LM111-N, LM211-N, LM311-N
SNOSBJ1E – MAY 1999 – REVISED MARCH 2013
LM111-N/LM211-N/LM311-N Voltage Comparator
Check for Samples: LM111-N, LM211-N, LM311-N
•2 Operates From Single 5V Supply
• Input Current: 150 nA Max. Over Temperature
• Offset Current: 20 nA Max. Over Temperature
• Differential Input Voltage Range: ±30V
• Power Consumption: 135 mW at ±15V
The LM111-N, LM211-N and LM311-N are voltage
comparators that have input currents nearly a
thousand times lower than devices like the LM106 or
LM710. They are also designed to operate over a
wider range of supply voltages: from standard ±15V
op amp supplies down to the single 5V supply used
for IC logic. Their output is compatible with RTL, DTL
and TTL as well as MOS circuits. Further, they can
drive lamps or relays, switching voltages up to 50V at
currents as high as 50 mA.
Both the inputs and the outputs of the LM111-N,
LM211-N or the LM311-N can be isolated from
system ground, and the output can drive loads
referred to ground, the positive supply or the negative
supply. Offset balancing and strobe capability are
provided and outputs can be wire OR'ed. Although
slower than the LM106 and LM710 (200 ns response
time vs 40 ns) the devices are also much less prone
to spurious oscillations. The LM111-N has the same
pin configuration as the LM106 and LM710.
The LM211-N is identical to the LM111-N, except that
its performance is specified over a −25°C to +85°C
temperature range instead of −55°C to +125°C. The
LM311-N has a temperature range of 0°C to +70°C.
Pin connections shown in Schematic Diagram and Typical Applications are for the LMC
Figure 1. Offset Balancing
Do Not Ground Strobe Pin. Output is turned off when current is
pulled from Strobe Pin.
Figure 2. Strobing
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