LC7972VB

Ordering number : EN5682 CMOS LSI LC7972VA, 7972VB CMOS Operational Amplifier with Programmable Offset Correction Function Overview The LC7972VA and LC7972VB are dual inverting/noninverting operational amplifier ICs that are fabricated in a CMOS process. These ICs provide a programmable offset correction function and a power saving function for use when the operational amplifier is unused, both of which can be controlled from a microprocessor interface. The following modes are supported. These are selected via port level settings. Package Dimensions unit: mm 3179A-SSOP20 [LC7972VA, VB] Features High input impedance provided by fabrication in a CMOS process. Low power provided by fabrication in a CMOS process. One of two types of operational amplifier can be selected: inverting (operational amplifier 1) or noninverting (operational amplifier 2) Operating supply voltage: 4.9 to 5.2 V Package: SSOP20 Operating temperature: Ta = –30 to +70°C Port OP1ON Level L H L OP2ON H L OFST1 H L OFST2 CLKC H L Function Operational amplifier 1: Operation stopped (low-power mode) Operational amplifier 1: Normal operation (OP2ON must be low in this mode.) Operational amplifier 2: Operation stopped (low-power mode) Operational amplifier 2: Normal operation (OP1ON must be low in this mode.) Operational amplifier 1: Offset mode (inverting input = VSS) Operational amplifier 1: Operating mode (inverting input = normal input) Operational amplifier 2: Offset mode (noninverting inpu...