BA7665FS datasheet(4/8 Pages) ROHM

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Multimedia ICs

BA7665FS

•Measurement conditions

Parameter

Symbol

Measurement

method

Switch conditions

Circuit current

Maximum

output level

Frequency

characteristics

Crosstalk

Mute attenuation

Chroma mute attenuation

Input impedance

Voltage gain

Inter-channel

voltage gain differential

ICC

VOM1

VOM2

VOM3

GF1

GF2

GF3

GT1

GT2

MT1

MT2

MT3

MTC1

MTC2

ZIN

GV1

GV2

GV3

∆GVC

OUTA

MIXOUT

OUTB

OUTA

MIXOUT

OUTB

→OUTA

OUTA

→OUTB

OUTA

MIXOUT

OUTB

MIXOUT

OUTB

OUTA

MIXOUT

OUTB

Note 1

Note 2

Note 3

Note 4

Note 5

Note 6

Note 7

Note 8

SW1

—

SW2

—

SW7

—

SW8

—

SW16

—

∗ The mute switch level was substituted by using H = 2.4V and L = 1.1V for the above measurements.

—

Measurement method

Note 1: Measure the quiescent current.

Note 2: Connect a distortion meter to the output, and input a f = 1kHz sine wave.

Adjust the output level until the output distortion is 1%. The output voltage at this time is the maximum output level VOM [VP-P].

Note 3: Input 1VP-P, 7MHz and 1MHz sine waves, and measure the corresponding outputs VO7 and VO1. The frequency characteristic is given by

GF = 20

∗ Log (VO7 / VO1) [dB].

Note 4: Input a 1VP-P, 4.43MHz sine wave, and measure the output Vo [VP-P] The interchannel crosstalk is given by CT = 20

∗ Log (VO / VIN) [dB].

Note 5: Input a 1VP-P, 4.43MHz sine wave, and measure the output Vo [VP-P] The mute attenuation is given by

MT = 20

∗ Log (VO / VIN) [dB].

Note 6: Measure the input pin voltage VIN50 when a current of DC50

µA is flowing into the input pin. Measure the input pin open-circuit voltage.

The input impedance is given by

ZIN = | VIN50 – VIN0 | / 50

∗ 103 [kΩ].

Note 7: Input a 1VP-P, 4.43MHz sine wave, and measure the output VO [VP-P] The voltage gain is given by

Gv = 20

∗ log (VO / VIN) [dB].

Note 8:

∆GVC = | GV1 – GV2 | [dB]

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