OP777ARMZ-R2 [ADI]
OP-AMP, 200uV OFFSET-MAX, 0.7MHz BAND WIDTH, PDSO8, MSOP-8;型号: | OP777ARMZ-R2 |
厂家: | ADI |
描述: | OP-AMP, 200uV OFFSET-MAX, 0.7MHz BAND WIDTH, PDSO8, MSOP-8 放大器 光电二极管 |
文件: | 总16页 (文件大小:190K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
Precision Micropower
Single-Supply Operational Amplifiers
a
OP777/OP727/OP747
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Low Offset Voltage: 100 ꢀV Max
Low Input Bias Current: 10 nA Max
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
Unity Gain Stable
8-Lead MSOP
(RM-8)
14-Lead SOIC
(R-14)
1
8
NC
ꢂIN
ꢃIN
Vꢂ
NC
V+
OUT
NC
OUT A
–IN A
ꢃIN A
Vꢃ
1
2
3
4
5
6
7
14
13
12
11
10
9
OUT D
–IN D
ꢃIN D
V–
OP777
4
5
No Phase Reversal
NC = NO CONNECT
OP747
TOP VIEW
(Not to Scale)
APPLICATIONS
Current Sensing (Shunt)
Line or Battery-Powered Instrumentation
Remote Sensors
ꢃIN B
–IN B
OUT B
ꢃIN C
–IN C
OUT C
8-Lead SOIC
(R-8)
8
Precision Filters
OP727 SOIC Pin-Compatible with LT1013
NC
NC
1
2
3
4
8
7
6
5
OP777
14-Lead TSSOP
(RU-14)
ꢂIN
V+
GENERAL DESCRIPTION
+IN
OUT
NC
The OP777 , OP727 , and OP747 are precision single , dual,
and quad rail-to-rail output single- supply amplifiers featuring
micropoweroperationandrail-to-railoutputranges. These
amplifier sprovideimprovedperformanceovertheindustry -standard
OP07with 15 V supplies , andofferthefurtheradvantageoftrue
single-supplyoperationdownto2.7V , andsmallerpackage
options than any other high-voltage precision bipolar amplifier.
Outputs are stable with capacitiveloadsofover 500pF. Supply
currentis lessthan300 µAperamplifierat5V. 500 Ω seriesresis-
tors protect the inputs, allowing input signal levels several volts above
the positive supply without phase reversal.
Vꢂ
OUT A
–IN A
ꢃIN A
Vꢃ
1
2
3
4
5
6
7
14
13
12
11
10
9
OUT D
–IN D
ꢃIN D
V–
NC = NO CONNECT
8-Lead TSSOP
(RU-8)
OP747
TOP VIEW
(Not to Scale)
ꢃIN B
–IN B
OUT B
ꢃIN C
–IN C
OUT C
1
2
3
4
8
7
6
5
OUT A
–IN A
Vꢃ
8
OP727
TOP VIEW
OUT B
–IN B
ꢃIN B
ꢃIN A
(Not to Scale)
V–
Applicationsfortheseamplifiersincludebothline-poweredand
portable instrumentation, remote sensor signal conditioning, and
precision filters.
8-Lead SOIC
(R-8)
TheOP777,OP727,andOP747arespecifiedovertheextended
industrial (–40°C to +85°C) temperature range. The OP777,
single, isavailablein8-leadMSOPand8-leadSOICpackages.
The OP747, quad, is available in 14-lead TSSOP and narrow
14-leadSO packages.Surface-mountdevicesinTSSOPand MSOP
packagesareavailableintapeandreelonly.
ꢃIN A
V–
1
8
7
6
5
–IN A
2
3
4
OUT A
OP727
TOP VIEW
(Not to Scale)
ꢃIN B
–IN B
Vꢃ
OUT B
TheOP727,dual,isavailablein8-leadTSSOPand8-lead
SOICpackages.TheOP7278-leadSOICpinconfiguration
differsfromthestandard8-leadoperationalamplifierpinout.
NOTE: THIS PIN CONFIGURATION DIFFERS
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, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat
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: 781/329-4700
Fax: 781/326-8703
www.analog.com
© Analog Devices, Inc., 2001
OP777/OP727/OP747–SPECIFICATIONS
(@ V = 5.0 V, VCM = 2.5 V, TA = 25ꢄC unless otherwise noted.)
ELECTRICAL CHARACTERISTICS
S
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
INPUTCHARACTERISTICS
OffsetVoltageOP777
VOS
+25ꢀC < TA < +85 ꢀC
–40°C < TA < +85 °C
+25ꢀC < TA < +85 ꢀC
–40°C < TA < +85 °C
–40°C < TA < +85 °C
–40°C < TA < +85 °C
20
50
30
60
5.5
0.1
100
200
160
300
11
2
4
µV
µV
OffsetVoltageOP727/OP747
µV
µV
InputBiasCurrent
Input Offset Current
InputVoltageRange
IB
IOS
nA
nA
V
0
Common-ModeRejectionRatio
LargeSignalVoltageGain
Offset Voltage Drift OP777
OffsetVoltageDriftOP727/OP747
CMRR
AVO
∆VOS/∆T
∆VOS/∆T
V
CM = 0 V to 4 V
104
300
110
500
0.3
0.4
dB
RL = 10 k Ω, VO = 0.5 V to 4.5 V
V/mV
µV/°C
µV/°C
–40°C < TA < +85 °C
1.3
1.5
–40°C < TA < +85 °C
OUTPUTCHARACTERISTICS
Output Voltage High
OutputVoltageLow
VOH
VOL
IOUT
IL = 1 mA, –40 °C to +85 °C
IL = 1 mA, –40 °C to +85 °C
VDROPOUT < 1 V
4.88
120
4.91
126
10
V
mV
mA
140
OutputCircuit
POWERSUPPLY
PowerSupplyRejectionRatio
SupplyCurrent/AmplifierOP777
PSRR
ISY
VS = 3 V to 30 V
VO = 0 V
–40°C < TA < +85 °C
VO = 0 V
130
220
270
235
290
dB
µA
µA
µA
µA
270
320
290
350
SupplyCurrent/AmplifierOP727/OP747
–40°C < TA < +85 °C
DYNAMICPERFORMANCE
SlewRate
GainBandwidthProduct
SR
GBP
RL = 2 kΩ
0.2
0.7
V/µs
MHz
NOISEPERFORMANCE
VoltageNoise
VoltageNoiseDensity
enp-p
en
in
0.1Hzto10Hz
f = 1 kHz
f = 1 kHz
0.4
15
0.13
µV p-p
nV/√Hz
pA/√Hz
CurrentNoiseDensity
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
(@ ꢁ15 V, VCM = 0 V, TA = 25ꢄC unless otherwise noted.)
ELECTRICAL CHARACTERISTICS
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
INPUTCHARACTERISTICS
OffsetVoltageOP777
VOS
VOS
+25°C < TA < +85 °C
–40°C < TA < +85 °C
+25°C < TA < +85 °C
–40°C < TA < +85 °C
–40°C < TA < +85 °C
–40°C < TA < +85 °C
30
50
30
50
5
100
200
160
300
10
µV
µV
OffsetVoltageOP727/OP747
µV
µV
InputBiasCurrent
Input Offset Current
InputVoltageRange
IB
IOS
nA
0.1
2
+14
nA
V
–15
Common-ModeRejectionRatio
LargeSignalVoltageGain
Offset Voltage Drift OP777
OffsetVoltageDriftOP727/OP747
CMRR
AVO
VCM = –15 V to +14 V
RL = 10 k Ω, VO = –14.5 V to +14.5 V
110
1,000
120
2,500
0.3
dB
V/mV
µV/°C
µV/°C
∆VOS/∆T –40°C < TA < +85 °C
∆VOS/∆T –40°C < TA < +85 °C
1.3
1.5
0.4
OUTPUTCHARACTERISTICS
Output Voltage High
OutputVoltageLow
VOH
VOL
IOUT
IL = 1 mA, –40 °C to +85 °C
IL = 1 mA, –40 °C to +85 °C
+14.9
120
+14.94
–14.94 –14.9
30
V
V
mA
OutputCircuit
POWERSUPPLY
PowerSupplyRejectionRatio
SupplyCurrent/AmplifierOP777
PSRR
ISY
VS = 1.5 V to 15 V
VO = 0 V
–40°C < TA < +85 °C
VO = 0 V
130
dB
µA
µA
µA
µA
300
350
320
375
350
400
375
450
SupplyCurrent/AmplifierOP727/747
–40°C < TA < +85 °C
DYNAMICPERFORMANCE
SlewRate
GainBandwidthProduct
SR
GBP
RL = 2 kΩ
0.2
0.7
V/µs
MHz
NOISEPERFORMANCE
VoltageNoise
VoltageNoiseDensity
CurrentNoiseDensity
enp-p
en
in
0.1Hzto10Hz
f = 1 kHz
f = 1 kHz
0.4
15
0.13
µV p-p
nV/√Hz
pA/√Hz
Specifications subject to change without notice.
–3–
REV. C
OP777/OP727/OP747
ABSOLUTE MAXIMUM RATINGS1, 2
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 V
Input Voltage . . . . . . . . . . . . . . . . . . . . –VS – 5 V to +VS + 5 V
Differential Input 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
3
Package Type
ꢅJA
ꢅJC
Unit
8-LeadMSOP(RM)
8-LeadSOIC(R)
8-LeadTSSOP(RU)
14-LeadSOIC(R)
14-LeadTSSOP(RU)
190
158
240
120
180
44
43
43
36
35
°C/W
°C/W
°C/W
°C/W
°C/W
Supply Voltage
NOTES
1Absolute maximum ratings apply at 25°C, unless otherwise noted.
2Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent 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
Range
Package
Description
Package
Option
Branding
Information
Model
OP777ARM
OP777AR
OP727ARU
OP727AR
OP747AR
OP747ARU
–40°Cto+85 °C
–40°Cto+85 °C
–40°Cto+85 °C
–40°Cto+85 °C
–40°Cto+85 °C
–40°Cto+85 °C
8-LeadMSOP
8-LeadSOIC
8-LeadTSSOP
8-LeadSOIC
14-LeadSOIC
14-LeadTSSOP
RM-8
SO-8
RU-8
SO-8
R-14
A1A
RU-14
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
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
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
–4–
REV. C
Typical Performance Characteristics
–
OP777/OP727/OP747
30
220
220
V
V
T
= 5V
= 2.5V
= 25ꢄC
V
V
T
= ꢁ15V
= 0V
= 25ꢄC
SY
V
V
T
= ꢁ15V
= 0V
= ꢂ40ꢄC TO +85ꢄC
SY
SY
200
180
160
200
180
160
CM
CM
CM
25
20
15
10
5
A
A
A
140
120
100
80
140
120
100
80
60
60
40
40
20
0
20
0
0
ꢂ100
0
20 40 60 80 100
ꢂ100
0
20 40 60 80 100
ꢂ80ꢂ60 ꢂ40ꢂ20
ꢂ80ꢂ60 ꢂ40ꢂ20
0
0.2
0.4
0.6
0.8
1.0
1.2
OFFSET VOLTAGE – ꢀV
OFFSET VOLTAGE – ꢀV
INPUT OFFSET DRIFT – ꢀV/ꢄC
TPC 1. OP777 Input Offset Voltage
Distribution
TPC 2. OP777 Input Offset Voltage
Distribution
TPC 3. OP777 Input Offset Voltage
Drift Distribution
200
600
600
V
V
T
= ꢁ15V
= 0V
= 25ꢄC
V
V
T
= ꢁ15V
= 0V
= –40ꢄC TO +85ꢄC
SY
V
V
T
= 5V
= 2.5V
= 25ꢄC
SY
SY
180
160
140
120
100
80
CM
CM
CM
500
400
300
200
100
0
500
400
300
200
100
0
A
A
A
60
40
20
0
–120 –80
–40
0
40
80
120
–120 –80
–40
0
40
80
120
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
TCV – ꢀV/ꢄC
ꢀV
OFFSET VOLTAGE – ꢀV
OS
TPC 4. OP727/OP747 Input Offset
Voltage Drift (TCVOS Distribution)
TPC 5. OP747 Input Offset Voltage
Distribution
TPC 6. OP747 Input Offset Voltage
Distribution
30
600
600
V
V
T
= ꢁ15V
= 0V
= 25ꢄC
V
V
T
= 5V
= 2.5V
= 25ꢄC
SY
V
V
T
= ꢁ15V
= 0V
= 25ꢄC
SY
SY
CM
CM
CM
500
400
300
200
100
500
400
300
200
100
25
20
15
10
5
A
A
A
0
0
0
0
40
ꢂ140
80
120
ꢂ120
ꢂ80 ꢂ40
ꢂ140ꢂ120
0
40
ꢂ80 ꢂ40
3
5
7
80
120
4
6
8
INPUT BIAS CURRENT – nA
OFFSET VOLTAGE – ꢀV
OFFSET VOLTAGE – ꢀV
TPC 7. OP727 Input Offset Voltage
Distribution
TPC 9. Input Bias Current
Distribution
TPC 8. OP727 Input Offset Voltage
Distribution
–5–
REV. C
OP777/OP727/OP747
10k
6
5
4
3
2
10k
1k
V
T
= ꢁ15V
= 25ꢄC
V
T
= 5V
= 25ꢄC
S
S
V
= ꢁ15V
SY
A
A
1k
SINK
100
10
100
10
SOURCE
SINK
1.0
1.0
SOURCE
1
0.1
0
0.1
0
0
0.001
0.01
0.1
1
10
100
0.001
0.01
0.1
1
10
100
ꢂ60 ꢂ40ꢂ20
0
20 40 60 80 100 120 140
LOAD CURRENT – mA
LOAD CURRENT – mA
TEMPERATURE – ꢄC
TPC 10. Output Voltage to Supply
Rail vs. Load Current
TPC 11. Output Voltage to Supply
Rail vs. Load Current
TPC 12. Input Bias Current vs.
Temperature
500
400
350
140
120
100
80
V
C
R
= ꢁ15V
T
= 25ꢄC
SY
A
= 0
=
LOAD
LOAD
300
250
200
150
100
50
I
(V = ꢁ15V)
300
SY+ SY
200
100
0
I
(V = 5V)
SY+ SY
60
45
0
40
90
ꢂ100
ꢂ200
ꢂ300
ꢂ400
ꢂ500
20
135
180
225
270
I
(V = 5V)
SYꢂ SY
0
–20
–40
–60
I
(V = ꢁ15V)
SYꢂ SY
0
0
5
10
15
20
25
30
35
ꢂ60 ꢂ40 ꢂ20
0
20 40 60 80 100 120 140
TEMPERATURE – ꢄC
10
100 1k
10k 100k 1M 10M 100M
SUPPLY VOLTAGE – V
FREQUENCY – Hz
TPC 13. Supply Current vs.
Temperature
TPC 14. Supply Current vs. Supply
Voltage
TPC 15. Open Loop Gain and
Phase Shift vs. Frequency
140
120
100
60
60
V
C
R
= ꢁ15V
V
C
R
= 5V
SY
V
C
R
= 5V
SY
SY
50
40
= 0
= 0
50
40
LOAD
= 0
= 2kꢇ
LOAD
LOAD
LOAD
= 2kꢇ
=
LOAD
LOAD
A
= ꢂ100
V
A
= ꢂ100
V
80
60
40
20
0
30
0
30
20
45
20
A
= ꢂ10
V
A
= ꢂ10
V
10
90
10
0
135
180
225
270
0
A
= +1
V
A
= +1
V
ꢂ10
ꢂ20
ꢂ30
ꢂ40
ꢂ10
ꢂ20
ꢂ30
ꢂ40
–20
–40
–60
1k
10k
100k
1M
10M
100M
100
1k
10k 100k
1M
10M 100M
1k
10k
100k
1M
10M
100M
FREQUENCY – Hz
FREQUENCY – Hz
FREQUENCY – Hz
TPC 16. Open Loop Gain and
Phase Shift vs. Frequency
TPC 17. Closed Loop Gain vs.
Frequency
TPC 18. Closed Loop Gain vs.
Frequency
–6–
REV. C
OP777/OP727/OP747
300
270
240
210
180
150
120
90
300
270
240
210
180
150
120
90
V
R
C
= ꢁ2.5V
= 2kꢇ
= 300pF
V
= 5V
V
= ꢁ15V
SY
SY
SY
A
= 1
L
L
V
A = 1
V
A
= 1
V
0V
A
= 100
100k
V
60
A
= 10
60
A
= 10
V
A
= 100
1k
V
V
30
30
0
0
100
1k
10k
1M
10M 100M
100
10k
100k
FREQUENCY – Hz
1M
10M 100M
TIME – 100ꢀs/DIV
FREQUENCY – Hz
TPC 19. Output Impedance vs.
Frequency
TPC 20. Output Impedance vs.
Frequency
TPC 21. Large Signal Transient
Response
V
R
C
= ꢁ15V
= 2kꢇ
= 300pF
V
C
R
= ꢁ2.5V
= 300pF
= 2kꢇ
V
C
R
= ꢁ15V
= 300pF
= 2kꢇ
SY
SY
SY
L
L
L
L
L
L
V
= 100mV
V
= 100mV
IN
IN
A
= 1
V
A
= 1
A
= 1
V
V
0V
TIME – 100ꢀs/DIV
TIME – 10ꢀs/DIV
TIME – 10ꢀs/DIV
TPC 22. Large Signal Transient
Response
TPC 23. Small Signal Transient
Response
TPC 24. Small Signal Transient
Response
40
35
V
R
= ꢁ2.5V
= 2kꢇ
= 100mV
V
R
= ꢁ15V
= 2kꢇ
= 100mV
SY
SY
INPUT
35
30
25
20
15
10
5
+200mV
L
L
30
25
20
15
10
V
V
IN
IN
0V
ꢃOS
V
R
A
= ꢁ15V
= 10kꢇ
= ꢂ100
SY
+OS
L
V
ꢂOS
V
= 200mV
IN
ꢂOS
0V
ꢂ10V
5
0
OUTPUT
0
1
10
100
1k
1
10
100
1k
10k
TIME – 40ꢀs/DIV
CAPACITANCE – pF
CAPACITANCE – pF
TPC 25. Small Signal Overshoot
vs. Load Capacitance
TPC 26. Small Signal Overshoot
vs. Load Capacitance
TPC 27. Negative Overvoltage
Recovery
–7–
REV. C
OP777/OP727/OP747
200mV
0V
INPUT
0V
INPUT
INPUT
0V
V
R
A
= ꢁ15V
= 10kꢇ
= ꢂ100
SY
V
R
A
= ꢁ2.5V
= 10kꢇ
= ꢂ100
V
R
A
= ꢁ2.5V
= 10kꢇ
= ꢂ100
SY
SY
ꢂ200mV
ꢂ200mV
L
L
L
V
V
V
V
= ꢂ200mV
IN
V
= 200mV
V
= ꢂ200mV
IN
IN
10V
0V
0V
2V
0V
OUTPUT
ꢂ2V
OUTPUT
OUTPUT
TIME – 40ꢀs/DIV
TIME – 40ꢀs/DIV
TIME – 40ꢀs/DIV
TPC 28. Positive Overvoltage
Recovery
TPC 29. Negative Overvoltage
Recovery
TPC 30. Positive Overvoltage
Recovery
140
140
V
A
= ꢁ15V
= 1
S
V
= ꢁ2.5V
V
= ꢁ15V
INPUT
SY
SY
V
120
100
80
60
40
20
0
120
100
80
60
40
20
0
OUTPUT
10
100
1k
10k 100k
1M
10M
10
100
1k
10k 100k
1M
10M
TIME – 400ꢀs/DIV
FREQUENCY – Hz
FREQUENCY – Hz
TPC 31. No Phase Reversal
TPC 32. CMRR vs. Frequency
TPC 33. CMRR vs. Frequency
140
140
V = 5V
SY
GAIN = 10M
V
= ꢁ2.5V
V
= ꢁ15V
SY
SY
120
100
80
60
40
20
0
120
100
80
60
40
20
0
+PSRR
ꢂPSRR
+PSRR
ꢂPSRR
10
100
1k
10k 100k
1M
10M
10
100
1k
10k 100k
1M
10M
TIME – 1s/DIV
FREQUENCY – Hz
FREQUENCY – Hz
TPC 34. PSRR vs. Frequency
TPC 35. PSRR vs. Frequency
TPC 36. 0.1 Hz to 10 Hz Input
Voltage Noise
–8–
REV. C
OP777/OP727/OP747
90
80
70
90
V
= ꢁ15V
V
= ꢁ15V
V
= ꢁ2.5V
SY
SY
GAIN = 10M
SY
80
70
60
50
40
30
20
10
60
50
40
30
20
10
0
0
100
200
300
400
500
100
200
300
400
500
TIME – 1s/DIV
FREQUENCY – Hz
FREQUENCY – Hz
TPC 37. 0.1 Hz to 10 Hz Input
Voltage Noise
TPC 38. Voltage Noise Density
TPC 39. Voltage Noise Density
50
40
40
V = 5V
SY
V
= ꢁ2.5V
V
= ꢁ15V
SY
SY
40
35
30
35
30
30
20
I
SCꢂ
25
20
15
10
5
25
20
15
10
5
10
0
ꢂ10
ꢂ20
ꢂ30
I
SC+
ꢂ40
ꢂ50
0
0
0
ꢂ60ꢂ40 ꢂ20
0
500
1k
1.5k
2.0k
2.5k
20 40 60 80 100 120 140
0
500
1k
1.5k
2.0k
2.5k
FREQUENCY – Hz
TEMPERATURE – ꢄC
FREQUENCY – Hz
TPC 40. Voltage Noise Density
TPC 41. Voltage Noise Density
TPC 42. Short Circuit Current vs.
Temperature
160
50
4.95
V
I
= 5V
V
= ꢁ15V
V
I
= 5V
= 1mA
SY
= 1mA
SY
SY
40
150
140
130
120
110
100
L
L
4.94
4.93
4.92
4.91
4.90
4.89
30
20
I
SCꢂ
10
0
ꢂ10
ꢂ20
ꢂ30
90
80
70
I
SC+
ꢂ40
ꢂ50
ꢂ40 ꢂ20
ꢂ60
0
20 40 60 80 100 120 140
ꢂ40 ꢂ20
0
ꢂ60ꢂ40 ꢂ20
0
20 40 60 80 100 120 140
TEMPERATURE – ꢄC
ꢂ60
20 40 60 80 100 120 140
TEMPERATURE – ꢄC
TEMPERATURE – ꢄC
TPC 43. Short Circuit Current vs.
Temperature
TPC 44. Output Voltage High vs.
Temperature
TPC 45. Output Voltage Low vs.
Temperature
–9–
REV. C
OP777/OP727/OP747
1.5
1.0
14.964
ꢂ14.930
ꢂ14.935
ꢂ14.940
ꢂ14.945
V
I
= ꢁ15V
= 1mA
V
= ꢁ15V
= 1mA
SY
SY
V
V
= ꢁ15V
= 0V
= 25ꢄC
SY
14.962
I
L
L
CM
14.960
T
A
14.958
14.956
14.954
0.5
0
14.952
14.950
14.948
ꢂ0.5
ꢂ1.0
ꢂ1.5
ꢂ14.950
ꢂ14.955
ꢂ14.960
14.946
14.944
ꢂ40 ꢂ20
ꢂ40 ꢂ20
0
0
0
ꢂ60
20 40 60 80 100 120 140
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
ꢂ60
20 40 60 80 100 120 140
TIME – Minutes
TEMPERATURE – ꢄC
TEMPERATURE – ꢄC
TPC 46. Output Voltage High vs.
Temperature
TPC 48. Warm-Up Drift
TPC 47. Output Voltage Low vs.
Temperature
BASIC OPERATION
The OP777/OP727/OP747 amplifier uses a precision Bipolar
PNP input stage coupled with a high-voltage CMOS output
stage. This enables this amplifier to feature an input voltage
range which includes the negative supply voltage (often ground-
in single-supply applications) and also swing to within 1 mV of the
output rails. Additionally, the input voltage range extends to within
1 V of the positive supply rail. The epitaxial PNP input structure
provides high breakdown voltage, high gain, and an input bias cur-
rent figure comparable to that obtained with a “Darlington” input
stage amplifier but without the drawbacks (i.e., severe penalties for
input voltage range, offset, drift and noise). The PNP input structure
also greatly lowers the noise and reduces the dc input error terms.
V
OUT
0V
V
IN
TIME – 0.2ms/DIV
Supply Voltage
Figure 1. Input and Output Signals with VCM < 0 V
The amplifiers are fully specified with a single 5 V supply and, due
to design and process innovations, can also operate with a supply
voltage from 2.7 V up to 30 V. This allows operation from most
split supplies used in current industry practice, with the advantage
of substantially increased input and output voltage ranges over
conventional split-supply amplifiers. The OP777/OP727/OP747
series is specified with (VSY = 5 V, V– = 0 V and VCM = 2.5 V
which is most suitable for single-supply application. With PSRR of
130 dB (0.3 µV/V) and CMRR of 110 dB (3 µV/V) offset is mini-
mally affected by power supply or common-mode voltages. Dual
supply, 15 V operation is also fully specified.
100kꢇ
100kꢇ
+3V
ꢂ0.27V
100kꢇ
OP777/
OP727/
OP747
100kꢇ
ꢂ0.1V
V
= 1kHz at 400mV p-p
IN
Input Common-Mode Voltage Range
Figure 2. OP777/OP727/OP747 Configured as a Differ-
ence Amplifier Operating at VCM < 0 V
The OP777/OP727/OP747 is rated with an input common-mode
voltage which extends from the minus supply to within 1 V of the
positive supply. However, the amplifier can still operate with input
voltages slightly below VEE. In Figure 2, OP777/OP727/OP747 is
configured as a difference amplifier with a single supply of 2.7 V
and negative dc common-mode voltages applied at the inputs
terminals. A 400 mV p-p input is then applied to the noninverting
input. It can be seen from the graph below that the output does not
show any distortion. Micropower operation is maintained by using
large input and feedback resistors.
–10–
REV. C
OP777/OP727/OP747
Input Over Voltage Protection
Whentheinputofanamplifierismorethanadiodedropbelow
V
= ꢁ15V
SY
V
IN
V
EE, or above V CC, large currents will flow from the substrate
(V–) or the positive supply (V+), respectively, to the input pins
whichcandestroythedevice.InthecaseofOP777/OP727/
OP747,differentialvoltagesequaltothesupplyvoltagewillnot
causeanyproblem(seeFigure3).OP777/OP727/OP747has
built-in 500 Ω internal current limiting resistors, in series with the
inputs, to minimize the chances of damage. It is a good practice to
keep the current flowing into the inputs below 5 mA. In this con-
text it should also be noted that the high breakdown of the input
transistors removes the necessity for clamp diodes between the
inputs of the amplifier, a feature that is mandatory on many preci-
sion op amps. Unfortunately, such clamp diodes greatly interfere
with many application circuits such as precision rectifiers and
comparators. The OP777/OP727/OP747 series is free from such
limitations.
V
OUT
TIME – 400ꢀs/DIV
Figure 4. No Phase Reversal
Output Stage
The CMOS output stage has excellent (and fairly symmetric) output
drive and with light loads can actually swing to within 1 mV of both
supplyrails.Thisisconsiderablybetterthansimilaramplifiers
featuring(so-called)rail-to-railbipolaroutputstages.OP777/
OP727/OP747 is stable in the voltage follower configuration and
responds to signals as low as 1 mV above ground in single supply
operation.
30V
OP777/
V p-p = 32V
OP727/
OP747
2.7V TO 30V
Figure 3a. Unity Gain Follower
V
= 1mV
OUT
V
= ꢁ15V
V
= 1mV
SY
IN
OP777/
OP727/
OP747
V
IN
V
OUT
Figure 5. Follower Circuit
TIME – 400ꢀs/DIV
1.0mV
Figure 3b. Input Voltage Can Exceed the Supply Voltage
Without Damage
Phase Reversal
Manyamplifiersmisbehavewhenoneorbothoftheinputsare
forced beyond the input common-mode voltage range. Phase
reversal is typified by the transfer function of the amplifier effectively
reversing its transfer polarity. In some cases this can cause lockup in
servo systems and may cause permanent damage or nonrecoverable
parameter shifts to the amplifier. Many amplifiers feature compensa-
tion circuitry to combat these effects, but some are only effective for
the inverting input. Additionally, many of these schemes only work
for a few hundred millivolts or so beyond the supply rails. OP777/
OP727/OP747hasaprotectioncircuitagainstphasereversal
when one or both inputs are forced beyond their input common-
mode voltage range. It is not recommended that the parts be
continuouslydrivenmorethan3Vbeyondtherails.
TIME – 10ꢀs/DIV
Figure 6. Rail-to-Rail Operation
Output Short Circuit
The output of the OP777/OP727/OP747 series amplifier is protected
from damage against accidental shorts to either supply voltage,
provided that the maximum die temperature is not exceeded on a
long-term basis (see Absolute Maximum Rating section). Current of
up to 30 mA does not cause any damage.
A Low-Side Current Monitor
In the design of power supply control circuits, a great deal of design
effort is focused on ensuring a pass transistor’s long-term reliability
over a wide range of load current conditions. As a result, monitoring
REV. C
–11–
OP777/OP727/OP747
15V
andlimitingdevicepowerdissipationisofprimeimportancein
thesedesigns. Figure7showsanexampleof5V, single-supply
current monitor that can be incorporated into the design of a voltage
regulatorwithfoldbackcurrentlimitingorahighcurrentpower
supplywithcrowbarprotection.Thedesigncapitalizesonthe
OP777’scommon-moderangethatextendstoground.Current
1kꢇ
REF
192
2N2222
1/4 OP747
R2
12kꢇ
3
4
ismonitoredinthepowersupplyreturnwherea0.1
Ω shunt
20kꢇ
+15V
R1
R1
R
resistor, RSENSE, creates a very small voltage drop. The voltage at the
inverting terminal becomes equal to the voltage at the noninverting
terminal through the feedback of Q1, which is a 2N2222 or equiva-
lent NPN transistor. This makes the voltage drop across R1 equal to
the voltage drop across RSENSE. Therefore, the current through Q1
becomes directly proportional to the current through RSENSE, and
the output voltage is given by:
V
O
R(1+ꢈ)
+15V
1/4 OP747
ꢂ15V
R2
R1
ꢆR
R
V
=
V
ꢈ
O
REF
1/4 OP747
ꢈ =
ꢂ15V
Figure 9. Linear Response Bridge
R2
R1
A single-supply current source is shown in Figure 10. Large resistors
are used to maintain micropower operation. Output current can be
adjustedbychangingtheR2Bresistor.Compliancevoltageis:
VOUT = 5V −
× RSENSE × I
L
The voltage drop across R2 increases with IL increasing, so VOUT
decreases with higher supply current being sensed. For the element
values shown, the VOUT is 2.5 V for return current of 1 A.
VL ≤ VSAT − VS
10pF
2.7V TO 30V
5V
100kꢇ
R2 = 2.49kꢇ
100kꢇ
V
OP777
OUT
R1 = 100kꢇ
Q1
R2B
5V
2.7kꢇ
10pF
I
O
R2 = R2A + R2B
R2
R1 ꢉ R2B
= 1mA ꢂ 11mA
+
R2A
97.3kꢇ
OP777
R1 = 100ꢇ
V
R
LOAD
L
I
=
V
S
O
0.1ꢇ
RETURN TO
GROUND
ꢂ
R
SENSE
Figure 10. Single-Supply Current Source
Figure 7. A Low-Side Load Current Monitor
A single-supply instrumentation amplifier using one OP727
amplifierisshowninFigure11.FortruedifferenceR3/R4=
R1/R2. The formula for the CMRR of the circuit at dc is CMRR =
20 × log (100/(1–(R2 × R3)/(R1× R4)). It is common to specify the
accuracy of the resistor network in terms of resistor-to-resistor
percentage mismatch. We can rewrite the CMRR equation to
reflect this CMRR = 20 × log (10000/% Mismatch). The key to
high CMRR is a network of resistors that are well matched from
the perspective of both resistive ratio and relative drift. It should
be noted that the absolute value of the resistors and their absolute
drift are of no consequence. Matching is the key. CMRR is 100 dB
with0.1%mismatchedresistornetwork.TomaximizeCMRR,
one of the resistors such as R4 should be trimmed. Tighter match-
ingof two op amps in one package (OP727) offers a significant
boostinperformanceoverthetripleopampconfiguration.
The OP777/OP727/OP747 is very useful in many bridge applica-
tions. Figure 8 shows a single-supply bridge circuit in which its
output is linearly proportional to the fractional deviation (ꢁ) of
the bridge. Note that ꢁ = ∆R/R.
= 300
15V
AR1ꢉV
REF
V
=
ꢈ + 2.5V
O
2R2
ꢆR1
2
ꢈ =
1/4 OP747
R1
6
RG = 10kꢇ
REF
192
2
10.1kꢇ
1Mꢇ
2.5V
4
3
1Mꢇ
REF
192
0.1ꢀF
15V
15V
4
3
R1(1+ꢈ)
V1
10.1kꢇ
R1
V
O
1/4 OP747
R1(1+ꢈ)
R1
1/4 OP747
R3 = 10.1kꢇ
R2 = 1Mꢇ
R2
2.7V TO 30V
2.7V TO 30V
V2
R4 = 1Mꢇ
R1 = 10.1kꢇ
Figure 8. Linear Response Bridge, Single Supply
V
O
1/2 OP727
In systems where dual supplies are available, the circuit of Figure
9 could be used to detect bridge outputs that are linearly related
to the fractional deviation of the bridge.
V1
V2
1/2 OP727
V
= 100 (V2 ꢂ V1)
O
0.02mV V1 ꢂ V2 290mV
2mV 29V
USE MATCHED RESISTORS
V
OUT
Figure 11. Single-Supply Micropower Instrumentation
Amplifier
–12–
REV. C
OP777/OP727/OP747
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
8-Lead MSOP
(RM-8)
0.122 (3.10)
0.114 (2.90)
8
5
4
0.122 (3.10)
0.114 (2.90)
0.199 (5.05)
0.187 (4.75)
1
PIN 1
0.0256 (0.65) BSC
0.120 (3.05)
0.112 (2.84)
0.120 (3.05)
0.112 (2.84)
0.043 (1.09)
0.037 (0.94)
0.006 (0.15)
0.002 (0.05)
33ꢄ
0.018 (0.46)
0.008 (0.20)
27ꢄ
0.028 (0.71)
0.016 (0.41)
0.011 (0.28)
0.003 (0.08)
SEATING
PLANE
8-Lead SOIC
(R-8)
0.1968 (5.00)
0.1890 (4.80)
8
1
5
4
0.2440 (6.20)
0.2284 (5.80)
0.1574 (4.00)
0.1497 (3.80)
PIN 1
0.0196 (0.50)
0.0099 (0.25)
0.0500 (1.27)
BSC
ꢉ 45ꢄ
0.0688 (1.75)
0.0532 (1.35)
0.0098 (0.25)
0.0040 (0.10)
SEATING
PLANE
8ꢄ
0ꢄ
0.0500 (1.27)
0.0160 (0.41)
0.0192 (0.49)
0.0138 (0.35)
0.0098 (0.25)
0.0075 (0.19)
8-Lead TSSOP
(RU-8)
0.122 (3.10)
0.114 (2.90)
8
5
0.177 (4.50)
0.169 (4.30)
0.256 (6.50)
0.246 (6.25)
1
4
PIN 1
0.0256 (0.65)
BSC
0.0433
(1.10)
MAX
0.006 (0.15)
0.002 (0.05)
SEATING
PLANE
8ꢄ
0ꢄ
0.0118 (0.30)
0.0075 (0.19)
0.028 (0.70)
0.020 (0.50)
0.0079 (0.20)
0.0035 (0.090)
REV. C
–13–
OP777/OP727/OP747
14-Lead SOIC
(R-14)
0.3444 (8.75)
0.3367 (8.55)
8
14
1
0.1574 (4.00)
0.1497 (3.80)
0.2440 (6.20)
0.2284 (5.80)
7
PIN 1
0.0688 (1.75)
0.0532 (1.35)
0.050 (1.27)
BSC
0.0196 (0.50)
0.0099 (0.25)
ꢉ 45ꢄ
8ꢄ
0ꢄ
0.0098 (0.25)
0.0040 (0.10)
0.0192 (0.49)
0.0138 (0.35)
SEATING
PLANE
0.0500 (1.27)
0.0160 (0.41)
0.0099 (0.25)
0.0075 (0.19)
14-Lead TSSOP
(RU-14)
0.201 (5.10)
0.193 (4.90)
14
8
0.177 (4.50)
0.169 (4.30)
0.256 (6.50)
0.246 (6.25)
1
7
PIN 1
0.006 (0.15)
0.002 (0.05)
0.0433 (1.10)
MAX
8ꢄ
0ꢄ
0.0256 0.0118 (0.30)
0.028 (0.70)
0.020 (0.50)
SEATING
PLANE
0.0079 (0.20)
0.0035 (0.090)
(0.65)
BSC
0.0075 (0.19)
–14–
REV. C
OP777/OP727/OP747
Revision History
Location
Page
Data Sheet changed from REV. B to REV. C.
AdditionoftexttoAPPLICATIONSsection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additionof8-LeadSOIC(R-8)package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1
1
2
AdditionoftexttoGENERALDESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AdditionofpackagetoORDERINGGUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REV. C
–15–
–16–
相关型号:
OP777ARMZ-REEL
OP-AMP, 200 uV OFFSET-MAX, 0.7 MHz BAND WIDTH, PDSO8, ROHS COMPLIANT, MSOP-8
ROCHESTER
OP77AJ/883C
IC OP-AMP, 25 uV OFFSET-MAX, 0.6 MHz BAND WIDTH, MBCY8, TO-99, 8 PIN, Operational Amplifier
ADI
©2020 ICPDF网 联系我们和版权申明