KA2425B 데이터 시트보기 (PDF) - Samsung
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KA2425B Datasheet PDF : 6 Pages
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KA2425A
TEST CIRCUIT
V+
SPEECH NETWORK WITH DIALER INTERFACE
14
13
12
22K
16
KA2425A
VIN
400mVrms
18
17
10
1.0V
+
20µF
204
ILOOP
Fig 2. DTMF Driver Test
V+
10K
20mVrms
1KHz
150K
8.2K
4
503
7
33K
8
2
KA2425A
6
14
15
17
150Ω
3
11
12
10
18
13
Vs
Microphone Equivalent
+
20µF
ILOOP
203
600Ω
47Ω
10
204 150Ω 503
Fig 3. Transmit and sidetone level test
150K
V+
503
8.2K
33K
4
7
8
3
11
2
KA2425A
6
12
10
10
14
15
17
18
13
20µF
20mVrms
1KHz
+
203
Vs
ILOOP
47Ω
150Ω 503
204
Fig 4. AC Impedance, Receive and Sidetone Rejection Test
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