SA5209N PHILIPS [NXP Semiconductors], SA5209N Datasheet - Page 6

• Manufacturer Part Number: SA5209N
• Description: Wideband variable gain amplifier
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
1990 Aug 20
Wideband variable gain amplifier
R
2 fL
1
L
1
1
= R
V
R
R
R
R
=
=
IN
2
3
4
5
6
RF/IF
INPUT
= 3.9k
= 360
= 62k
= 100
= 1k pot
10k
L
50
2
10 F
0.1 F
0.1 F
0.1 F
5209
SOURCE
50
Figure 3. AGC Configuration Using Cascaded NE5209s
1
2
3
4
5
6
7
8
Figure 5. Broadband Noise Optimization
MINI CIRCUITS
2:1 BALUN
OR SIMILAR
Figure 4. VGA AC Evaluation Board
1 : 2
V
GND1
IN
GND1
IN
GND1
V
V
AGC
5209
CC1
BG
A
B
(16-Pin SO, 150-mil wide)
R6
6
5230
C4
R4
+5V
+1V
5209
–
+
5209
V
OUT
AGC
OUT
V
GND
GND2
GND2
GND2
GND2
CC2
A
B
2
D1
L1
R5
R3
16
15
14
13
12
10
R1
11
9
50
BAT 17
BAT 17
D3
C3
L2
R2
V
CC
0.1 F
0.1 F
OUTPUT
50
D2
V
CC
0.1 F
OUT
OUT
This circuit will exhibit about a 7dB
noise figure with approximately
22dB gain.
A
B
AGC
OUTPUT
V
NE/SA5209
+
Product specification
5VDC
V
CC
SR00239
SR00240
SR00241