BA7180AS Просмотр технического описания (PDF) - ROHM Semiconductor

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производитель

BA7180AS

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

ROHM Semiconductor 

Video ICs

BA7180AS / BA7180AFS

Parameter

Symbol Min. Typ. Max. Unit

Conditions (BA7180AS)

Measurement

circuit

〈Recording system〉 (Pin 11 in Fig. 2 mesurement circuit "L")

Quiescent current

Iq (R) — 72 110 mA No signal

Fig.2

Recording AGC level

IOAR

27

30

33

mAP-P

Pin 13 input = 125mVP-P, pin 9

output measurement

Fig.2

AGC control sensitivity

∆IOAR

—

0.3

1.5

dB

Pin 9 output level difference for pin 13

input = 62.5mVP-P ~ 250mVP-P

Fig.2

REC amplifier frequency characteristic

∆IOAF – 4 – 1.5

—

dB

Pin 9 output level difference for f = 8.0 / 1.0MHz,

pin 12 input = 125mVP-P, guaranteed design value.

Fig.2

2nd harmonic distortion

2HDR — – 45 – 38 dBc Pin 13 input = 125mVP-P 8MHz spurious

Fig.2

3rd harmonic distortion

3HDR

— – 50 – 40

dBc

Pin 13 input = 125mVP-P 12MHz spurious,

guaranteed design value.

Fig.2

Cross modulation distortion

CMDR — – 50 – 40 dBc 4.0MHz ± 630kHz spurious, guaranteed design value. Fig.2

Maximum output level

Recording current load

characteristic

IOMR 40 50 — mAP-P When pin 9 output 2nd harmonic distortion is -30dB

Fig.2

∆I ORL – 1.5 – 0.35

—

dB

Pin 9 output level difference for load L: 8.2

~ 12µH, guaranteed design value.

Fig.2

Mute attenuation ratio

MUR — – 45 – 38 dBc Pin 9 output level difference for pin 11: M / H.

Fig.2

AGC mode holding voltage

VTH15H 2.7 — VCC V Pin 17 DC voltage to maintain recording AGC operation

AGC mode holding voltage

VTH15L 0 — 1.2 V Pin 17 DC voltage to maintain recording AGC stopped

Note:

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

Fig.2

Fig.2

•Reference values (unless otherwise noted, Ta = 25°C, VCC = 4.8V and f = 4.0MHz)

Parameter

Symbol Min. Typ. Max. Unit

Conditions (BA7180AS)

ENVE output level

ENVE output level

VENV2'

1.8

2.3

2.8

VENV3'

3.35

3.6

3.85

V

Pin 15 output measurement when

pin 16 output = 100mVP-P.

V

Pin 15 output measurement when

pin 16 output = 400mVP-P.

4

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