|
|
PDF AS5140H Data sheet ( Hoja de datos )
| Número de pieza | AS5140H | |
| Descripción | 10-Bit 360-o Programmable Magnetic Rotary Encoder | |
| Fabricantes | ams | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AS5140H (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
AS5140H
10-Bit 360º Programmable Magnetic
Rotary Encoder For High Ambient
Temperatures
General Description
The AS5140H is a contactless magnetic rotary encoder for
accurate angular measurement over a full turn of 360º and over
an extended ambient temperature range of -40ºC to 150ºC.
It is a system-on-chip, combining integrated Hall elements,
analog front end and digital signal processing in a single device.
To measure the angle, only a simple two-pole magnet, rotating
over the center of the chip, is required. The magnet may be
placed above or below the IC.
The absolute angle measurement provides instant indication of
the magnet’s angular position with a resolution of 0.35º = 1024
positions per revolution. This digital data is available as a serial
bit stream and as a PWM signal. Furthermore, a
user-programmable incremental output is available.
An internal voltage regulator allows the AS5140H to operate at
either 3.3V or 5V supplies.
The AS5140H is pin-compatible to the AS5040; however it uses
low-voltage OTP programming cells with additional
programming options.
Ordering Information and Content Guide appear at end of
datasheet.
Figure 1:
Added Value of Using AS5140H
Key Benefits & Features
The benefits and features of AS5140H, 10-Bit 360º
Programmable Magnetic Rotary Encoder For High Ambient
Temperatures are listed below:
Benefits
No mechanical wear
High resolution absolute position sensing
Easy to use for motor control
Adjustable zero position
Features
Contactless high resolution rotational position encoding over a
full turn of 360º
Two digital 10-bit absolute outputs: Serial interface and Pulse
width modulated (PWM) output
Three incremental output modes: Quadrature A/B and Index
output signal, Step / Direction and Index output signal, 3-phase
commutation for brushless DC motors
User programmable zero / index position
ams Datasheet
[v1-08] 2015-Jan-16
Page 1
Document Feedback
1 page  
AS5140H − Pin Assignment
Note(s): Both modes (mode 1.x and mode 2.x) provide an index
signal (1 pulse/revolution) with an adjustable width of one LSB
or three LSB’s.
Mode 3.x: Brushless DC Motor Commutation Mode
In addition to the absolute encoder output over the SSI
interface, this mode provides commutation signals for
brushless DC motors with either one pole pair or two pole pair
rotors. The commutation signals are usually provided by 3
discrete Hall switches, which are no longer required, as the
AS5140H can fulfill two tasks in parallel:
absolute encoder + BLDC motor commutation.
In this mode,
• Pin 12 provides the LSB output instead of the PWM
(Pulse-Width-Modulation) signal.
• Pin 8 (Prog) is also used to program the different
incremental interface modes, the incremental resolution
and the zero position into the OTP (see Incremental Mode
Programming). This pin is also used as digital input to shift
serial data through the device in Daisy Chain
configuration, (see Figure 24).
• Pin 11 Chip Select (CSn; active low) selects a device within
a network of AS5140H encoders and initiates serial data
transfer. A logic high at CSn puts the data output pin (DO)
to tri-state and terminates serial data transfer. This pin is
also used for alignment mode (see Alignment Mode) and
programming mode (see Programming the AS5140H).
• Pin 12 allows a single wire output of the 10-bit absolute
position value. The value is encoded into a pulse width
modulated signal with 1μs pulse width per step (1μs to
1024μs over a full turn). By using an external low pass filter,
the digital PWM signal is converted into an analog voltage,
allowing a direct replacement of potentiometers.
ams Datasheet
[v1-08] 2015-Jan-16
Page 5
Document Feedback
5 Page 
AS5140H − Electrical Characteristics
Symbol
Parameter
Condition
Min Typ
Power-on reset
VON
thresholds
On voltage; 300mV typ.
hysteresis
DC supply voltage 3.3V
Power-on reset
(VDD3V3)
VOFF
thresholds
OFF voltage; 300mV
typ. hysteresis
1.37 2.2
1.08 1.9
tPwrUp Power-up time
Until offset compensation
finished
tdelay
System propagation
delay absolute output
Includes delay of ADC and DSP
System propagation
delay incremental
output
Calculation over two samples
fS
Sampling rate for
absolute output
Internal sampling rate,
TAMB = 25ºC
Internal sampling rate,
TAMB = -40 to 150ºC
9.90 10.42
9.38 10.42
CLK
Read-out frequency
Max. clock frequency to read
out serial data
Max
2.9
2.6
50
48
192
10.94
11.46
1
Unit
V
ms
μs
μs
kHz
MHz
Note(s) and/or Footnote(s):
1. Digital Interface.
2. Integral Non-Linearity (INL) is the maximum deviation between actual position and indicated position.
3. Differential Non-Linearity (DNL) is the maximum deviation of the step length from one position to the next.
4. Transition Noise (TN) is the repeatability of an indicated position.
ams Datasheet
[v1-08] 2015-Jan-16
Page 11
Document Feedback
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AS5140H.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AS5140H | 10-Bit 360 Programmable Magnetic Rotary Encoder |  austriamicrosystems AG |
| AS5140H | 10-Bit 360-o Programmable Magnetic Rotary Encoder | ams |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |