File
No.
1774
/,
I
except that
the
fdrward
transfer charac
terrstic
IS
best described
by
transconductance
rather than voltage gain, and the output
IS
current,
not
voltage.
The rnagn~tude
~f
rhe
output
current
IS
equal
to
the
product
of
tranxonductance
and
the Input voltage.
Phis
type
of operational tran~onductance
ampl~fier
was
flrsa ~ntroduced
by
RCA
rn
1e,and
r?
has
srnce
gained w~de
acceptance
as
s
gateable.
gain-controlled building block
for
instrurnentat~on
and
audio applrcatlons,
such
as
linear~zation
of
transducer outputs,
nandardizatlon OF widely changkng
signals
for
data
processing,
rnultiplexrng,
instru-
rnentat~on
amplifiers
operating
from
the
nanoQower range
to
h~gh current and high-
speed
comparators.
"OTA Obsalet~CDp
Amp,"
by
C.F.
Whestley
and
M.A.
W~trlinger,
N
ECProceedings.
Decernhr.
1989.
The
CA3280
and
CA3280A
are suppl~ed
tn
the
16-lead
dual-ln-line
Gold-CHIP
plastic
package
(G
suff~x). The operat~ng-tempera-
twre
rang=
are
-g5
to
+125'~
for
the
W280A.
and
0
to
+70"~
for
the CA3280.
The
CA3280
1s
also supplied
as
a
herrnet~c
Gold-CHIP
(HG
suft~xl.
Vol~ntrolld
fihera
a
Vdtavntmlled
oscicillrton
Muitiplien
Dernodulaton
1
Sample
and
bld
rn
Instrumemation
arnplifimrs
Function
gmermon
r
Triangle
mwtto-sine
me
convenen
hmpemon
Audio
preamplifiers
Ig
.A1
LINEhAlfATIOH
+YI.AI
A1
EYtTTER
-Vr,AI
mm.
MI
Vf,*l
V-
CUTPUT
41
PIC
OUTPUT 192
TAM,
A2
V*.A2
A2
EMITTER
-Y=,&Z
ID.
A2
LMaRtIAf
lDN
+V1.
A2
MAXIMUM
RAT
l
MGS.
Absolute-Maximum
Values:
DC SUPPLY VOLTAGE
(BEWEEN
Y+
AND
V-TERMINALS)
.
DIFFERENTIAL INPUT
VOLTAGE.
.........
M3
INPUT VOLTAGE
RANGE
...........
INPUT SIGNAL
CURRENT
AT
ID
=
0
.........
AMPLIFIER
&)AS
CURRENT
...........
.........
OUTPUT
SHORT
ClRCUlT
DURATIONA
.......
LINEARIZING DIODE
BIAS
CURRENT. I
PEAK
INPUT
CURRENT WITH LINEARI~NG
DIODE
...
POWER
DISSIPATION, PD:
Eithar
Ampliflm
...............
Tor?!
Packap
...............
Abaus
5sPc
...............
AMBIENT
TEMPERATURE
RANGE,TA:
Operating:
...............
CA3ZgO
...............
CA3280A
Storage. All
Types
...........---
LEADTEMPERATURE [DURING 5OLDERINGl:
At
dirtence
1116
?I132
in.
11.59
3.79
mml
............
frorncax
for
tarec.
mk.
*
Short
circurt
nay
beamlid
to
ground
or
to
eithw
svwly
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