IC-NVH Datasheet, PDF (2/13 Pages) IC-Haus GmbH – 6-BIT Sin/D FLASH CONVERTER

iC-NVH
6-BIT Sin/D FLASH CONVERTER
Rev D1, Page 2/13
DESCRIPTION
iC-NV is a monolithic A/D converter which produces two digital A/B incremental signals phase-shifted at 90°
from two sinusoidal input signals, also phase-shifted at 90°.
The converter operates on the flash principle with fast single comparators. The back-end signal processing
circuit includes a no-delay glitch filter which can be set so that only clearly countable incremental signals are
generated. The minimum transition distance for outputs A and B can be set via an external resistor and
adapted to suit the application on hand. For static input signals hysteresis prevents the switching of the
outputs.
By programming the pins the interpolator can be set to nine different resolutions between 4 and 64 angle steps
per cycle; multiplication values of between 1 and 16 are possible for the frequency. The phase relation between
the sine/cosine input signals and the A/B incremental signals generated can be selected here.
The device also incorporates an index signal processing circuit which generates a digital zero pulse at Z (gated
with A only, respectively B) dependent on the analog sine/cosine input signals and the enable input ZERO.
Alternatively, the converter MSB can also be output at Z for synchronization purposes in an absolute
measuring system.
The input amplifiers are configured as instrumentation amplifiers and permit sensor bridges to be directly
connected without the need for external resistors. The input amplification has nine selectable settings which
have been graded to suit standard sensor signals of between ca. 10mVpk and 1Vpk. If external calibration of
the sensor bridge is required, eg. with regard to offset, various test functions can be activated. By this the
amplified analog input signals come available at the outputs, for instance.
PACKAGES TSSOP20 to JEDEC Standard
PIN CONFIGURATION TSSOP20 4.4mm
(top view)
PIN FUNCTIONS
No. Name
Function
1 PCOS
2 NCOS
3 SG1
4 SG0
5 VREF
6 ROT S6
7 SF1 S5
8 SF0 S4
9 GND
10 Z (MSB) S3
11 B
S2
12 A
S1
13 VDD
14 RCLK
15 VCC
16 GNDA
17 PZERO
18 NZERO
19 PSIN
20 NSIN
Input Cosine %
Input Cosine &
Gain Select Input
Gain Select Input
Reference Voltage Output
A/B Phase Selection Input / Test Signal Output
Resolution Selection Input / Test Signal Output
Resolution Selection Input / Test Signal Output
Ground (digital)
Index Signal Output Z (MSB Output when
ROT= open) / Test Signal Output
Incremental Output B / Test Signal Output
Incremental Output A / Test Signal Output
+5 V Supply Voltage (digital)
Min. Transition Distance Preset Input
(use is optional; can be wired to VCC)
+5 V Supply Voltage (analog)
Ground (analog)
Index Signal Enable Input %
Index Signal Enable Input &
Input Sine %
Input Sine &
External connections linking VCC to VDD and GND to GNDA are
required.