ST LM148, LM248, LM348 Operation Manual

LM148

LM248

LM348

FOUR UA741 QUAD BIPOLAR OPERATIONAL AMPLIFIERS

■LOW SUPPLY CURRENT: 0.53mA/AMPLIFIER

■CLASS AB OUTPUT STAGE: NO CROSS OVER DISTORTION

■PIN COMPATIBLE WITH LM124

■LOW INPUT OFFSET VOLTAGE: 1mV

■LOW INPUT OFFSET CURRENT: 2nA

■LOW INPUT BIAS CURRENT: 30nA

■GAIN BANDWIDTH PRODUCT: 1.3MHz

■HIGH DEGREE OF ISOLATION BETWEEN AMPLIFIERS: 120dB

■OVERLOAD PROTECTION FOR INPUTS AND OUTPUTS

DESCRIPTION

The LM148 consists of four independent, high gain internally compensated, low power operational amplifiers which have been designed to provide functional characteristics identical to those of the familiar UA741 operational amplifier. In addition the total supply current for all four amplifiers is compatible to the supply current of a single UA741 type op amp. Other features include input offset current and input bias current which are much less than those of a standard UA741. Also, excellent isolation between amplifiers has been achieved by independently biasing each amplifier and using layout techniques qhich minimize thermal coupling.

The LM148 can be used anywhere multiple UA741 type amplifiers are being used and in applications where amplifier matching or high packaing density is required.

ORDER CODE

Part	Temperature			Package
Number	Range		N		D
LM148	-55°C, +125°C		∙		∙
LM248	-40°C, +105°C		∙		∙
LM348	0°C, +70°C		∙		∙

Example : LM348D

N = Dual in Line Package (DIP)

D = Small Outline Package (SO) - also available in Tape & Reel (DT)

N

DIP14

(Plastic Package)

D

SO14

(Plastic Micropackage)

PIN CONNECTIONS (top view)

Output 1	1			14	Output 4
Inverting Input 1	2	-	-	13	Inverting Input 4
Non-inverting Input 1	3	+	+	12	Non-inverting Input 4
VCC +	4			11	VCC -
Non-inverting Input 2	5	+	+	10	Non-inverting Input 3
Inverting Input 2	6	-	-	9	Inverting Input 3
Output 2	7			8	Output 3

March 2002

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LM148-LM248-LM348

SCHEMATIC DIAGRAM

		Vcc+
		25Ω
		Inverting
		input
Non-inverting input		Output
		350kΩ
	Vcc+	7.4pF
		2.5kΩ
		Vcc+
		60Ω
		340Ω
		60kΩ
		36kΩ
		Vcc-

ABSOLUTE MAXIMUM RATINGS

Symbol	Parameter	LM148	LM248	LM348	Unit
VCC	Supply voltage		±22		V
Vi	Input Voltage 1)		±22		V
Vid	Differential Input Voltage		±44		V
	Output Short-circuit Duration 2)		Infinite
Ptot	Power Dissipation		500		mW
Toper	Operating Free-air Temperature Range	-55 to +125	-40 to +105	0 to +70	°C
Tstg	Storage Temperature Range		-65 to +150		°C

1.For supply voltage less than maximum value, the absolute maximum input voltage is equal to the supply voltage.

2.Any of the amplifier outputs can be shorted to ground indefinitly; however more than one should not be simultaneously shorted as the maximum junction will be exceeded.

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