BA7665FS Просмотр технического описания (PDF) - ROHM Semiconductor

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BA7665FS

3-channel 75Ω driver with Y / C MIX

ROHM Semiconductor 

Multimedia ICs

•Measurement conditions

Parameter

Symbol

SW1

Switch conditions

SW2

SW7

SW8

Circuit current

ICC

2

1

1

2

Maximum

output level

OUTA

VOM1

3

2

1

3

MIXOUT

VOM2

3

2

1

3

OUTB

VOM3

3

1

2

3

Frequency

characteristics

OUTA

GF1

3

2

1

3

MIXOUT

GF2

3

2

1

3

OUTB

GF3

3

1

2

3

Crosstalk

OUTB→OUTA

GT1

3

1

2

3

OUTA→OUTB

GT2

3

2

1

3

OUTA

MT1

1

2

1

3

Mute attenuation

MIXOUT

MT2

1

2

1

3

OUTB

MT3

1

1

2

3

MIXOUT

MTC1

3

1

2

1

Chroma mute attenuation

OUTB

MTC2

3

1

2

1

Input impedance

—

ZIN

3

1

3

3

OUTA

GV1

3

2

1

3

Voltage gain

MIXOUT

GV2

3

2

1

3

OUTB

GV3

3

1

2

3

Inter-channel

voltage gain differential

—

∆GVC

—

—

—

—

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

BA7665FS

SW16

1

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

—

Measurement

method

Note 1

Note 2

Note 3

Note 4

Note 5

Note 5

Note 6

Note 7

Note 8

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 DC50µA 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]

4

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