AD647 AD [Analog Devices], AD647 Datasheet
AD647
Manufacturer Part Number
AD647
Description
Ultralow Drift, Dual BiFET Op Amp
Manufacturer
AD [Analog Devices]
Datasheet
1.AD647.pdf
(6 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD647AR
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Company:
Part Number:
AD647SE/883B-Q
Manufacturer:
AMD
Quantity:
9
a
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.
PRODUCT DESCRIPTION
The AD647 is an ultralow drift, dual JFET amplifier that com-
bines high performance and convenience in a single package.
The AD647 uses the most advanced ion-implantation and laser
wafer drift trimming technologies to achieve the highest perfor-
mance currently available in a dual JFET. Ion-implantation per-
mits the fabrication of matched JFETs on a monolithic bipolar
chip. Laser wafer drift trimming trims both the initial offset volt-
age and its drift with temperature to provide offsets as low as
100 V (250 V max) and drifts of 2.5 V/ C max.
In addition to outstanding individual amplifier performance, the
AD647 offers guaranteed and tested matching performance on
critical parameters such as offset voltage, offset voltage drift and
bias currents.
The high level of performance makes the AD647 especially well
suited for high precision instrumentation amplifier applications
that previously would have required the costly selection and
matching of space wasting single amplifiers.
The AD647 is offered in four performance grades, three com-
mercial (the J, K and L) and one extended (the S). All are sup-
plied in hermetically sealed 8-pin TO-99 packages and are
available processed to MIL-STD-883B. The LCC version is
also available processed to MIL-STD-883B.
FEATURES
Low Offset Voltage Drift
Matched Offset Voltage
Matched Offset Voltage Over Temperature
Matched Bias Currents
Crosstalk: –124 dB at 1 kHz
Low Bias Current: 35 pA max Warmed Up
Low Offset Voltage: 250 V max
Low Input Voltage Noise: 2 V p-p
High Open Loop Gain: 108 dB
Low Quiescent Current: 2.8 mA max
Low Total Harmonic Distortion
Standard Dual Amplifier Pinout
Available in Hermetic Metal Can Package, Hermetic
MIL-STD-883B Processing Also Available
Single Version Available: AD547
Surface Mount (20-Pin LCC) and Chip Form
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
PRODUCT HIGHLIGHTS
1. The AD647 is guaranteed and tested to tight matching speci-
2. Laser wafer drift trimming reduces offset voltage and offset
3. Voltage noise is guaranteed at 4 V p-p max (0.1 Hz to
4. Bias current (35 pA K, L, S; 75 pA J) is specified after five
5. Total supply current is a low 2.8 mA max.
6. High open loop gain ensures high linearity in precision instru-
7. The standard dual amplifier pinout permits the direct substi-
8. The AD647 is available in chip form.
fications to ensure high performance and to eliminate the se-
lection and matching of single devices.
voltage drifts to 250 V and 2.5 V/ C max.
10 Hz) on K, L and S grades.
minutes of operation.
mentation amplifier applications.
tution of the AD647 for lower performance devices.
Dual BiFET Op Amp
Ultralow Drift,
AD647
Fax: 617/326-8703
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AD647 Summary of contents
Page 1
... MIL-STD-883B Processing Also Available Single Version Available: AD547 PRODUCT DESCRIPTION The AD647 is an ultralow drift, dual JFET amplifier that com- bines high performance and convenience in a single package. The AD647 uses the most advanced ion-implantation and laser wafer drift trimming technologies to achieve the highest perfor- mance currently available in a dual JFET ...
Page 2
... AD647LH AD647SH AD647SE AD647SE/883BH Units V/V V MHz kHz V p-p nV/ Hz nV/ Hz nV/ Hz nV/ Hz ...
Page 3
... REV. A Typical Characteristics–AD647 –3– ...
Page 4
... AD647 –4– REV. A ...
Page 5
... AD7546 used as a dual precision buffer. Here the offset voltage match, low offset voltage and high open loop gain of the AD647 ensure monoto- nicity and high linearity over the entire operating temperature range. A2 serves a dual function amplifier Track and Hold circuit that deglitches the DAC output and amplifier B acts as an output amplifier ...
Page 6
... The use of an AD647L as the input amplifier A1, guarantees maximum offset voltage of 250 V, drift of 2 and bias currents of 35 pA. A2 serves two less critical functions in the amplifier and, therefore can be an AD647J. Amplifier ac- = 0.00 V. Next OUT tive data guard which increases ac CMRR and minimizes extra- ...