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AS1972 Datasheet(PDF) 2 Page - ams AG |
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AS1972 Datasheet(HTML) 2 Page - ams AG |
2 / 19 page AS1970 - AS1975 Low-Vo ltage Single/Dual/Quad Comparators Dat a Sh eet www.austriamicrosystems.com Revision 1.02 1 - 18 1 General Description The AS1970 - AS1975 are single/dual/quad compara- tors that operate with supplies from 2.5 to 5.5V making them perfect for all 3- and 5-volt applications. The com- parators can also operate with dual supplies (±1.25 to ±2.75V), and require very little supply current (down to 8.5µA) with minimal propagation delay (300ns). Low input bias current (1.0pA, typ), low input offset volt- age (0.5mV, typ), and internal hysteresis (3mV) make these comparators ideal for low-power single-cell appli- cations including power-management and power-moni- toring systems. The comparators are available as the standard products listed in Table 1. The AS1970/AS1972/AS1974 push/pull output can sink or source current. The AS1971/AS1973/AS1975 open-drain output can be pulled beyond VCC to a maximum of 5.5V > VEE. These open-drain versions are ideal for logic-level translators or bipolar-to-unipolar converters. Large internal output drivers allow Rail-to-Rail output swings with loads of up to 8mA. The AS1970/AS1971 are available in a 5-pin SOT23 package. The AS1972/AS1973 are available in a 8-pin MSOP package. The AS1974/AS1975 are available in a 14-pin TSSOP package. Figure 1. Block Diagrams 2 Key Features ! CMOS Push/Pull Output Sinks and Sources 8mA (AS1970/AS1972/AS1974) ! CMOS Open-Drain Output Voltage Extends Beyond VCC (AS1971/AS1973/AS1975) ! Quiescent Supply Current: 8.5µA per Comparator ! Internal Hysteresis: 3mV ! 3V/5V Logic-Level Translation ! Single-Supply Operation: 2.5 to 5.5V ! Common-Mode Input Voltage Range Extends 250mV Above the Rails ! Low Propagation Delay: 300ns ! Minimized Overall Power Consumption ! Supply Current @1MHz Switching Frequency: 80µA ! No Phase Reversal for Overdriven Inputs ! Package Types: - 5-pin SOT23 – AS1970/AS1971 - 8-pin MSOP – AS1972/AS1973 - 14-pin TSSOP – AS1974/AS1975 3 Applications The devices are ideal for battery-powered systems, mobile communication devices, zero-crossing detectors, window comparators, level translators, threshold detec- tors/discriminators, ground/supply-sensing applications, IR receivers or any other space-limited application with low power-consumption requirements. Table 1. Standard Products Model Output Type AS1970/AS1972/AS1974 Push/Pull AS1971/AS1973/AS1975 Open-Drain – + – + – + – + OUTA INA+ INA- VEE VCC OUTD IND+ IND- OUTC INC+ INC- OUTB INB+ INB- AS1974/AS1975 AS1972/AS1973 VEE VCC INA+ INA- – + OUTA INB+ INB- – + OUTB VCC AS1970/AS1971 VEE IN+ IN- – + OUT |
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