MITSUMI MM1278

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
2. Current consumption
3. Power supply line elimination ratio
Amplifier section
1. Input voltage range
2. Super low input offset voltage
3. Input offset voltage
4. Input offset current
5. Input bias current
6. Gain
VCC=1.8V~6V
optimum for drive by batteries
0.1mA typ.
60dB typ.
-0.2V~+0.3V
±0.1mV typ.
±1µV/°C typ.
1nA typ.
50nA typ.
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
High Precision Operational Amplifier MM1278
MITSUMI
Pin Assignment
MM1278XF, MM1278XD
8
1
7
2
6
3
5
4
SOP-8D/DIP-8A
1
AIN+
2
AIN-
3
AOUT
4
GND
5
BIN+
6
BIN-
7
BOUT
8
VCC
Block Diagram
Absolute Maximum Ratings (Ta=25°C)
Item
Symbol
Rating
Units
Storage temperature
TSTG
-40~+125
°C
Operating temperature
TOPR
-20~+75
°C
Power supply voltage
VCC max.
-0.3~+10
V
Input voltage
VIN
-0.3~+10
V
Allowable power dissipation
Pd
300
mW
High Precision Operational Amplifier MM1278
MITSUMI
Electrical Characteristics
(Unless otherwise specified Ta=25°C, VCC=3V, VIN=0V)
Item
Symbol
Current consumption
ICC
Power supply line elimination ratio
PSRR
Power supply voltage range
Measurement Conditions
Min. Typ. Max. Units
0.1
50
60
VCC
1.8
3.0
Input voltage range
VI
-0.2
Input offset voltage
VIOA
Input offset voltage
temperature drift
VIOA
f=100Hz
0.15
mA
dB
6.0
V
0.3
V
±0.1 ±0.35 mV
Ta=-20~+70°C
±1
±3
µV/°C
Amplifier
Input offset current
IIOA
1
10
nA
section
Input bias current
IBA
50
150
nA
Gain
GV
RL=100kΩ
80
Output current
IOA
VIN=10mV, VO=0.5V
0.5
Output voltage
VOA
VIN=-5~-25mV
RL=10kΩ
0.01
100
dB
mA
VCC
-1.0
V
Note : Use a gain range of 20dB ~ 50dB in the amplifier section (40dB recommended).
Also, insert the capacitor between output and GND, instead of parallel to the gain setting feedback
resistor, in order to eliminate noise from the input.
Please note that use of the equipment under different conditions will cause vibration.