LM56BIMM National Semiconductor, LM56BIMM Datasheet - Page 10

• Manufacturer Part Number: LM56BIMM
• Description: IC, LOW POWER THERMOSTAT, ± 2°C, MSOP-8
• Manufacturer: National Semiconductor

Specifications of LM56BIMM

• Ic Output Type: Digital
• Sensing Accuracy Range: ± 2°C
• Supply Current: 230µA
• Supply Voltage Range: 2.7V To 10V
• Sensor Case Style: MSOP
• No. Of Pins: 8
• Termination Type: SMD
• Filter Terminals: SMD
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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4.0 V
The LM56 V
well. Without any special precautions, these outputs can drive
any capacitive load as shown in
5.0 NOISY ENVIRONMENTS
Over the specified temperature range the LM56 V
has a maximum output impedance of 1500Ω. In an extremely
noisy environment it may be necessary to add some filtering
to minimize noise pickup. It is recommended that 0.1 μF be
added from V
as shown in
essary to add a capacitor from the V
1 μF output capacitor with the 1500Ω output impedance will
The circuit shown in
current error for V
alent to the error term of V
REF
AND V
REF
Figure 4
+
to GND to bypass the power supply voltage,
and V
TEMP
T2
as discussed in Section 3.0 to be equiv-
CAPACITIVE LOADING
. In a noisy environment it may be nec-
Figure 5
TEMP
T1
outputs handle capacitive loading
. For this circuit the effect of the
will reduce the effective bias
Figure 4
TEMP
FIGURE 5. Reducing Errors Caused by Bias Current
output to ground. A
.
FIGURE 4. Loading of V
TEMP
output
10
form a 106 Hz lowpass filter. Since the thermal time constant
of the V
stant formed by the RC, the overall response time of the
V
capacitors this additional time lag will increase the overall re-
sponse time of the LM56.
6.0 APPLICATIONS CIRCUITS
bias current on the first trip point can be defined by the fol-
lowing equations:
TEMP
REF
and V
output will not be significantly affected. For much larger
TEMP
TEMP
output is much slower than the 9.4 ms time con-
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