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CGY 121 A
GaAs MMIC
Preliminary Datasheet
l Variable gain amplifier
(MMIC-Amplifier) for mobile communication
l Typical Gain Control range over 50dB
l Positive Control Voltage
l 50input and output matched
l Low power consumption
l Operating voltage range: 2.7 to 6 V
l Frequency range 800 MHz ... 2.5 GHz
ESD: Electrostatic discharge sensitive device,
observe handling precautions!
Vcontrol
6
RF-in; -Vg
RF-GND
4
5
1
Vd2; RF-out
2
RF-GND
3
Vd1
Type
CGY 121 A
Marking
Y9S
Ordering code
(taped)
Q-62702-G66
Package1)
MW-6
Maximum ratings
Characteristics
Drain voltage
Neg. supply voltage
Pos. control voltage
Channel temperature
Storage temperature range
Total power dissipation (TS < 81°C) 2)
Symbol
VD
VG
Vcon
TCh
Tstg
Ptot
Thermal resistance
Characteristics
Channel-soldering point (GND)
Symbol
RthChS
1) Dimensions see page 9.
2) Please care for sufficient heat dissipation on the pcb!
*) Pin-out changed compared to CGY120: 180° rotation
max. Value
8
-8
4
150
-55...+150
550
max. Value
125
Unit
V
V
V
°C
°C
mW
Unit
K/W
Siemens Aktiengesellschaft
Semiconductor Group
1
1
23.06.98
HL HF PE GaAs1
1998-11-01

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CGY 121 A
Functional block diagram:
Pin / -VG(4)
Vcon (6)
Control
Circuit
VD1 (3)
VD2 (1)
Pout (1)
GND (2, 5)
Pin #
1
2
3
4
5
6
Name Configuration
VD2 / Drain voltage 2nd stage / RF-0utput
Pout
RF-Gnd
VD1 Drain voltage 1st stage
VG / Pin Negative voltage at current control circuit (-4V) / RF-Input
RF-Gnd
Vcontrol Positive voltage for gain control (0V....3V)
Siemens Aktiengesellschaft
Semiconductor Group
2
2
23.06.98
HL HF PE GaAs1
1998-11-01

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CGY 121 A
Electrical characteristics
(TA = 25°C, f = 900 MHz, Vg = -4V, RS = RL = 50 unless otherwise specified)
Characteristics
Symbol min typ max
Power Gain
Vd=3V; I=45mA; Vcon=3V
G 17 19 -
Input return loss
Vd=3V; I=45mA; Vcon=3V
RLin
-
11
-
Output return loss
Vd=3V; I=45mA; Vcon=3V
RLout
-
10
-
Gain Control Range
Vcon=3 V ... 0V; Vd=3V; I=45mA
dG 48 53
-
1dB gain compression
Vd=3V; I=45mA; Vcon=3V
P1dB
-
14
-
Unit
dB
dB
dB
dB
dBm
Electrical characteristics
(TA = 25°C ,f = 1800 MHz, Vg=-4V, RS = RL = 50 unless otherwise specified)
Characteristics
Symbol min typ max
Power Gain
Vd=3V; I=45mA; Vcon=3V
G
15.5
17.5
-
Input return loss
Vd=3V; I=45mA; Vcon=3V
RLin
-
10
-
Output return loss
Vd=3V; I=45mA; Vcon=3V
RLout
-
8.5
-
Gain Control Range
Vcon=3 V ... 0V; Vd=3V; I=45mA
dG 48 53
-
1dB gain compression
Vd=3V; I=45mA; Vcon=3V
P1dB
-
14
-
Unit
dB
dB
dB
dB
dBm
DC characteristics
Characteristics
Gate current (Pin 4)
Vg=-4V
Control current (Pin 6)
Vg=-4V; Vcon=0V...3V
Supply current
Vg = -4V; Vcon = 3V
Symbol min
typ
max
Unit
Ig - 1.0 - mA
Ic - 0.5 - mA
Id - 45 - mA
Siemens Aktiengesellschaft
Semiconductor Group
3
3
23.06.98
HL HF PE GaAs1
1998-11-01