IC-TW28 Datasheet, PDF (7/80 Pages) IC-Haus GmbH – 10-BIT SIN/COS INTERPOLATOR

W^iCIT^-H^TA^WU²TO⁸-C1A0L-BIBITRSATINIO/CNOASNINDTLEINREPODLRAIVTp^{OERrReliminary}
Rev D2, Page 7/80
PIN FUNCTIONS
No. Name
1 SIN+
2 SIN–
3 AVDD
I/O
Analog in
Analog in
Supply
Function
Sine Input +
Sine Input –
Analog Power Supply
4 COS+
5 COS–
6 AVSS
7 ZERO+
8 ZERO–
9 VREF
Analog in
Analog in
Ground
Analog in
Analog in
Analog out
Cosine Input +
Cosine Input –
Analog Ground
Zero Input +
Zero Input –
Bias Output
10 VC
Analog out
Bias Output
11– Reserved
13
14 xRST
15 xCALIB
16 xIRQ
Digital inputs
Digital in,
active low
Digital in,
active low
Digital out,
active low
Test Inputs
Reset Input
Calibration Control
IRQ or Fault Output
17 Z–
18 Z+
19 IOVSS
Digital/RS422 out Z– or W– Output
Digital/RS422 out Z+ or W+ Output
Ground
I/O Ground
20 B–
21 B+
22 IOVDD
Digital/RS422 out B– or V– Output
Digital/RS422 out B+ or V+ Output
Supply
Output Drivers
Power Supply
23 A–
24 A+
25 DVDD
26 LED
Digital/RS422 out A– or U– Output
Digital/RS422 out A+or U+ Output
Supply
Digital Power Supply
Digital output
LED PWM Output
27 DVSS
28 SO/C3
Ground
Digital out,
Analog in
29 SI/C2
Digital in,
Analog in
30 SCLK/C1
Digital in,
Analog in
31 xSS/C0
Digital in,
Analog in
32 PINCFG Digital in
Digital Ground
SPI Slave Output,
Pin Configuration Input 3
SPI Slave Input,
Pin Configuration Input 2
SPI Slave Clock Input,
Pin Configuration Input 1
SPI Slave Select Input,
Pin Configuration Input 0
Configuration Mode
Selection
Description
Differential sine signal input. For single ended sensors, SIN– must be
biased to an appropriate DC level. Do not allow to float.
+3.1 V to +3.6 V supply input for analog circuitry. AVDD should be tied
together with DVDD and IOVDD and supplied from a clean source.
Differential cosine signal input. For single ended sensors, COS– must
be biased to an appropriate DC level. Do not allow to float.
AVSS must be tied to high quality ground, usually a solid PCB plane.
Differential Zero Gating Input. For single ended sensors, the unused
input (either ZERO+ or ZERO–) must be biased to an appropriate DC
level. Do not allow to float.
Decouple with 100 nF capacitor to AVSS. Do not inject noise into this
pin as it directly impacts ADC conversion quality.
Decouple with 100 nF capacitor to AVSS. Do not inject noise into this
pin as it directly impacts ADC conversion quality.
Reserved pins; must be connected to ground for normal operation.
The device is reset as long as xRST is low. An external RC network
with at least R populated is recommended. Do not allow to float.
Device enters calibration mode on falling edge of CALIB. This pin must
be tied high if not used. Do not allow to float.
Interrupt request output to external micro controller. Output can also be
used to directly drive a fault LED in stand-alone applications. Can be
configured as push-pull or open-drain. Do not allow to float.
In ABZ output mode these are the differential Z outputs. In UVW output
mode these are the W outputs.
All ground pins must be connected to a high quality ground, usually a
solid PCB plane.
In ABZ output mode these are the differential B outputs. In UVW
output mode these are the V outputs. In Z calibration mode these show
the Z window used to gate the Z output.
+3.1 V to +3.6 V voltage terminal supplying all pin output drivers includ-
ing the RS422 drivers and LED current.
IOVDD and DVDD must be the same voltage level. IOVDD can require
up to 100mA depending on loads. It is usually sufficient to tie IOVDD to
the same supply as AVDD and DVDD.
In ABZ output mode these are the differential A outputs. In UVW
output mode this these are the U outputs. In Z calibration mode these
show the un-gated Z signal once per input period. With Encoder Link
active, A+ is ELCLK input and A– is ELIN input or ELOUT output.
+3.1 V to +3.6 V supply voltage terminal for digital circuits. DVDD
should be tied together with AVDD and IOVDD to a high quality supply.
Used to supply the illumination LED of optical sensors to maintain
constant intensity and constant Sin/Cos sensor amplitude. Can be
configured as push-pull or open-drain. Do not allow to float.
Pin must tied to high quality ground, usually a solid PCB plane.
In serial configuration mode, this is the slave output and connects to an
SPI master MI pin. In pin configuration mode, this is input C3. Do not
allow to float.
In serial configuration mode, this is the slave input and connects to an
SPI master MO pin. In pin configuration mode, this is input C2. Do not
allow to float.
In serial configuration mode, this is the slave clock input and connects
to an SPI master clock output pin. In pin configuration mode, this is
input C1. Do not allow to float.
In serial configuration mode, this is the slave select input and connects
to an SPI master slave select output pin. In pin configuration mode,
this is input C0. Do not allow to float.
For serial configuration mode, connect PINCFG to DVSS.
For pin configuration mode, connect PINCFG to DVDD.