MM1217

This IC contains an operational amplifier and a comparator, achieving extremely low offset voltage with a single power supply. Since a single power supply can be used, this IC can be operated with the voltage from two batteries. Through the use of the operational amplifier and the comparator, this IC can amplify thermocouple electromotive force and detect ignition according to output from the amplifier, without using other parts. The low offset voltage improves accuracy of ignition detection.

Outline

1.Equipment requiring flame detection, such as gas stoves and water heaters
2.Amplification and detection of very low voltage
（Unless otherwise specified, Topr = +25℃）
General
1.Power supply voltage........................1.8 to 6.0 V (Suitable for battery-powered devices)
2.Current consumption.........................0.1 mA Typ.
3.Power supply line rejection ratio (PSRR）...60 dB Typ.

Amplifier section
1.Input voltage range.........................-0.2 to 0.3 V
2.Input offset voltage........................±0.1 mV Typ.
3.Gain........................................100 dB Typ.

Comparator section
1.Input voltage range.........................0 to VCC-1.0 V
2.Input offset voltage........................±0.1 mV Typ.