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LM2901YDT-LM2901YPT
Low power quad voltage comparator
February 2012 Doc ID 2468 Rev 7 1/17
LM2901Low-power quad voltage comparator
Features Wide single supply voltage range or dual
supplies for all devices: +2 V to +36 V or ±1V
to ±18V Very low supply current (1.1 mA) independent
of supply voltage (1.4 mW/comparator at +5V) Low input bias current: 25 nA typ. Low input offset current: ±5 nA typ. Input common-mode voltage range includes
negative rail Low output saturation voltage:
250 mV typ. (IO = 4 mA) Differential input voltage range equal to the
supply voltage TTL, DTL, ECL, MOS, CMOS compatible
outputs
DescriptionThis device consists of four independent precision
voltage comparators, which are 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 the negative rail even
though operated from a single power supply
voltage.
Pin connection and schematic diagram LM29012/17 Doc ID 2468 Rev 7
Pin connection and schematic diagram
Figure 1. Pin connections (top view)
Figure 2. Schematic diagram
LM2901 Absolute maximum ratings and operating conditionsDoc ID 2468 Rev 7 3/17
Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings Short-circuits from the output to VCC+ can cause excessive heating and eventual destruction. The
maximum output current is approximately 20 mA, independent of the magnitude of VCC+. Short-circuits can cause excessive heating. Destructive dissipation can result from simultaneous short-
circuits on all amplifiers. All values are typical. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a
1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating. Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5 Ω). This is done for all couples of
connected pin combinations while the other pins are floating. Charged device model: all pins and the package are charged together to the specified voltage and then
discharged directly to the ground through only one pin. This is done for all pins.
Table 2. Operating conditions
Electrical characteristics LM29014/17 Doc ID 2468 Rev 7
3 Electrical characteristics Table 3. Electrical characteristics at VCC+ = 5 V, VCC- = GND, Tamb = 25°C
(unless otherwise specified) At output switch point, VO ≈ 1.4 V, RS = 0 with VCC+ from 5 V to 30 V, and over the full input common-
mode range (0 V 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 there is no loading charge on the reference of input
lines. The response time specified is for a 100 mV input step with 5 mV overdrive. 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 –0.3 V (or 0.3 V below the negative power supply, if used). Maximum values are guaranteed by design.
LM2901 Electrical characteristicsDoc ID 2468 Rev 7 5/17
Figure 3. Supply current vs. supply voltage Figure 4. Input current vs. supply voltage
Typical application schematics LM29016/17 Doc ID 2468 Rev 7
Typical application schematics
Figure 8. Basic comparator Figure 9. Driving CMOS
Figure 10. Driving TTL Figure 11. Low frequency op-amp
Figure 12. Low frequency op-amp with boost Figure 13. Transducer amplifier
LM2901 Typical application schematicsDoc ID 2468 Rev 7 7/17
Figure 14. Low frequency op-amp with
offset adjust
Figure 15. Zero crossing detector (single
power supply)
Figure 16. Limit comparator Figure 17. Split-supply applications - zero
crossing detector
Figure 18. Crystal controlled oscillator Figure 19. Comparator with a negative
reference
Typical application schematics LM29018/17 Doc ID 2468 Rev 7
Figure 20. Time delay generator
Figure 21. Two-decade high-frequency VCO
LM2901 Package informationDoc ID 2468 Rev 7 9/17
5 Package informationIn order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOP ACK®
specifications, grade definitions and product status are available at: .
ECOPACK® is an ST trademark.
