AD102 Datasheet, PDF (1/6 Pages) Analog Devices – General Purpose Input Isolation Amplifier

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FEATURES
Integral Isolated Power Supply
500 V rms CMV Isolation Rating (100% Tested)
High Accuracy: ؎0.05% Max Nonlinearity
Small SIP Style Footprint
Lowest Priced Isolation Amplifiers
APPLICATIONS
Single/Multichannel Data Acquisition Systems
Process Control Input Signal Isolation
Motor Control
Utility Power Monitoring
General Input Protection Circuits
Ground Loop Interruption
FB 3
IN– 6
IN+ 5
ICOM 4
General Purpose
Input Isolation Amplifier
AD102/AD104
FUNCTIONAL BLOCK DIAGRAM
AMPLIFIER
AND
MODULATOR
SIGNAL
AD102
DEMOD
1 OUT H I
±5V
FS
FILTER
9 OUT LO
POWER
RECTIFIER
POWER
25kHz
OSCILLATOR 7 +15V DC
2 ^PWR/CLK
COM
GENERAL DESCRIPTION
The AD102 and AD104 are general purpose, two-port, isolation
amplifiers suitable for use where input signal isolation is desired.
Each offers a functionally complete, compact isolation solution
rated at 500 V rms common mode, based upon the proven and
reliable transformer-coupled, galvanic isolation technique used
in all AD200 series isolation amplifier products.
Each model is offered in a minimum footprint package requiring
no external components to operate. Though similar to the
AD202 and AD204, the AD102 and AD104 models are in-
tended as lower cost solutions where the performance of the
AD202 or AD204 is not demanded.
Both the AD102 and AD104 can be used in applications where
input-to-input and/or input-to-system isolation is desired. The
AD102 is best suited for single input uses as it requires only
+15 V dc power to operate. It may also be appropriate for
multichannel applications when input-to-input isolation is not
required such as where a single input multiplexer selects a spe-
cific channel prior to isolation.
For applications where input to input isolation is required, the
AD104 may be a more desirable choice. It offers the lowest cost
per channel especially when powered from a common clock
source, the cost of which may be amortized over many channels.
The clock necessary for AD104 operation is a 25 kHz, 15 V p-p
square wave applied to the clock input pin. Most standard oscil-
lator components like a CD4047 or TL555 may be used, or a
designer may choose the AD246 clock driver developed for the
AD204 product.
PRODUCT HIGHLIGHTS
Complete, Single Device Solution for Input Isolation
The AD102 offers full isolation without external parts or need
for an external dc/dc power source. The AD104 features the
same functionality at a lower price for multichannel uses when
supplied with a 25 kHz clock signal.
High Accuracy
A maximum nonlinearity of 0.05% is specified for both the
AD102 and AD104 over the rated temperature range.
Wide Bandwidth
Each is specified with a full power (–3 dB) bandwidth. The
AD104 at 4 kHz and the AD102 at 1.5 kHz.
High Performance Common-Mode Rejection
While providing continuous 500 V rms isolation, greater than
100 dB rejection is provided. Each part has only 5.5 pF (typical)
of common-mode input capacitance.
Uncommitted Input Stage
Both models offer an uncommitted op amp input stage for user
flexibility and input gain optimization up to 100 V/V.
Low Power Consumption
The AD104 consumes only 35 mW from the clock source, the
AD102 only 75 mW from the +15 V dc supply.
REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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