SM5302A

NIPPON PRECISION CIRCUITS INC.—20

USAGE PRECAUTIONS

Slave Address (94h) Setting

When slave address 94h is used, the ADS input must be left open circuit. In this case, an external resistor

should be connected as shown in figure 6 to reduce the risk of malfunction due to large external spikes or other

noise. The recommended value is 10k

Ω.

Oscillation Prevention Capacitor Connection

If the sag compensation circuit is used with 2 output capacitors connected, the capacitors should be mounted

within approximately 8cm of the IC pins. If the distance exceeds 8cm, they may cause an oscillation. A 15pF

oscillation prevention capacitor should be connected between OUTnA and OUTnB. If the sag compensation

circuit is not used, OUTnA is connected to OUTnB. As there is only 1 output capacitor, an oscillation preven-

tion capacitor is not required.

Unused Analog Inputs

It is recommended that unused analog inputs should be connected to ground through a capacitor as shown in

figure 8.

Direct Input Mode

In direct input mode, the signal is connected to the input without an input capacitor. However, the input DC

voltage range varies with the mode setting, hence the signal must be appropriately biased for the corresponding

output signal. Note that even if these limits are exceeded, device breakdown will not occur if still within the

absolute maximum ratings.

Figure 6. Slave address 94h setting

VDD

VSS

ADS

10k

10k

Slave address

= 94h

Figure 7. Oscillation prevention capacitor connection

OUTnA

OUTnB

> 8cm

15p

Figure 8. Unused analog inputs

INnA

(Used input)

INnB

(Unused input)

Video Signal In

Figure 9. Direct input mode

Video Signal In

INnA

INnB

VCC

VL

GND