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MS87V1021

Recording and Playback IC with Built-in 2-Mbit DRAM

Oki Electric Industry 

1Semiconductor

PEDS87V1021-01

MS87V1021

Analog Characteristics

Parameter

DA output relative error

LPF input voltage range

OP-amp open loop gain

OP-amp input impedance

OP-amp load resistance

AOUT load resistance

Symbol

|VDAE|

VFIN

GOP

RINA

ROUTA

RAOUT

Condition

No load

—

fIN = 0 to 4 kHz

—

—

—

(VDD = 2.7 to 3.6V,Ta = -20 to +70°C)

Min.

Max.

Unit

—

5

mV

1/4 × VDD

3/4 × VDD

V

10

dB

1

—

MΩ

100

—

kΩ

100

—

kΩ

Analog Input Amplifier Ciricuit

This IC contains an OP amplifier with the inverting input pin and output pin.

The analog circuit reference voltage (signal ground) is internally input as the non-inverting input. When

amplification is required, adjust the amplification factor using an external resistor after constructing the inverting

amplifier circuit.

VIN – + R1

VLO

R2

LIN

LOUT

VLO

Inside LSI

–

+

SG

R2

VLO = R1 VIH

VDD

VFIN (max)

1

2 VDD

VFIN (min)

GND

The output pin, LOUT, of OP amplifier is internally input to LPF (Low Pass Filter). Adjust the gain using the

external resistor so that the VLO is within the accessible input voltage range VFIN. If VLO is over the VFIN, the LPF

output waveform will be distorted.

The example of SCF input voltage range is shown below.

Model

MS87V1021

Supply voltage VDD

3V

SCF admissible voltage range

Min.

Max.

0.75 V

2.25 V

SCF admissible input voltage

1.5 Vp-p

The minimum value of OP-amp load resistance is 100 kΩ. The feedback resistance R2 of inverting amplifier

circuit must be larger than 100 kΩ.

11/63

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