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參數資料
| 型號： | LA3220 |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 CHANNEL, AUDIO PREAMPLIFIER, DIP14 |
| 封裝： | DIP-14 |
| 文件頁數： | 3/8頁 |
| 文件大小： | 143K |
| 代理商： | LA3220 |
LA3220
No.912-3/9
Test Circuit
Test Procedure
Item
S1
S2
S3
S4
S5
S6
Measurement
location
Procedure
ICCO
2
off
1
off
-
Read ammeter.
VGo
1
on
off
1
off
A, B
Measure at VGo = 20log VO/VIN (dB) with
input voltage at VIN ; output voltage at VO.
VG
1
off
on
1
off
A, B
VG = 20log VO/VIN (dB)
VO max
1
off
on
1
off
B
Measure output voltage VO at THD = 1%
THD
1
off
on
1
off
B
Measure distortion factor at VO = 0.5V
CH sep
S1-1 S1-2
1
2
1
off
on
1
off
B
Measure crosstaik of amp 1, 2 at output voltage
VO = 0dBm
VNI
2
off
on
1
off
on
C
Obtain output nois voltage in 1kHz gain equivalent
when Rg = 2.2k
Ω
ALC width
1
off
2
on
off
B
Input voltage renge from when input voltage
VIN = -60dBm until output voltage VO goes up 3dB.
ALC balance
1
off
2
on
off
B
Output voltage VO level differnce between amp 1, 2
when input voltage VIN = -20dBm is applied.
ALC distortion
1
off
2
on
off
B
Measure distortion factor when input voltage
VIN = -20Bm is applied.
14
13
12
11
10
9
8
1
2
3
4
5
6
7
S4-1
S3-1
10
μF
22
μF
0.033
μF
470
μF
4.7
μF
4.7k
Ω
51k
Ω
51k
Ω
56
Ω
4.7k
Ω
680
Ω
680
Ω
10k
Ω
56
Ω
S6-1
12
300k
Ω
DS442
× 2
+
2.2k
Ω
+
S1-2
S2-2
S4-2
S3-2
680
Ω
10k
Ω
2
1
2
1
LA3220
S.G
2
S5-2
S2-1
10
μF
+
2.2k
Ω
S1-1
220
μF
4.7
μ
F
4.7
μ
F
22
μF
0.033
μF
+
470
μF
47
μF
+
220
μF
+
B1
B2
A
C1
N
B.P.F
20 to 20kHz
S6-2
VCC=5V
C2
B.P.F
20 to 20kHz
4.7
μF
680
Ω
+
S5-1
A
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