PDF AEAS-7000 Data sheet ( Hoja de datos )

Número de pieza	AEAS-7000
Descripción	Plug and Play Ultra-Precision Absolute Encoder 16-bit Gray Code
Fabricantes	Agilent
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No Preview Available ! Agilent AEAS-7000 Plug and Play Ultra-Precision Absolute Encoder 16-bit Gray Code Data Sheet www.DataSheet4U.com 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 carriers (i.e., discs). 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 (4 bit) and computed to an absolute 6 bit Gray code. Additionally, these Sin/Cos signals can be tapped as two true-differential analog outputs to be used at the system designer’s choice. 2. 11 analog (A1-A11) channels which are directly digitized by precison comparators with hysterisis tracking. The digitized signals are called D1-D11. 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 monotony. There is a Gray code correction feature for this encoder to counter any codewheel imperfection or misalignment. This Gray code correction can be disabled/enabled by the pin KORR. The gain and offset conditioning value of the sine and cosine wave has been on-chip preset by factory. This will compensate for mechanical sensor misalignment error. Features • Minumum mechanical alignment during installation • 2 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, 1 µs cycle for serial data output word equals 16 MHz • On-chip interpolation and code correction to compensate for mounting tolerance • MSB can be inverted for changing the counting direction • Internally built in monitor track for tracking the light level • Watch dog with alarm output • –25°C to +85°C operating temp. Applications • Rotary application up to 16 bit/ 360° absolute position • Rotary application up to 11 bit user defined code patterns • Cost effective solution for direct integration into OEM systems 1 page NSL SCL www.DataSheet4UD.cOoUmT(SERIAL) 1 FRAME = 16 BITS LAPSE TIME BETWEEN WORDS, SET BY NSL 12 D11 D10 14 15 16 D-3 D-4 D11 Figure 2. Timing diagram. Note: VALID DATA IS WHEN NSL IS LOW Absolute Limits No. Parameters 1 SupplyVoltage 2 Voltages at all Input and Output Pins 3 OperatingTemperature 4 StorageTemperature Symbol VD Vin , Vout TA TS Min. –0.3 –0.3 –25 –40 Typ. Max. 6.0 VD + 0.3 +85 +100 Units V V °C °C Operating Conditions No. Parameters 1 SupplyVoltage 2 OperatingTemperature 3 Input-H-Level 4 Input-L-Level Symbol VD TA Vih Vil Min. 4.5 –25 0.7VD 0 Typ. 5 25 Max 5.5 +85 VD 0.3VD Units V °C V V 5 5 Page

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Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
AEAS-7000	Plug and Play Ultra-Precision Absolute Encoder 16-bit Gray Code	Agilent

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