IPA1751_15 Datasheet, PDF (1/4 Pages) Analog Devices – INDUCTOSYN PREAMPLIFIER AND POWER OSSCILLATOR

.~ - .
-.. ANALOG
W DEVICES
InductosynTPMreamplifier
andPowerOscillator
FEATURES
IPA1751
Encapsulated for Protection
Phase Shift <5°
Phase Match >1°
Load Capacity 10,OOOpF
OSC1754
Isolated Output
Multi-Tapped
OBSOLETE Quadrature Reference Output
APPLICATIONS
The IPA1751 and OSC1754 when used with one of the
IRDC1730 series Inductosyn/resolver-to-digital conver-
ters offers the user all the electronic modules neces-
sary for the Inductosyn to controller interface.
GENERAL DESCRIPTION
IPA1751
The output signals from an Inductosyn slider are at a low level
of the order millivolts and requires amplification and buffering
before transmission to an Inductosyn to digital converter. The
IPA1751 provides the necessary gain and output impedance for
this purpose.
Any gain mismatch in the two channels amplifying the sine and
cosine outputs of the Inductosyn slider contributes to the system
error. The IPA1751 with a 0.15% gain match over the temperature
OSC1754
The OSC1754 provides the drive for energization of the Inductosyn
track. Transformer isolated outputs are available at four voltages
that allows a wide range of track resistance to be accommodated.
In addition to the power output, a two low power outputs are
provided one in phase and one 90° in advance of the power
output. The necessity for a quadrature output is for the reference
input of the IRDC, since Inductosyn track impedance is predo-
minantly resistive, the slider sine and cosine output voltages are
in phase quadrature with the voltage.
range only contributes an error of 0.23 micron using a 2mm
The demands on the absolute accuracy of the phase, frequency
pitch Inductosyn. By carefully controlling phase mismatch to
and amplitude are not exacting owing to the method of conversion
less than 1° the error contribution is only 0.2 micron in a 2mm
used in the IRDC that is tolerant to all these parameters (see
pitch Inductosyn.
IRDCI730/31/33 Data Sheets).
The IPA1751 with an output resistance of less than 3 ohms and
a capability of driving a cable capacity of 1O,OOOpFis totally
suited to machine tool application where the Inductosyn to
digital converter is remote from the measuring Inductosyn.
MODELS AVAILABLE
Model IPA1751/560 is a two channel preamplifier 1kHz to 10kHz
operating 0 to + 70°c.
Model OSC1754/S00 is a power oscillator at 10kHz operating 0
to + 70°c.
Inductosyn is a registered trademark of Farrand Industries, Inc.
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 implica-
tion or otherwise under any patent or patent rights of Analog Devices.
P.O. Box 280; Norwood, Massachusetts 02062 U.S.A.
Tel: [phone]
Twx: 710/394-6577
Telex: 924491
Cables: ANALOG NORWOODMASS
----
-~