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TS391IYLT
Low power, single voltage comparator
March 2012 Doc ID 6324 Rev 6 1/12
TS391Low-power single voltage comparator
Datasheet − production data
Features Wide single supply voltage range or dual
supplies +2 V to +36 V or ± 1V to ±18V Very low supply current (0.2 mA) independent
of supply voltage (1 mW/comparator at +5V) Low input bias current: 25 nA typ. Low input offset current: ± 5nA typ. Low input offset voltage: ± 1mV typ. Input common-mode voltage range includes
ground Low output saturation voltage: 250 mV typ.
(Io =4 mA) Differential input voltage range equal to the
supply voltage TTL, DTL, ECL, CMOS compatible outputs
DescriptionThis device consists of a low-power voltage
comparator designed specifically to operate from
a single supply over a wide range of voltages.
Operation from split power supplies is also
possible.
This comparator also has a unique characteristic
in that the input common-mode voltage range
includes ground, even though operated from a
single power supply voltage.
Schematic diagram TS3912/12 Doc ID 6324 Rev 6
1 Schematic diagram
Figure 1. Schematic diagram
Figure 2. Pin connections (top view)
TS391 Absolute maximum ratings and operating conditionsDoc ID 6324 Rev 6 3/12
Absolute maximum ratings and operating conditions
Table 1. Absolute maximum ratings (AMR) Short-circuits from the output to VCC+ can cause excessive heating and potential destruction. The
maximum output current is approximately 20 mA independent of the magnitude of VCC+. Short-circuits can cause excessive heating. These 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 package are charged together to the specified voltage and then
discharged directly to ground through only one pin. This is done for all pins.
Table 2. Operating conditions The input common-mode voltage of either input signal voltage should not be allowed to go negative by
more than 0.3 V. The upper end of the common-mode voltage range is VCC+ –1.5 V, but either or both
inputs can go to +30 V without damage.
Electrical characteristics TS3914/12 Doc ID 6324 Rev 6
3 Electrical characteristics Table 3. VCC+ = +5V , VCC- = 0 V, 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 (0 V to
VCC+ -1.5 V). 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 or input lines. 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). The response time specified is for a 100 mV input step with 5 mV overdrive. For larger overdrive signals, 300 ns can be
obtained.
TS391 Electrical characteristicsDoc ID 6324 Rev 6
Figure 3. Supply current vs. supply voltage Figure 4. Response time for various input
overdrives - negative transition
Figure 5. Input current vs. supply voltage Figure 6. Response time for various input
overdrives - positive transition
Figure 7. Output saturation voltage vs.
output current
Package information TS3916/12 Doc ID 6324 Rev 6
4 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.
