IC-PI datasheet(9/49 Pages) ICHAUS

9 / 49 page

preliminary

iC-PI PROGRAMMABLE 12-BIT

Sin/Cos INTERPOLATION IC WITH RS422 DRIVER

Rev B1, Page 9/48

ELECTRICAL CHARACTERISTICS

Operating Conditions: VDD = 4.3 ... 5.5 V, Tj = -40 °C ... 125 °C, IBN calibrated to 200 µA, unless otherwise stated.

Item

Symbol

Parameter

Conditions

Unit

No.

Min.

Typ.

Max.

Signal Conditioning CH0, CH1, CH2 (i = 0 for CH0, i = 12 for CH1 and CH2)

201 G0, G12

Selectable Gain Factors

MODE = 0x05, Ri(3) = 0, GRi and GFi = 0x0

MODE = 0x05, Ri(3) = 0, GRi and GFi = max.

300

MODE = 0x05, Ri(3) = 1, GRi and GFi = 0x0

1.5

MODE = 0x05, Ri(3) = 1, GRi and GFi = max.

202 Gdiff

Relative Gain Ratio CH1 vs. CH2 GF2 = 0x10, GF1 = 0x0

GF2 = 0x10, GF1 = 0x7FF

255

203 ∆G

Step Width Of Fine Gain

Adjustment

for CH0

1.06

for CH1

1.0009

for CH2

1.06

204 INL(Gi)

Integral Linearity Error of Gain

Adjustment

-1.06

1.06

205 VOScal

Offset Calibration Range

referenced to the selected source (VOS0 or

VOS12), mode Calibration 2;

ORi = 00

±100

%V()

ORi = 01

±200

%V()

ORi = 10

±600

%V()

ORi = 11

±1200

%V()

206 ∆OF0

CH0 Offset Calibration Step

Width

referenced to the selected source VOS0;

OR0 = 0x0

3.2

207 ∆OF12

CH1/2 Offset Calibration Step

Width

referenced to the selected source VOS12;

OR12 = 0x0

0.79

208 INL(OFi)

Integral Linearity Error of Offset

Calibration

limited test coverage (guaranteed by design)

-5

LSB

209 PHI12

Phase Error Calibration Range

CH1 vs. CH2

±10.4

210 ∆PHI12

Phase Error Calibration Step

Width

0.02

211 INL(PHI12) Integral Linearity Error of Phase

Calibration

limited test coverage (guaranteed by design)

-0.8

0.8

Sine-To-Digital Conversion

301 fin()max

Maximum Permissible Input

Frequency

refer to Figure 4 for dependencies;

500

kHz

ABZ output at IPF x20, MTD = 0x00

450

kHz

302 AAabs

(INL)

Absolute Angle Accuracy

(Integral Nonlinearity)

relative to input period (360 °), see Fig. 1,

-0.2

+0.2

quasi-static input signal, ideal waveform, ad-

justed signal conditioning, w/o hysteresis error;

0.13

any resolution (IPF x1 to x1024)

303 AEhys

Systemic Absolute Angle Error

With Hysteresis

see 202, refer to Fig. 2;

SELHYS = 0x6 (1.0 °)

0.5

SELHYS = 0x8 (2.0 °)

1.0

304 AArel

(DNL)

Relative Angle Accuracy

(Differential Nonlinearity)

relative to output period (T 100 %), see Fig. 3,

quasi-static input signal, ideal waveform;

IPF x1

IPF x50

1.7

IPF x125

3.5

IPF x250

IPF x500

IPF x1000 (4000 edges per period)

IPF x1024 (4096 edges per period)

305 ABrel

Relative Angle Accuracy A to B

see 202

1/2

AArel

306 AR

Repeatability

see 202 (w/o hysteresis error), VDD = const.,

Tj = const.

0.1

307 N

Output Angle Noise

see 202, 1 Vpp-diff sin/cos input, fin = 0 Hz

0.1

308 AEdiv

Systemic Relative Angle Error

Using Subdivisions

relative to output period (T 100 %), see Fig. 3;

any binary resolution

any decimal resolution

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