TS27L4ACPT STMicroelectronics

TS27L4 Very low power precision CMOS quad operational amplifiers Features Very low power consumption: 10 A/op Output voltage can swing to ground DIP14 Excellent phase margin on capacitive loads (Plastic package) Unity gain stable Two input offset voltage selections SO-14 Description (Plastic micropackage) The TS27L4 series are low-cost, low-power quad operational amplifiers designed to operate with single or dual supplies. These operational amplifiers use the ST silicon gate CMOS process allowing an excellent consumption-speed ratio. TSSOP14 These series are ideally suited for low (Thin shrink small outline package) consumption applications. Three power consumptions are available enabling Pin connections (top view) the best consumption-speed ratio: I = 10 A/amp: TS27L4 (very low power), CC I = 150 A/amp: TS27M4 (low power), CC Output 1 1 14 Output 4 I = 1 mA/amp: TS274 (standard). CC Inverting Input 1 2 13 Inverting Input 4 - - + + Non-inverting Input 1 3 12 Non-inverting Input 4 These CMOS amplifiers offer very high input - impedance and extremely low input currents. The + V CC 4 11 VCC major advantage versus JFET devices is the very Non-inverting Input 2 5 10 Non-inverting Input 3 + + low input current drift with temperature (see - - Inverting Input 2 6 9 Inverting Input 3 Figure 4). Output 2 7 8 Output 3 March 2009 Rev 3 1/15 www.st.com 15Circuit schematics TS27L4 1 Circuit schematics Figure 1. Internal block diagram V CC Current x I Output Input source Second stage differential Output stage V CC E E 2/15