IA294 MEDICAL ISOLATION AMPLIFIER

IA294
MEDICAL ISOLATION AMPLIFIER
Low Noise, with Active Input
Reference and Shield Drives
FEATURES
•
UL Component Recognized
•
True Instrumentation Front-End
•
Active Input Reference
CHARACTERISTICS
•
Active Shield Drives
(Typical, @ 25°C, Vs = +15 VDC unless otherwise noted.)
•
Low Noise: 8µV P-P, .05 to 100Hz
•
High CMRR: 126 dB Input to Output,
•
Isolated Power: ±15V @ 15mA
GAIN (Non-inverting)
ACCURACY
Vs. Temperature
Nonlinearity
Differential Input Impedance
Common Mode Input Impedance
10V / V
±2%
±. 01%/°C
±0.1%
3 X 108Ω || 3pF
3 X 1010Ω || 20pF
•
Small Size: 2” x 3”
•
External Sync Capability for Multi-Channel Monitors
INPUT VOLTAGE
Max. Safe Differential Input
Pulse, 10ms Duration
Max. Safe Common Mode Input (DC cont.)
±1V min.
±240V rms.
±6500V peak
±5000VDC
INPUT BIAS CURRENT
Vs. Temperature (0 to + 70°C)
±2nA
±0.02nA/°C
SAFETY CURRENT LIMITS
10µA max.
INPUT NOISE (5K UNBALANCE)
Voltage .05Hz to 100Hz, pp
Voltage 10Hz to 1kHz, rms.
Current .05Hz to 1kHz, rms.
8µV
5µV
5pA
120 dB Input to Guard
The Model IA294 Isolation Amplifier features small size, low
noise, high common mode rejection, active guard and shield drives.
CMRR is 126 dB input to output with balanced source impedance.
CMRR from input to active input reference is 120 dB. This isolation
amplifier contains most of the front-end circuitry that is found in
COMMON MODE REJECTION
Input to Output, CMV = 115 VAC, 60Hz
Balanced Source Impedance
5KΩ Source Imbalance
Two Inputs to Input Reference
CMV = 10V p-p, 60Hz
5KΩ Source Imbalance
monitor and diagnostic ECG’s. The IA294 has a true instrumentation
front-end for high CMRR, active right leg drive, sync capability for
multichannel use, isolated power (±15V @ 15mA) and separate
126 dB
120 dB
120 dB
active drives for either individual shielded inputs or a common outer
shield. This model also features 6500V input to output protection and
6500V differential input protection for defibrillators. Input to output
leakage is less than 10µA.
OUTPUT
Range (50KΩ Load)
Output Impedance
Max. CMV, Outputs to Power Common
Offset Voltage Referred to Input
Vs. Temperature (0° to 70°C)
Vs. Supply Voltage
±10V
1 KΩ
± 30 V peak
± 5mV
± 100µV / °C
± 20µV / %
FREQUENCY RESPONSE
Small Signal, - 3 dB
Full Power, 6V pp
Overload Recovery
1kHz
500Hz
20mS
ISOLATED POWER OUTPUTS
Voltage, ±10mA Load
Accuracy
Current, min.
±15VDC
±5%
± 15mA
NOMINAL WEIGHT
8 Ounces
POWER SUPPLY, SINGLRE POLARITY
Voltage, Rated Performance
Current, Quiescent
±14.5 to +16 VDC
+ 40 mA
TEMPERATURE RANGE
Rated Performance
Storage
0°C to +70°C
-25°C to +85°C
MATING SOCKET
S135
BLOCK DIAGRAM IA294
+SHIELD
+IN
+
+
Modulator
-
Demodulator
-
Filter
HI OUT
LO OUT
CM SHIELD
+
-
-IN
-SHIELD
Modulator
Driver
+
Demodulator
Driver
+
IN REF
DC-DC
Converter
+Vs
COMMON
-Vs
+Vs
Oscillator
COMMON
SYNC
.62 (15.75)
MAX.
3023 (76.71)
MAX.
MODEL IA294
.20 (5.06)
MIN.
7
+ IN
.04 (1.02)
DIA.
2.02 (51.31)
MAX.
8
9
HI OUT
10
LO OUT
11
SYNC
12
COM OUT
+15
13
14
-S.D. +S.D.
6
- IN
5
4
S.D. COM
REF IN
3
+Vs
2
1
Vs COM
-Vs
BOTTOM VIEW