TS27L4

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