Outline

This IC is comprised of an operation amplifier, a comparator, and a reference power source. It is worthy of note that the input offset voltage and the input offset voltage temperature drift of this operation amplifier are one digit less than those of conventional products regardless of the single power supply. Formerly, offset voltage adjustment was required for flame detection using a thermocouple on gas appliances, but with this IC adjustment is not required.

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 (single batteries) VCC=1.8V~6V (It is available to operate by two dry cell batteries.)

2. Current consumption 0.1mA typ.

3. Power supply line elimination ratio 60dB typ.

Amplifier section

1. Low input offset voltage ±0.1mV typ.

2. Low input offset voltage drift (-20°C~+75°C) ±1.0µV/°C typ.

3. Input offset current 1nA typ.

4. Input bias current 50nA typ.

5. Gain (Open roop) 100dB typ.

Comparator Section

1. Input offset voltage ±1.0mV typ.

2. Low input offset voltage drift (-20°C~+75°C) ±10µV/°C typ.

3. Input bias current ±25nA typ.

4. Output sink current 5mA min.

Reference Voltage Section

1. Reference voltag 1.27V±0.05V

2. Reference voltage temperature characteristics ±100ppm/°C typ.

3. Output current 0.3mA min.

Applications

1. Gas burners

2. Instantaneous gas water heaters