CXA3031Q 查看數據表（PDF） - Sony Semiconductor

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CXA3031Q

Read/Write Amplifier (with Built-in Filters) for FDDs

Sony Semiconductor 

CXA3031Q

Pin

No.

Symbol

Pin

voltage

18 X360

20 XHG

—

18

20

—

10 VCC

—

1.2V

11 FCSET 3.8V

Equivalent circuit

Description

100k

1k

VCC

Filter, time domain filter and write current

1M/1.6M mode control. 1.6M mode is

selected when the logical voltage is Low.

2.1V

A.GND

Preamplifier voltage gain selection. Gain is

boosted by 6dB when the logical voltage is

Low compared to when the logical voltage is

High.

Power supply (5V) connection.

VCC

1k

11 Filter cutoff frequency setting resistor

147

connection. Connect the filter cutoff

frequency setting resistor RF between this

pin and VCC in order to set the cutoff

frequency.

A.GND

12 MMVA 0.5V

13 A.GND

—

14

FILTER

OUTB

3.4V

15

FILTER

OUTA

3.4V

16 (NC)

17

PRE

OUTB

3.4V

19

PRE

OUTA

3.4V

147

1.2V

140

140

300µ

300µ

140

140

200µ

200µ

VCC

12

A.GND

Time domain filter 1st monostable

multivibrator pulse width setting. Connect

the 1st monostable multivibrator pulse width

setting resistor RA between this pin and

A.GND.

Analog system GND connection.

VCC

14

15

A.GND

Filter differential outputs.

Not connected.

VCC

17

19

A.GND

Preamplifier differential outputs.

–4–

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