MSP4458 datasheet(43/85 Pages) MICRONAS

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PRELIMINARY DATA SHEET

MSP 44x8G

Micronas

Pin 38, CAPLA – Volume Capacitor Aux (Fig. 4–14)

A 10-

µF capacitor to AHVSUP must be connected to

this pin. It serves as a smoothing filter for Aux volume

changes in order to suppress audible plops. The value

of the capacitor can be lowered to 1-

µF if faster

response is required. The area encircled by the trace

lines should be minimized; keep traces as short as

possible. This input is sensitive for magnetic induction.

Pin 39, AHVSUP* – Analog Power Supply High Volt-

age

Power is supplied via this pin for the analog circuitry of

the MSP (except IF input). This pin must be connected

to the

+8 V supply. (+5 V-operation is possible with

restrictions in performance)

Pin 40, CAPLM – Volume Capacitor Main (Fig. 4–14)

A 10-

µF capacitor to AHVSUP must be connected to

this pin. It serves as a smoothing filter for Main volume

changes in order to suppress audible plops. The value

of the capacitor can be lowered to 1

µF if faster

response is required. The area encircled by the trace

lines should be minimized; keep traces as short as

possible. This input is sensitive for magnetic induction.

Pins 41, 42, NC – Pins not connected.

Pins 43, 44, AHVSS* – Analog Power Supply High

Voltage

Ground connection for the analog circuitry of the MSP

(except IF input).

Pin 45, AGNDC – Internal Analog Reference Voltage

This pin serves as the internal ground connection for

the analog circuitry (except IF input). It must be con-

nected to the VREF pins with a 3.3-

µF and a 100-nF

capacitor in parallel. This pins shows a DC level of typ-

ically 3.73 V.

Pin 46, NC – Pin not connected.

Pins 47, 48, SC4_IN_L/R – SCART4 Inputs

(Fig. 4–16)

The analog input signal for SCART4 is fed to this pin.

Analog input connection must be AC-coupled.

Pins 49, 52, and 55, ASG* – Analog Shield Ground

Analog ground (AHVSS) should be connected to this

pin to reduce cross-coupling between SCART inputs.

Pins 50, 51, SC3_IN_L/R – SCART3 Inputs

(Fig. 4–16)

The analog input signal for SCART3 is fed to this pin.

Analog input connection must be AC-coupled.

Pins 53, 54 SC2_IN_L/R – SCART2 Inputs (Fig. 4–16)

The analog input signal for SCART2 is fed to this pin.

Analog input connection must be AC-coupled.

Pins 56, 57 SC1_IN_L/R – SCART1 Inputs (Fig. 4–16)

The analog input signal for SCART1 is fed to this pin.

Analog input connection must be AC-coupled.

Pin 58, VREFTOP – Reference Voltage IF A/D Con-

verter (Fig. 4–13)

Via this pin, the reference voltage for the IF A/D con-

verter is decoupled. It must be connected to AVSS

pins with a 10-

µF and a 100-nF capacitor in parallel.

Traces must be kept short.

Pin 59, NC – Pin not connected.

Pin 60 MONO_IN – Mono Input (Fig. 4–16)

The analog mono input signal is fed to this pin. Analog

input connection must be AC-coupled.

Pins 61, 62, AVSS* – Analog Power Supply Voltage

Ground connection for the analog IF input circuitry of

the MSP.

Pins 63, 64, NC – Pins not connected.

Pins 65, 66, AVSUP* – Analog Power Supply Voltage

Power is supplied via this pin for the analog IF input cir-

cuitry of the MSP. This pin must be connected to the

+5V supply.

Pin 67, ANA_IN1

+ – IF Input 1 (Fig. 4–13)

The analog sound IF signal is supplied to this pin.

Inputs must be AC-coupled. This pin is designed as

symmetrical input: ANA_IN1

+ is internally connected

to one input of a symmetrical op amp, ANA_IN- to the

other.

Pin 68, ANA_IN

− – IF Common (Fig. 4–13)

This pins serves as a common reference for ANA_IN1/

+ inputs and must be AC-coupled.

Pin 69, ANA_IN2

+ – IF Input 2 (Fig. 4–13)

The analog sound if signal is supplied to this pin.

Inputs must be AC-coupled. This pin is designed as

symmetrical input: ANA_IN2

+ is internally connected

to one input of a symmetrical op amp, ANA_IN

− to the

other.

Pin 70, TESTEN – Test Enable Pin (Fig. 4–9)

This pin enables factory test modes. For normal opera-

tion, it must be connected to ground.

MSP4458 Datasheet(PDF) 43 Page - Micronas

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