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AD743KR-16-REEL Datasheet(PDF) 1 Page - Analog Devices

Part # AD743KR-16-REEL
Description  Ultralow Noise BiFET Op Amp
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD743KR-16-REEL Datasheet(HTML) 1 Page - Analog Devices

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CONNECTION DIAGRAMS
REV. C
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.
a
Ultralow Noise
BiFET Op Amp
AD743
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
PRODUCT HIGHLIGHTS
1. The low offset voltage and low input offset voltage drift of
the AD743 coupled with its ultralow noise performance
mean that the AD743 can be used for upgrading many
applications now using bipolar amplifiers.
2. The combination of low voltage and low current noise make
the AD743 ideal for charge sensitive applications such as
accelerometers and hydrophones.
3. The low input offset voltage and low noise level of the
AD743 provide >140 dB dynamic range.
4. The typical 10 kHz noise level of 2.9 nV/
√Hz permits a three
op amp instrumentation amplifier, using three AD743s, to be
built which exhibits less than 4.2 nV/
√Hz noise at 10 kHz
and which has low input bias currents.
100
1k
10k
100k
1
10
100
1000
1M
10M
SOURCE RESISTANCE –
OP27 &
RESISTOR
AD743 + RESISTOR
RESISTOR NOISE ONLY
AD743 & RESISTOR
OR
OP27 & RESISTOR
RSOURCE
RSOURCE
O
E
(
)
(– – –)
( — )
Input Noise Voltage vs. Source Resistance
FEATURES
ULTRALOW NOISE PERFORMANCE
2.9 nV/
√Hz at 10 kHz
0.38
V p-p, 0.1 Hz to 10 Hz
6.9 fA/
√Hz Current Noise at 1 kHz
EXCELLENT DC PERFORMANCE
0.5 mV max Offset Voltage
250 pA max Input Bias Current
1000 V/mV min Open-Loop Gain
AC PERFORMANCE
2.8 V/ s Slew Rate
4.5 MHz Unity-Gain Bandwidth
THD = 0.0003% @ 1 kHz
Available in Tape and Reel in Accordance with
EIA-481A Standard
APPLICATIONS
Sonar Preamplifiers
High Dynamic Range Filters (>140 dB)
Photodiode and IR Detector Amplifiers
Accelerometers
PRODUCT DESCRIPTION
The AD743 is an ultralow noise precision, FET input,
monolithic operational amplifier. It offers a combination of the
ultralow voltage noise generally associated with bipolar input op
amps and the very low input current of a FET-input device.
Furthermore, the AD743 does not exhibit an output phase
reversal when the negative common-mode voltage limit is
exceeded.
The AD743’s guaranteed, maximum input voltage noise of
4.0 nV/
√Hz at 10 kHz is unsurpassed for a FET-input
monolithic op amp, as is the maximum 1.0
µV p-p, 0.1 Hz to
10 Hz noise. The AD743 also has excellent dc performance with
250 pA maximum input bias current and 0.5 mV maximum
offset voltage.
The AD743 is specifically designed for use as a preamp in
capacitive sensors, such as ceramic hydrophones. It is available
in five performance grades. The AD743J and AD743K are rated
over the commercial temperature range of 0
°C to +70°C. The
AD743A and AD743B are rated over the industrial temperature
range of –40
°C to +85°C. The AD743S is rated over the
military temperature range of –55
°C to +125°C and is available
processed to MIL-STD-883B, Rev. C.
The AD743 is available in 8-pin plastic mini-DIP, 8-pin cerdip,
16-pin SOIC, or in chip form.
AD743
8
TOP VIEW
1
2
3
7
6
8
5
4
OUT
NULL
NC
+VS
NULL
–IN
+IN
–V
S
NC = NO CONNECT
OFFSET
NULL
AD743
–IN
+IN
8
1
2
3
4
9
10
11
12
13
14
16
NC
NC
NC
OUTPUT
+V
S
–V S
NC
NC
15
8
7
6
5
NC
OFFSET
NULL
NC
NC
NC
NC = NO CONNECT
8-Pin Plastic Mini-DIP (N)
and
8-Pin Cerdip (Q) Packages
16-Pin SOIC (R) Package


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