FX828D2

更新时间： 2024-02-04 11:34:50

品牌	Logo	应用领域
CMLMICRO		分布式控制系统 DCS
页数	文件大小	规格书
34页	829K
描述
CTCSS/DCS/SELCALL Processor

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数据手册

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FX828D2 数据手册

CTCSS/DCS/SELCALL Processor

FX828

1.3

Signal List (continued)

Package

D2/D5/P4

Signal

Name

COMPOUT

Description

Pin No.

Type

O/P

I/P

The output of the comparator.

The input to the comparator.

COMPIN

A/D CAP 1

O/P

An internal reference voltage for the CTCSS A

to D. Decouple to V_SSwith an external

capacitor.

A/D CAP 2

O/P

An internal reference voltage for the DCS A to

D. Decouple to V_SSwith an external capacitor.

Power

O/P

The negative supply rail (ground).

V_BIAS

A bias line for the internal circuitry, held at ½

V_DD. This pin must be decoupled by a capacitor

mounted close to the device pins.

RX AMP IN

I/P

The inverting input to the Rx input amplifier.

RX AMP OUT

O/P

The output of the Rx input amplifier and the

input to the audio filter section.

RX AUDIO OUT

TX AUDIO OUT

SUM IN

O/P

I/P

Output of the Rx audio filter section.

Output of the selcall tone generator.

Input to the audio summing amplifier.

Output of the audio summing amplifier.

Input to MOD1 audio gain control.

SUM OUT

MOD1 IN

O/P

I/P

TX SUB AUDIO OUT

MOD1

O/P

Power

Output of the CTCSS or DCS Tx tone generator.

Output of MOD1 audio gain control.

Output of MOD2 audio gain control.

MOD2

V_DD

The positive supply rail. Levels and voltages are

dependent upon this supply. This pin should be

decoupled to V_SSby a capacitor.

Notes: I/P

O/P

Input

Output

D/828/4

1 2 3 456 7 8...34

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