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AD704JR-16-REEL Fiches technique(PDF) 1 Page - Analog Devices

No de pièce AD704JR-16-REEL
Description  Picoampere Input Current Quad Bipolar Op Amp
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Fabricant  AD [Analog Devices]
Site Internet  http://www.analog.com
Logo AD - Analog Devices

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Picoampere Input Current Quad
Bipolar Op Amp
AD704
Rev.
E
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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
©
2001-2010 Analog Devices, Inc. All rights reserved.
FEATURES
High dc precision
150 µV maximum offset voltage
1.5 µV/°C maximum offset voltage drift
270 pA maximum input bias current
0.3 pA/°C typical IB drift
Low noise: 0.5 µV p-p
Typical noise: 0.1 Hz to 10 Hz
Low power: 600 µA maximum supply current per amplifier
Dual version: AD706
APPLICATIONS
Industrial/process controls
Weigh scales
ECG/EKG instrumentation
Low frequency active filters
GENERAL DESCRIPTION
The AD704 is a quad, low power bipolar op amp that has the
low input bias current of a BiFET amplifier and offers a signifi-
cantly lower IB drift over temperature. It uses superbeta bipolar
input transistors to achieve picoampere input bias current levels
(similar to FET input amplifiers at room temperature), while its
IB typically increases only by 5× at 125°C (unlike a BiFET amp,
for which IB doubles every 10°C, resulting in a 1000× increase at
125°C). In addition, the AD704 achieves 150 μV offset voltage and
the low noise characteristics of a precision bipolar input op amp.
Because it has only 1/20 the input bias current of an OP07, the
AD704 does not require the commonly used balancing resistor.
Furthermore, the current noise is 1/5 that of the OP07, which
makes the AD704 usable with much higher source impedances.
At 1/6 the supply current (per amplifier) of the OP07, the
AD704 is better suited for today’s higher density circuit boards
and battery-powered applications.
The AD704 is an excellent choice for use in low frequency active
filters in 12- and 14-bit data acquisition systems, in precision
instrumentation, and as a high quality integrator. The AD704 is
internally compensated for unity gain stability. The AD704J is
rated over the commercial temperature range of 0°C to 70°C.
The AD704A is rated over the industrial temperature of −40°C
to +85°C. The AD704S is rated over the military temperature
range of −55°C to +125°C, processed to MIL-STD-883B.
CONNECTION DIAGRAMS
OUTPUT
1
–IN
2
+IN
3
+VS 4
OUTPUT
14
–IN
13
+IN
12
–VS
11
+IN
5
–IN
6
OUTPUT
7
+IN
10
–IN
9
OUTPUT
8
1
4
2
3
AD704
TOP VIEW
(Not to Scale)
OUTPUT
1
–IN
2
+IN
3
+VS 4
OUTPUT
16
–IN
15
+IN
14
–VS
13
+IN
5
–IN
6
OUTPUT
7
8
+IN
12
–IN
11
OUTPUT
NC
NC
10
9
1
4
2
3
AD704
TOP VIEW
(Not to Scale)
NC = NO CONNECT
Figure 1. 14-Lead Plastic DIP (N)
Figure 2. 16-Lead SOIC (R) Package
4
+IN1
5
NC
6
+VS
7
NC
8
+IN2
NC = NO CONNECT
18
+IN4
17
NC
16
–VS
15
NC
14
+IN3
13
12
11
10
9
19
20
1
2
3
1
4
2
3
AD704
TOP VIEW
(Not to Scale)
Figure 3. 20-Terminal LCC
(E-20-1) Package
100
10
1
0.1
0.01
–55
25
125
TEMPERATURE (°C)
TYPICAL JFET AMP
AD704
Figure 4. Input Bias Current Over Temperature
Table 1. Low IB @ 125°C
Model
30V
16V
1.3 to 5V
Next Generation
Single
N/A
AD8663
AD8603
N/A
Dual
AD706
AD8667
AD8607
AD8622
Quad
AD704
AD8669
AD8609
AD8624


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