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LM2903HD
LOW POWER DUAL VOLTAGE COMPARATORS
1/5 WIDE SINGLE SUPPLY VOLTAGE RANGE
OR DUAL SUPPLIES +2V TO +36V OR ±1V
TO ±18V VERY LOW SUPPLY CURRENT (0.4mA)
INDEPENDENT OF SUPPLY VOLTAGE
(1mW/comparator at +5V) LOW INPUT BIAS CURRENT: 25nA TYP LOW INPUT OFFSET CURRENT: ±5nA TYP INPUT COMMON-MODE VOLTAGE RANGE
INCLUDES GROUND LOW OUTPUT SATURATION VOLTAGE:
250mV TYP. (IO = 4mA) DIFFERENTIAL INPUT VOLTAGE RANGE
EQUAL TO THE SUPPLY VOLTAGE TTL, DTL, ECL, MOS, CMOS COMPATIBLE
OUTPUTS
DESCRIPTION This device consists of two independent low
power voltage comparators designed specifically
to operate from a single supply over a wide range
of voltages. Operation from split power supplies is
also possible.
These comparators also have a unique
characteristic in that the input common-mode
voltage range includes ground even though
operated from a single power supply voltage.
ORDER CODE
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
LM2903HLOW POWER DUAL VOLTAGE COMPARATORS
September 2003
LM2903H2/5
SCHEMATIC DIAGRAM (1/2 LM2903)
PAD LOCATIONS
ABSOLUTE MAXIMUM RATINGS Short-circuit from the output to Vcc+ can cause excessive heating and eventual destruction. The maximum output current is approximately 20mA,
independent of the magnitude of Vcc+ Pd is calculated with Tamb = +25°C, TJunction = +150°C and Rthja = 175°C/W for SO8 package
LM2903H3/5
OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICSCC+ = 5V, Vcc- = GND, Tamb = 25°C (unless otherwise specified) At output switch point, VO ≈ 1.4V, RS = 0Ω with VCC+ from 5V to 30V, and over the full input common-mode range (0V to VCC+ –1.5V). The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant, independent of the state of the
output, so no loading charge exists on the reference of input lines The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3V. The upper end of the
common-mode voltage range is VCC + –1.5V, but either or both inputs can go to +30V without damage. 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 less than –0.3V (or 0.3V below the negative power supply, if used) The response time specified is for a 100mV input step with 5mV overdrive. Maximum values are guaranteed by design & evaluation.
LM2903H4/5
SUPPLY CURRENT versus SUPPLY VOLTAGE
INPUT CURRENT versus SUPPLY VOLTAGE
OUTPUT SATURATION VOLTAGE versus
OUTPUT CURRENT (Vcc=5V)
RESPONSE TIME FOR VARIOUS INPUT
OVERDRIVES - NEGATIVE TRANSITION
RESPONSE TIME FOR VARIOUS INPUT
OVERDRIVES - POSITIVE TRANSITION
LM2903H5/5
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its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
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