AD8574-EP Data Sheet

Zero-Drift, Single-Supply, Rail-to-Rail I/O
Quad, Operational Amplifier
AD8574-EP
Supports defense and aerospace applications (AQEC
standard)
Military 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
Low offset voltage: 1 µV
Input offset drift: 0.005 µV/°C
Rail-to-rail input and output swing
5 V/2.7 V single-supply operation
High gain: 145 dB typical
CMRR: 140 dB typical
PSRR: 130 dB typical
Ultralow input bias current: 10 pA typical
Low supply current: 750 µA per op amp
Overload recovery time: 50 µs
No external capacitors required
APPLICATIONS
Temperature sensors
Pressure sensors
Precision current sensing
Strain gage amplifiers
PIN CONFIGURATIONS
OUT A 1
14
OUT D
–IN A 2
13
–IN D
+IN A 3
AD8574-EP
12
+IN D
TOP VIEW
(Not to Scale)
11
V–
10
+IN C
–IN B 6
9
–IN C
OUT B 7
8
OUT C
V+ 4
+IN B 5
09302-003
FEATURES
Figure 1. 14-Lead TSSOP (RU Suffix)
The AD8574-EP provides benefits previously found only in
expensive auto-zeroing or chopper-stabilized amplifiers. Using
a patented spread-spectrum, auto-zero technique, the AD8574
eliminates the intermodulation effects from interaction of the
chopping function with the signal frequency in ac applications.
With an offset voltage of only 1 µV and drift of 0.005 µV/°C, the
AD8574-EP is perfectly suited for applications where error
sources must be minimized.
The AD8574-EP is specified for the military temperature range
(−55°C to +125°C). The AD8574-EP quad amplifier is available in
a 14-lead TSSOP package.
Additional applications and technical information is available in
the AD8571/AD8572/AD8574 data sheets.
GENERAL DESCRIPTION
This amplifier has ultralow offset, drift, and bias current. The
AD8574-EP is a quad amplifier, featuring rail-to-rail input and
output swings. It is guaranteed to operate from 2.7 V to 5 V
single supply.
Rev. 0
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
www.analog.com
Tel: 781.329.4700
Fax: 781.461.3113
©2010 Analog Devices, Inc. All rights reserved.
AD8574-EP
TABLE OF CONTENTS
Features .............................................................................................. 1
2.7 V Electrical Characteristics ...................................................4
Applications ....................................................................................... 1
Absolute Maximum Ratings ............................................................5
General Description ......................................................................... 1
Thermal Characteristics ...............................................................5
Pin Configurations ........................................................................... 1
ESD Caution...................................................................................5
Revision History ............................................................................... 2
Typical Performance Characteristics ..............................................6
Specifications..................................................................................... 3
Outline Dimensions ....................................................................... 14
5 V Electrical Characteristics ...................................................... 3
Ordering Guide .......................................................................... 14
REVISION HISTORY
8/10—Revision 0: Initial Version
Rev. 0 | Page 2 of 16
AD8574-EP
SPECIFICATIONS
5 V ELECTRICAL CHARACTERISTICS
VS = 5 V, VCM = 2.5 V, VO = 2.5 V, TA = 25°C, unless otherwise noted.
Table 1.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
Min
VOS
Typ
Max
Unit
1
5
15
50
1.5
70
200
5
0.04
μV
μV
pA
nA
pA
pA
V
dB
dB
dB
dB
μV/°C
10
10
V
V
V
V
mV
mV
−55°C ≤ TA ≤ +125°C
Input Bias Current
IB
10
1.0
20
150
−55°C ≤ TA ≤ +125°C
Input Offset Current
IOS
−55°C ≤ TA ≤ +125°C
Input Voltage Range
Common-Mode Rejection Ratio
CMRR
Large Signal Voltage Gain 1
AVO
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Output Voltage Low
∆VOS/∆T
VOH
VOL
VCM = 0 V to 5 V
−55°C ≤ TA ≤ +125°C
RL = 10 kΩ, VO = 0.3 V to 4.7 V
−55°C ≤ TA ≤ +125°C
−55°C ≤ TA ≤ +125°C
RL = 100 kΩ to GND
RL = 100 kΩ to GND @ −55°C to +125°C
RL = 10 kΩ to GND
RL = 10 kΩ to GND @ −55°C to +125°C
RL = 100 kΩ to V+
RL = 100 kΩ to V+ @ −55°C to +125°C
0
120
115
125
120
4.99
4.99
4.95
4.95
RL = 10 kΩ to V+
RL = 10 kΩ to V+ @ −55°C to +125°C
Short-Circuit Limit
ISC
±25
−55°C to +125°C
Output Current
IO
−55°C to +125°C
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Overload Recovery Time
Gain Bandwidth Product
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
1
PSRR
ISY
SR
VS = 2.7 V to 5.5 V
−55°C ≤ TA ≤ +125°C
VO = 0 V
−55°C ≤ TA ≤ +125°C
RL = 10 kΩ
GBP
en p-p
en
in
0 Hz to 10 Hz
0 Hz to 1 Hz
f = 1 kHz
f = 10 Hz
Gain testing is dependent upon test bandwidth.
Rev. 0 | Page 3 of 16
120
115
140
130
145
135
0.005
4.998
4.997
4.98
4.975
1
2
10
15
±50
±40
±30
±15
130
130
850
1000
0.4
0.05
1.5
1.3
0.41
51
2
30
30
975
1075
0.3
mV
mV
mA
mA
mA
mA
dB
dB
μA
μA
V/μs
ms
MHz
μV p-p
μV p-p
nV/√Hz
fA/√Hz
AD8574-EP
2.7 V ELECTRICAL CHARACTERISTICS
VS = 2.7 V, VCM = 1.35 V, VO = 1.35 V, TA = 25°C, unless otherwise noted.
Table 2.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Symbol
Conditions
Min
VOS
Typ
Max
Unit
1
5
15
50
1.5
50
200
2.7
μV
μV
pA
nA
pA
pA
V
dB
dB
dB
dB
µV/°C
−55°C ≤ TA ≤ +125°C
Input Bias Current
IB
10
1.0
10
150
−55°C ≤ TA ≤ +125°C
Input Offset Current
IOS
−55°C ≤ TA ≤ +125°C
Input Voltage Range
Common-Mode Rejection Ratio
CMRR
Large Signal Voltage Gain1
AVO
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
∆VOS/∆T
VOH
Output Voltage Low
VOL
Short-Circuit Limit
ISC
VCM = 0 V to 2.7 V
−55°C ≤ TA ≤ +125°C
RL = 10 kΩ, VO = 0.3 V to 2.4 V
−55°C ≤ TA ≤ +125°C
−55°C ≤ TA ≤ +125°C
RL = 100 kΩ to GND
RL = 100 kΩ to GND @ −55°C to +125°C
RL = 10 kΩ to GND
RL = 10 kΩ to GND @ −55°C to +125°C
RL = 100 kΩ to V+
RL = 100 kΩ to V+ @ −55°C to +125°C
RL = 10 kΩ to V+
RL = 10 kΩ to V+ @ −55°C to +125°C
0
115
110
110
105
2.685
2.685
2.67
2.67
±10
−55°C to +125°C
Output Current
IO
−55°C to +125°C
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current per Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Overload Recovery Time
Gain Bandwidth Product
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
1
PSRR
ISY
SR
VS = 2.7 V to 5.5 V
−55°C ≤ TA ≤ +125°C
VO = 0 V
−55°C ≤ TA ≤ +125°C
2.697
2.696
2.68
2.675
1
2
10
15
±15
±10
±10
±5
130
130
750
950
0.04
10
10
20
20
900
1000
V
V
V
V
mV
mV
mV
mV
mA
mA
mA
mA
dB
dB
μA
μA
RL = 10 kΩ
0.5
0.05
1
V/μs
ms
MHz
0 Hz to 10 Hz
f = 1 kHz
f = 10 Hz
2.0
94
2
μV p-p
nV/√Hz
fA/√Hz
GBP
en p-p
en
in
120
115
130
130
140
130
0.005
Gain testing is dependent upon test bandwidth.
Rev. 0 | Page 4 of 16
AD8574-EP
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage 1
ESD (Human Body Model)
Output Short-Circuit Duration to GND
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 60 sec)
1
Rating
6V
GND to VS + 0.3 V
±5.0 V
2000 V
Indefinite
−65°C to +150°C
−55°C to +125°C
−65°C to +150°C
300°C
Differential input voltage is limited to ±5.0 V or the supply voltage,
whichever is less.
Stresses 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 indicated in the operational section of
this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
THERMAL CHARACTERISTICS
θJA is specified for the worst-case conditions, that is, θJA is
specified for a device soldered in a circuit board for TSSOP
packages.
Table 4. Thermal Resistance
Package Type
14-Lead TSSOP (RU)
ESD CAUTION
Rev. 0 | Page 5 of 16
θJA
180
θJC
36
Unit
°C/W
AD8574-EP
TYPICAL PERFORMANCE CHARACTERISTICS
180
VS = 2.7V
VCM = 1.35V
TA = 25°C
NUMBER OF AMPLIFIERS
140
120
100
80
60
140
120
100
80
60
40
40
20
20
0
–2.5
–1.5
–0.5
0.5
1.5
VS = 5V
VCM = 2.5V
TA = 25°C
160
0
–2.5
09302-007
2.5
OFFSET VOLTAGE (µV)
–1.5
–0.5
0.5
Figure 2. Input Offset Voltage Distribution
12
VS = 5V
TA = –40°C, +25°C, +85°C
40
VS = 5V
VCM = 2.5V
TA = –40°C TO +125°C
10
30
NUMBER OF AMPLIFIERS
INPUT BIAS CURRENT (pA)
2.5
Figure 5. Input Offset Voltage Distribution
50
+85°C
20
10
+25°C
0
–10
–40°C
1
2
3
4
INPUT COMMON-MODE VOLTAGE (V)
5
09302-008
0
8
6
4
2
–20
–30
1.5
OFFSET VOLTAGE (µV)
0
0
1
2
3
4
5
6
INPUT OFFSET DRIFT (nV/°C)
09302-011
NUMBER OF AMPLIFIERS
160
09302-010
180
Figure 6. Input Offset Voltage Drift Distribution
Figure 3. Input Bias Current vs. Input Common-Mode Voltage
10k
1500
VS = 5V
TA = 125°C
VS = 5V
TA = 25°C
1000
OUTPUT VOLTAGE (mV)
0
–500
–1000
100
SOURCE
10
SINK
1
–2000
0
1
2
3
4
COMMON-MODE VOLTAGE (V)
5
0.1
0.0001
0.001
0.01
0.1
1
10
LOAD CURRENT (mA)
Figure 7. Output Voltage to Supply Rail vs. Load Current
Figure 4. Input Bias Current vs. Common-Mode Voltage
Rev. 0 | Page 6 of 16
100
09302-012
–1500
09302-009
INPUT BIAS CURRENT (pA)
1k
500
AD8574-EP
10k
800
VS = 2.7V
TA = 25°C
SUPPLY CURRENT PER AMPLIFIER (µA)
TA = 25°C
SINK
SOURCE
10
1
0.001
0.01
0.1
1
10
100
LOAD CURRENT (mA)
400
300
200
100
0
09302-013
0.1
0.0001
500
1
2
3
4
5
6
SUPPLY VOLTAGE (V)
Figure 11. Supply Current per Amplifier vs. Supply Voltage
Figure 8. Output Voltage to Supply Rail vs. Load Current
60
1000
VCM = 2.5V
VS = 5V
VS = 2.7V
CL = 0pF
RL = ∞
50
750
OPEN-LOOP GAIN (dB)
INPUT BIAS CURRENT (pA)
0
09302-016
100
600
500
250
40
0
30
45
20
90
10
135
0
180
–10
225
–20
270
PHASE SHIFT (Degrees)
OUTPUT VOLTAGE (mV)
1k
700
–25
0
25
50
75
100
125
150
TEMPERATURE (°C)
–40
10k
09302-014
–50
1M
10M
100M
FREQUENCY (Hz)
Figure 12. Open-Loop Gain and Phase Shift vs. Frequency
Figure 9. Input Bias Current vs. Temperature
60
VS = 5V
CL = 0pF
RL = ∞
50
5V
OPEN-LOOP GAIN (dB)
0.8
2.7V
0.6
0.4
0.2
40
0
30
45
20
90
10
135
0
180
–10
225
–20
270
PHASE SHIFT (Degrees)
1.0
0
–75
–50
–25
0
25
50
75
100
TEMPERATURE (°C)
125
150
–40
10k
100k
1M
10M
100M
FREQUENCY (Hz)
Figure 10. Supply Current vs. Temperature
Figure 13. Open-Loop Gain and Phase Shift vs. Frequency
Rev. 0 | Page 7 of 16
09302-018
–30
09302-015
SUPPLY CURRENT (mA)
100k
09302-017
–30
0
–75
AD8574-EP
60
300
VS = 2.7V
CL = 20pF
RL = 2kΩ
50
270
VS = 5V
240
OUTPUT IMPEDANCE (Ω)
AV = 100
30
20
AV = 10
10
0
AV = 1
–10
210
180
150
AV = 100
120
90
–20
60
–30
30
AV = 10
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 14. Closed-Loop Gain vs. Frequency
0
100
1k
10k
100k
1M
10M
FREQUENCY (Hz)
Figure 17. Output Impedance vs. Frequency
60
CLOSED-LOOP GAIN (dB)
40
30
VS = 2.7V
CL = 300pF
RL = 2kΩ
AV = 1
VS = 5V
CL = 20pF
RL = 2kΩ
50
AV = 100
20
AV = 10
10
0
AV = 1
–10
–30
2µs
1k
10k
100k
1M
10M
FREQUENCY (Hz)
500mV
09302-020
–40
100
09302-023
–20
Figure 18. Large Signal Transient Response
Figure 15. Closed-Loop Gain vs. Frequency
300
270
VS = 5V
CL = 300pF
RL = 2kΩ
AV = 1
VS = 2.7V
210
180
AV = 100
150
120
AV = 10
90
30
0
100
AV = 1
1k
10k
100k
1M
FREQUENCY (Hz)
5µs
10M
1V
Figure 19. Large Signal Transient Response
Figure 16. Output Impedance vs. Frequency
Rev. 0 | Page 8 of 16
09302-024
60
09302-021
OUTPUT IMPEDANCE (Ω)
240
09302-022
AV = 1
–40
100
09302-019
CLOSED-LOOP GAIN (dB)
40
AD8574-EP
45
VS = ±1.35V
CL = 50pF
RL = ∞
AV = 1
50mV
+OS
30
25
20
–OS
15
10
5
0
10
100
1k
10k
CAPACITANCE (pF)
Figure 23. Small Signal Overshoot vs. Load Capacitance
Figure 20. Small Signal Transient Response
VS = ±2.5V
CL = 50pF
RL = ∞
AV = 1
0V
VS = ±2.5V
VIN = –200mV p-p
(RET TO GND)
CL = 0pF
RL = 10kΩ
AV = –100
VIN
VOUT
0V
20µs
1V
09302-029
50mV
09302-026
5µs
BOTTOM SCALE: 1V/DIV
TOP SCALE: 200mV/DIV
Figure 21. Small Signal Transient Response
Figure 24. Positive Overvoltage Recovery
50
VS = ±1.35V
RL = 2kΩ
TA = 25°C
VIN
40
0V
35
30
+OS
25
0V
–OS
20
VS = ±2.5V
VIN = 200mV p-p
(RET TO GND)
CL = 0pF
RL = 10kΩ
AV = –100
15
VOUT
5
0
10
20µs
100
1k
CAPACITANCE (pF)
10k
1V
BOTTOM SCALE: 1V/DIV
TOP SCALE: 200mV/DIV
Figure 25. Negative Overvoltage Recovery
Figure 22. Small Signal Overshoot vs. Load Capacitance
Rev. 0 | Page 9 of 16
09302-030
10
09302-027
SMALL SIGNAL OVERSHOOT (%)
45
09302-028
5µs
VS = ±2.5V
RL = 2kΩ
TA = 25°C
35
09302-025
SMALL SIGNAL OVERSHOOT (%)
40
AD8574-EP
140
VS = ±2.5V
RL = 2kΩ
AV = –100
VIN = 60mV p-p
VS = ±1.35V
120
PSRR (dB)
100
80
60
40
0
100
1k
10k
100k
1M
10M
1M
10M
FREQUENCY (Hz)
Figure 29. PSRR vs. Frequency
Figure 26. No Phase Reversal
140
140
VS = ±2.5V
120
100
100
80
60
80
60
40
40
20
20
1k
10k
100k
1M
10M
FREQUENCY (Hz)
+PSRR
0
100
–PSRR
1k
10k
100k
FREQUENCY (Hz)
Figure 27. CMRR vs. Frequency
09302-035
PSRR (dB)
120
09302-032
CMRR (dB)
VS = 2.7V
0
100
09302-034
1V
+PSRR
20
09302-031
200µs
–PSRR
Figure 30. PSRR vs. Frequency
140
3.0
VS = 5V
120
2.5
OUTPUT SWING (V p-p)
80
60
40
1.5
1.0
1k
10k
100k
FREQUENCY (Hz)
1M
10M
Figure 28. CMRR vs. Frequency
0
100
1k
10k
100k
FREQUENCY (Hz)
Figure 31. Maximum Output Swing vs. Frequency
Rev. 0 | Page 10 of 16
1M
09302-036
0
100
2.0
VS = ±1.35V
RL = 2kΩ
AV = 1
THD + N < 1%
TA = 25°C
0.5
20
09302-033
CMRR (dB)
100
AD8574-EP
5.5
VS = ±2.5V
RL = 2kΩ
AV = 1
THD + N < 1%
TA = 25°C
5.0
312
4.0
en (nV/ Hz)
3.5
3.0
2.5
2.0
1.5
260
208
156
104
1.0
52
1k
10k
100k
1M
FREQUENCY (Hz)
0
0.5
1.0
1.5
2.0
2.5
FREQUENCY (kHz)
Figure 32. Maximum Output Swing vs. Frequency
09302-040
0
100
09302-037
0.5
Figure 35. Voltage Noise Density from 0 Hz to 2.5 kHz
VS = ±1.35V
AV = 120,000
VS = 2.7V
RS = 0Ω
112
en (nV/ Hz)
96
0V
80
64
48
32
50mV
0
5
10
15
20
25
FREQUENCY (kHz)
Figure 33. 0.1 Hz to 10 Hz Noise
09302-041
16
09302-038
1sec
Figure 36. Voltage Noise Density from 0 Hz to 25 kHz
VS = ±2.5V
AV = 120,000
VS = 5V
RS = 0Ω
182
en (nV/ Hz)
156
130
104
78
52
50mV
26
0
0.5
1.0
1.5
2.0
FREQUENCY (kHz)
Figure 34. 0.1 Hz to 10 Hz Noise
Figure 37. Voltage Noise Density from 0 Hz to 2.5 kHz
Rev. 0 | Page 11 of 16
2.5
09302-042
1sec
09302-039
OUTPUT SWING (V p-p)
4.5
VS = 2.7V
RS = 0Ω
364
AD8574-EP
50
en (nV/ Hz)
96
80
64
48
32
0
5
10
15
20
25
FREQUENCY (kHz)
VS = 2.7V
30
ISC–
20
10
0
–10
ISC+
–20
–30
–40
–50
–75
09302-043
16
40
–50
–25
0
25
50
75
100
125
150
TEMPERATURE (°C)
09302-046
112
OUTPUT SHORT-CIRCUIT CURRENT (mA)
VS = 5V
RS = 0Ω
Figure 41. Output Short-Circuit Current vs. Temperature
Figure 38. Voltage Noise Density from 0 Hz to 25 kHz
100
150
120
90
60
0
5
10
FREQUENCY (Hz)
09302-044
30
60
ISC–
40
20
0
–20
–40
ISC+
–60
–80
–100
–75
–50
–25
0
25
50
75
100
125
150
TEMPERATURE (°C)
Figure 39. Voltage Noise Density from 0 Hz to 10 Hz
Figure 42. Output Short-Circuit Current vs. Temperature
250
150
225
VS = 2.7V TO 5.5V
VS = 2.7V
200
OUTPUT VOLTAGE (mV)
145
140
135
175
150
RL = 1kΩ
125
100
75
50
130
RL = 10kΩ
RL = 100kΩ
25
125
–75
–50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
150
09302-045
POWER SUPPLY REJECTION (dB)
VS = 5V
0
–75
–50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
Figure 43. Output Voltage to Supply Rail vs. Temperature
Figure 40. Power Supply Rejection vs. Temperature
Rev. 0 | Page 12 of 16
150
09302-048
en (nV/ Hz)
180
80
09302-047
OUTPUT SHORT-CIRCUIT CURRENT (mA)
VS = 5V
RS = 0Ω
210
AD8574-EP
250
225
VS = 5V
175
RL = 1kΩ
150
125
100
75
50
RL = 10kΩ
RL = 100kΩ
25
0
–75
–50
–25
0
25
50
75
100
125
TEMPERATURE (°C)
150
09302-049
OUTPUT VOLTAGE (mV)
200
Figure 44. Output Voltage to Supply Rail vs. Temperature
Rev. 0 | Page 13 of 16
AD8574-EP
OUTLINE DIMENSIONS
5.10
5.00
4.90
14
8
4.50
4.40
4.30
6.40
BSC
1
7
PIN 1
0.65 BSC
1.20
MAX
0.15
0.05
COPLANARITY
0.10
0.30
0.19
0.20
0.09
8°
0°
SEATING
PLANE
COMPLIANT TO JEDEC STANDARDS MO-153-AB-1
0.75
0.60
0.45
061908-A
1.05
1.00
0.80
Figure 45. 14-Lead Thin Shrink Small Outline Package [TSSOP]
(RU-14)
Dimensions shown in millimeters
ORDERING GUIDE
Model
AD8574TRU-EP
AD8574TRU-EP-RL
Temperature Range
−55°C to +125°C
−55°C to +125°C
Package Description
14-Lead TSSOP
14-Lead TSSOP
Rev. 0 | Page 14 of 16
Package Option
RU-14
RU-14
AD8574-EP
NOTES
Rev. 0 | Page 15 of 16
AD8574-EP
NOTES
©2010 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D09302-0-8/10(0)
Rev. 0 | Page 16 of 16
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