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Datasheet: F0321818Q (Eudyna Devices Inc.)

2 Ghz Bandwidth Limiting Amplifier

 

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Eudyna Devices Inc.
Features
-5 V single power supply
20 dB typical gain
2.0 GHz typical -3 dB cutoff frequency
On-chip matching to 50
55 mA typical operating current
Low-cost 20-lead QFP package
Differential input and output
Differential ECL compatible input
Applications
Post-amplifier of an optical receiver circuit
up to 2.5 Gbps
Logic gate buffer to interface between analog circuit and logic circuit
Functional Decription
The F0321818Q is a stable GaAs integrated limiting amplifier for use in a post-amplifier
of an optical receiver circuit up to 2.5 Gbps. The F0321818Q typically specifies a small
signal gain of 20 dB (Rs=RL=50
) with a 3 dB-cutoff-frequency of 2.0 GHz. It features
single +5 V supply operation, excellent VSWR's of 1.1:1, and a typical dissipation current of
55 mA.
The F0321818Q can be also used as interface circuits in sensing systems and measure-
ment instruments. Emitter coupled logic (ECL) or source coupled FET logic (SCFL) circuits
are the most popular IC's for high speed digital circuits; the F0321818Q operating under a
differential ECL compatible input condition is the best choice as the interface IC to join ana-
log circuits to ECL circuits or conventional GaAs logic IC's.
01.08.28
Limiting Amplifier
F0321818Q
2 GHz Bandwidth
Preliminary
F0321818Q
2GHz Limiting Amplifier
Absolute Maximum Ratings
T
a
=25
C, unless specified
Recommended Operating Conditions
V
DD
= GND
Electrical Characteristics
T
a
= 25
C, V
DD
= 0 V, V
SS
= -5V, unless specified
Parameter
Symbol
Value
Unit
Supply Voltage
V
SS
V
DD
-7 to V
DD
+0.5
V
Supply Current
I
DD
80
mA
Input Voltage Swing (AC)
V
IN+
, V
IN-
1
V
Output Voltage
V
OUT+
, V
OUT-
V
SS
-2.5 to V
SS
V
Ambient Operating Temperature
T
a
0 to +70
C
Strage Temperature
Tstg
-55 to +125
C
Parameter
Symbol
Value
Unit
Min.
Typ.
Max.
Supply Voltage
V
SS
-5.46
-5
-4.75
V
AC Coupled Load
RL
-
50
-
Ambient Operating Temperature
T
a
0
25
70
C
Parameter
Symbol
Test Conditions
Value
Unit
Min.
Typ.
Max.
Supply Current
V
DD
Pin=-40dBm
-
55
70
mA
Input Bias Point
V
IN
-
-3.5
-
V
Output Bias Point
V
OUT
-
-1.5
-
V
VSWR (IN,OUT)
SWR
Pin=-40dBm f=1NHz
-
1.1
1.8
-
Gain
GV
Pin=-40dBm
RL-50
f=1NHz
18
20
-
dB
-3dB High Frequency Cutoff
Fc
Pin=-40dBm
RL-50
2.0
-
GHz
Maximum Output Swing
(single output)
Vom
RL-50
0.4
0.6
0.8
V
2GHz Limiting Amplifier
F0321818Q
Block Diagram
Pin Assignments(Top View)
Pin Descriptions
V
DD
V
SS
V
OUT-
V
OUT+
V
IN+
V
IN-
LPF-
LPF+
Amp.
Amp.
Output
Buffer
1
16
3
14
4
13
5
12
6
11
2
15
7
20
8
19
10
17
9
18
No.1 LEAD
IDENTIFIER
1
VDD
2
VOUT
3
VDD
4
5
6
7
LPF - AC - GND
8
VIN-
9
10
Input
11
LPF-
12
13
14
15
16
17
18
VSS
VSS
19
20
Supply Voltage
Supply Voltage
VOUT
VDD
VDD
VSS
VSS
VSS
VSS
* Other pins are VDD
Supply Voltage
Supply Voltage
Supply Voltage
VSS
NC
LPF-
Output
LPF+
LPF+
VIN+
Output
Supply Voltage
Supply Voltage
Supply Voltage
Supply Voltage
Supply Voltage
Supply Voltage
LPF - AC - GND
Input
LPF
AC - GND
LPF + AC - GND
No Connection
F0321818Q
2GHz Limiting Amplifier
Test Circuits
*
*
50
50
1)AC Characteristics
F0321818Q
LPF-
V
SS
V
IN-
V
OUT-
LPF+
V
DD
V
DD
V
IN+
V
OUT+
0.1
F
0.1
F
0.1
F
Pin =-40dBm
2200
pF
Vector
Network
Analyzer
50
50
2)Limiting Characteristcs
*
*
*
*
50
50
50
LPF-
V
SS
V
IN-
V
OUT-
LPF+
V
DD
V
DD
V
IN+
V
OUT+
0.1
F
0.1
F
0.1
F
2200
pF
Pulse
Pattern
Generator
Attenuator
Sampling
Oscilloscope
DATA
CLOCK
* DC BLOCK(PICOSECIND PULSE LABS, MODEL 5501)
F0321818Q
2GHz Limiting Amplifier
F0321818Q
Typical AC Characteristics
(1) Gain
T
a
=25
C, V
DD
=+5 V, V
SS
=GND, Pin =-40 dBm, RL =50
,300 kHz-3 GHz
(2) Depemdence of Gain and High Frequency Cutoff on Power Supply Variations
T
a
=25
C, V
DD
=-5 V, V
SS
=GND, Pin =-40 dBm, RL =50
,300 kHz-3 GHz
19
20
21
22
23
Gain(dB)
High Frequency Cut-off(GHz)
4.5
5.0
5.5
V
DD
(V)
4.5
5.0
5.5
V
DD
(V)
2.10
2.12
2.14
2.16
2.18
2.20
1M
10M
100M
1G
Frequency(Hz)
0
9
18
27
(dB)
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