5001-CL データシートの表示（PDF） - TDK Corporation

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5001-CL

Quad A/V driver

TDK Corporation 

AVPro® 5001

Quad A/V Drivers

VIDEO DESCRIPTION

The 5001 video section provides inputs for four

video signals which are typically AC coupled into

the device. The pin labeled MODE is used to

select the type of video inputs that are supported.

When the MODE pin is connected to ground, the

device is configured to support luma (Y), chroma

(C), and two composite signals. In this mode, the

Vid1, Vid2, and Vid3 paths each have an active

DC restore circuit. The DC restore circuit triggers

on the falling edge of the incoming video sync

pulse and then tries to force the blank level to a

fixed DC value. The trigger from the Vid1 path is

also passed along to the Vid2 and Vid3 paths to

insure that the DC restore circuits are triggered.

The Vid4 path is used for a chroma signal. This

path is set to a fixed DC level of 0.89V.

When the MODE pin is left open, the device is

configured to support RGB signals and a

composite signal. In this mode, all video paths

have active DC restore circuits. The Vid1 path

provides a master trigger to the other three DC

restore circuits. This accommodates an application

where the video sync for the RGB signals is

provided by the composite signal. The Vid2 path

also provides a trigger for the Vid3 and Vid4 pins.

This supports applications where the sync signal is

embedded in one of the RGB signals (sync on

green). For this application, the video source that

contains the sync pulse must be applied to Vid2.

An internal timing circuit is used to allow the DC

restore circuit to initially acquire the correct DC

level. The timing circuit requires that a 470 pF

capacitor be connected between the Tgen pin and

ground.

Vid1

Tgen

470

pF

DCR

Osc

Typical Video Circuit

Vid1_out

62

RL =

75

The output amplifiers are designed to provide a

gain of approximately two (2) so that a 137 ohm

load can be driven. The output impedance of each

video driver is nominally 12 ohm. An external 62

ohm resistor is placed in series with the output to

provide a nominal 75 ohm output impedance to

the system.

AUDIO DESCRIPTION

The 5001 audio section provides inputs for two audio

signals, typically left and right channels of a stereo

audio source. In many applications, the audio inputs

are generated by an external DAC.

The impedance of the 5001 audio input is

approximately 40k ohms. Each input has two

independently buffered outputs. Each buffer can

output a signal of 2 Vpp. The audio buffers use +5V

and -5V power supplies which allow the DC level of

the output to be 0 Vdc. For most applications, this

allows the inputs and outputs of the 5001 to be direct

coupled to the source and load. A resistor in series

with the load is suggested to provide over-current

protection.

Reference Generator

The 5001 generates internal reference currents based

on an external 10.0k ohm, 1% resistor connected

between the RRef pin and analog ground. The

reference generator also uses a 0.01 uF capacitor

connected between the Cbyp pin and analog ground

for filtering purposes.

Aud1

Aud1_out1

270 RL =

10k

Aud1_out2

Typical Audio Circuit

270

RL =

10k

2

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