RS8905XM

The RS8905 offers a wide supply range, It is a dual low power comparator witch a typical power supply current of 400nA (per channel), and rail-to-rail inputs. All of these features come in industry-standard and extremely small packages, making this device an excellent choice for low-voltage and low-power applications for portable electronics and industrial systems. Featuring a push-pull output stage, the RS8905 allows for operation with absolute minimum power consumption when driving any capacitive or resistive load. The devices are ideal for system monitoring, include tablets, portable medical, smart phones. The RS8905 is specified at the full temperature range of -40°C to +125°C under single power supplies of 1.4V to 5.5V. The RS8905 devices are double-channel, Nano-power comparators with a push-pull output stage. Operating from 1.4V to 5.5V and consuming only 400nA per channel. The push-pull output of the RS8905 supports railto-rail output swing and interfaces with TTL/CMOS logic. The RS8905 devices are Nano-Power comparators that can operate at low voltages. The RS8905 feature a rail-to-rail input stage capable of operating up to 100mV beyond the VCC power supply rail. The RS8905 has rail-to-rail input common-mode voltage range. It can operate at any differential input voltage within this limit as long as the differential voltage is greater than zero. A differential input of zero volts may result in oscillation. The differential input stage of the comparator is a pair of PMOS and NMOS transistors, therefore, no current flows into the device. The input bias current measured is the leakage current in the MOS transistors and input protection diodes. This low bias current allows the comparator to interface with a variety of circuitry and devices with minimal concern about matching the input resistances. The RS8905 has a MOS push-pull rail-to-rail output stage. The push-pull transistor configuration of the output keeps the total system power consumption to a minimum. The only current consumed by the RS8905 is the less than 1μA supply current and the current going directly into the load. No power is wasted through the pullup resistor when the output is low. The output stage is specifically designed with dead time between the time when one transistor is turned off and the other is turned on (break-before-make) to minimize shoot through currents. The internal logic controls the break-before-make timing of the output transistors. The break-before-make delay varies with temperature and power condition. Even though the RS8905 uses less than 1μA supply current, the outputs are able to drive very large currents. The RS8905 can source up to 38mA and can sink up to 42mA, when operated at 5V supply. This large current handling capability allows driving heavy loads directly. The RS8905 is an ultra-low-power comparator with a typical power supply current of 400nA per channel. It has the best-in class power supply current versus propagation delay. The propagation delay is as low as 9μs with 100mV overdrive at 1.4V supply.

Applications

• OVERVOLTAGE AND UNDERVOLTAGE DETECTION
• MULTIVIBRATORS
• OVERCURRENT DETECTION
• SYSTEM MONITORING BATTERY POWERED SYSTEM

Key features

• Low supply current 400nA (TYP) at Vs = 1.4V
• Low input offset voltage: Vos(max) = ±3mV
• Rail-to-Rail Input and output
• SUPPLY RANGE: +1.4V to +5.5V
• SPECIFIED UP TO ±125°C
• Micro SIZE PACKAGES: SOIC-8(SOP8), MSOP-8