cxa1898q Sony Electronics, cxa1898q Datasheet - Page 20

• Manufacturer Part Number: cxa1898q
• Description: Recording/playback Equalizer Amplifier
• Manufacturer: Sony Electronics

3. AMS
(1) AMS output logic
AMS OUT (Pin 2) is an open collector output pin. When a 2.2k resistor is connected to V
Low : approximately 0.5V (I
High : V
Fig. 1 shows the AMS block diagram.
Fig. 2 shows the frequency response of the signal output from HPF.
AMS OUT (Pin 2)
Detection status
DD
GAIN
(dB)
G
PB OUT1
PB OUT2
10
Signal detection
OL
= 2mA (max.))
L
SA
f
C
1kHz
AMS GAIN
Fig. 2 Frequency Response
Fig. 1 AMS Block Diagram
25kHz
LPF
No signal detection
Inside IC
GND
48
H
100k
– 20 –
f (Hz)
HPF
V
DD
DET
1
V
DD
AMS OUT
AMS FIL
V
DD
25kHz
2
GND
3
AMS GND
100kHz
DD
:
CXA1898Q