MITSMI MM1278XA, MM1278XD Datasheet

MITSUMI

High Precision Operational Amplifier MM1278

High Precision Operational Amplifier

Monolithic IC MM1278

Outline

This IC is a dual-type operational amplifier, with two built-in operational amplifiers, and achieves extremely
low offset voltage with a single power supply. The input offset voltage and the input offset voltage
temperature drift of this operation amplifier are one digit less than those of our conventional products. A
single power supply can be used, so there is no need to create a mid-point potential, and it can be operated
with the voltage from two batteries. Due to the single power supply, low current consumption, and low offset
voltage, two batteries can be used for operation, making it appropriate for equipment that amplifies the very
small signal of portable equipment.

Features

General

1. Power supply voltage V

CC=1.8V~6V

optimum for drive by batteries

2. Current consumption 0.1mA typ.

3. Power supply line elimination ratio 60dB typ.

Amplifier section

1. Input voltage range

-

0.2V~+0.3V

2. Super low input offset voltage ±0.1mV typ.

3. Input offset voltage ±1µV/°C typ.

4. Input offset current 1nA typ.

5. Input bias current 50nA typ.

6. Gain 100dB typ.

Package

SOP-8D (MM1278XA)
DIP-8A (MM1278XD)

Applications

1. Amplification and detection of normal very small voltage on portable equipment.

2. Amplification of very small voltage for sensors (thermocouples, strain gauges, magnetic sensors)

3. Detedtion of very small current

MITSUMI

High Precision Operational Amplifier MM1278

Pin Assignment

MM1278XF, MM1278XD

1432

8567

SOP-8D/DIP-8A

1 AIN+

2 AIN

-

3 AOUT

4 GND

5 B

IN+

6 BIN

-

7 BOUT

8 VCC

Block Diagram

Absolute Maximum Ratings

(Ta=25°C)

Item Symbol Rating Units

Storage temperature T

STG

-

40~+125 °C

Operating temperature T

OPR

-

20~+75 °C

Power supply voltage V

CC max.

-

0.3~+10 V

Input voltage V

IN

-

0.3~+10 V

Allowable power dissipation Pd 300 mW