TA2153FN

2003-01-18

4

Pin No.

Symbol

I/O

Function Description

Remarks

22

RFCT

O

RFRP signal center level output terminal.

¾

23

PKC

I

Time constant adjustment terminal for peak detection.

Adjusted by capacitance.

24

RFRPIN

I

Input terminal for track count signal output amp.

¾

25

RFGO

O

Output terminal for RF signal amplitude adjustment amp.

¾

26

GVSW

I

Amp (AGC, FE, TE) gain switching terminal.

GVSW

Mode

GND

CD-RW

HiZ

Normal

Normal

Low (GND) is for 5 times

gain.

27

AGCIN

I

Input terminal for RF signal amplitude adjustment amp.

Connected to RFO through

capacitance.

28

RFO

O

Output terminal for RF signal amp.

¾

29

GND

¾

Ground terminal.

¾

30

RFN2

I

Input terminal for RF signal amp.

Connected to pin-diode

output A

+ B + C + D

(through resistor).

Note 1: Pin3 (GMAD) is gm adjustment terminal for AGC amp by applying a voltage (between 1.5 V and 4.2 V).

If pin3 (GMAD) is open, voltage of this terminal is fixed VR by IC interior.

Characteristic of frequency (open-loop characteristic) and voltage is as below.

Note 2: Current is changed by pin3 (GMAD) voltage.

==== 25°C)

Characteristics

Symbol

Rating

Unit

Power supply voltage

8

V

Power dissipation

500

mW

Operating temperature

-40~85

°C

Storage temperature

-55~150

°C

Gain

Frequency

GMAD Terminal Voltage

1.5 V

4.2 V

By changing a voltage (pin3) between 1.5 V and 4.2 V,

frequency band width is changed.

3

VR

GMAD

(Note2)

VR