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參數資料
| 型號： | AEAS-7500-1GSG0 |
| 廠商： | Avago Technologies Ltd. |
| 英文描述： | Ultra-Precision 16 bit Gray Code Absolute Encoder Module |
| 中文描述： | 超精密16位格雷碼絕對編碼器模塊 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 231K |
| 代理商： | AEAS-7500-1GSG0 |
Description
The encoder IC consists of 13 signal photo diode channels
and 1 monitor photo diode channel and is used for the
optical reading of rotary or linear code carriers (i.e. discs or
scales). The photodiodes are accompanied with precision
amplifiers plus additional circuitry.
The monitor channel is used to drive a constant current
source for the highly collimated IR illumination system.
Functional Description
Background
The 13 signal channels are set up as:
1. Two precision defining signals (A0, A09), which are two
90° electrical shifted sine, cosine signals. These signals
are conditioned to be compensated for offset and gain
errors. After conditioning they are on-chip interpolated
and computed to a combined absolute 16 bit Gray code,
together with signal channels A1-A11.
2. 11 analog (A1-A11) channels, which are directly digitized
by precision comparators with hysteresis tracking. The
digitized signals are called D1-D11.
3. An internal correction and synchronization module
allows the composition of a true 16 bit gray code by
merging the data bits of (1) and (2) by still keeping the
code monotonic.
4. There is a Gray code correction feature for this encoder.
This Gray code correction can be disabled/enabled by
the pin KORR.
5. The gain and offset conditioning value of the sine and
cosine signals are preloaded on-chip by factory. This
will minimize mechanical sensor misalignment error.
Features
Two Sine/Cosine true differential outputs with 1024
periods for unit alignment
Integrated highly collimated illumination system
11 digital tracks plus 2 sin/cos tracks generate precise
16 bit Gray code
Ultra fast, 1μs cycle for serial data output word equals
16MHz
The 12 bits MSB is functionable up to 12000 RPM, 16
bit up to 1000RPM
MSB can be inverted for changing the counting direc-
tion
Monitor track for tracking the light level of the LED
Watch dog with alarm output pin LERR
-25 °C to + 85 °C operating temperature
Benefits
No battery or capacitor required for position detection
during power failure
Immediate position detection on power up
Applications
Rotary application up to 16 bits / 360° absolute
position
Cost effective solution for direct integration into OEM
systems
Linear positioning system
AEAS - 7500
Ultra-Precision 16 bit Gray Code Absolute
Encoder Module
Data Sheet
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