ST LM2903H User Manual

LM2903H

Low-power dual voltage comparator

Features

■Wide single supply voltage range or dual supplies +2 V to +36 V or ±1 V to ±18 V

■Very low supply current (0.4 mA) independent of supply voltage (1 mW/comparator at +5 V)

■Low input bias current: 25 nA typ.

■Low input offset current: ±5 nA 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, MOS, CMOS compatible outputs

Description

This device consists of two independent low power voltage comparators 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 ground even though operated from a single power supply voltage.

Datasheet − production data

SO-8

(Plastic micropackage)

Wafer form

Pin connections

(top view)

March 2012

Doc ID 9875 Rev 4

1/10

This is information on a product in full production.

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Absolute maximum ratings and operating conditions	LM2903H

1 Absolute maximum ratings and operating conditions

Table 1.	Absolute maximum ratings (AMR)
Symbol	Parameter	Value	Unit
VCC	Supply voltage	±18 or 36	V
Vid	Differential input voltage	±36	V
Vin	Input voltage	-0.3 to +36	V
	Output short-circuit to ground (1)	20	mA
Rthja	Thermal resistance junction to ambient (2)	125	°C/W
	(SO-8)
Rthjc	Thermal resistance junction to case (2)	40	°C/W
	(SO-8)
Tj	Maximum junction temperature	160	°C
	HBM: human body model (3)	800
ESD	MM: machine model (4)	200	V
	CDM: charged device model (5)	1500
Tstg	Storage temperature range	-65 to +150	°C

1.Short-circuit 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+.

2.Short-circuits can cause excessive heating and destructive dissipation. Values are typical.

3.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.

4.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.

5.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
	Symbol		Parameter	Value	Unit
	+	Supply voltage		2 to 36	V
	VCC
	Toper	Operating free-air temperature range		-40 to +150	°C
		Input common mode voltage range (VCC = 30 V)(1)		+
				0 to V -1.5
	Vicm	T	= +25°C	CC	V
				0 to VCC+-2
		amb	≤ Tamb ≤ Tmax
		Tmin

1.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.

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LM2903H	Circuit schematics

2 Circuit schematics

Figure 1. Schematic diagram (1/2 LM2903)

VCC+

3.5µA		100µA		3.5µA				100µA

Non-Inverting

Input

Vo

VCCVCC-

Inverting

Input

VCC-

Figure 2. Pad locations

OUT 2	year	E- (2)		E+ (2)

Vcc +		GND

y

OUT 1	Die id.	E- (1)		E+ (1)

x

Name	Pad placement		Pad dimensions
	X	Y	X	Y
GND	830	415	90	90
E+1	750	100	90	90
E-1	400	100	90	90
OUT1	100	100	90	90
Vcc +	65	415	90	90
OUT2	90	730	90	90
E-2	410	720	90	90
E+2	760	720	90	90

All dimensions are specified in micrometer (um).

Doc ID 9875 Rev 4

3/10