iC-LNB 18-BIT OPTO ENCODER
WITH SPI AND SER/PAR INTERFACES
Rev A1, Page 10/35
ELECTRICAL CHARACTERISTICS
Operating conditions: VDDA = 4 V to 5.5 V, VDD = 3 V to 5.5 V, GNDA = GND, Tj = -40 °C to 125 °C, unless otherwise specified.
Item Symbol
No.
Parameter
Conditions
Unit
Min.
47
Typ.
Max.
Output Voltage PSIN, NSIN, PCOS, NCOS
401 Vdc()
402 Vpk()
403 I()mx
404 Ri()
DC-Voltage at all Outputs
Permissible Signal Amplitude
Permissible Output Current
Output Resistor
Offset adjusted to VDDAH
DC level = VDDA/2
50
53
0.6
1
%VDDA
0.5
V
mA
Ω
-1
I() = -1 . . . 1 mA
75
200
LED Power Control LED, Error Message ERR
501 Imx()
502 Iop()
503 Vs()
504 tr()
Permissible LED Current at LED
LED Current Control Range
Saturation Voltage at LED
Rise Time LED Current
-100
-50
0
-1
1
mA
mA
V
ERRS (internal) = 0, V(LED) > Vs(LED)
Vs() = VDDA - V(LED); I() = -50 mA
I(LED): 0 % → 90 %
amplitude at PSIN, NSIN, PCOS and NCOS
from 50 % to 100 % of setpoint
0.8
1.5
ms
µs
505 tset()
Settling Time of LED Control
Loop
300
506
Vs()hi
Saturation Voltage hi at ERR
Vs()hi = VDD - V(ERR);
400
mV
VDD = 3 . . . 4 V, I() = 1.5 mA
VDD = 4 . . . 5.5 V, I() = 2.5 mA
507 Isc()hi
508
Short-Circuit Current hi at ERR
Saturation Voltage lo at ERR
-100
1.5
-1.5
400
mA
mV
Vs()lo
VDD = 3 . . . 4 V, l() = 1.5 mA
VDD = 4 . . . 5.5 V, l() = 2.5 mA
509 Isc()lo
Short-Circuit Current lo at ERR
100
mA
Interpolator
701
702
703
AAabs
Absolute Angular Position
Accuracy
referenced to a Sin/Cos signal period
RESIPO = 10 (6 bit interpolation)
RESIPO = 01 (7 bit interpolation)
RESIPO = 00 (8 bit interpolation)
2.8
1.4
0.7
DEG
DEG
DEG
AArel
Relative Angular Error
Angular Hysteresis
referenced to output period T, see Figure 1
RESIPO = 10 (6 bit interpolation)
RESIPO = 01 (7 bit interpolation)
RESIPO = 00 (8 bit interpolation)
1
2
4
%
%
%
AAhys
referenced to output period T, see Figure 1
RESIPO = 10 (6 bit interpolation)
RESIPO = 01 (7 bit interpolation)
RESIPO = 00 (8 bit interpolation)
2.8
1.4
0.7
DEG
DEG
DEG
704
705
706
tw()hi
tAB
Duty Cycle
referenced to output period T, see Figure 1
RESIPO = 11 (interpolation active)
50
%
Phase Shift A versus B
referenced to output period T, see Figure 1
RESIPO = 11 (interpolation active)
25
%
fmax
Maximum Permissible Sin/Cos
Frequency
RESIPO = 10 (6 bit interpolation)
RESIPO = 01 (7 bit interpolation)
RESIPO = 00 (8 bit interpolation)
foipo/64
foipo/128
foipo/256
kHz
kHz
kHz
FlexCount
801
Additional Relative Angular Error
of FlexCount
referenced to output period T, see Figure 1
all resolutions
AArelFlex
0
25
0
25
%
%
%
all binary resolutions
maximum resolution - 4
for RESIPO = 00 (8 bit interpolation):
RESSUB = 0x01387 (resolution 5 000)
RESSUB = 0x04E1F (resolution 20 000)
RESSUB = 0x09C3F (resolution 40 000)
RESSUB = 0x3FFFB (resolution 218 - 4)
0.48
1.92
3.85
25
%
%
%
%
802 tpFlex()
803
Propagation Delay FlexCount
1/foflex
fmax
Maximum Permissible Sin/Cos
Frequency
RESIPO = 10 (6 bit interpolation)
RESIPO = 01 (7 bit interpolation)
RESIPO = 00 (8 bit interpolation)
foflex/64
foflex/128
foflex/256
kHz
kHz
kHz
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