CXA2570 Sony Corporation, CXA2570 Datasheet - Page 14

• Manufacturer Part Number: CXA2570
• Description: RF Matrix Amplifier
• Manufacturer: Sony Corporation

• RFDC
The signals input via the A, B, C and D pins are added, amplified and the RFDC signal is output.
RW/ROM switching, low-frequency gain adjustment and offset adjustment are possible.
• SW
This controls the laser (APC) on/off, active/sleep mode, and RW/ROM mode switching.
Switching is controlled by the voltage applied to the SW pin (Pin 12).
The VC buffer is kept active even in sleep mode.
In the function block, BGR and MODE_SW are always set to active mode.
Control voltage
V
VC or Hi-Z
GND
CC
RFDC = Gain (A + B + C + D)
Low-frequency gain
fc (Typ.)
The gain can be adjusted by the external resistance connected between Pins 23 and 24.
12
C
D
A
B
6
7
8
9
Item
R (ofst)
SW
15k
APC
OFF
ON
ON
ROM: 20dB
RW: 32dB
ROM: 12MHz
RW: 5MHz
VC
10k
40k
Active/Sleep
RW/ROM, Active/Sleep, APC_ON/OFF
Active
Active
Sleep
ROM
RW
– 14 –
RFDCI
1.5k
RW/ROM
ROM
VC
RW
24
—
5.1k
23
RFDCO
CXA2570N