CXA1843Q 查看數據表（PDF） - Sony Semiconductor

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CXA1843Q

High-Speed Sample-and-Hold IC

Sony Semiconductor 

CXA1843Q

Pin

No.

Symbol

Pin voltage

12 AVCC3

5V (Typ.)

13 AVEE3

–5V (Typ.)

–2.8V

As shown in the

Application

14

REFOUT

Circuit, PNP TR.

is connected

and 2.5V is

applied to

Pin18.

15 REFFB

–2V

As shown in the

Application

Circuit, PNP TR.

is connected

and 2.5V is

applied to

Pin18.

16 NC

—

17 AVCC4

5V (Typ.)

Equivalent circuit

AVCC4

400µ

130

REFFB

REFOUT

AVEE3

DVEE2

Description

Analog positive power supply.

Analog negative power supply.

Connect the base of the

external PNP transistor to

create a –2V power supply.

Connect the emitter of the

external PNP transistor to

create a –2V power supply.

Connect to AGND.

Analog positive power supply.

AVCC4

18 REFIN

2.5V (Typ.)

REFIN

130

GND

DVEE2

External DC input for adjusting

the –2V power supply.

300µ

DVCC2

19 REX2

Approx. 0.5V

When external

resistor is

connected

between Pin 19

and AGND

REX2

GND

DVEE2

20 NC

—

1k

130

0.5V

Connect external resistor that

determines the time interval (T2)

between master clock (MCLK)

rise and A/D converter clock

(A/D CLK) fall.

(Normally connect to 1.6kΩ)

Connect to AGND.

–3–

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