AK4254 Datasheet, PDF (4/22 Pages) Asahi Kasei Microsystems – Capacitor-less Video Amp with 7:2 Video Switch

[AK4254]
No. Pin Name I/O Function
Power-Down Mode Pin
24
PDN
I When at “L”, the AK4254 is in the power-down mode and held in reset, the AK4254
must always be reset upon power-up in Serial Control Mode (P/S pin= “L”).
25 VOUT2 O Video Output #2 Pin.
Negative Voltage Output Pin for Video Amplifier 2
Connect to CVSS2 with a 1.0μF capacitor that has the low ESR (Equivalent Series
26 CVEE2 O Resistance) over all temperature range. When this capacitor has the polarity, the
positive polarity pin should be connected to the CVSS2 pin. Non-polarity capacitors can
also be used.
Charge Pump Ground Pin, 0V
Connect to CVEE2 with a 1.0μF capacitor that has the low ESR (Equivalent Series
27 CVSS2
- Resistance) over all temperature range. When this capacitor has the polarity, the
positive polarity pin should be connected to the CVSS2 pin. Non-polarity capacitors can
also be used.
Negative Charge Pump Capacitor Terminal 2 Pin
Connect to CP2 with a 1.0μF capacitor that has the low ESR (Equivalent Series
28
CN2
I Resistance) over all temperature range. When this capacitor has the polarity, the
positive polarity pin should be connected to the CP2 pin. Non polarity capacitors can
also be used.
Positive Charge Pump Capacitor Terminal 2 Pin
Connect to CN2 with a 1.0μF capacitor that has the low ESR (Equivalent Series
29
CP2
O Resistance) over all temperature range. When this capacitor has the polarity, the
positive polarity pin should be connected to the CP2 pin. Non polarity capacitors can
also be used.
30 CVDD2 - Charge Pump Power Supply Pin, 2.7V∼3.6V
Note: All digital input pins (CADO/SEL10, CADT/SEL11, CSN/SEL12, CCLK/SCL/SEL20, CDTI/SDA/SEL21,
I2C/SEL22) must not be left floating.
■ Handling of Unused Pin
The unused I/O pins should be processed appropriately as below.
Classification
Analog
Digital
Pin Name
VIN1-7
CSN/SEL12
Setting
These pins should be open.
These pins should be connected to AVDD or AVSS.
MS0586-E-01
-4-
2007/08