SGM8740YN5G/TR

The SGM8740 is a single high-speed comparator optimized for systems powered from a 3V or 5V supply. The device features high-speed response, low-power consumption, and rail-to-rail input range. Propagation delay is 45ns, while supply current is only 155μA. The input common mode range of the SGM8740 extends beyond both power supply rails. The output pulls to within 0.1V of either supply rail without external pull-up circuitry, making the device ideal for interface with both CMOS and TTL logics. All input and output pins can tolerate a continuous short-circuit fault condition to either rail. Internal hysteresis ensures clean output switching, even with slow-moving input signals. The SGM8740 is available in Green SOT-23-5 and SC70-5 packages. It is rated over the -40°C to +85°C temperature range. The SGM8740 is a single-supply comparator that features internal hysteresis, high speed, and low power. With 4mA output current, its output is pulled to within 200mV of either supply rail without external pull-up or pull-down circuitry. Rail-to-rail input voltage range and low-voltage single-supply operation make the device ideal for portable equipments. The SGM8740 interfaces directly to CMOS and TTL logics. Most high-speed comparators oscillate in the linear region because of noise or undesired parasitic feedback. This tends to occur when the voltage on one input is at or equal to the voltage on the other input. To counter the parasitic effects and noise, the SGM8740 has an internal hysteresis of 2.8mV. The hysteresis in a comparator creates two trip points: one for the rising input voltage and one for the falling input voltage (Figure 1). The difference between the trip points is the hysteresis. The average of the trip points is the offset voltage. When the comparator’s input voltages are equal, the hysteresis effectively causes one comparator input voltage to move quickly past the other, thus taking the input out of the region where oscillation occurs.

Applications

• Line Receivers
• Battery-Powered Systems
• Threshold Detectors/Discriminators
• 3V/5V Systems
• Zero-Crossing Detectors
• Sampling Circuits

Key features

• Fast, 45ns Propagation Delay (10mv Overdrive)
• Low Power Consumption: 155μA (TYP) at Vs = 3V
• Wide Supply Voltage Range: 2.7V to 5.5V Optimized for 3V and 5V Applications
• Rail-to-Rail Input Voltage Range
• Low Offset Voltage: 0.9mV (TYP)
• Internal Hysteresis for Clean Switching
• Output Swing to within 200mV from Rails with 4mA Output Current
• CMOS/TTL-Compatible Output
• -40°C to +85°C Operating Temperature Range
• Available in Green SOT-23-5 and SC70-5 Packages