Philips CGY2021G Datasheet

INTEGRATED CIRCUITS

DATA SH EET

CGY2021G

DCS/PCS 2 W power amplifier

Preliminary specification
Supersedes data of 1996 Oct 15
File under Integrated Circuits, IC17

1997 Apr 03

Philips Semiconductors Preliminary specification

DCS/PCS 2 W power amplifier CGY2021G

FEATURES

• Power Amplifier (PA) overall efficiency 50% (DCS)

• 34 dB gain

• 0 dBm input power

• Gain control range >50 dB

• Integrated power sensor driver

• Low output noise floor of PA <−121 dBm/Hz in

DCS/PCS RX band

• Wide operating temperature range −20 to +85 °C

• LQFP 48-pin package

• Compatible with power ramping controller PCA5077 and

GaAs PA power modulator UBA1710.

APPLICATIONS

• Hand-held transceivers for DCS/PCS applications
(DCS: 1710 to 1785 MHz and PCS:
1850 to 1910 MHz)

• 1800 MHz Time Division Multiple Access (TDMA)
systems.

GENERAL DESCRIPTION

The CGY2021G is a DCS/PCS class 1 GaAs Monolithic
Microwave Integrated Circuit (MMIC) power amplifier
specifically designed to operate at 4.8 V battery supply.

The chip also includes a power sensor driver so that no
directional coupler is required in the power control loop.

The PA requires only a simple low-pass filter to comply
with the DCS/PCS transmit spurious specification. It can
be switched off and its power controlled by monitoring the
actual drain voltage applied to the amplifier stages.

QUICK REFERENCE DATA

SYMBOL PARAMETER

V

DD

I

DD

P

o(max)

T

amb

positive supply voltage − 4.5 − V
positive peak supply current − 1.4 − A
maximum output power − 34 − dBm
operating ambient temperature −20 − +85 °C

(1)

MIN. TYP. MAX. UNIT

Note

1. For conditions, see Chapters “AC characteristics” and “DC characteristics”.

ORDERING INFORMATION

TYPE

NUMBER

NAME DESCRIPTION VERSION

PACKAGE

CGY2021G LQFP48 plastic low profile quad flat package; 48 leads; body 7 × 7 × 1.4 mm SOT313-2

1997 Apr 03 2

Philips Semiconductors Preliminary specification

DCS/PCS 2 W power amplifier CGY2021G

BLOCK DIAGRAM

handbook, full pagewidth

RFI

(1) Ground pins 1 to 5, 9 to 17, 20 to 26, 28, 30, 32, 34 to 41 and 43 to 48.

V

DD1

29 33 42

27

(1)

GND

V

GG1

31

V

DD2

CGY2021G

Fig.1 Block diagram.

V

DD3

V

GG2

SENSOR

DRIVER

6,7,8

19

18

DETO/V

DD5

RFO/V

DD4

MGD771

PINNING

SYMBOL PIN DESCRIPTION

GND 1 to 5 ground
RFO/V

DD4

6 to 8 PA output and fourth stage supply voltage
GND 9 to 17 ground
DETO/V
V

GG2

DD5

18 power sensor output and supply voltage

19 third and fourth stage negative gate supply voltage
GND 20 to 26 ground
RFI 27 PA input
GND 28 ground
V

DD1

29 first stage supply voltage
GND 30 ground
V

GG1

31 first and second stage negative gate supply voltage
GND 32 ground
V

DD2

33 second stage supply voltage
GND 34 to 41 ground
V

DD3

42 third stage supply voltage
GND 43 to 48 ground

1997 Apr 03 3

Philips Semiconductors Preliminary specification

DCS/PCS 2 W power amplifier CGY2021G

handbook, full pagewidth

RFO/V
RFO/V

RFO/V

GND

GND

GND

GND

GND

DD4
DD4

DD4

GND

GND

GND

GND

GND

DD3

V

GND
43

42

18

19

DD5

GG2

V

DETO/V

GND
41

20

GND

GND
40

21

GND

GND
39

22

GND

GND
38

23

GND

GND

24 37

GND

36
35
34
33
32
31
30
29
28
27
26
25

MGD770

GND
GND
GND
V

DD2

GND
V

GG1

GND
V

DD1

GND
RFI
GND
GND

GND

GND
47

14

GND

46

15

GND

GND

GND

45

44

CGY2021G

16

17

GND

GND
48

1
2
3
4
5
6
7
8

9
10
11
12

13

GND

Fig.2 Pin configuration.

1997 Apr 03 4