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PDF AD8675 Data sheet ( Hoja de datos )
| Número de pieza | AD8675 | |
| Descripción | Rail-to-Rail Output Op Amp | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
FEATURES
Very low voltage noise: 2.8 nV/√Hz
Rail-to-rail output swing
Low input bias current: 2 nA maximum
Very low offset voltage: 75 µV maximum
Low input offset drift: 0.6 µV/°C maximum
Very high gain: 120 dB
Wide bandwidth: 10 MHz typical
±5 V to ±18 V operation
APPLICATIONS
Precision instrumentation
PLL filters
Laser diode control loops
Strain gage amplifiers
Medical instrumentation
Thermocouple amplifiers
GENERAL DESCRIPTION
The AD8675 precision operational amplifier has ultralow offset,
drift, and voltage noise combined with very low input bias currents
over the full operating temperature range. The AD8675 is a
precision, wide bandwidth op amp featuring rail-to-rail output
swings and very low noise. Operation is fully specified from
±5 V to ±15 V.
The AD8675 features a rail-to-rail output like that of the OP184,
but with wide bandwidth and even lower voltage noise, combined
with the precision and low power consumption like that of the
industry-standard OP07 amplifier. Unlike other low noise, rail-
to-rail op amps, the AD8675 has very low input bias current
and low input current noise.
With typical offset voltage of only 10 µV, offset drift of 0.2 µV/°C,
and noise of only 0.10 μV p-p (0.1 Hz to 10 Hz), the AD8675 is
perfectly suited for applications where large error sources cannot
be tolerated. For applications with even lower offset tolerances,
the proprietary nulling capability allows a combination of both
device and system offset errors up to 3.5 mV (referred to the
input) to be compensated externally. Unlike previous circuits,
the AD8675 accommodates this adjustment without adversely
affecting the offset drift, CMRR, and PSRR of the amplifier.
Precision instrumentation, PLL, and other precision filter circuits,
position and pressure sensors, medical instrumentation, and
strain gage amplifiers benefit greatly from the very low noise,
low input bias current, and wide bandwidth. Many systems can
36 V Precision, 2.8 nV/√Hz
Rail-to-Rail Output Op Amp
AD8675
PIN CONFIGURATIONS
NULL 1
8 NULL
–IN 2 AD8675 7 V+
+IN 3 TOP VIEW 6 OUT
V– 4 (Not to Scale) 5 NC
NC = NO CONNECT
Figure 1. 8-Lead SOIC_N (R-8)
NULL 1
–IN 2
+IN 3
V– 4
AD8675
TOP VIEW
(Not to Scale)
8 NULL
7 V+
6 OUT
5 NC
NC = NO CONNECT
Figure 2. 8-Lead MSOP (RM-8)
take advantage of the low noise, dc precision, and rail-to-rail
output swing provided by the AD8675 to maximize SNR and
dynamic range.
The smaller packages and low power consumption afforded by
the AD8675 allow maximum channel density or minimum
board size for space-critical equipment.
The AD8675 is specified for the extended industrial temperature
range (−40°C to +125°C). The AD8675 amplifier is available in
the tiny 8-lead MSOP, and the popular 8-lead, narrow SOIC,
RoHS compliant packages. MSOP packaged devices are only
available in tape and reel format.
For the dual version of this ultraprecision, rail-to-rail op amp,
see the AD8676 data sheet.
The AD8675 and AD8676 are members of a growing series of
low noise op amps offered by Analog Devices, Inc.
Table 1. Voltage Noise
Package 0.9 nV 1.1 nV
Single AD797 AD8597
Dual
AD8599
Quad
1.8 nV
ADA4004-1
ADA4004-2
ADA4004-4
2.8 nV
AD8675
AD8676
3.8 nV
AD8671
AD8672
AD8674
Rev. E
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2005–2012 Analog Devices, Inc. All rights reserved.
1 page  
AD8675
Data Sheet
VS = ±15 V, VCM = 0 V, VO = 0 V, TA = +25°C, unless otherwise specified.
Table 3.
Parameter
INPUT CHARACTERISTICS
Offset Voltage
Offset Voltage Drift
Input Bias Current
Input Offset Current
Input Voltage Range
Common-Mode Rejection Ratio
Open-Loop Gain
Symbol
VOS
ΔVOS/ΔT
IB
IOS
IVR
CMRR
AVO
Input Capacitance, Common Mode
Input Capacitance, Differential Mode
OUTPUT CHARACTERISTICS
Output Voltage High
CINCM
CINDM
VOH
Output Voltage Low
VOL
Short-Circuit Limit
POWER SUPPLY
Power Supply Rejection Ratio
Supply Current/Amplifier
DYNAMIC PERFORMANCE
Slew Rate
Gain Bandwidth Product
NOISE PERFORMANCE
Voltage Noise
Voltage Noise Density
Current Noise Density
ISC
PSRR
ISY
SR
GBP
en p-p
en
in
Test Conditions/Comments
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
−40°C ≤ TA ≤ +125°C
VCM = −12.5 V to +12.5 V
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to ground,
VO = −13.5 V to +13.5 V
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ to ground
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to ground
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ to ground
−40°C ≤ TA ≤ +125°C
RL = 2 kΩ to ground
−40°C ≤ TA ≤ +125°C
VS = ±5.0 V to ±15.0 V
−40°C ≤ TA ≤ +125°C
VO = 0 V
−40°C ≤ TA ≤ +125°C
RL = 10 kΩ
0.1 Hz to 10 Hz
f = 1 kHz
f = 10 Hz
Min
−2
−4.5
−1
−2.8
−12.5
114
114
123
117
14.85
14.80
14.60
14.40
120
120
Typ
10
12
0.2
+0.5
+1
+0.1
+0.1
130
132
3.8
9.6
14.92
14.80
−14.96
−14.85
±35
140
2.5
2.5
10
0.1
2.8
0.3
Max Unit
75
240
0.6
+2
+4.5
+1
+2.8
+12.5
µV
µV
µV/°C
nA
nA
nA
nA
V
dB
dB
dB
dB
pF
pF
−14.94
−14.90
−14.75
−14.69
V
V
V
V
V
V
V
V
mA
dB
dB
2.9 mA
3.8 mA
V/µs
MHz
µV p-p
nV/√Hz
pA/√Hz
Rev. E | Page 4 of 12
5 Page 
AD8675
0.01
RL = 2kΩ
VIN = 1V rms
AV = +1
BW = 80kHz
0.001
0.0001
VS = 5V
VS = 15V
0.00001
10
100 1k 10k
FREQUENCY (Hz)
Figure 27. Distortion vs. Frequency
100k
VIN VSY = ±15V
AV = 1
VOUT
Data Sheet
12
VSY = ±15V
AV = 1
10
8
6
4
2
0
0246
SETTLING TIME TO 0.01% (µs)
Figure 29. Output Step vs. Settling Time to 0.01%
8
Figure 28. No Phase Reversal
Rev. E | Page 10 of 12
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AD8675.PDF ] | |
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