TEXAS INSTRUMENTS A741, A741Y Operation Manual

						A741, A741Y
		GENERAL-PURPOSE OPERATIONAL AMPLIFIERS
		SLOS094B ± NOVEMBER 1970 ± REVISED SEPTEMBER 2000
D	Short-Circuit Protection	A741M . . . J PACKAGE
D Offset-Voltage Null Capability			(TOP VIEW)
D Large Common-Mode and Differential		NC				NC
			1	14
	Voltage Ranges
		NC	2	13		NC
D No Frequency Compensation Required
		OFFSET N1	3	12		NC
	Low Power Consumption
D		IN±	4	11		VCC +
D	No Latch-Up	IN+	5	10		OUT
D Designed to Be Interchangeable With		VCC ±	6	9		OFFSET N2
	Fairchild A741	NC	7	8		NC
description
		A741M . . . JG PACKAGE
		A741C, A741I . . . D, P, OR PW PACKAGE

The A741 is a general-purpose operational amplifier featuring offset-voltage null capability.

The high common-mode input voltage range and the absence of latch-up make the amplifier ideal for voltage-follower applications. The device is short-circuit protected and the internal frequency compensation ensures stability without external components. A low value potentiometer may be connected between the offset null inputs to null out the offset voltage as shown in Figure 2.

(TOP VIEW)

OFFSET N1	1	8	NC
IN±	2	7	VCC+
IN+	3	6	OUT
VCC ±	4	5	OFFSET N2

A741M . . . U PACKAGE

(TOP VIEW)

The A741C is characterized for operation from	NC			1	10		NC
0°C to 70°C. The A741I is characterized for	OFFSET N1			2	9		NC
operation from ±40°C to 85°C.The A741M is	IN±			3	8		VCC +
characterized for operation over the full military	IN+			4	7		OUT
temperature range of ±55°C to 125°C.	VCC ±			5	6		OFFSET N2

symbol		A741M . . . FK PACKAGE
OFFSET N1			(TOP VIEW)
IN +	+	NC	N1
	OUT		OFFSET NC NC NC
IN ±	±
OFFSET N2
	NC	3	2	1	20 19	NC
		4			18
	IN±	5			17	VCC +
	NC	6			16	NC
	IN+	7			15	OUT
	NC	8			14	NC
		9	10 11 12 13
		NC	CC±	NC	N2 NC
			V		OFFSET
	NC ± No internal connection

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Copyright 2000, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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A741, A741Y

GENERAL-PURPOSE OPERATIONAL AMPLIFIERS

SLOS094B ± NOVEMBER 1970 ± REVISED SEPTEMBER 2000

AVAILABLE OPTIONS

				PACKAGED DEVICES					CHIP
		SMALL	CHIP	CERAMIC	CERAMIC	PLASTIC		FLAT
	TA						TSSOP		FORM
		OUTLINE	CARRIER	DIP	DIP	DIP		PACK
							(PW)		(Y)
		(D)	(FK)	(J)	(JG)	(P)		(U)
	0°C to 70°C	A741CD				A741CP	A741CPW		A741Y
	± 40°C to 85°C	A741ID				A741IP
	± 55°C to 125°C		A741MFK	A741MJ	A741MJG			A741MU

The D package is available taped and reeled. Add the suffix R (e.g., A741CDR).

schematic

VCC+

IN ±

OUT

IN+

OFFSET N1

OFFSET N2

VCC ±

Component Count

Transistors 22

Resistors 11

Diode 1

Capacitor 1

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

A741, A741Y

GENERAL-PURPOSE OPERATIONAL AMPLIFIERS

SLOS094B ± NOVEMBER 1970 ± REVISED SEPTEMBER 2000

A741Y chip information

This chip, when properly assembled, displays characteristics similar to the A741C. Thermal compression or ultrasonic bonding may be used on the doped-aluminum bonding pads. Chips may be mounted with conductive epoxy or a gold-silicon preform.

BONDING PAD ASSIGNMENTS

(7) (6)

(8)

45

(5)

(1)

(4)

(2)

(3)

36

					VCC+
IN +	(3)		+				(7)
							(6)
IN ±	(2)		±						OUT
OFFSET N1		(1)					(4)
OFFSET N2		(5)			VCC ±

CHIP THICKNESS: 15 TYPICAL BONDING PADS: 4 × 4 MINIMUM TJmax = 150°C.

TOLERANCES ARE ± 10%.

ALL DIMENSIONS ARE IN MILS.

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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A741, A741Y

GENERAL-PURPOSE OPERATIONAL AMPLIFIERS

SLOS094B ± NOVEMBER 1970 ± REVISED SEPTEMBER 2000

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)²

		A741C	A741I	A741M	UNIT
Supply voltage, VCC+ (see Note 1)		18	22	22	V
Supply voltage, VCC ± (see Note 1)		±18	± 22	± 22	V
Differential input voltage, VID (see Note 2)		±15	±30	±30	V
Input voltage, VI any input (see Notes 1 and 3)		±15	±15	±15	V
Voltage between offset null (either OFFSET N1 or OFFSET N2) and VCC ±		±15	±0.5	±0.5	V
Duration of output short circuit (see Note 4)		unlimited	unlimited	unlimited
Continuous total power dissipation		See Dissipation Rating Table
Operating free-air temperature range, TA		0 to 70	± 40 to 85	± 55 to 125	°C
Storage temperature range		± 65 to 150	± 65 to 150	± 65 to 150	°C
Case temperature for 60 seconds	FK package			260	°C
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds	J, JG, or U package			300	°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds	D, P, or PW package	260	260		°C

²Stresses beyond those listed under ªabsolute maximum ratingsº may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. All voltage values, unless otherwise noted, are with respect to the midpoint between VCC+ and VCC ±.

2.Differential voltages are at IN+ with respect to IN ±.

3.The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15 V, whichever is less.

4.The output may be shorted to ground or either power supply. For the A741M only, the unlimited duration of the short circuit applies at (or below) 125°C case temperature or 75°C free-air temperature.

DISSIPATION RATING TABLE

	PACKAGE	TA ≤ 25°C	DERATING	DERATE	TA = 70°C	TA = 85°C	TA = 125°C
		POWER RATING	FACTOR	ABOVE TA	POWER RATING	POWER RATING	POWER RATING
	D	500 mW	5.8 mW/°C	64°C	464 mW	377 mW	N/A
	FK	500 mW	11.0 mW/°C	105°C	500 mW	500 mW	275 mW
	J	500 mW	11.0 mW/°C	105°C	500 mW	500 mW	275 mW
	JG	500 mW	8.4 mW/°C	90°C	500 mW	500 mW	210 mW
	P	500 mW	N/A	N/A	500 mW	500 mW	N/A
	PW	525 mW	4.2 mW/°C	25°C	336 mW	N/A	N/A
	U	500 mW	5.4 mW/°C	57°C	432 mW	351 mW	135 mW

4	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

A741, A741Y

GENERAL-PURPOSE OPERATIONAL AMPLIFIERS

SLOS094B ± NOVEMBER 1970 ± REVISED SEPTEMBER 2000

electrical characteristics at specified free-air temperature, VCC± = ±15 V (unless otherwise noted)

	PARAMETER	TEST		T ²		µA741C		µA741I, µA741M			UNIT
		CONDITIONS		A	MIN	TYP	MAX	MIN	TYP	MAX
VIO	Input offset voltage	VO = 0		25°C		1	6		1	5	mV
				Full range			7.5			6
VIO(adj)	Offset voltage adjust range	VO = 0		25°C		± 15			± 15		mV
IIO	Input offset current	VO = 0		25°C		20	200		20	200	nA
				Full range			300			500
IIB	Input bias current	VO = 0		25°C		80	500		80	500	nA
				Full range			800			1500
VICR	Common-mode input			25°C	± 12	± 13		± 12	± 13		V
	voltage range			Full range	± 12			± 12
		RL = 10 kΩ		25°C	± 12	± 14		± 12	± 14
VOM	Maximum peak output	RL ≥ 10 kΩ		Full range	± 12			± 12			V
	voltage swing	RL = 2 kΩ		25°C	± 10	± 13		± 10	± 13
		RL ≥ 2 kΩ		Full range	± 10			± 10
AVD	Large-signal differential	RL ≥ 2 kΩ		25°C	20	200		50	200		V/mV
	voltage amplification	VO = ±10 V		Full range	15			25
ri	Input resistance			25°C	0.3	2		0.3	2		MΩ
ro	Output resistance	VO = 0, See Note 5		25°C		75			75		Ω
Ci	Input capacitance			25°C		1.4			1.4		pF
CMRR	Common-mode rejection	VIC = VICRmin		25°C	70	90		70	90		dB
	ratio			Full range	70			70
kSVS	Supply voltage sensitivity	VCC = ± 9 V to ± 15 V		25°C		30	150		30	150	µV/V
	( VIO / VCC)			Full range			150			150
IOS	Short-circuit output current			25°C		± 25	± 40		± 25	± 40	mA
ICC	Supply current	VO = 0,	No load	25°C		1.7	2.8		1.7	2.8	mA
				Full range			3.3			3.3
PD	Total power dissipation	VO = 0,	No load	25°C		50	85		50	85	mW
				Full range			100			100

²All characteristics are measured under open-loop conditions with zero common-mode input voltage unless otherwise specified. Full range for the µA741C is 0°C to 70°C, the µA741I is ± 40°C to 85°C, and the µA741M is ± 55°C to 125°C.

NOTE 5: This typical value applies only at frequencies above a few hundred hertz because of the effects of drift and thermal feedback.

operating characteristics, VCC± = ±15 V, TA = 25°C

	PARAMETER	TEST CONDITIONS					µA741C	µA741I, µA741M		UNIT
						MIN	TYP MAX	MIN TYP	MAX
tr	Rise time	V = 20 mV,	R		= 2 kΩ,		0.3	0.3		µs
		I		L
	Overshoot factor	CL = 100 pF,	See Figure 1				5%	5%
SR	Slew rate at unity gain	VI = 10 V,	RL = 2 kΩ,				0.5	0.5		V/µs
		CL = 100 pF,	See Figure 1

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

5

A741, A741Y

GENERAL-PURPOSE OPERATIONAL AMPLIFIERS

SLOS094B ± NOVEMBER 1970 ± REVISED SEPTEMBER 2000

electrical characteristics at specified free-air temperature, VCC ± = ±15 V, TA = 25°C (unless otherwise noted)

	PARAMETER	TEST CONDITIONS			µA741Y		UNIT
				MIN	TYP	MAX
VIO	Input offset voltage	VO = 0			1	6	mV
VIO(adj)	Offset voltage adjust range	VO = 0			± 15		mV
IIO	Input offset current	VO = 0			20	200	nA
IIB	Input bias current	VO = 0			80	500	nA
VICR	Common-mode input voltage range			± 12	± 13		V
VOM	Maximum peak output voltage swing	RL = 10 kΩ		± 12	± 14		V
		RL = 2 kΩ		± 10	± 13
AVD	Large-signal differential voltage amplification	RL ≥ 2 kΩ		20	200		V/mV
ri	Input resistance			0.3	2		MΩ
ro	Output resistance	VO = 0,	See Note 5		75		Ω
Ci	Input capacitance				1.4		pF
CMRR	Common-mode rejection ratio	VIC = VICRmin		70	90		dB
kSVS	Supply voltage sensitivity ( VIO / VCC)	VCC = ± 9 V to ± 15 V			30	150	µV/V
IOS	Short-circuit output current				± 25	± 40	mA
ICC	Supply current	VO = 0,	No load		1.7	2.8	mA
PD	Total power dissipation	VO = 0,	No load		50	85	mW

² All characteristics are measured under open-loop conditions with zero common-mode voltage unless otherwise specified.

NOTE 5: This typical value applies only at frequencies above a few hundred hertz because of the effects of drift and thermal feedback.

operating characteristics, VCC ± = ±15 V, TA = 25°C

	PARAMETER	TEST CONDITIONS					µA741Y		UNIT
						MIN	TYP	MAX
tr	Rise time	V = 20 mV,	R		= 2 kΩ,		0.3		µs
		I		L
	Overshoot factor	CL = 100 pF,	See Figure 1				5%
SR	Slew rate at unity gain	VI = 10 V,	RL = 2 kΩ,				0.5		V/µs
		CL = 100 pF,	See Figure 1

6	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

A741, A741Y

GENERAL-PURPOSE OPERATIONAL AMPLIFIERS

SLOS094B ± NOVEMBER 1970 ± REVISED SEPTEMBER 2000

PARAMETER MEASUREMENT INFORMATION

VI

±

OUT

IN

+

0 V

INPUT VOLTAGE

WAVEFDORM

CL = 100 pF	RL = 2 kΩ
	TEST CIRCUIT

Figure 1. Rise Time, Overshoot, and Slew Rate

APPLICATION INFORMATION

Figure 2 shows a diagram for an input offset voltage null circuit.

IN +		+							OUT
IN ±		±					OFFSET N2
OFFSET N1
				10 kΩ

To VCC ±

Figure 2. Input Offset Voltage Null Circuit

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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