AD704AQ AD [Analog Devices], AD704AQ Datasheet

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AD704AQ

Manufacturer Part Number
AD704AQ
Description
Quad Picoampere Input Current Bipolar Op Amp
Manufacturer
AD [Analog Devices]
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD704AQ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
a
PRODUCT DESCRIPTION
The AD704 is a quad, low power bipolar op amp that has the
low input bias current of a BiFET amplifier but which offers a
significantly lower I
beta bipolar input transistors to achieve picoampere input bias
current levels (similar to FET input amplifiers at room tempera-
ture), while its I
(unlike a BiFET amp, for which I
in a 1000 increase at +125 C). Furthermore the AD704
achieves 75 V offset voltage and low noise characteristics of a
precision bipolar input op amp.
REV. A
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
High DC Precision
Low Noise
Low Power
Chips & MIL-STD-883B Processing Available
Available in Tape and Reel in Accordance
Single Version: AD705, Dual Version: AD706
PRIMARY APPLICATIONS
Industrial/Process Controls
Weigh Scales
ECG/EKG Instrumentation
Low Frequency Active Filters
with EIA-481A Standard
75 V max Offset Voltage
1 V/ C max Offset Voltage Drift
150 pA max Input Bias Current
0.2 pA/ C typical I
0.5 V p-p typical Noise, 0.1 Hz to 10 Hz
600 A max Supply Current per Amplifier
Figure 1. Input Bias Current Over Temperature
0.01
100
0.1
10
1
–55
B
typically only increases by 5 at +125 C
B
drift over temperature. It utilizes Super-
B
TEMPERATURE – C
Drift
+25
B
TYPICAL JFET AMP
doubles every 10 C resulting
AD704T
+125
OUTPUT
OUTPUT
14-Pin Cerdip (Q) Packages
Since it has only 1/20 the input bias current of an AD OP07, the
AD704 does not require the commonly used “balancing”
resistor. Furthermore, the current noise is 1/5 that of the
AD OP07 which makes the AD704 usable with much higher
source impedances. At 1/6 the supply current (per amplifier) of
the AD 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 and is available
in five performance grades. The AD704J and AD704K are rated
over the commercial temperature range of 0 C to +70 C. The
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Quad Picoampere Input Current
AD704A and AD704B are rated over the industrial temperature
of –40 C to +85 C. The AD704T is rated over the military
temperature range of –55 C to +125 C and is available
processed to MIL-STD-883B, Rev. C.
+
+
+V
–IN
–IN
IN
IN
14-Pin Plastic DIP (N)
S
1
2
5
6
3
7
4
1
AD704
(TOP VIEW)
2
+IN2
+IN1
+V
NC
NC
S
6
8
4
5
7
CONNECTION DIAGRAMS
3
4
3
9
14
13
12
10
11
AMP 2
AMP 1
9
8
10
2
OUTPUT
–IN
+
–V
+
–IN
OUTPUT
(E) Package
AD704
IN
IN
S
11
1
AMP 4
AMP 3
20
12
OUTPUT
OUTPUT
Bipolar Op Amp
19
13
+
+V
+
–IN
–IN
NC
IN
IN
S
20-Terminal LCC
NC = NO CONNECT
1
5
2
3
4
6
7
8
17
15
18
16
14
NC = NO CONNECT
16-Pin SOIC
(R) Package
NC
+IN3
+IN4
NC
–V
AD704
(TOP VIEW)
1
2
S
AD704
Fax: 617/326-8703
4
3
13
12
11
10
16
15
14
9
OUTPUT
–V
+
–IN
NC
–IN
+
OUTPUT
IN
IN
S

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