IA284 LOW COST, HIGH-LINEARITY ISOLATION AMPLIFIER Fully Compatible with 10-Bit Acquisition Systems FEATURES CHARACTERISTICS • Linearity: 0.025% Peak, Typical • 2500V Input / Output Isolation • 126dB Common-Mode Rejection • 10:1 Programmable Gain (Typical, @ 25°C, Vs = +15 VDC unless otherwise noted.) GAIN (Non-inverting) Range (50kΩ load) Formula Deviation from Formula Vs. Temperature (0 to + 70°C) Nonlinearity, G = 1V/V to 10V/V 1 to 10V/V Gain = ( 1 + 100kΩ 10.7kΩ + Rg) ±3% ±0.015%/°C @±5V, ±0.025% @±10V, ±0.1% @±10V, ±0.2% max. The Model IA284 Isolation Amplifier is an ultracompact module offering high linearity, 2500 volt input / output isolation, 126 dB common-mode rejection, programmable gain, and a floating internal supply for powering an external transducer. Its .1% linearity assures compatibility with 10-bit data acquisition systems, and input voltage noise is held to 1V, 10Hz to 1kHz, with 10pA maximum current noise for the same range. An independent ±15VDC, ±15mA supply in the input section, with the same voltage isolation as the input, can be used to power an external transducer or preamplifier. BLOCK DIAGRAM IA284 OUTER INPUT SHIELD HI IN GAIN ADJ INNER INPUT SHIELD SHIELD GUARD LO IN +VsOUT -VsOUT OUTPUT SHIELD MODULATOR DEMODULATOR MODULATOR DRIVE DEMODULATOR DRIVE DC-DC CONVERTER OSCILLATOR FILTER HI OUT LO OUT +Vs COM 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. 1.52 (38.61) MAX. .63 (16.26) MAX. 1.52 (38.61) MAX. MODEL IA284 .20 (5.08) MIN. .04 (1.02) DIA. 1 LO IN +15 7 12 N.C. 2 +Vs (GAD) COM 8 3 -Vs 5 +IN 9 LO OUT HI OUT SHIELD 10 6 GUARD BOTTOM VIEW INPUT VOLTAGE RATINGS Linear Differential Range, G = 1V/V Max. Safe Differential Input Continuous Pulse, 10ms Duration, 1 Pulse/10 Sec Max. CMV, Inputs to Outputs AC, 60HZ, 1 Minute Duration Pulse, 10mS Duration, 1 Pulse/10 Sec With 510kΩ in Series with Guard Continuous, AC or DC CMR, Inputs to Outputs, 60Hz Balanced Source Impedance 5KΩ Source Imbalance CMR, Inputs to Guard, 60Hz 1KΩ Source Imbalance Max. Leakage Current, Inputs to Power Common @ 115VAC, 60Hz INPUT IMPEDANCE Differential Overload Common Mode INPUT DIFFERENCE CURRENT Initial, @ +25°C Vs. Temperature (0 to + 70°C) INPUT NOISE Voltage 0.05Hz to 10Hz 10Hz to 1kHz Current 0.05Hz to 100Hz 10Hz to 1kHz FREQUENCY RESPONSE Small Signal, -3dB G = 1V/V to 10V/V Full Power, 10V p-p Output Gain = 1V/V Gain = 10V/V Recovery Time to ±100µV after Application of ±600V pk differential Input Pulse OFFSET VOLTAGE, REFERRED TO INPUT Initial, @ +25°C Vs. Temperature (0 to + 70°C) Gain = 1 V/V (µV/°C max.) Gain = 100V/V (µV/°C max.) At other Gains (µV/°C max.) Vs. Supply Voltage RATED OUTPUT Voltage, 50KΩ Load Output Impedance Max. CMV, Output Common to Power Common Peak AC or DC Continuous ISOLATED POWER OUTPUTS Voltage, ±5mA Load Accuracy Current Regulation No Load to Full Load Ripple, 100kHz Bandwidth POWER SUPPLY, SINGLE POLARITY Voltage, for Rated Performance Voltage, Operating Current, Quiescent TEMPERATURE RANGE Rated Performance Storage CASE DIMENSIONS MATING SOCKET NOMINAL WEIGHT ±10V min. 240V rms. 6,500V pk max. 2,500V rms. ±2,500V pk max. ±5,000V pk max. ±2,500V pk max. 126dB 120dB 80dB 1.2µA max. 108Ω || 3pF 390KΩ 5 X 1010Ω || 20pF ±2nA ±0.01nA/°C 8µV 10µV rms. 5pA p-p 10pA rms. 1kHz 500Hz 500Hz 500mS ±(1 + 5/G) mV ±65 ±15 ±(15 + 50/G) ±(1 + 50/G), µV/V ±10V min. 1kΩ ±50V pk. ±15VDC ±5% ±15mA min. +0, -15% 100mV p-p +15VDC, ±0.5V +(8 to 15.5) VDC +20mA 0°C to +70°C -55°C to +85°C 1.5” x 1.5” x .62” S134 1.3 ounces