PS8352AL2-AX datasheet(16/20 Pages) RENESAS

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PS8352AL2

Chapter Title

R08DS0132EJ0100 Rev.1.00

Page 16 of 19

Aug 31, 2015

(4) Cautions

• Fluxes

Avoid removing the residual flux with freon-based and chlorine-based cleaning solvent.

2. Cautions regarding noise

Be aware that when voltage is applied suddenly between the photocoupler’s input and output at startup, the output

transistor may enter the on state, even if the voltage is within the absolute maximum ratings.

USAGE CAUTIONS

Usage cautions

(1) This product is weak for static electricity by designed with high-speed integrated circuit so protect against static

electricity when handling.

(2) When the primary power supply (VDD1) is off and only the secondary power supply (VDD2) is being applied

(VDD1 = 0 V and VDD2 = 5 V), VOUT+ outputs a low level, and VOUT− outputs a high level (VOUT+ = 1.3 V TYP.,

VOUT– = 3.8 V TYP.), regardless of the input voltages (VIN+ and VIN−).

(3) The output level of VOUT+ and VOUT− might be unstable for several seconds immediately after the secondary

power supply (VDD2) is applied while the primary power supply (VDD1) is being applied.

Board designing

(1) By-pass capacitor of more than 0.1

F is used between VCC and GND near device. Also, ensure that the

distance between the leads of the photocoupler and capacitor is no more than 10 mm.

(2) Keep the pattern connected the input (VIN+, VIN-) and the output (VOUT+, VOUT-), respectively, as short as possible.

(3) Do not connect any routing to the portion of the frame exposed between the pins on the package of the

photocoupler. If connected, it will affect the photocoupler's internal voltage and the photocoupler will not

operate normally.

(4) Because the maximum frequency of the signal input to the photocoupler must be lower than the allowable

frequency band, be sure to connect an anti-aliasing filter (an RC filter with R = 68

 and C = 0.01

F, for

example).

(5) The signals output from the PS8352A include noise elements such as chopping noise and quantization noise

generated internally. Therefore, be sure to restrict the output frequency to the required bandwidth by adding a

low-pass filter function (an RC filter with R =10 k

 and C = 150 pF, for example) to the operational amplifier

(post amplifier) in the next stage to the PS8352A.

Avoid storage at a high temperature and high humidity.

PS8352AL2-AX Datasheet(PDF) 16 Page - Renesas Technology Corp