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CA3420 Schematic ( PDF Datasheet ) - Intersil Corporation

Teilenummer CA3420
Beschreibung 0.5MHz/ Low Supply Voltage/ Low Input Current BiMOS Operational Amplifiers
Hersteller Intersil Corporation
Logo Intersil Corporation Logo 




Gesamt 6 Seiten
CA3420 Datasheet, Funktion
TM
Data Sheet
CA3420, CA3420A
April 2000 File Number 1320.6
0.5MHz, Low Supply Voltage, Low Input
Current BiMOS Operational Amplifiers
The CA3420A and CA3420 are integrated circuit operational
amplifiers that combine PMOS transistors and bipolar
transistors on a single monolithic chip. The CA3420A and
CA3420 BiMOS operational amplifiers feature gate
protected PMOS transistors in the input circuit to provide
very high input impedance, very low input currents (less than
1pA). The internal bootstrapping network features a unique
guardbanding technique for reducing the doubling of leakage
current for every 10oC increase in temperature. The CA3420
series operates at total supply voltages from 2V to 20V
either single or dual supply. These operational amplifiers are
internally phase compensated to achieve stable operation in
the unity gain follower configuration. Additionally, they have
access terminals for a supplementary external capacitor if
additional frequency roll-off is desired. Terminals are also
provided for use in applications requiring input offset voltage
nulling. The use of PMOS in the input stage results in
common mode input voltage capability down to 0.45V below
the negative supply terminal, an important attribute for single
supply application. The output stage uses a feedback OTA
type amplifier that can swing essentially from rail-to-rail. The
output driving current of 1.5mA (Min) is provided by using
nonlinear current mirrors.
Ordering Information
PART NUMBER
CA3420AT
CA3420E
TEMP.
RANGE (oC)
PACKAGE
-55 to 125 8 Pin Metal Can
-55 to 125 8 Ld PDIP
PKG.
NO.
T8.C
E8.3
Features
• 2V Supply at 300µA Supply Current
• 1pA Input Current (Typ) (Essentially Constant to 85oC)
• Rail-to-Rail Output Swing (Drive ±2mA into 1kLoad)
• Pin Compatible with 741 Operational Amplifiers
Applications
• pH Probe Amplifiers
• Picoammeters
• Electrometer (High Z) Instruments
• Portable Equipment
• Inaccessible Field Equipment
• Battery-Dependent Equipment (Medical and Military)
Functional Diagram
X1
-
MOS
BIPOLAR
+
X1
BUFFER AMPS;
BOOTSTRAPPED
INPUT PROTECTION
NETWORK
HIGH GAIN
(50K)
MOS
BIPOLAR
OTA BUFFER
(X2)
Pinouts
CA3420 (PDIP)
TOP VIEW
OFFSET NULL 1
INV.
INPUT
2
NON-INV. 3
INPUT
V- 4
-
+
8 STROBE
7 V+
6 OUTPUT
5 OFFSET NULL
CA3420 (METAL CAN)
TOP VIEW
OFFSET NULL
1
TAB
8
STROBE
7 V+
INV.
INPUT
2
-
+
6 OUTPUT
NON-INV. 3
INPUT
4
5 OFFSET NULL
V-
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil and Design is a trademark of Intersil Corporation. | Copyright © Intersil Corporation 2000






CA3420 Datasheet, Funktion
CA3420, CA3420A
Metal Can Packages (Can)
A
ØD ØD1
REFERENCE PLANE
L
L2
L1
A
A
Øe
e1
ØD2
2N
1
k1
Øb1 β α
F Øb
k CL
Q BASE AND
SEATING PLANE
BASE METAL LEAD FINISH
Øb1
Øb2
SECTION A-A
NOTES:
1. (All leads) Øb applies between L1 and L2. Øb1 applies between
L2 and 0.500 from the reference plane. Diameter is uncontrolled
in L1 and beyond 0.500 from the reference plane.
2. Measured from maximum diameter of the product.
3. α is the basic spacing from the centerline of the tab to terminal 1
and β is the basic spacing of each lead or lead position (N -1
places) from α, looking at the bottom of the package.
4. N is the maximum number of terminal positions.
5. Dimensioning and tolerancing per ANSI Y14.5M - 1982.
6. Controlling dimension: INCH.
T8.C MIL-STD-1835 MACY1-X8 (A1)
8 LEAD METAL CAN PACKAGE
INCHES
MILLIMETERS
SYMBOL MIN MAX MIN MAX NOTES
A
0.165
0.185
4.19
4.70
-
Øb
0.016
0.019
0.41
0.48
1
Øb1
0.016
0.021
0.41
0.53
1
Øb2
0.016
0.024
0.41
0.61
-
ØD
0.335
0.375
8.51
9.40
-
ØD1
0.305
0.335
7.75
8.51
-
ØD2
0.110
0.160
2.79
4.06
-
e 0.200 BSC
5.08 BSC
-
e1 0.100 BSC
2.54 BSC
-
F
- 0.040 - 1.02
-
k
0.027
0.034
0.69
0.86
-
k1
0.027
0.045
0.69
1.14
2
L
0.500
0.750 12.70
19.05
1
L1 - 0.050 - 1.27 1
L2 0.250 - 6.35 - 1
Q
0.010
0.045
0.25
1.14
α 45o BSC
45o BSC
β 45o BSC
45o BSC
-
3
3
N8
84
Rev. 0 5/18/94
All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification.
Intersil semiconductor products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time with-
out notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries 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 Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see web site www.intersil.com
Sales Office Headquarters
NORTH AMERICA
Intersil Corporation
P. O. Box 883, Mail Stop 53-204
Melbourne, FL 32902
TEL: (321) 724-7000
FAX: (321) 724-7240
EUROPE
Intersil SA
Mercure Center
100, Rue de la Fusee
1130 Brussels, Belgium
TEL: (32) 2.724.2111
FAX: (32) 2.724.22.05
ASIA
Intersil (Taiwan) Ltd.
7F-6, No. 101 Fu Hsing North Road
Taipei, Taiwan
Republic of China
TEL: (886) 2 2716 9310
FAX: (886) 2 2715 3029
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