TK10651MTL/10651 データシートの表示（PDF） - Toko America Inc

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TK10651MTL/10651

LOW VOLTAGE COMPANDOR

Toko America Inc  

TK10651

APPLICATION INFORMATION (CONT.)

EXPANDER INPUT AMPLIFIER

The non-inverting and inverting input pins as well as the

output pins are available, and can be used as a buffer amp

or filter amp. A data signal can be obtained from the output

pin, without passing through the expander. The input level

and amplifier gain should be set to provide 180 mV(rms)

standard level at the data output pin (pin 17). The expander

input amplifier is not DC biased internally, therefore a bias

voltage from the expander's VREF pin (pin 14) should be

used. The maximum allowable load at the output pin is 10

kΩ.

EXP

OUT

51 k

10 k EXP NF

16

100 k

EXP

IN

15

TO VREF

DATA OUT

17

+

-

REFERENCE VOLTAGE SOURCE

(PINS 9 AND 14)

Pin 9 is the reference voltage pin for the compressor and

pin 14 is the reference voltage pin for the expander. The

reference voltages are obtained from an internal band gap

reference and used as the bias source for each section.

SWITCH CIRCUIT (PINS 11, 12, and 13)

The compressor's and expander's mute pins and the through

pin (noise reduction is off) are pulled up by internal current

sources, therefore they do not need an external pull up.

Concerning the switching logic, refer to the table in the Test

Circuit section.

11,12,13

AMPLIFIER (GAIN = 6)

EXP NF

16

10 k 10 k

18000 p

10 k

EXP

IN

15

100 k

6800 p

1000 p

TO VREF

DATA

OUT

17

+

-

3 kHz LPF

January 2000 TOKO, Inc.

Page 11

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