BA7184 Просмотр технического описания (PDF) - ROHM Semiconductor

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BA7184

4-channel PRE / REC amplifier with auto-tracking interface

ROHM Semiconductor 

Video ICs

BA7184S

Parameter

〈Recording system〉 (Pin 12: L)

Quiescent current

Recording AGC level 1

Recording AGC level 2

AGC control sensitivity

AGC frequency characteristic

2nd harmonic distortion

Symbol Min. Typ. Max. Unit

Conditions

Iq (R)

—

67

IOAR1

27

30

IOAR2

24

27

∆IOAR — 0.3

∆IOAF – 8 – 3

100 mA No signal

33

mAP-P

Pin 14 input = 125mVP-P, pin 2: L, pin 5

output measurement

30

mAP-P

Pin 14 input = 125mVP-P, pin 2: H, pin 9

output measurement

2.0

dB

Pin 14 input = 62.5mVP-P, to 250mVP-P, pin 5

output level differential

— dB f = 8.0 / 1.0MHz, pin 14 input = 125mVP-P,∗2

2HDR — – 45 – 35 dBc Pin 14 input = 125mVP-P, 8MHz spurious

Measurement

circuit

Fig. 2

Fig. 2

Fig. 2

Fig. 2

Fig. 2

Fig. 2

3rd harmonic distortion

3HDR — – 50 – 35 dBc Pin 14 input = 125mVP-P, 12.0MHz spurious∗2

Cross modulation distortion

CMDR — – 50 – 35 dBc 4.0MHz ± 630kHz spurious∗2

Maximum output level

IOMR

40

50

— mAP-P When pin 5 output 2nd harmonic distortion is – 30dB

Recording current load characteristic ∆IORL – 2.0 – 0.3

—

dB

Pin 5 output level difference when load

L: 8.2 and 12µH∗2

Mute attenuation ratio

MUR — – 45 – 35 dBc Pin 5 output level difference for pin 12: M / L

Fig. 2

Fig. 2

Fig. 2

Fig. 2

Fig. 2

AGC mode holding voltage

VTH17H 2.8

—

VCC

V Pin 17 DC voltage to maintain recording

AGC operation.

AGC mode holding voltage

VTH17L

0

—

1.2 V Pin 17 DC voltage to maintain recording AGC stopped.

∗2 Guaranteed design values.

Note: dBc: dB below carrier (used to express relative level from carrier reference for convenience sake)

Fig. 2

Fig. 2

4

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