IC-TW2_13 Datasheet, PDF(18/28 Page) IC-Haus GmbH – 8-BIT SIN/COS INTERPOLATION IC

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IC-TW2_13 Datasheet, PDF (18/28 Pages) IC-Haus GmbH – 8-BIT SIN/COS INTERPOLATION IC

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iC-TW2 8-BIT SIN/COS INTERPOLATION IC

WITH INTEGRATED EEPROM

Rev E2, Page 18/28

Description

Parameter

Requirement or relationship

Control bit

Oscillator Frequency

Calibrated Osc. Frequ.

fosc [Hz]

fcal [Hz]

< 30 MHz at VDD = 5.5 V, < 25 MHz at VDD = 3.6 V;

see Elec. Char. item 201

CLOCK(4:0)

System Clock

fsystem [Hz]

fsystem = fosc, if CLKDIV = 0

fsystem = fosc/2, if CLKDIV = 1

CLKDIV

Core Clock

fcore [Hz]

fcore = fsystem / (1 + FREQ(6:0))

FREQ(6:0)

Front-end Frequency

Limit*

Back-end Frequency

Limit*

ffront [Hz]

ffront = fsystem / 256, if High Accuracy

ffront = fsystem / 128, if Medium Accuracy

ffront = fsystem / 64, if Low Accuracy

FREQ(6:0)

INTER(7:0)

ffront is the maximum sin/cos input frequency which can be processed by the front-end.

fback [Hz]

fback = fcore / INTER(7:0)

INTER(7:0)

Max. Input Frequency

Max. A/B Output

Frequency

A/B Edge Separation,

Min. Transition Distance

fback is the maximum sin/cos input frequency which can be processed by the A/B generator back-end.

fin()max [Hz]

fin()max = min(ffront, fback)

The permissible max. sin/cos input frequency is determined by fback or ffront, whatever means the lower limit.

fout(AB)max [Hz]

fout(AB)max = 1 / fcore

fout(AB)max = 0.25 / tedge

tedge ,

tMTD

tedge = tMTD = 1 / fcore

A/B Edge Granularity

tgran

tgran = 1 / fsystem

Sin/Cos to A/B Output

Latency

tlatency [Âµs]

10 / fsystem [MHz] + 0.2, if no ï¬lter

18 / fsystem [MHz] + 0.2, if 8 sample average

26 / fsystem [MHz] + 0.2, if 16 sample average

FILTER(1:0)

*) Parameter does not represent a functional IC parameter, paramter introduced for calculation purposes only.

Table 26: Conï¬guration dependencies

DEVICE IDENTIFICATION

IDA(3:0)

Code

Addr. 0x00; bit 7:4

R/W

Function, Major device identiï¬cation

Mask Programmed Value Identiï¬es Major Revision

Table 27: Major device revision

IDB(3:0)

Code

Addr. 0x00; bit 3:0

R/W

Function, Minor device identiï¬cation

Mask Programmed Value Identiï¬es Minor Revision

Table 28: Minor device revision

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