tA294
MEDICATISOIATION AMPTIFIER
tOW NOISE,WITH ACTTVE
INPUT
REFERT,NCE SHIETD
AND
DRIVES
FEATURES
.
r
r
r
o
o
UL componenl recognized
True inslrumenlation front-end
Aclive input reference
Active shielddrives
Low noise:E sv P-P. .05 to lfi) Hz.
High CMRR: 126dB input to output, 120dB input to
guard
o IsolaledPower: + l5V @ 15 mA
o Small size:,2" 3 "
x
o ExternalSynccapabilityfor multi-channel
monitors
The Model IA294 Isolation Amplifier featuressmall
size,low noise,high common mode rejection,activeguard
and shielddrives.CMRR is 126dB input to output with
impedance.
balanced
source
CMRR from input to active
is
input reference 120dB. This IsolationAmplifier con-
tainsmost of the front-endcircuitrythat is found in
monitor and diagnostic
ECG's. The IA294 hasa true
front-endfor high CMRR, activeright leg
instrumentation
use,isolatedpower
drive, synccapabilityfor multichannel
( + l5 V @ l5 mA) and separate
activedrivesfor either,
individualshielded
inputsor a common outer shield.This
modelalso features
6500V input to output protectionand
6500V differentialinput protectionfor defibrillators.
Input to output leakage
currentis lessthan l0 FA.
BLOCK DIAGRAM
(IA294I
CHARACTERISTICS
(Typical @ 25 'C, V. = + l5 VDC unlessotherwisenoted.)
GAIN (NON.INVERTING)
ACCURACY
vs. Temperature
Non-Linearity
Differential lnput lmpedance
Common-Mode Input Impedance
INPUTVOLTAGE
Max. Safe Differential Input
P u l s e ,l 0 m s D u r a t i o n
Max. Safe Common Mode Input (DC cont.)
INPUT BIAS CURRENT
vs. Temperature
SAFETY CURRENT LIMITS
INPUT NOISE (5 K UNBALANCE)
Voltage .05 to 100Hz, pp
V o l t a g el 0 H z t o I k H z , r m s
Current.05 Hz to I kHz, rms
+ 2Vo
+ . 0 1 9 0 /" C
+ 0 . 19 0
3 x l03Qll3pF
5 x l0''all20pF
+lVmin.
+ 240 V rms
+6500V peak
+ 5000 VDC
+2nA
+ .02 nA/ "C
l0gA max
t0v/v
8rv
5lv
l0 pA
COMMON MODE RE.IECTION
I n p u t t o O u t p u t ,C M V : I l 5 V A C , 6 0 H z
Balanced
SourceImpedance
5kQSourceImbalance
Two Inputs to lnput Reference
C M V : l O V p - p , 6 OH z
5kQ SourceImbalance
OUTPUT
R a n g e( 5 0 k Q L o a d )
Output Impedance
M a x . C M V , O u t p u t st o p o w e r c o m m o n
Offset voltage referred to input
vs. Temperature(0' to 70'C)
vs. Supply Voltage
FREQUENCY RESPONSE
S m a l lS i g n a l , - 3 d B
F u l lP o w e r , 6 V p p
Overload Recovery
ISOLATED POWER OUTPUT
Voltage, + l0 mA load
Accuracy
C u r r e n t ,m i n .
NOMINAL WEIGHT
POWER SUPPLY, SINGLE POLARITY
Voltage Rated Performance
Current, Quiescent
TEMPERATURE RANGE
Rated Performance
Storaee
1 2 6d B
1 2 0d b
1 2 0d B
+l0v
I K\Z
+ 30 V peak
+5 mV
t l00sV/'C
+20 tY/Vo
I kHz
500 Hz
20 msec
t 1 5v D C
x 5Vo
t15mA
8 ounces
t
r 1 4 . 5 o + 1 6V D C
+40rA
SOCKET
0"c to 70"c
2 5 ' Ct o + 8 5 ' C
sl35
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INTRONICS [ INTRONICS POWER, INC. ]
