MIC6270 Micrel MIC6270 IttyBitty™ Comparator Advance Information General Description Features The MIC6270 is a precision voltage comparator with an offset voltage specification of 5mV maximum. • • • • • • • The MIC6270 is designed to operate from a single 2V to 36V power supply. Operation from split power supplies is also possible. Its low supply current drain is independent of the magnitude of the supply voltage. This comparator also features an input common-mode voltage range that includes ground. Inputs are protected against reverse polarity (input voltage less than V–) and ESD. The MIC6270 has an open-collector output that directly interfaces with TTL, CMOS, and other types of logic. Several MIC6270 outputs can be connected together for wired-OR logic. The output also features an internal pull-up current source that can be used instead of an external load in some applications. 2V to 36V supply 300µA supply current independent of supply 25nA input bias current ±5nA input offset current ±3mV input offset voltage Input common-mode voltage range includes ground Differential input voltage range equal to the power supply voltage • 250mV at 4mA output saturation voltage • Output compatible with TTL, DTL, ECL, MOS, and CMOS logic Applications • • • • • • Limit comparators A/D converters Pulse, square wave, time delay generators Wide range VCO MOS clock timers Multivibrators and high-voltage digital logic gates Ordering Information Pin Configuration IN+ 3 Part Number Temperature Range Package MIC6270BM5 –40°C to +85°C SOT-23-5 Functional Configuration IN+ V– OUT 2 1 3 V– OUT 2 1 Part Identification B10 9 4 5 4 5 IN– V+ IN– V+ SOT-23-5 (M5) SOT-23-5 (M5) Pin Description Pin Number Pin Name 1 OUT 2 V– Negative Supply: Negative supply for split supply application or ground for single supply application. 3 IN+ Noninverting Input: 4 IN– Inverting Input: 5 V+ Positive Supply: October 1998 Pin Function Comparator Output: 9-13 MIC6270 Micrel Absolute Maximum Ratings Operating Ratings Supply Voltage (VV+ – VV–) ............................. 36V or ±18V Differential Input Voltage (VIN+ – VIN–) ....................... ±36V Input Voltage ............................................... –0.3V to +36 V Input Current (VIN < –0.3V) ........................................ 50mA Output Short-Circuit to GND, Note 1 ................................∞ Storage Temperature Range ................... –65°C to +150°C Lead Temperature (soldering, 10 secs.) ................... 260°C Supply Voltage .................................................... 2V to 36V Ambient Temperature Range ..................... –40°C to +85°C SOT-23-5 Thermal Resistance (θJA) ..................... 220°C/W (mounted to printed circuit board) Electrical Characteristics V+ = 5V; TA = 25°C, bold values indicate –40°C ≤ TA ≤ +85°C, TA = TJ; unless noted Symbol Parameter Condition VOS Input Offset Voltage IB Min Typ Max Units Note 2 2 5 9 mV mV Input Bias Current IIN(+) or IIN(–) with output in linear range, VCM = 0V, Note 3 25 250 400 nA nA IOS Input Offset Current IIN(+) – IIN(–), VCM = 0V 5 50 150 nA nA VCM Input Voltage Range V+ = 30V, Note 4 V+ – 1.5 V+ – 2 V V IS Supply Current RL = ∞ RL = ∞, V+ = 36V 0.9 1.2 mA mA Voltage Gain RL ≥ 15kΩ, V+ = 15V VO = 1V to 11V Large Signal Response Time 0 0.3 0.4 200 V/mV VIN = TTL logic swing, VREF = 1.4V VRL = 5V, RL = 5.1kΩ 300 ns Response Time VRL = 5V, RL = 5.1kΩ, Note 5 0.6 µs Output Sink Current VIN(–) = 1V, VIN(+) = 0, VO ≤ 1.5V 20 mA Output Pull-Up Current Saturation Voltage VIN(–) = 1V, VIN(+) = 0, ISINK ≤ 4mA Differential Input Voltage VIN(+), VIN(–) ≥ 0V (or V–, if used), Note 6 50 10 15 50 µA 250 400 700 mV mV 36 V General Note: Devices are ESD protected; however, handling precautions are recommended. Note 1: A short circuit from OUT to V+ can cause excessive heating and damage the device. The maximum short circuit output current (OUT to V–) is approximately 20mA, independent of VV+. Note 2: Measured at the output switch point where VOUT ≅ 1.4Vdc with RS = 0Ω, V+ = 5Vdc to 30Vdc, and over the full input common-mode range (0Vdc to V+ – 1.5Vdc). Note 3: The direction of input current is out of the device due to its PNP input. Note 4: The input common-mode voltage, VIN+, or VIN– must not go below –0.3V. The upper end of the common-mode voltage range is V+ – 1.5V at 25°C, but either or both inputs can go to +36Vdc without damage, independent of of VV+. Note 5: The response time measured using a 100mV input step with 5mV overdrive. With greater overdrive, 300ns can be obtained. See “Typical Characteristics.” Note 6: Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the common-mode range, the comparator will provide a proper output state. The low input voltage state must not be below –0.3Vdc (or 0.3Vdc below VV–). 9-14 October 1998 MIC6270 Micrel Typical Characteristics Supply Current vs. Supply Voltage Input Current vs. Supply Voltage TA = +125°C –55°C 0.3 0.2 RL = ∞ 0.1 0 10 20 30 SUPPLY VOLTAGE (V) VIN(cm) = 0Vdc OUTPUT (V) INPUT (mV) VOUT 0 10 20 30 SUPPLY VOLTAGE (V) 40 1 6 5 4 3 2 1 0 50 -1 INPUT OVERDRIVE = 5mV -100 -150 -100 20mV TA = 25°C 0 100 200 TIME (ns) 300 +125°C 0.01 0.001 0.01 0.1 1 10 100 OUTPUT SINK CURRENT (mA) Output Response Time vs. Overdrive 100mV 0 -50 +25°C 0.1 Output Response Time vs. Overdrive +5V 5.1k –55°C 20 Output Response Time vs. Overdrive (Test Circuit) VIN +25°C 30 10 40 TA = +125°C 40 OUTPUT (V) 0.4 TA = –55°C INPUT (mV) +25°C Output Saturation Voltage 10 SATURATION VOLTAGE (V) 50 INPUT CURRENT (nA) SUPPLY CURRENT (mA) 0.5 400 6 5 4 3 2 1 0 150 -1 INPUT OVERDRIVE = 100mV 5mV 20mV 100 50 TA = 25°C 0 -50 -200 0 200 400 TIME (ns) 600 800 9 October 1998 9-15