MB86434 Ver la hoja de datos (PDF) - Fujitsu

Número de pieza

componentes Descripción

Lista de partido

MB86434

5V Single Power Supply Audio Interface Unit (AIU)

Fujitsu 

MB86434

3. Analog Output

The MB86434 has a total of four analog output circuits, including the three speaker drive circuits (receiver, earphone

and tone) and the accessory output.

(1) Speaker Drive Amp

The speaker drive amps include two circuits (receiver and tone) with BTL output and one system (earphone) with

single output. Because the speaker amp requires relatively high levels of power, it is connected to speaker selection

switches (sw6-sw9) for power-down mode selection.

Two systems (receiver and earphone) have fixed gain levels, while the other system (tone) allows gain adjustment

by means of external resistors.

In addition, the tone speaker amp is able to use the 200 mW large-current power circuit

Table Speaker Drive Amp Output Standards

Parameter

Receiver speaker amps

(EAR, XEAR)

Output type

Load resistance *1

Load resistance *2

Load capacity *2

Final stage gain

Maximum output power

BTL

32 Ω (typ)

2.8 kΩ (typ)

70 nF

6.0 dB

(between EAR-XEAR)

10 mW (min)

*1: Dynamic-type speaker

*2: Piezoelectric-ceramic type speaker

Earphone speaker amp

(JEAR)

Single

32 Ω (typ)

2.8 kΩ (typ)

70 nF

0.0 dB/–6.0 dB

(JEAR)

5 mW (min)

Tone speaker amps

(TONE, XTONE)

BTL

32 Ω (typ)

2.8 kW (typ)

70 nF

–5 to 20 dB

(between TONE-XTONE)

200 mW (min)

19

Share Link: