
1
CA3260, CA3260A
4MHz, BiMOS Operational Amplifier with
MOSFET Input/CMOS Output
CA3260A and CA3260 are integrated circuit operational
amplifiers that combine the advantage of both CMOS and
bipolar transistors on a monolithic chip. The CA3260 series
circuits are dual versions of the popular CA3160 series.
Gate protected P-Channel MOSFET (PMOS) transistors are
used in the input circuit to provide very high input
impedance, very low input current, and exceptional speed
performance. The use of PMOS field effect transistors in the
input stage results in common mode input voltage capability
down to 0.5V below the negative supply terminal, an
important attribute in single supply applications.
A complementary symmetry MOS (CMOS) transistor pair,
capable of swinging the output voltage to within 10mV of
either supply voltage terminal (at very high values of load
impedance), is employed as the output circuit.
The CA3260 Series circuits operate at supply voltages
ranging from 4V to 16V, or
±
2V to
±
8V when using split
supplies. The CA3260A offers superior input characteristics
over those of the CA3260.
Pinout
CA3260, CA3260A (PDIP)
TOP VIEW
Features
MOSFET Input Stage provides
- Very High Z
I
= 1.5T
(1.5 x 10
12
) (Typ)
- Very Low I
I
. . . . . . . . . . . . 5pA (Typ) at 15V Operation
. . . . . . . . . . . . . . . . . . . . . . 2pA (Typ) at 5V Operation
Ideal for Single Supply Applications
Common Mode Input Voltage Range Includes
Negative Supply Rail; Input Terminals Can be Swung 0.5V
Below Negative Supply Rail
CMOS Output Stage Permits Signal Swing to Either (Or
Both) Supply Rails
Applications
Ground Referenced Single Supply Amplifiers
Fast Sample-Hold Amplifiers
Long Duration Timers/Monostables
Ideal Interface with Digital CMOS
High Input Impedance Wideband Amplifiers
Voltage Followers (e.g. Follower for Single Supply D/A
Converter)
Voltage Regulators (Permits Control of Output Voltage
Down to 0V)
Wien Bridge Oscillators
Voltage Controlled Oscillators
Photo Diode Sensor Amplifiers
NON INV. INPUT (A)
V-
1
2
3
8
7
6
5
V+
OUTPUT (B)
INV. INPUT (B)
NON INV. INPUT (B)
OUTPUT (A)
A
4
B
+
-
+
-
INV. INPUT (A)
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
NO.
CA3260E
-55 to 125
8 Ld PDIP
E8.3
CA3260AE
-55 to 125
8 Ld PDIP
E8.3
Data Sheet
September 1998
File Number
1266.4
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
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Copyright
Intersil Corporation 1999