CXA2112 Sony Corporation, CXA2112 Datasheet - Page 12

• Manufacturer Part Number: CXA2112
• Description: LCD Driver
• Manufacturer: Sony Corporation

Description of Operation
1. INVERT_AMP
The VIDEO signal from VIDEO_IN (Pin 47) is amplified about 2.7 times at INVERT_AMP. Its output is
INV_OUT (Pin 46). Status of INVERT_AMP is determined by FRP (Pin 44) input (high: inverse, low: non-
inverse). Invert operation is carried out with SIGCEN (Pin 35) potential as center voltage of signal inversion.
OFFSET (Pin 48) input voltage corresponds to 100% white level of the signal input to VIDEO_IN.
When used in combination with the CXA2111R, connect the CXA2111R V33 (Pin 8) output to the CXA2112R
OFFSET. When use DA converter output as the VIDEO signal, connect DA converter maximum output voltage
(normally, DA converter's supply voltage).
2. SID
The signal input to SID_IN (Pin 39) is folded by SIGCEN potential, the same as for INVERT_AMP operation,
and outputs to SID_OUT (Pin 38).
Gain is about 4 times. SID_OFST (Pin 42) operates in the same way as OFFSET input for INVERT_AMP. In
combination with the CXA2111R, connect the CXA2111R SID_OUT (Pin 6) to the CXA2112R SID_IN, and
CXA2111R V33 (Pin 8) to the CXA2112R SID_OFST.
VIDEO IN
INV_OUT
FRP
approx.
2.7
V
V
IN
IN
Output level when input is
up to OFFSET level
approx.
1V
approx. 1V
– 12 –
OFFSET level
SIGCEN potential
CXA2112R