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Operation Notes

1.

Numbers and data in entries are representative design values and are not guaranteed values of the items.

2.

Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure to verify

circuit characteristics for your particular application. Modification of constants for other externally connected circuits may cause

variations in both static and transient characteristics for external components as well as this Rohm IC. Allow for sufficient

margins when determining circuit constants.

3.

Absolute maximum ratings

Use of the IC in excess of absolute maximum ratings, such as the applied voltage or operating temperature range (Topr), may

result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such

damage is suffered. A physical safety measure, such as a fuse, should be implemented when using the IC at times where the

absolute maximum ratings may be exceeded.

4.

GND potential

Ensure a minimum GND pin potential in all operating conditions. Make sure that no pins are at a voltage below the GND at any

time, regardless of whether it is a transient signal or not.

5.

Thermal design

Perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation (Pd) in actual

states of use.

6.

Short circuit between terminals and erroneous mounting

Pay attention to the assembly direction of the ICs. Wrong mounting direction or shorts between terminals, GND, or other components

on the circuits, can damage the IC.

7.

Operation in strong electromagnetic field

Using the ICs in a strong electromagnetic field can cause operation malfunction.

Fig.6 Total harmonic distortion vs

Output voltage (BD3824FS)

0.0001

5

0.001

0.01

0.1

1

1m

3

10m

100m

1

-40C

25C

85C

Fig.7 Voltage gain vs Frequency

(BD3822FS)

FREQUENCY : f [Hz]

10

100k

10k

100

1k

+2

0

+4

+6

+8

+10

-10

-8

-6

-4

-2

Fig.8 Voltage gain vs Frequency

(BD3824FS)

FREQUENCY : f [Hz]

-8

-12

-4

0

-20

-16

10

100k

10k

100

1k

Fig.9 ALC I/O characteristic

(BD3822FS)

INPUT VOLTAGE : VIN [Vrms]

10m

100m

100u

1m

5

1

1m

5

1

10m

100m

-3dBV

-5dBV

-7dBV

Fig.10 Square-Low Compression amp

I/O characteristic (BD3824FS)

1

500m

3

4

2

0

5

0

1.5

1

2.5

2

Fig.11 Output load characteristic

(BD3822FS, BD3824FS)

0

3

1

2

100

100000

1000

10000