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PDF AD8571 Data sheet ( Hoja de datos )
| Número de pieza | AD8571 | |
| Descripción | Rail-to-Rail Input/Output Operational Amplifiers | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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1. AD8571 datasheet pinout  Hay una vista previa y un enlace de descarga de AD8571 (archivo pdf) en la parte inferior de esta página. Total 28 Páginas | ||
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Data Sheet
Zero-Drift, Single-Supply, Rail-to-Rail
Input/Output Operational Amplifiers
AD8571/AD8572/AD8574
FEATURES
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
Medical instrumentation
Thermocouple amplifiers
GENERAL DESCRIPTION
This family of amplifiers has ultralow offset, drift, and bias
current. The AD8571/AD8572/AD85741 are single, dual, and
quad amplifiers, respectively, featuring rail-to-rail input and
output swings. All are guaranteed to operate from 2.7 V to 5 V
single supply.
The AD8571/AD8572/AD8574 provide benefits previously
found only in expensive auto-zeroing or chopper-stabilized
amplifiers. Using Analog Devices, Inc., topology, these zero-
drift amplifiers combine low cost with high accuracy. (No
external capacitors are required.) Using a spread-spectrum,
auto-zero technique, the AD8571/AD8572/AD8574 eliminate
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
AD8571/AD8572/AD8574 are perfectly suited for applications
where error sources cannot be tolerated. Position and pressure
sensors, medical equipment, and strain gage amplifiers benefit
greatly from nearly zero drift over their operating temperature
range. Many more systems require the rail-to-rail input and
output swings provided by the AD8571/AD8572/AD8574.
1 Protected by U.S. Patent 6,130,578.
Rev. F
Document Feedback
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
PIN CONFIGURATIONS
NC 1
8 NC
–IN A 2 AD8571 7 V+
+IN A
3
TOP VIEW
(Not to Scale)
6
OUT A
V– 4
5 NC
NC = NO CONNECT
Figure 1. 8-Lead MSOP (RM Suffix)
NC 1
8 NC
–IN A 2 AD8571 7 V+
+IN A 3 TOP VIEW 6 OUT A
V– 4 (Not to Scale) 5 NC
NC = NO CONNECT
Figure 2. 8-Lead SOIC (R Suffix)
OUT A 1
8 V+
–IN A 2 AD8572 7 OUT B
+IN A
3
TOP VIEW
(Not to Scale)
6
–IN B
V– 4
5 +IN B
Figure 3. 8-Lead TSSOP (RU Suffix)
OUT A 1
8 V+
–IN A 2 AD8572 7 OUT B
+IN A
3
TOP VIEW
(Not to Scale)
6
–IN B
V– 4
5 +IN B
Figure 4. 8-Lead SOIC (R Suffix)
OUT A 1
14 OUT D
–IN A 2
13 –IN D
+IN A 3 AD8574 12 +IN D
V+ 4 TOP VIEW 11 V–
+IN B 5 (Not to Scale) 10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
Figure 5. 14-Lead TSSOP (RU Suffix)
OUT A 1
14 OUT D
–IN A 2
13 –IN D
+IN A 3 AD8574 12 +IN D
V+ 4 TOP VIEW 11 V–
+IN B 5 (Not to Scale) 10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
Figure 6. 14-Lead SOIC (R Suffix)
The AD8571/AD8572/AD8574 are specified for the extended
industrial/ automotive temperature range (−40°C to +125°C).
The AD8571 single amplifier is available in 8-lead MSOP and
narrow SOIC packages. The AD8572 dual amplifier is available in
8-lead narrow SOIC and surface-mount TSSOP packages. The
AD8574 quad amplifier is available in 14-lead narrow SOIC and
TSSOP packages.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©1999–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
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
Input Bias Current
AD8571/AD8574
AD8572
Input Offset Current
AD8571/AD8574
AD8572
Input Voltage Range
Common-Mode Rejection Ratio
Large Signal Voltage Gain1
Offset Voltage Drift
OUTPUT CHARACTERISTICS
Output Voltage High
Symbol
VOS
IB
IOS
CMRR
AVO
∆VOS/∆T
VOH
Output Voltage Low
VOL
Short-Circuit Limit
ISC
Output Current
IO
POWER SUPPLY
Power Supply Rejection Ratio
PSRR
Supply Current per Amplifier
ISY
DYNAMIC PERFORMANCE
Slew Rate
Overload Recovery Time
Gain Bandwidth Product
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
SR
GBP
en p-p
en
in
1 Gain testing is dependent upon test bandwidth.
Conditions
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +85°C
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +85°C
−40°C ≤ TA ≤ +125°C
VCM = 0 V to 2.7 V
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ, VO = 0.3 V to 2.4 V
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
RL = 100 kΩ to GND
RL = 100 kΩ to GND @ −40°C to +125°C
RL = 10 kΩ to GND
RL = 10 kΩ to GND @ −40°C to +125°C
RL = 100 kΩ to V+
RL = 100 kΩ to V+ @ −40°C to +125°C
RL = 10 kΩ to V+
RL = 10 kΩ to V+ @ −40°C to +125°C
−40°C to +125°C
−40°C to +125°C
VS = 2.7 V to 5.5 V
−40°C ≤ TA ≤ +125°C
VO = 0 V
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ
0 Hz to 10 Hz
f = 1 kHz
f = 10 Hz
AD8571/AD8572/AD8574
Min Typ Max Unit
1 5 μV
10 μV
10 50 pA
1.0 1.5 nA
160 300 pA
2.5 4
nA
10 50 pA
150 200 pA
30 150 pA
150 400 pA
0 2.7 V
115 130
dB
110 130
dB
110 140
dB
105 130
dB
0.005 0.04 µV/°C
2.685
2.685
2.67
2.67
±10
2.697
2.696
2.68
2.675
1
2
10
15
±15
±10
±10
±5
10
10
20
20
V
V
V
V
mV
mV
mV
mV
mA
mA
mA
mA
120 130
dB
115 130
dB
750 900 μA
950 1000 μA
0.5 V/μs
0.05 ms
1 MHz
2.0 μV p-p
94 nV/√Hz
2 fA/√Hz
Rev. F | Page 5 of 28
5 Page 
Data Sheet
VS = ±2.5V
RL = 2kΩ
AV = –100
VIN = 60mV p-p
200µs
1V
Figure 31. No Phase Reversal
140
VS = 2.7V
120
100
80
60
40
20
0
100 1k 10k 100k 1M
FREQUENCY (Hz)
Figure 32. CMRR vs. Frequency
140
VS = 5V
120
100
80
60
40
20
0
100
1k 10k 100k 1M
FREQUENCY (Hz)
Figure 33. CMRR vs. Frequency
10M
10M
AD8571/AD8572/AD8574
140
VS = ±1.35V
120
100
80
60
40 –PSRR
+PSRR
20
0
100
1k 10k 100k 1M
FREQUENCY (Hz)
Figure 34. PSRR vs. Frequency
10M
140
VS = ±2.5V
120
100 +PSRR
80
60
40 –PSRR
20
0
100
1k 10k 100k 1M
FREQUENCY (Hz)
Figure 35. PSRR vs. Frequency
10M
3.0
2.5
VS = ±1.35V
RL = 2kΩ
AV = 1
2.0 THD + N < 1%
TA = 25°C
1.5
1.0
0.5
0
100 1k 10k 100k
FREQUENCY (Hz)
Figure 36. Maximum Output Swing vs. Frequency
1M
Rev. F | Page 11 of 28
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet AD8571.PDF ] | |
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