FEATURES
UL Component Recognized (IA184)
Provision for External Synchronization
High Linearity: 0.025% Peak, Typical
2500V Input/output Isolation
126dB Common-Mode Rejection
1000:1 Programmable Gain
Small Size: only 1.5" x 1.5" x 0.63"
BLOCK DIAGRAM IA184
The Model IA184 Isolation Amplifier is an ultra-compact
module offering high linearity, 2500-Volt input/output isolation, 126dB
common-mode rejection, externally programmable gain, a floating
internal supply for powering an external transducer, and external
synchronization of the internal oscillator used in obtaining the input
isolation. Its 0.1% linearity assures compatibility with 10-bit data
acquisition systems, and input voltage noise is held to 1
V, 10Hz to
1kHz, with 10pA maximum current noise for the same range. The
internal oscillator used to provide modulation and demodulation for
input isolation can be synchronized with those of associated Model
IA184 amplifiers by an external trigger, to prevent imposition of beat-
frequency phenomena on the output signal. An independent 15 DC,
15mA supply in the input section, with the same voltage isolation as
the input, can be used to power an external transducer or
preamplifier.
CHARACTERISTICS
(Typical, @ 25
C, Vs = +15 VDC unless otherwise noted.)
GAIN (Non-inverting)
Range
1 to 1000V/V
Formula
Gain = (1 + 100K
Rg )
Deviation from Formula
3%
Vs. Temperature (0 to +70
C)
0.015%/
C
Nonlinearity, G = 1V/V to 10V/V
@
5V,
0.025%
@
10V,
0.1%
@
10V,
0.2% max.
INPUT VOLTAGE RATINGS
Linear Differential Range, G = 1V/V
10V min.
Max. Safe Differential Input
Continuous
125V rms.
Pulse, 10ms Duration, 1 Pulse/10 Sec
600V pk max.
Max. CMV, Inputs to Outputs
AC, 60HZ, 1 Minute Duration
2500V rms.
Pulse, 10mS Duration, 1 Pulse/10sec
2500V pk max.
With 510
in Series with Guard
5000V pk max.
Continuos, AC or DC
2500V pk max.
CMR, Inputs to Outputs, 60Hz, Rs<5K
Balanced Source Impedance
126dB
5K
Source Imbalance
120dB
CMR, Inputs to Guard, 60Hz
1K
Source Imbalance
80dB
Max. Leakage Current, Inputs to Power
Common @115VAC, 60Hz
1.2
A rms. max.
INPUT IMPEDANCE
Differential
10
8
|| 3pF
Overload
27K
Common Mode
5 x 10
10
|| 20pF
INPUT BIAS CURRENT
Initial, @ +25
C
2nA
Vs. Temperature (0 to + 70
C)
0.01nA/
C
INPUT NOISE
Voltage
0.05Hz to 10Hz
3
V p-p
10Hz to 1kHz
1
V rms.
Current
0.05Hz to 10Hz
5pA p-p
10Hz to 1KHz
10pA rms.
FREQUENCY RESPONSE
Small Signal, -3dB G = 1V/V to 10V/V
1kHz
Full Power, 10V p-p Output
Gain = 1V/V
500HZ
Gain = 10V/V
500Hz
Recovery Time to 100
V after application of
600V pk differential input ulse
50mS
OFFSET VOLTAGE, REFERRED TO INPUT
Initial, @ +25
C
(1 + 5/G)mV
Vs. Temperature (0 to + 70
C)
Gain = 1 V/V (
V/
C max.)
65
Gain = 100V/V (
V/
C max.)
15
At other Gains (
V/
C max.)
(15 + 50/G)
Vs. Supply Voltage
(1 + 50/G)
V/V
RATED OUTPUT
Voltage, 50K
Load
10V min.
Output Impedance
1k
Max. CMV, Output Common to Power Common,
Peak AC or DC Continuous
50V pk.
ISOLATED POWER OUTPUTS
Voltage, 5mA Load
15VDC
Accuracy
5%
Current
15mA min.
Regulation, No Load to Full Load
+0, -3%
Ripple, 100kHz Bandwidth
100mV p-p
POWER SUPPLY, SINGLE POLARITY
Voltage, Rated Performance
+15VDC, .5V
Voltage, Operating
+(8 to 15.5)VDC
Current, Quiescent
20mA
Current, Full Load
50mA
External Sync. Frequency
33 to 37 kHz, 5VDC @
50% duty cycle
TEMPERATURE RANGE
Rated Performance
0 to +70
C
Storage
-55
C to +85
C
CASE DIMENSIONS
1.5" x 1.5" x .62"
MATING SOCKET
S134
NOMINAL WEIGHT
1.3 ounces
CONNECTION NOTES:
1.
Gain adjustment resistor (Rg) is connected between GAIN and LO-IN
pins.
2.
If no output-offset adjustment is required, connect LO-OUT to
COMMON pin. Otherwise, consult factory.
IA184 LOW-COST, HIGH-LINEARITY
ISOLATION AMPLIFIER WITH
EXTERNAL SYNC CAPABILITY
Fully compatible with 10-Bit Acquisition Systems
HI IN
GAIN
ADJ
SHIELD
GUARD
LO IN
+VsOUT
-VsOUT
INNER
INPUT
SHIELD
OUTER INPUT
SHIELD
FULL-WAVE
MODU-
LATOR
MODU-
LATOR
DRIVE
DC-DC
CONVERTER
FULL-WAVE
DEMODU-
LATOR
DEMODU-
LATOR
DRIVE
OSCIL-
LATOR
FILTER
HI OUT
LO OUT
+Vs
COM
OUTPUT SHIELD
SYNC
1.52
(38.61)
MAX.
.64
(16.26)
MAX.
.20 (5.08)
MIN.
.04 (1.02)
DIA.
MODEL
IA184
GAIN ADJ
SHIELD
GUARD
+Vs
LO IN
-Vs
+IN
HI OUT
LO OUT
COM
+15
6
5
4
3
2
1
11
10
8
7
9
SYNC
1.52 (38.61)
MAX.
BOTTOM VIEW
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