ANALOG DEVICES OP777, OP727, OP747 Service Manual

a Precision Micropower

Single-Supply Operational Amplifiers

OP777/OP727/OP747

FEATURES

FUNCTIONAL BLOCK DIAGRAMS

Low Offset Voltage: 100 V Max

8-Lead MSOP

14-Lead SOIC

Low Input Bias Current: 10 nA Max

(RM-8)

(R-14)

Single-Supply Operation: 2.7 V to 30 V

Dual-Supply Operation: 1.35 V to 15 V

Low Supply Current: 300 A/Amp Max

NC

1

8

NC

OUT A

OUT D

IN

OP777

V+

1

14

Unity Gain Stable

No Phase Reversal

IN

OUT

–IN A

2

13

–IN D

V

4

5

NC

IN A

IN D

APPLICATIONS

NC = NO CONNECT

3

OP747

12

V

V–

4

TOP VIEW

11

Current Sensing (Shunt)

IN B

(Not to Scale)

IN C

8-Lead SOIC

5

10

Line or Battery-Powered Instrumentation

–IN B

–IN C

(R-8)

6

9

Remote Sensors

OUT B

7

8

OUT C

Precision Filters

OP727 SOIC Pin-Compatible with LT1013

NC

NC

1

OP777

8

14-Lead TSSOP

IN

V+

GENERAL DESCRIPTION

2

7

+IN

OUT

(RU-14)

The OP777 , OP727 , and OP747 are precision single , dual,

3

6

V

NC

and quad rail-to-rail output singlesupply amplifiers featuring

4

5

micropower operation and rail-to-rail output ranges.

These

NC = NO CONNECT

OUT A

1

14

OUT D

amplifier sprovideimprovedperformanceovertheindustry

-standard

–IN A

–IN D

2

13

OP07 with ±15 V supplies , and offer the further advantage of true

8-Lead TSSOP

IN A

IN D

3

OP747

12

single -supply operation down to 2.7 V , and smaller package

(RU-8)

V

4

11

V–

options than any other high-voltage precision bipolar amplifier.

TOP VIEW

IN B

(Not to Scale)

IN C

5

10

Outputs are stable with capacitive loads of over 500 pF. Supply

–IN B

–IN C

6

9

amplifier at 5 V. 500 series resis-

OUT A

1

8

V

currentis lessthan300 µA per Ω

MacshbM·“‘

tors protect the inputs, allowing input signal levels several volts above

–IN A

OP727

OUT B

OUT B

7

8

OUT C

2

7

the positive supply without phase reversal.

IN A

TOP VIEW

–IN B

3

(Not to Scale)

6

Applications for these amplifiers include both line-powered and

V–

IN B

4

5

portable instrumentation, remote sensor signal conditioning, and

precision filters.

8-Lead SOIC

The OP777, OP727, and OP747 are specified over the extended

(R-8)

industrial (–40°C to +85°C) temperature range. The OP777,

single, is available in 8-lead MSOP and 8-lead SOIC packages.

IN A

–IN A

The OP747, quad, is available in 14-lead TSSOP and narrow

1

8

V–

OP727

OUT A

14-lead SO packages.Surface-mountdevicesinTSSOPand MSOP

2

7

IN B

TOP VIEW

packages are available in tape and reel only.

3

(Not to Scale)

6

V

–IN B

OUT B

The OP727, dual, is available in 8-lead TSSOP and 8-lead

4

5

SOIC packages. The OP727 8-lead SOIC pin configuration

NOTE: THIS PIN CONFIGURATION DIFFERS

differs from the standard 8-lead operational amplifier pinout.

FROM THE STANDARD 8-LEAD

OPERATIONAL AMPLIFIER PINOUT.

REV. C

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: [phone]	www.analog.com
Fax: [phone]	© Analog Devices, Inc., 2001

OP777/OP727/OP747–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS (@ VS = 5.0 V, VCM = 2.5 V, TA = 25 C unless otherwise noted.)

Parameter		Symbol	Conditions	Min	Typ	Max	Unit
INPUTCHARACTERISTICS							µV
Offset Voltage OP777		VOS	+25 C < T A < +85 C		20	100
			–40°C < T A < +85 °C		50	200	µV
Offset Voltage OP727/OP747			+25 C < T A < +85 C		30	160	µV
			–40°C < T A < +85 °C		60	300	µV
Input Bias Current		IB	–40°C < T A < +85 °C		5.5	11	nA
Input Offset Current		IOS	–40°C < T A < +85 °C		0.1	2	nA
Input Voltage Range				0		4	V
Common-ModeRejectionRatio		CMRR	VCM = 0 V to 4 V	104	110		dB
Large Signal Voltage Gain		AVO	RL = 10 k Ω , VO = 0.5 V to 4.5 V	300	500		V/mV
Offset Voltage Drift OP777		∆VOS/∆T	–40°C < T A < +85 °C		0.3	1.3	µV/°C
Offset Voltage Drift OP727/OP747		∆VOS/∆T	–40°C < T A < +85 °C		0.4	1.5	µV/°C
OUTPUTCHARACTERISTICS			IL = 1 mA, –40 °C to +85 °C
Output Voltage High		VOH		4.88	4.91		V
Output Voltage Low		VOL	IL = 1 mA, –40 °C to +85 °C		126	140	mV
Output Circuit		IOUT	VDROPOUT < 1 V		±10		mA
POWERSUPPLY
PowerSupplyRejection Ratio		PSRR	VS = 3 V to 30 V	120	130		dB
SupplyCurrent/AmplifierOP777		ISY	VO = 0 V		220	270	µA
			–40°C < T A < +85 °C		270	320	µA
SupplyCurrent/AmplifierOP727/OP747			VO = 0 V		235	290	µA
			–40°C < T A < +85 °C		290	350	µA
DYNAMIC PERFORMANCE			RL = 2 k Ω				V/µs
Slew Rate		SR			0.2
NOISE PERFORMANCE			MacshbM·“‘
GainBandwidthProduct		GBP			0.7		MHz
VoltageNoise		enp-p	0.1 Hz to 10 Hz		0.4		µV p-p
Voltage Noise Density		en	f = 1 kHz		15		nV/√Hz
Current Noise Density		in	f = 1 kHz		0.13		pA/√Hz

NOTES

Typical specifications: >50% of units perform equal to or better than the “typical” value.

Specifications subject to change without notice.

–2–

REV. C

OP777/OP727/OP747

ELECTRICAL CHARACTERISTICS (@ 15 V, VCM = 0 V, TA = 25 C unless otherwise noted.)

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
INPUTCHARACTERISTICS		+25 °C < T A < +85 °C				µV
Offset Voltage OP777	VOS			30	100
		–40°C < T A < +85 °C		50	200	µV
Offset Voltage OP727/OP747	VOS	+25 °C < T A < +85 °C		30	160	µV
		–40°C < T A < +85 °C		50	300	µV
Input Bias Current	IB	–40°C < T A < +85 °C		5	10	nA
Input Offset Current	IOS	–40°C < T A < +85 °C		0.1	2	nA
Input Voltage Range			–15		+14	V
Common-ModeRejectionRatio	CMRR	VCM = –15 V to +14 V	110	120		dB
Large Signal Voltage Gain	AVO	RL = 10 k Ω , VO = –14.5 V to +14.5 V	1,000	2,500		V/mV
Offset Voltage Drift OP777	∆VOS/∆T	–40°C < T A < +85 °C		0.3	1.3	µV/°C
Offset Voltage Drift OP727/OP747	∆VOS/∆T	–40°C < T A < +85 °C		0.4	1.5	µV/°C
OUTPUTCHARACTERISTICS		IL = 1 mA, –40 °C to +85 °C
Output Voltage High	VOH		+14.9	+14.94		V
Output Voltage Low	VOL	IL = 1 mA, –40 °C to +85 °C		–14.94	–14.9	V
Output Circuit	IOUT			±30		mA
POWERSUPPLY		VS = ± 1.5 V to ± 15 V
PowerSupply RejectionRatio	PSRR		120	130		dB
SupplyCurrent/AmplifierOP777	ISY	VO = 0 V		300	350	µA
		–40°C < T A < +85 °C		350	400	µA
SupplyCurrent/AmplifierOP727/747		VO = 0 V		320	375	µA
		–40°C < T A < +85 °C		375	450	µA
DYNAMIC PERFORMANCE		RL = 2 k Ω				V/µ
Slew Rate	SR			0.2
NOISE PERFORMANCE		MacshbM·“‘				MHz
GainBandwidthProduct	GBP			0.7
VoltageNoise	enp-p	0.1 Hz to 10 Hz		0.4		µV p-p
Voltage Noise Density	en	f = 1 kHz		15		nV/√Hz
Current Noise Density	in	f = 1 kHz		0.13		pA/√Hz

Specifications subject to change without notice.

REV. C

–3–

OP777/OP727/OP747

ABSOLUTE MAXIMUM RATINGS1, 2

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 V

Input Voltage . . . . . . . . . . . . . . . . . . . . –VS – 5 V to +VS + 5 V Differential Input Voltage . . . . . . . . . . . . . . ± Supply Voltage

Output Short-Circuit Duration to GND . . . . . . . . . Indefinite Storage Temperature Range

RM, R, RU Packages . . . . . . . . . . . . . . . . –65°C to +150°C Operating Temperature Range

OP777/OP727/OP747 . . . . . . . . . . . . . . . –40°C to +85°C Junction Temperature Range

RM, R, RU Packages . . . . . . . . . . . . . . . . –65°C to +150°C Lead Temperature Range (Soldering, 60 sec) . . . . . . . 300°C Electrostatic Discharge (Human Body Model) . . . . 2000 V max

Package Type	JA3	JC	Unit
8-Lead MSOP (RM)	190	44	°C/W
8-Lead SOIC (R)	158	43	°C/W
8-Lead TSSOP (RU)	240	43	°C/W
14-Lead SOIC (R)	120	36	°C/W
14-Lead TSSOP (RU)	180	35	°C/W

NOTES

1Absolute maximum ratings apply at 25°C, unless otherwise noted.

2Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

3θJA is specified for worst-case conditions, i.e., θJA is specified for device soldered in circuit board for surface-mount packages.

ORDERING GUIDE

	Temperature	Package	Package	Branding
Model	Range	Description	Option	Information
OP777ARM	–40°C to +85 °C	8-LeadMSOP	RM-8	A1A
OP777AR	–40°C to +85 °C	8-Lead SOIC	SO-8
OP727ARU	–40°C to +85 °C	8-LeadTSSOP	RU-8
OP727AR	–40°C to +85 °C	8-Lead SOIC	SO-8
OP747AR	–40°C to +85 °C	14-LeadSOIC	R-14
OP747ARU	–40°C to +85 °C	14-LeadTSSOP	RU-14

CAUTION MacshbM·“‘

	ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily	WARNING!
	accumulate on the human body and test equipment and can discharge without detection. Although
	the OP777/OP727/OP747 features proprietary ESD protection circuitry, permanent damage may
	occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD	ESD SENSITIVE DEVICE
	precautions are recommended to avoid performance degradation or loss of functionality.

–4–

REV. C

Typical Performance Characteristics–OP777/OP727/OP747

	220		VSY = 15V
	200
			VCM = 0V
AMPLIFIERS	180		TA = 25 C
	160
	140
	120
OF	100
NUMBER	80
	60
	40
	20
	0	0	20 40 60 80 100
	100 80 60 40 20
	OFFSET VOLTAGE – V

	220		VSY = 5V
	200
			VCM = 2.5V
AMPLIFIERS	180		TA = 25 C
	160
	140
	120
OF	100
NUMBER	80
	60
	40
	20
	0	0	20 40 60 80 100
	100 80 60 40 20
	OFFSET VOLTAGE – V

	30
				VSY = 15V
	25			VCM = 0V
AMPLIFIERS				TA = 40 C TO +85 C
	20
	15
OF
NUMBER	10
	5
	0
	0	0.2	0.4	0.6	0.8	1.0	1.2
		INPUT OFFSET DRIFT – V/ C

TPC 1. OP777 Input Offset Voltage

TPC 2. OP777 Input Offset Voltage

TPC 3. OP777 Input Offset Voltage

Distribution			Distribution									Drift Distribution
	200			600						VSY = 15V			600
	180	VSY = 15V															VSY = 5V
		VCM = 0V								VCM = 0V							VCM = 2.5V
				500									500
	160	TA = –40 C TO +85 C								TA = 25 C		NUMBER OF AMPLIFIERS					TA = 25 C
QUANTITY – Amplifiers			QUANTITY – Amplifiers
	140			400									400
	120
	100			300									300
	80
	60			200									200
	40
				100									100
	20	0			MacshbM·“‘0
	0
		0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2		–120		–80	–40	0	40	80	120		–120	–80	–40	0	40	80	120
		TCVOS – V/ C						V							OFFSET VOLTAGE – V

TPC 4. OP727/OP747 Input Offset

Voltage Drift (TCVOS Distribution)

	600
																															VSY = 5V
	500																														VCM = 2.5V
AMPLIFIERS																															TA = 25 C
	400
OF	300
NUMBER	200
	100

0
140 120	80 40	0	40	80	120
	OFFSET VOLTAGE – V

TPC 5. OP747 Input Offset Voltage

TPC 6. OP747 Input Offset Voltage

Distribution							Distribution
	600				VSY = 15V			30
												VSY = 15V
	500				VCM = 0V			25				VCM = 0V
AMPLIFIERS					TA = 25 C		AMPLIFIERS					TA = 25 C
	400							20
OF	300						OF	15
NUMBER	200						NUMBER	10
	100							5
	0		0	40				0
	140 120 80	40			80	120		3	4	5	6	7	8
	OFFSET VOLTAGE – V								INPUT BIAS CURRENT – nA

TPC 7. OP727 Input Offset Voltage	TPC 8. OP727 Input Offset Voltage	TPC 9. Input Bias Current
Distribution	Distribution	Distribution

REV. C

–5–