (MHz)

1

1

Transmit/Receive Switch Performance

INSERTION LOSS

0.0

-0.5

-1.0

LOSS (dB)

-1.5

-2.0

1.50 1.75 2.00 2.25 2.50

ISOLATION (@ -15°C, +25°C and +70°C)

-20

-25

-30

-35

ISOLATION (dB)

-40

1.50 1.75 2.00 2.25 2.50

+70°C

FREQUENCY (GHz)

FREQUENCY (GHz)

-15°C

+25°C

RETURN LOSS (@ -15°C, +25°C and+70°C)

0

Output Power Under Modulation

VD(volts) P

OUT

(dBm)

2

3 20.5

3.6 21.4
4 22.2

4.8 23.4
6 23.7

1. Spectral output is tested under the following conditions:

Modulation scheme is π/4 DQPSK with a bit transfer rate
of 384 kB/sec and a root Nyquist filter with a = 0.5 per
RCR STD-28. The spectrum analyzer settings are as follows:

Resolution bandwidth: 10 kHz
Video bandwidth: 100 kHz
Sweep time: 5 seconds

2. This chart documents the modulated output power delivered
for a fixed adjacent channel interference (ACI) rejection of 55
dBc at a 600-kHz offset.

Specifications Subject to Change Without Notice V 2.00

-5

-10

-15

-20

-25

-30

RETURN LOSS (dB)

-35

1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5

FREQUENCY (GHz)

LINEARITY (Tx MODE)

33
31
29
27
25

POWER OUT (dBm)

23

25 26 27 28 29 30 31 32 33 34

POWER IN (dBm)

In

Out

2.5

1.5

0.5

-0.5

-1.5

-2.5

M/A-COM Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA ■ Telephone: [phone]

5

COMPRESSION (dB)

250 mW Linear Power Amplifier and T/R Switch AM55-0004

Recommended PCB Configuration

Layout View

0.700 in.

0.490 in.

C8

C5

Pin 1

C4

C1

C10

C3

R3

C6

C2

C7

C9

R2

External Circuitry Parts List

Label Value Purpose

C1 - C5 1000 pF Low frequency bypass
C6 - C8 68 pF RF bypass
C9 1.5 pF Output power tuning
C10 15 pF Reduces low frequency gain
R1 2.7 k Ω Voltage divider to V
R2 1.5 k Ω Voltage divider to V

R3

150 Ω Reduces low frequency gain

Tline 0.250 in. long Power match

G2
G2

R1

Cross-Section View

RF Traces + Components

RF Ground
DC Routing
Customer Defined

The PCB dielectric between RF traces and RF ground layers
should be chosen to reduce RF discontinuities between
50-Ω lines and package pins. M/A-COM recommends an
FR-4 dielectric thickness of 0.008 in. (0.2 mm), yielding a
50-Ω line width of 0.015 in. (0.38 mm). The recommended
metalization thickness is 1 oz. copper.

Shaded traces are vias to DC routing layer and traces on DC
routing layer.

Biasing Procedure

The AM55-0004 requires that V
any V
procedure is not followed. All FETs in the PA will draw

bias. Permanent damage may occur if this

DD

excessive current and damage internal circuitry.

bias be applied prior to

GG

All off-chip components are low-cost surface mount components obtainable from
multiple sources. (0.020 in. x 0.040 in. or 0.030 in. x 0.050 in.)

External Circuitry

VSW

V

1

VSW

Tx IN

ANT IN/OUT

Rx OUT

V

DD1

Save Tx

Specifications Subject to Change Without Notice V 2.00

C8

C5

C4

2
3

4
5
6

7
8
9

10
11

12
13
14

28
27

26
25

24
23

22
21
20

19
18

17
16
15

C10

R3

TLine

C1 C6

C9

C2

C3 C7

R1

R2

DD2

PA OUT

V

G2

V

G1

PA IN

M/A-COM Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA ■ Telephone: [phone]

6

250 mW Linear Power Amplifier and T/R Switch AM55-0004

Designer’ s Kit (AM55-0004SMB)

The AM55-0004SMB Designer's Kit allows for immediate evaluation of M/A-COM's AM55-0004 integrated Power Amplifier
and T/R Switch. The evaluation board consists of an AM55-0004, recommended external surface mount circuitry, RF
connectors and a DC multipin connector, all mounted to a multi-layer FR-4 PCB. Other items included in the Designer's Kit:
a floppy disk (with typical performance data and a .DXF file of the recommended PCB layout) and any additional
Application Notes. The AM55-0004SMB PA/Switch evaluation PCB and block diagram are illustrated below with all
functional ports labeled.

P/A Switch Sample Board

VDD1

TX IN

ANT IN/OUT

RX OUT

SAVE T

VSW

VSW

DC Connector Pinout

VG1

VG2

PA IN

VDD2

PA OUT

Functional Block Diagram

Tx IN

ANT IN/OUT

Rx OUT PA IN

PA OUT

PCB DC

Connector Number Connector Number

Function

Device Pin PCB DC

Function

Device Pin

1 N/C N/C 11 VSW 27
2V

(+ 4.8 V) 12 12 V

DD1

G1

18
3 SAVE Tx (0 V/-4 V) 13 13 VSW 27
4 GND N/C 14 GND N/C
5 SAVE Tx (0 V/-4 V) 13 15 V
6V

7

G1

VSW

18 16 V

2 17 N/C N/C

8 GND N/C 18 V
9

10 V

Specifications Subject to Change Without Notice V 2.00

VSW

G1

2 19 N/C N/C

18 20 V

G2
G1

G2

( + 4.8 V) 26

DD2

20

18

20

M/A-COM Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA ■ Telephone: [phone]

7

250 mW Linear Power Amplifier and T/R Switch AM55-0004

AM55-0004SMB Biasing Procedure

In order to prevent transients which may damage the MMIC, please adhere to the following procedure.

• Turn on all power supplies and set all voltages to 0 volts BEFORE connecting the power supplies to the
DC connector.

• Apply -4.0 volt supply or GND to DC connector pin 9 (VSW, see truth table for desired mode).

• Apply -4.0 volt supply or GND to DC connector pin 13 (VSW, see truth table for desired mode).

• Apply a -4.0 volt supply to the DC connector pin 16 (VG1).

• Apply a -4.0 volt supply to the DC connector pin 18 (VG2).

• Apply a +4.8 volt supply to the DC connector pin 2 (V

• Apply a +4.8 volt supply to the DC connector pin 20 (V

• Apply GND to DC connector pin 5 (Save Tx).

• Adjust VG1supply for desired V

• Adjust VG2supply for desired V

quiescent current (typically 30 mA).

DD1

quiescent current (typically 65 mA).

DD2

• Change voltage on DC connector pin 5 as required (Save Tx, see truth table for desired mode).

• Apply RF power and test.

• To power off, reverse above procedure

1. Set VG1& VG2to -4 V.

2. Set V

DD1

& V

DD2

to 0 V.

3. Set control voltage supplies to 0 V.

4. Disconnect bias lines from DC connector.

5. Turn off power supplies.

DD1

DD2

).

).

Evaluation PCB and RF Connector Losses

Port Reference Estimated Loss (dB)

PA IN 0.15

PA OUT 0.20

Tx IN 0.20

ANT IN/OUT 0.20

Rx OUT 0.20

The DC connector on the Designer’s Kit PCB allows selection of all the device’s operating modes.
It is accomplished by one or more of the following methods:

1. A mating female multi-pin connector (Newark Electronics
Stock # 46F-4658, not included)

2. Wires soldered to the necessary pins (not included)

3. Clip leads (not included)

4. A combination of clip leads or wires and jumpers
(jumpers included as required)

Specifications Subject to Change Without Notice V 2.00

M/A-COM Inc. ■ 1011 Pawtucket Boulevard, Lowell, MA 01853 USA ■ Telephone: [phone]

8