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MAX9064 Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX9064 Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 12 page Ultra-Small, Low-Power Single Comparators in 4-Bump UCSP and 5-SOT23 _______________________________________________________________________________________ 7 Detailed Description The MAX9060–MAX9064 are extremely small com- parators ideal for compact, low-current, and low- voltage applications. The MAX9060/MAX9061 consume only 50nA (typ) oper- ating current, while the MAX9062/MAX9063/MAX9064 consume only 400nA (typ). The low-voltage operating capability of the MAX9060–MAX9064 makes these devices extremely attractive to long-life battery-operat- ed devices—these applications can now use a single digital power-supply rail to power the new generation of microcontrollers (which can be down to 0.9V). A single AA/AAA cell can drop down to 0.9V in full discharge. All parts are available in a tiny 4-bump UCSP, that is only 0.6mm tall, and occupies a 1mm x 1mm footprint and a 5-pin SOT23. Input Stage Circuitry Noninverting inputs are available on the MAX9060/ MAX9062/MAX9064 and inverting inputs are available on the MAX9061/MAX9063. The MAX9060–MAX9064 incorporate an innovative input stage architecture that allows their input voltage to exceed VCC by several volts (limited only by the Absolute Maximum Ratings). This is unlike traditional comparators that have an input ESD diode clamp between the input and VCC, limiting this maximum over- voltage to about 0.3V. The MAX9060–MAX9064 archi- tecture maintains a high input impedance to input signals even when the device power-supply voltage is completely turned off (VCC or REF taken to 0V). This greatly benefits flexible power-saving schemes to be easily implemented in advanced battery-operated devices. On-chip filtering provides immunity from any RF noise being picked up by input traces. These devices feature an internal temperature-compensated, low-power 0.2V reference voltage. Output Stage Structure The MAX9060–MAX9063 have open-drain outputs that allow them to interface to logic circuitry running from supply voltages other than the one supplied to the part. These devices require an external pullup resistor or current source for proper operation. Many microcon- troller digital inputs ports can be readily programmed to include these. The MAX9064 has a push-pull output stage that can both sink and source current, eliminating the need for an external pullup resistor. In this case, the MAX9064 uses the microcontroller’s power supply as VCC. Pin Description PIN UCSP SOT23 MAX9060 MAX9061 MAX9062 MAX9063 MAX9064 MAX9060 MAX9061 MAX9062 MAX9063 MAX9064 NAME FUNCTION A1 A1 5 5 OUT Comparator Output. The MAX9060–MAX9063 have open-drain outputs. The MAX9064 has a push-pull output. A2 A2 4 4 IN Comparator Input. The MAX9060, MAX9062, and MAX9064 have noninverting inputs. The MAX9061 and MAX9063 have inverting inputs. —B1 — 1 VCC Power-Supply Voltage. Bypass to ground with a 0.1µF bypass capacitor. B1 — 1 — REF External Reference Input. REF also supplies power to the device. Bypass to ground with a 0.1µF bypass capacitor. B2 B2 2, 3 2, 3 GND Ground. |
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