LM56CIMMX datasheet(11/21 Pages) TI

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LM56CIMMX Datasheet(PDF) 11 Page - Texas Instruments

Part #	LM56CIMMX

Description	LM56 Dual Output Low Power Thermostat

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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11 / 21 page

LM56

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SNIS120G – APRIL 2000 – REVISED FEBRUARY 2013

VREF AND VTEMP CAPACITIVE LOADING

Figure 16. Loading of VREF and VTEMP

The LM56 VREF and VTEMP outputs handle capacitive loading well. Without any special precautions, these outputs

can drive any capacitive load as shown in Figure 16.

NOISY ENVIRONMENTS

Over the specified temperature range the LM56 VTEMPoutput 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+ to GND to bypass the power supply voltage, as shown in Figure 16.

In a noisy environment it may be necessary to add a capacitor from the VTEMP output to ground. A 1 μF output

capacitor with the 1500

Ω output impedance will form a 106 Hz lowpass filter. Since the thermal time constant of

the VTEMP output is much slower than the 9.4 ms time constant formed by the RC, the overall response time of

the VTEMP output will not be significantly affected. For much larger capacitors this additional time lag will increase

the overall response time of the LM56.

APPLICATIONS CIRCUITS

Figure 17. Reducing Errors Caused by Bias Current

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Product Folder Links: LM56

Manufacturer	Part #	Datasheet	Description
National Semiconductor ...	LM56CIMMX	370Kb / 13P	Dual Output Low Power Thermostat
National Semiconductor ...	LM56CIMMX	791Kb / 13P	Dual Output Low Power Thermostat
Texas Instruments	LM56CIMMX/NOPB	1Mb / 22P	[Old version datasheet] Dual Output Low Power Thermostat

Manufacturer	Part #	Datasheet	Description
Texas Instruments	LM56	1Mb / 22P	[Old version datasheet] LM56 Dual Output Low Power Thermostat
Texas Instruments	LM56	1Mb / 22P	[Old version datasheet] Dual Output Low Power Thermostat
National Semiconductor ...	LM56	791Kb / 13P	Dual Output Low Power Thermostat
	LM56	370Kb / 13P	Dual Output Low Power Thermostat
	LM66	62Kb / 5P	Dual Output Internally Preset Thermostat
ELM Electronics	ELM341	28Kb / 4P	LOW POWER THERMOSTAT
Rohm	BDJ0800AHFV	1Mb / 16P	Temperature Sensor IC Low Current Thermostat Output
	BDJ0700AHFV	1Mb / 16P	Temperature Sensor IC Low Current Thermostat Output
	BDJ0601HFV	270Kb / 10P	Low current Thermostat Output Temperature Sensor ICs
	BDJ0550HFV	255Kb / 10P	Low current Thermostat Output Temperature Sensor ICs

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