IC-TW4 Datasheet, PDF (9/14 Pages) IC-Haus GmbH – PROGRAMMABLE INTERPOLATOR WITH AUTOMATIC OFFSET CORRECTION

iC-TW4 PROGRAMMABLE INTERPOLATOR
WITH AUTOMATIC OFFSET CORRECTION
PINB-NINB
PINA-NINA
Rev D1, Page 9/14
A
B
PINZ-NINZ
Z
Interpolation of x5 shown
Index pulse is disabled
through pin PINZ low
Figure 4: Interpolation function
Performance
The device performance depends primarily on the se-
lected interpolation rate. However, parametric manu-
facturing tolerances as well as power supply voltage
and temperature has a defining impact on corner per-
formance. Typical performance refers to nominal wafer
parameters. Due to manufacturing variations the ac-
tual performance can be ±20 % of stated typical per-
formance.
IPF Typ. maximum input frequency
x2 300 kHz
x4 300 kHz
x5 300 kHz
x8 300 kHz
x10 150 kHz
x16 150 kHz
x20 75 kHz
x25 75 kHz
x32 75 kHz
x50 75 kHz
x64 75 kHz
Table 7: Frequency range
Typical performance at 25 °C, maximum input fre-
quency at 125 °C is up to 10 % lower
Amplification
The input amplifier gain is configured through pin
CFG2. The recommended resistor values are shown
in Table 8. 1 % tolerance resistors must be used.
Input Amplitude,
differential
0.8 V - 1.5 V
400 mV - 800 mV
200 mV - 400 mV
100 mV - 200 mV
50 mV - 100 mV
25 mV - 50 mV
10 mV - 25 mV
test only
reserved
reserved
reserved
peak-peak
[V] at CFG2
0.13 * VDD
0.20 * VDD
0.27 * VDD
0.33 * VDD
0.40 * VDD
0.46 * VDD
0.54 * VDD
0.60 * VDD
0.67 * VDD
0.73 * VDD
0.80 * VDD
R3 [kΩ ]
22.6
15.0
11.3
8.87
7.50
6.49
5.62
4.99
4.53
4.12
3.74
R4 [kΩ ]
3.48
3.74
4.12
4.53
4.99
5.62
6.49
7.50
8.87
11.3
15.0
Table 8: Gain configuration
Test Modes
The iC-TW4 supports a variety of test modes. With the
exception of index calibration all test modes are used
for device verification and production test only. Please
refer to section "Index Gating" on page 10 for details
on how to use the index calibration mode.