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MIC6270
Micrel
MIC6270
IttyBittyTM Comparator Advance Information
General Description
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.
Features
2V to 36V supply 300A 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
Part Number MIC6270BM5 Temperature Range -40C to +85C Package SOT-23-5
Pin Configuration
IN+
3
Functional Configuration
V- OUT
2 1
IN+
3
V- OUT
2 1
B10
4 5
Part Identification
4 5
9
V+ IN- V+
IN-
SOT-23-5 (M5)
SOT-23-5 (M5)
Pin Description
Pin Number 1 2 3 4 5 Pin Name OUT V- IN+ IN- V+ Pin Function Comparator Output: Negative Supply: Negative supply for split supply application or ground for single supply application. Noninverting Input: Inverting Input: Positive Supply:
October 1998
9-13
MIC6270
Micrel
Absolute Maximum 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 ................... -65C to +150C Lead Temperature (soldering, 10 secs.) ................... 260C
Operating Ratings
Supply Voltage .................................................... 2V to 36V Ambient Temperature Range ..................... -40C to +85C SOT-23-5 Thermal Resistance (JA) ..................... 220C/W (mounted to printed circuit board)
Electrical Characteristics
V+ = 5V; TA = 25C, bold values indicate -40C TA +85C, TA = TJ; unless noted Symbol VOS IB IOS VCM IS Parameter Input Offset Voltage Input Bias Current Input Offset Current Input Voltage Range Supply Current Voltage Gain Large Signal Response Time Response Time Output Sink Current Output Pull-Up Current Saturation Voltage Differential Input Voltage VIN(-) = 1V, VIN(+) = 0, ISINK 4mA VIN(+), VIN(-) 0V (or V-, if used), Note 6 Condition Note 2 IIN(+) or IIN(-) with output in linear range, VCM = 0V, Note 3 IIN(+) - IIN(-), VCM = 0V V+ = 30V, Note 4 RL = RL = , V+ = 36V RL 15k, V+ = 15V VO = 1V to 11V VIN = TTL logic swing, VREF = 1.4V VRL = 5V, RL = 5.1k VRL = 5V, RL = 5.1k, Note 5 VIN(-) = 1V, VIN(+) = 0, VO 1.5V 10 50 0 0.3 0.4 200 300 0.6 20 15 250 50 400 700 36 Min Typ 2 25 5 Max 5 9 250 400 50 150 V+ - 1.5 V+ - 2 0.9 1.2 Units mV mV nA nA nA nA V V mA mA V/mV ns s mA A mV mV V
General Note: Devices are ESD protected; however, handling precautions are recommended. Note 1: Note 2: Note 3: Note 4: Note 5: Note 6: 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+. Measured at the output switch point where VOUT 1.4Vdc with RS = 0, V+ = 5Vdc to 30Vdc, and over the full input common-mode range (0Vdc to V+ - 1.5Vdc). The direction of input current is out of the device due to its PNP input. 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 25C, but either or both inputs can go to +36Vdc without damage, independent of of VV+. The response time measured using a 100mV input step with 5mV overdrive. With greater overdrive, 300ns can be obtained. See "Typical Characteristics." 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
0.5 SUPPLY CURRENT (mA) TA = +125C INPUT CURRENT (nA) +25C 0.4 -55C 0.3 50 TA = +125C SATURATION VOLTAGE (V)
Input Current vs. Supply Voltage
10
Output Saturation Voltage
TA = -55C
40
1
+25C
30
+25C
0.1
+125C
0.2 RL = 0.1 0 10 20 30 SUPPLY VOLTAGE (V) 40
20
-55C VIN(cm) = 0Vdc
0.01
10
0
10 20 30 SUPPLY VOLTAGE (V)
40
0.001 0.01 0.1 1 10 100 OUTPUT SINK CURRENT (mA)
Output Response Time vs. Overdrive (Test Circuit) +5V
OUTPUT (V) 6 5 4 3 2 1 0 50 -1 0 -50
Output Response Time vs. Overdrive
INPUT OVERDRIVE = 5mV 100mV 6 5 4 3 2 1 0 150 -1 100 50 0 OUTPUT (V)
Output Response Time vs. Overdrive
INPUT OVERDRIVE = 100mV
5mV 20mV
VIN
5.1k VOUT
20mV
INPUT (mV)
INPUT (mV)
TA = 25C 0 100 200 TIME (ns) 300 400
TA = 25C
-100 -150 -100
-50 -200
0
200 400 TIME (ns)
600
800
9
October 1998
9-15

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