nar y
iC-TW8
16-BIT SIN/COS INTERPOLATOR
limi
pre
WITH AUTO-CALIBRATION
Rev A2, Page 4/12
PACKAGING INFORMATION
PIN CONFIGURATION QFN48-7x7
(topview)
PIN FUNCTIONS
No. Name Function
38 AVDD +3.1 V to 5.5 V Analog Supply Voltage
AVDD and DVDD can be powered either
mutually or separately but must be the
same voltage.
46 AVSS Analog Ground
AVSS must be connected to DVSS ex-
ternally.
21 DVDD +3.1 V to 5.5 V Digital Supply Voltage
15 DVSS Digital Ground
TP
Connect the backside paddle to a
ground plane which must have AVSS
potential.
Refer to the following table for a detailed
description.
... other
PIN FUNCTIONS
No. Name
1
2
nc
xRST
Digital in,
low active,
40 kΩ pull-up
Digital in,
5 kΩ pull-down
Reset Input
I/O
Function
Description
Pin has no connection to die. Connect to DVSS on PCB.
The device is held in reset as long as xRST is low.
For operation at 5 V, connect 68 kΩ to DVSS (changes the power-on-
reset threshold to approx. 4 V). Refer to section Power-on-Reset and
Startup for more information on reset.
Fabrication test is enabled when pin is high during reset. This pin must
be connected to DVSS for normal operation.
Pin must be tied low.
Device enters calibration mode on falling edge of CALIB. Adaptation
parameters are written to the external eeprom on rising edge of CALIB.
This pin should be left floating or connected to DVDD if not used.
The pin is a programmable clock output that can be used for PWM
synchronization.
A connection to DVSS is advisable when not in use.
Pin is bi-directional. Refer to Programmer’s Reference for more details.
This pin outputs the internal ADC sampling clock, which can be used to
synchronize downstream circuits.
A connection to DVSS is advisable when not in use.
Pin directly connects to an SPI master MI pin.
Pin directly connects to SPI master MO pin.
This pin should be tied to DVSS if the SPI is not used.
3
4
5
FAB
EESEL
CALIB
Test Enable Input
Digital in,
Selection Input
150 kΩ pull-down
Digital in,
10 kΩ pull-up,
hysteresis
Calibration Control
6
CLOCK
Digital in/out,
Clock Output
150 kΩ pull-down
Digital in/out,
150 kΩ pull-up
1-Wire Interface I/O
7
8
IR
FRAME
Digital in/out,
Sync Output
150 kΩ pull-down
Digital out
Digital in
SPI Slave Output
SPI Slave Input
9
10
SPI_SO
SPI_SI
ICHAUS [ IC-HAUS GMBH ]
