Transcript
Precision, Very Low Noise, Low Input Bias Current Op Amp AD8672-EP
Enhanced Product
PIN CONFIGURATION
Voltage noise density: 2.8 nV/√Hz typical Peak-to-peak noise: 77 nV p-p typical Gain bandwidth product: 10 MHz Low input bias current: 14 nA maximum Low offset voltage: 75 μV maximum High open-loop gain: 1000 V/mV (120 dB) Low supply current per amplifier: 3 mA typical Dual-supply operation: ±5 V to ±15 V Unity-gain stable No phase reversal
ENHANCED PRODUCT FEATURES Supports defense and aerospace applications (AQEC standard) Extended temperature range: −55°C to +125°C Controlled manufacturing baseline One assembly/test site One fabrication site Enhanced product change notification Qualification data available on request
APPLICATIONS
8
V+
–IN A 2
AD8672-EP
7
OUT B
+IN A 3
TOP VIEW (Not to Scale)
6
–IN B
5
+IN B
V– 4
Figure 1.
GENERAL DESCRIPTION The AD8672-EP is a very high precision amplifier featuring very low noise, very low offset voltage and drift, low input bias current, 10 MHz bandwidth, and low power consumption. Outputs are stable with capacitive loads of over 1000 pF. Supply current is less than 3 mA per amplifier at 30 V. The combination of ultralow noise, high precision, speed, and stability within the AD8672-EP is unmatched. Applications for this amplifier include high quality PLL filters, precision filters, medical and analytical instrumentation, precision power supply controls, ATE, data acquisition, and precision controls, as well as professional quality audio. The AD8672-EP is available in an 8-lead SOIC narrow package. It is specified over a −55°C to +125°C temperature range.
Phase-locked loop (PLL) filters Filters for GPS Instrumentation Sensors and controls Professional quality audio
Rev. 0
OUT A 1
13063-001
FEATURES
Additional application and technical information can be found in the AD8672 data sheet.
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AD8672-EP
Enhanced Product
TABLE OF CONTENTS Features .............................................................................................. 1
Electrical Characteristics, ±15 V .................................................4
Enhanced Product Features ............................................................ 1
Absolute Maximum Ratings ............................................................5
Applications ....................................................................................... 1
Thermal Resistance .......................................................................5
Pin Configuration ............................................................................. 1
ESD Caution...................................................................................5
General Description ......................................................................... 1
Typical Performance Charateristics ................................................6
Revision History ............................................................................... 2
Outline Dimensions ..........................................................................8
Specifications..................................................................................... 3
Ordering Guide .............................................................................8
Electrical Characteristics, ±5 V .................................................. 3
REVISION HISTORY 9/15—Revision 0: Initial Version
Rev. 0 | Page 2 of 8
Enhanced Product
AD8672-EP
SPECIFICATIONS ELECTRICAL CHARACTERISTICS, ±5 V VSY = ±5.0 V, VCM = 0 V, TA = 25°C, unless otherwise specified. Table 1. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Bias Current
Symbol
Test Conditions/Comments
Typ
Max
Unit
20 30 0.3 +3 +5 +8 +6 +6 +8
75 125 0.8 +14 +20 +60 +14 +20 +60 +2.5
120 6000
μV μV μV/°C nA nA nA nA nA nA V dB V/mV
CINCM CINDM
6.25 7.5
pF pF
RIN RINDM
3.5 15
GΩ MΩ
+4.0 +3.9 −3.9 −3.8 ±10
V V V V mA
VOS ∆VOS/∆T IB
−55°C < TA < +125°C −55°C < TA < +125°C 25°C < TA < 125°C −55°C < TA < +125°C
Input Offset Current
IOS 25°C < TA < 125°C −55°C < TA < +125°C
Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Input Capacitance Common Mode Differential Mode Input Resistance Common Mode Differential Mode OUTPUT CHARACTERISTICS Output Voltage High Low
Min
CMRR AVO
VOH VOL
VCM = −2.5 V to +2.5 V RL = 2 kΩ, VO = −3 V to +3 V
−14 −20 −60 −14 −20 −60 −2.5 100 1000
RL = 2 kΩ, −55°C to +125°C RL = 600 Ω RL = 2 kΩ, −55°C to +125°C RL = 600 Ω
+3.8 +3.7
110
Output Current POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier
PSRR ISY
VS = ±4 V to ±18 V VO = 0 V −55°C < TA < +125°C
DYNAMIC PERFORMANCE Slew Rate Settling Time
SR tS
RL = 2 kΩ To 0.1% (4 V step, G = 1) To 0.01% (4 V step, G = 1)
4 1.4 5.1 10
0.1 Hz to 10 Hz f = 1 kHz f = 1 kHz f = 1 kHz f = 10 kHz
77 2.8 0.3 −130 −105
Gain Bandwidth Product NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Current Noise Density Channel Separation
IOUT
GBP en p-p en in CS
Rev. 0 | Page 3 of 8
130 3
−3.8 −3.7
3.5 4.2
dB mA mA V/μs μs μs MHz
100 3.8
nV p-p nV/√Hz pA/√Hz dB dB
AD8672-EP
Enhanced Product
ELECTRICAL CHARACTERISTICS, ±15 V VS = ±15.0 V, VCM = 0 V, TA = 25°C, unless otherwise specified. Table 2. Parameter INPUT CHARACTERISTICS Offset Voltage Offset Voltage Drift Input Bias Current
Symbol
Test Conditions/Comments
Typ
Max
Unit
20 30 0.3 +3 +5 +8 +6 +6 +8
75 125 0.8 +14 +20 +60 +14 +20 +60 +12
120 6000
μV μV μV/°C nA nA nA nA nA nA V dB V/mV
CINCM CINDM
6.25 7.5
pF pF
RIN RINDM
3.5 15
GΩ MΩ
13.8 12.3 −13.8 −12.4 ±20 ±30
V V V V mA mA
VOS ∆VOS/∆T IB
−55°C < TA < +125°C −55°C < TA < +125°C 25°C < TA < 125°C −55°C < TA < +125°C
Input Offset Current
IOS 25°C < TA < 125°C −55°C < TA < +125°C
Input Voltage Range Common-Mode Rejection Ratio Large Signal Voltage Gain Input Capacitance Common Mode Differential Mode Input Resistance Common Mode Differential Mode OUTPUT CHARACTERISTICS Output Voltage High Low
Min
CMRR AVO
VOH VOL
VCM = −12 V to +12 V RL = 2 kΩ, VO = −10 V to +10 V
−14 −20 −60 −14 −20 −60 −12 100 1000
RL = 2 kΩ, −55°C to +125°C RL = 600 Ω RL = 2 kΩ, −55°C to +125°C RL = 600 Ω
13.2 11
110
Output Current Short Circuit Current POWER SUPPLY Power Supply Rejection Ratio Supply Current per Amplifier
PSRR ISY
VS = ±4 V to ±18 V VO = 0 V −55°C < TA < +125°C
DYNAMIC PERFORMANCE Slew Rate Settling Time
SR tS
RL = 2 kΩ To 0.1% (10 V step, G = 1) To 0.01% (10 V step, G = 1)
4 2.2 6.3 10
0.1 Hz to 10 Hz f = 1 kHz f = 1 kHz f = 1 kHz f = 10 kHz
77 2.8 0.3 −130 −105
Gain Bandwidth Product NOISE PERFORMANCE Peak-to-Peak Noise Voltage Noise Density Current Noise Density Channel Separation
IOUT ISC
GBP en p-p en in CS
Rev. 0 | Page 4 of 8
130 3
−13.2 −11
3.5 4.2
dB mA mA V/μs μs μs MHz
100 3.8
nV p-p nV/√Hz pA/√Hz dB dB
Enhanced Product
AD8672-EP
ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE
Table 3. Parameter Supply Voltage Input Voltage Differential Input Voltage Output Short-Circuit Duration Storage Temperature Range Operating Temperature Range Junction Temperature Range Lead Temperature Range (Soldering, 60 sec)
Rating 36 V VS− to VS+ ±0.7 V Indefinite −65°C to +150°C −55°C to +125°C −65°C to +150°C 300°C
Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product reliability.
θJA is specified for the worst-case conditions, that is, θJA is specified for the device soldered on a 4-layer circuit board for surface-mount packages. Table 4. Package Type 8-Lead SOIC_N (R-8)
ESD CAUTION
Rev. 0 | Page 5 of 8
θJA 120
θJC 43
Unit °C/W
AD8672-EP
Enhanced Product
4.0
135
3.5
134
VS = ±2.5V TO ±18V VS = ±15V 133
3.0
VS = ±5V 132
PSRR (dB)
2.0
131
1.5
130
1.0
129
0.5
128
–50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
127 –75
–50
0
25
50
VS = ±5V TA = –55°C TO +125°C
80
60
40
40
MEAN + 3σ
MEAN
–20 –40
MEAN – 3σ
MEAN – 3σ
–60
–60
–80
–80
–25
0
25
50
75
100
125
TEMPERATURE (°C)
–100 –75
13063-102
–50
MEAN
0
–20
–100 –75
MEAN + 3σ
20
VOS (µV)
20
–40
125
VS = ±15V TA = –55°C TO +125°C
80
60
0
100
Figure 5. PSRR vs. Temperature 100
100
75
TEMPERATURE (°C)
Figure 2. Supply Current vs. Temperature
VOS (µV)
–25
–50
–25
0
25
50
100
125
Figure 6. Input Offset Voltage (VOS) vs. Temperature, VS = ±15 V
Figure 3. Input Offset Voltage (VOS) vs. Temperature, VS = ±5 V
16
25
75
TEMPERATURE (°C)
13063-105
0 –75
13063-104
2.5
13063-101
SUPPLY CURRENT (mA)
TYPICAL PERFORMANCE CHARATERISTICS
VS = ±5V TA = –55°C TO +125°C
VS = ±15V TA = –55°C TO +125°C
14
NUMBER OF AMPLIFIERS
15
10
12 10 8 6 4
5
TCVOS (µV/°C)
TCVOS (µV/°C)
Figure 7. Input Offset Voltage Drift (TCVOS) Distribution, VS = ±15 V
Figure 4. Input Offset Voltage Drift (TCVOS) Distribution, VS = ±5 V
Rev. 0 | Page 6 of 8
13063-106
0 13063-103
0
–0.50 –0.45 –0.40 –0.35 –0.30 –0.25 –0.20 –0.15 –0.10 –0.05 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
2
–0.50 –0.45 –0.40 –0.35 –0.30 –0.25 –0.20 –0.15 –0.10 –0.05 0 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
NUMBER OF AMPLIFIERS
20
Enhanced Product
AD8672-EP 4.0
3.5
VS = ±15V
VS = ±5V 3.5
3.0 –IB
3.0
2.5
IB (nA)
IB (nA)
2.5 2.0 +IB 1.5
–IB 2.0 1.5 +IB
1.0
1.0
0.5
–50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
0 –75
13063-107
0 –75
–25
0
25
50
75
100
125
TEMPERATURE (°C)
Figure 8. Input Bias Current (IB) vs. Temperature, VS = ±5 V 14.5
–50
13063-110
0.5
Figure 11. Input Bias Current (IB) vs. Temperature, VS = ±15 V –11.0
RL = 2kΩ
VS = ±15V
14.0
–11.5
OUTPUT VOLTAGE (V)
13.0 12.5
RL = 600Ω
12.0 11.5
–12.0 –12.5 RL = 600Ω –13.0 –13.5
RL = 2kΩ
11.0 –14.0
10.5 VS = ±15V –50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
–14.5 –75
13063-108
10.0 –75
25000
VS = ±5V 15000
10000 VS = ±15V 5000
0
25
50
75
100
TEMPERATURE (°C)
125
13063-109
AVO (V/mV)
20000
–25
0
25
50
75
100
Figure 12. Output Voltage Low vs. Temperature
30000
–50
–25
TEMPERATURE (°C)
Figure 9. Output Voltage High vs. Temperature
0 –75
–50
Figure 10. Open-Loop Gain (AVO) vs. Temperature
Rev. 0 | Page 7 of 8
125
13063-111
OUTPUT VOLTAGE (V)
13.5
AD8672-EP
Enhanced Product
OUTLINE DIMENSIONS 5.00 (0.1968) 4.80 (0.1890)
8 1
5
6.20 (0.2441) 5.80 (0.2284)
4
1.27 (0.0500) BSC 0.25 (0.0098) 0.10 (0.0040) COPLANARITY 0.10 SEATING PLANE
0.50 (0.0196) 0.25 (0.0099)
1.75 (0.0688) 1.35 (0.0532)
0.51 (0.0201) 0.31 (0.0122)
45°
8° 0° 0.25 (0.0098) 0.17 (0.0067)
1.27 (0.0500) 0.40 (0.0157)
COMPLIANT TO JEDEC STANDARDS MS-012-AA CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS (IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIGN.
012407-A
4.00 (0.1574) 3.80 (0.1497)
Figure 13. 8-Lead Standard Small Outline Package [SOIC_N] Narrow Body (R-8) Dimensions shown in millimeters and (inches)
ORDERING GUIDE Model1 AD8672TRZ-EP AD8672TRZ-EP-R7 1
Temperature Range −55°C to +125°C −55°C to +125°C
Package Description 8-Lead Standard Small Outline Package [SOIC_N] 8-Lead Standard Small Outline Package [SOIC_N]
Z = RoHS Compliant Part.
©2015 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D13063-0-9/15(0)
Rev. 0 | Page 8 of 8
Package Option R-8 R-8
