GENERAL DESCRIPTION
The SA58603 is comprised of a low voltage, high precision dual operational amplifier, a comparator, and a reference voltage source. The input offset voltage is typically 100 µV with a very low temperature drift of ±1 µV/°C. The SA58603 supply current is typically 100 µA per amplifier and it operates from 1.8 V to 6 V single supply.

FEATURES
General
• Functionality to 1.8 V typical
• Low supply current: 100 µA per amplifier (typical)

Amplifier section
• Very low input offset voltage: 100 µV (typical)
• Very low input offset drift: ±1 µV/°C (typical)
• Low input offset current: 1 nA (typical)
• Input bias current: 50 nA (typical)
• Open loop gain: 100 dB (typical)
• Common mode input includes ground

Comparator section
• Input offset voltage: ±1.0 mV (typical)
• Low input offset voltage voltage drift (–40 to +85 °C): ±10 µV (typical)
• Input bias current: 25 nA (typical)
• Output sink current: 5 mA (minimum)

Reference voltage section
• Reference voltage: 1.27 V ±50 mV
• Reference voltage temperature characteristics: ±100 ppm/°C (typical)
• Output current: 0.3 mA (minimum)

APPLICATIONS
• Gas burners
• Gas water heaters
• Tankless gas water heaters