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AD8512BR

Part # AD8512BR
Description OP AMP DUAL GP 15V 8SOIC N -Rail/Tube
Category IC
Availability In Stock
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Analog Devices
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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

Precision, Very Low Noise, Low Input Bias Current,
Wide Bandwidth JFET Operational Amplifiers
AD8510/AD8512/AD8513
Rev. E
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.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
FEATURES
Fast settling time: 500 ns to 0.1%
Low offset voltage: 400 µV max
Low T
C
V
OS
: 1 µV/°C typ
Low input bias current: 25 pA typ
Dual-supply operation: ±5 V to ±15 V
Low noise: 8 nV/√Hz
Low distortion: 0.0005%
No phase reversal
Unity gain stable
APPLICATIONS
Instrumentation
Multipole filters
Precision current measurement
Photodiode amplifiers
Sensors
Audio
PIN CONFIGURATIONS
AD8512
OUT
A
–IN A
+IN A
V–
V+
OUT B
–IN B
+IN B
1
TOP VIEW
(Not to Scale)
4
8
5
02729-D-001
AD8512
TOP VIEW
(Not to Scale)
OUT
A
–IN A
+IN A
V–
V+
OUT B
–IN B
+IN B
02729-D-002
Figure 1. 8-Lead MSOP (RM Suffix) Figure 2. 8-Lead SOIC (R Suffix)
AD8510
TOP VIEW
(Not to Scale)
NC
–IN
+IN
V–
NC
V+
OUT
NC
02729-D-003
AD8510
TOP VIEW
(Not to Scale)
NC
–IN
+IN
V–
NC
V+
OUT
NC
02729-D-004
Figure 3. 8-Lead MSOP (RM Suffix) Figure 4. 8-Lead SOIC (R Suffix)
AD8513
TOP VIEW
(Not to Scale)
OUT
A
1
–IN A
2
+IN A
3
V+
4
+IN B
5
OUT D
–IN D
+IN D
V–
+IN C
14
13
12
11
10
–IN B
6
O
UT B
7
–IN C
OUT C
9
8
02729-D-005
AD8513
TOP VIEW
(Not to Scale)
OUT
A
1
–IN A
+IN A
V+
+IN B
OUT D
–IN D
+IN D
V–
+IN C
14
–IN B
OUT B
7
–IN C
OUT C
8
02729-D-006
Figure 5. 14-Lead SOIC (R Suffix) Figure 6. 14-Lead TSSOP (RU Suffix)
GENERAL DESCRIPTION
The AD8510, AD8512, AD8513 are single-, dual-, and quad-
precision JFET amplifiers that feature low offset voltage, input
bias current, input voltage noise, and input current noise.
The combination of low offsets, low noise, and very low input
bias currents makes these amplifiers especially suitable for high
impedance sensor amplification and precise current measure-
ments using shunts. The combination of dc precision, low noise,
and fast settling time results in superior accuracy in medical
instruments, electronic measurement, and automated test
equipment. Unlike many competitive amplifiers, the AD8510/
AD8512/AD8513 maintain their fast settling performance even
with substantial capacitive loads. Unlike many older JFET
amplifiers, the AD8510/AD8512/ AD8513 do not suffer from
output phase reversal when input voltages exceed the maximum
common-mode voltage range.
Fast slew rate and great stability with capacitive loads make the
AD8510/AD8512/AD8513 a perfect fit for high performance
filters. Low input bias currents, low offset, and low noise result
in a wide dynamic range of photodiode amplifier circuits. Low
noise and distortion, high output current, and excellent speed
make the AD8510/AD8512/AD8513 a great choice for audio
applications.
The AD8510/AD8512 are both available in 8-lead narrow SOIC
and 8-lead MSOP packages. MSOP packaged parts are only
available in tape and reel. The AD8513 is available in 14-lead
SOIC and TSSOP packages.
The AD8510/AD8512/AD8513 are specified over the –40°C to
+125°C extended industrial temperature range.
AD8510/AD8512/AD8513
Rev. E | Page 2 of 20
TABLE OF CONTENTS
Specifications............................................................................................3
Electrical Characteristics............................................................. 4
Absolute Maximum Ratings ..................................................................6
ESD Caution.................................................................................. 6
Typical Performance Characteristics ....................................................7
General Application Information........................................................13
Input Overvoltage Protection ................................................... 13
Output Phase Reversal............................................................... 13
THD + Noise............................................................................... 13
Total Noise Including Source Resistors................................... 13
Settling Time............................................................................... 14
Overload Recovery Time .......................................................... 14
Capacitive Load Drive ............................................................... 14
Open-Loop Gain and Phase Response.................................... 15
Precision Rectifiers..................................................................... 16
I-V Conversion Applications .................................................... 17
Outline Dimensions ..............................................................................19
Ordering Guide .......................................................................... 20
REVISION HISTORY
6/04—Data Sheet Changed from Rev. D to Rev. E
Changes to Format.............................................................Universal
Changes to Specifications................................................................ 3
Updated Outline Dimensions ....................................................... 19
10/03—Data Sheet Changed from Rev. C to Rev. D
Added AD8513 Model ......................................................Universal
Changes to Specifications................................................................ 3
Added Figures 36 through 40........................................................ 10
Added new Figures 55 and 57....................................................... 17
Changes to Ordering Guide .......................................................... 20
9/03—Data Sheet Changed from Rev. B to Rev. C
Changes to Ordering Guide ........................................................... 4
Updated Figure 2 ............................................................................ 10
Changes to Input Overvoltage Protection section .................... 10
Changes to Figures 10 and 11 ....................................................... 12
Changes to Photodiode Circuits section ..................................... 13
Changes to Figures 13 and 14 ....................................................... 13
Deleted Precision Current Monitoring section .......................... 14
Updated Outline Dimensions ...................................................... 15
3/03—Data Sheet Changed from Rev. A to Rev. B
Updated Figure 5 ............................................................................ 11
Updated Outline Dimensions....................................................... 15
8/02—Data Sheet Changed from Rev. 0 to Rev. A
Added AD8510 Model.......................................................Universal
Added Pin Configurations ...............................................................1
Changes to Specifications.................................................................2
Changes to Ordering Guide .............................................................4
Changes to TPCs 2 and 3..................................................................5
Added new TPCs 10 and 12.............................................................6
Replaced TPC 20 ...............................................................................8
Replaced TPC 27 ...............................................................................9
Changes to General Application Information Section .............. 10
Changes to Figure 5........................................................................ 11
Changes to I-V Conversion Applications Section...................... 13
Changes to Figures 13 and 14 ....................................................... 13
Changes to Figure 17...................................................................... 14
AD8510/AD8512/AD8513
Rev. E | Page 3 of 20
SPECIFICATIONS
@ V
S
= ±5 V, V
CM
= 0 V, T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter Symbol Conditions Min Typ Max Unit
INPUT CHARACTERISTICS
Offset Voltage (B Grade)
1
V
OS
0.08 0.4 mV
−40°C < T
A
< +125°C 0.8 mV
Offset Voltage (A Grade) V
OS
0.1 0.9 mV
−40°C < T
A
< +125°C 1.8 mV
Input Bias Current I
B
21 75 pA
−40°C < T
A
< +85°C 0.7 nA
−40°C < T
A
< +125°C 7.5 nA
Input Offset Current I
OS
5 50 pA
−40°C < T
A
< +85°C 0.3 nA
−40°C < T
A
< +125°C 0.5 nA
Input Capacitance
Differential 12.5 pF
Common-Mode 11.5 pF
Input Voltage Range −2.0 +2.5 V
Common-Mode Rejection Ratio CMRR V
CM
= −2.0 V to +2.5 V 86 100 dB
Large Signal Voltage Gain A
VO
R
L
= 2 kΩ, V
O
= −3 V to +3 V 65 107 V/mV
Offset Voltage Drift (B Grade)
1
∆V
OS
/∆T 0.9 5 µV/°C
Offset Voltage Drift (A Grade) ∆V
OS
/∆T 1.7 12 µV/°C
OUTPUT CHARACTERISTICS
Output Voltage High V
OH
R
L
= 10 kΩ +4.1 +4.3 V
Output Voltage Low V
OL
−40°C < T
A
< +125°C −4.9 −4.7 V
Output Voltage High V
OH
R
L
= 2 kΩ, +3.9 + 4.2 V
Output Voltage Low V
OL
−40°C < T
A
< +125°C −4.9 −4.5 V
Output Voltage High V
OH
R
L
= 600 Ω +3.7 +4.1 V
Output Voltage Low V
OL
−40°C < T
A
< +125°C −4.8 −4.2 V
Output Current I
OUT
± 40 ± 54 mA
POWER SUPPLY
Power Supply Rejection Ratio PSRR V
S
= ±4.5 V to ±18 V 86 130 dB
Supply Current/Amplifier I
SY
AD8510/AD8512/AD8513 V
O
= 0 V 2.0 2.3 mA
AD8510/AD8512 −40°C < T
A
< +125°C 2.5 mA
AD8513 −40°C < T
A
< +125°C 2.75 mA
DYNAMIC PERFORMANCE
Slew Rate SR R
L
= 2 kΩ 20 V/µs
Gain Bandwidth Product GBP 8 MHz
Settling Time t
S
To 0.1%, 0 V to 4 V Step, G = +1 0.4 µs
THD + Noise THD + N 1 kHz, G = +1, R
L
= 2 kΩ 0.0005 %
Phase Margin Φ
O
44.5 Degrees
NOISE PERFORMANCE
Voltage Noise Density e
n
f = 10 Hz 34 nV/√Hz
f = 100 Hz 12 nV/√Hz
f = 1 kHz 8.0 10 nV/√Hz
f = 10 kHz 7.6 nV/√Hz
Peak-to-Peak Voltage Noise e
n
p-p 0.1 Hz to 10 Hz Bandwidth 2.4 5.2 µV p-p
1
AD8510/AD8512 only.
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