IC-TW8_13 Datasheet, PDF (5/63 Pages) IC-Haus GmbH – 16-BIT SIN/COS INTERPOLATOR WITH AUTO-CALIBRATION

iC-TW8 16-BIT SIN/COS
WITH AUTO-CALIBRATION
INTERPOLATO_pR_reliminary
Rev A2, Page 5/12
PIN FUNCTIONS
No. Name
11 SPI_SCLK
12 nc
13 nc
14 SPI_xSS
15 DVSS
16 OUTZ
17 OUTB
18 OUTA
19 STATUS
20 FAULT
21 DVDD
22 PINSEL
23 nc
24 nc
25 nc
26 reserved
27 SCL
28 SDA
29 WP
30 C0
31 C1
32 C2
33 C3
34 XOUT
35 XIN
36 nc
37 nc
38 AVDD
39 SIN+
40 SIN-
41 COS+
42 COS-
43 nc
44 VC
I/O
Digital in,
with hysteresis
Function
SPI Slave Clock Input
Digital in,
low active
Ground
Digital out
Digital out
Digital out
Digital out
SPI Slave Select Input
Digital Ground
Z Output
B Output
PWM- Output
Z Window
A Output
PWM+ Output
Z Window
PWM Status Output
Digital out
Error Status Output
Supply
Digital Power Supply
Digital in,
Configuration Mode
150 kΩ pull-down Selection
Description
Pin connects to SPI master clock output. The input implements hys-
teresis to avoid double triggering.
This pin must be tied to DVSS if the SPI is not used.
These pins have no connection to die. Connect to DVSS on PCB.
In 4-pin SPI mode this pin directly connects to the SPI master slave
select output. In case the SPI is operated in 3-pin mode, SPI_xSS
must be tied low to DVSS.
Pin must tie to high quality ground, usually a solid PCB plane.
Quadrature interface reference output.
In quadrature mode this is output B.
In PWM mode this is PWM-, the inverted output of OUTA.
In Z calibration mode (bit RB_TEST1.z_test = 1) this is the Z window
seen just after the input comparator.
In quadrature mode this is output A.
In PWM mode this is PWM+.
In Z calibration mode (bit RB_TEST1.z_test = 1) this is the Z window
used to gate the Z output.
This pin provides proportional status information. Pin can drive a
10 mA LED and is widely configurable. Refer to section Monitoring
Interpolation Quality for details.
Pin is low on error and is capable of driving a 10 mA LED. The error
response can be configured as detailed in section Fault Handling for
details.
+3.1 V to +5.5 V supply voltage terminal.
DVDD and AVDD must be the same voltage level (5 V or 3.3 V).
Tie pin to DVSS to enable serial configuration mode.
Tie pin to DVDD to select pin configuration mode.
These pins have no connection to die. Connect to DVSS on PCB.
Digital in/out,
10 kΩ pull-up
Digital in/out,
10 kΩ pull-up
Digital out
Analog in
Analog in/out
Analog in
Supply
Analog in
Analog in
Analog in
Analog in
Analog out
EEPROM Clock Line
EEPROM Data Line
EEPROM Write Protection
Connect this pin to DVSS on PCB.
This pin connects to the EEPROM SCL pin. No external I2C pull-up
resistor is required as 10 kΩ is integrated.
This pin connects to the EEPROM SDA pin. No external I2C pull-up
resistor is required as 10 kΩ is integrated.
This pin acts as the write protect signal and connects to the EEPROM
WP pin. No external pull-up is required as this pin is a push-pull output
actively driving low and high.
Configuration
Inputs
If the pin configuration mode is used (pin PINSEL tied high), each pin
functions as 12-level configuration input.
If serial configuration mode is used (pin PINSEL tied low), connect
these pins to DVSS on PCB.
Crystal Terminal
Crystal Terminal
Pin can be left floating if no crystal is used.
An external oscillator or other square wave clock source can be used
to drive this pin. Refer to Providing a Clock.
Pin must be tied to AVSS if no crystal is used.
These pins have no connection to die. Connect to DVSS on PCB.
Analog Power Supply
Sine Input +
Sine Input -
Cosine Input +
Cosine Input -
Bias Output
+3.1 V to +5.5 V supply voltage terminal. Keep it clean!
DVDD and AVDD must be the same voltage level (5 V or 3.3 V).
Differential sine signal input. For single ended sensors SIN- must be
biased to an appropriate DC level.
Differential cosine signal input. For single ended sensors COS- must
be biased to an appropriate DC level.
Pin has no connection to die. Connect to DVSS on PCB.
Decouple with 1 µF capacitor to AVSS. Do not inject noise into this pins
as it directly impacts ADC conversion noise.