IC-TW28 Datasheet, PDF (10/80 Pages) IC-Haus GmbH – 10-BIT SIN/COS INTERPOLATOR

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Rev D2, Page 10/80
ELECTRICAL CHARACTERISTICS
Operating conditions: AVDD = DVDD = IOVDD = 3.1...3.6 V, Tj = –40...+125 °C, reference point AVSS unless otherwise stated
Item Symbol Parameter
No.
Conditions
Min. Typ. Max.
Internal Oscillator
401 fosc
Oscillator Frequency
Tj = 27 °C; AVDD, DVDD = 3.1 V
AVDD, DVDD = 3.6 V
48
51
49
52
402 TCf
Temperature Coefficient
225
Internal EEPROM
501 Nwrite
Permissible Number of Write
Cycles
Tj = –40...+85 °C; chip release W, W1 ⁷
chip release V1
50
1000
502 Tjw
Write Temperature Range
-40
85
503 Tjr
Read Temperature Range
-40
125
504 DRTraw Raw Data Retension Time
10
Reset and Start-Up: xRST
601 DVDDon DVDD Power-On Threshold
Increasing voltage at DVDD; xRST tied to
DVDD
2.5 2.7 3.0
602 DVDDoff DVDD Undervoltage Reset
Decreasing voltage at DVDD; xRST tied to
2.2
2.4
Threshold
DVDD
603 tstart
Startup Time
Valid EEPROM configuration, START.wait = 0
2
START.wait = 3 (factory default)
10
Digital Input Pins: xRST, xCALIB, A+/– (Encoder Link active), SI, SCLK, xSS, PINCFG
701 Vt()hi
Input Logic Threshold High
DVDD = 3.3 V
1.9
702 Vt()lo
Input Logic Threshold Low
DVDD = 3.3 V
0.8
703 Ilk()
Input Leakage Current at
±50
SI, SCLK, xSS
704 f(SCLK) Permissible Clock Frequency at PINCFG connected to DVSS
20
SCLK
Digital Output Pins: xIRQ, SO, A+/A–, B+/B–, Z+/Z– (CMOS drivers enabled: MAIN_CFG.rs422 = 0)
801 I()max
Permissible Output Current
Per pin, indefinite
±10
803 Vs()hi
Saturation Voltage High
Vs()hi = IOVDD - V(); I() = –4 mA,
0.7
MAIN_CFG.irqpp = 1 (for xIRQ push-pull)
804 Vs()lo
Saturation Voltage Low
I() = 4 mA
0.7
805 Isc()hi
Short-Circuit Current High
Any pin shorted to DVSS
–30 –16
806 Isc()lo
Short-Circuit Current Low
Any pin shorted to DVDD
16
30
807 tr()
Rise Time
DVDD = 3.3 V, CL = 50 pF, 10% → 90% VDD
20
808 tf()
Fall Time
DVDD = 3.3 V, CL = 50 pF, 90% → 10% VDD
20
RS422 Drivers: A+/A–, B+/B–, Z+/Z– (RS422 drivers enabled: MAIN_CFG.rs422 = 1)
901 Idrv()
Nominal RS422 Driver Current RL() = 120 Ω between + and – terminals
20
27
902 Isc()hi
Short-Circuit Current High ⁸
+ or – pin shorted to IOVSS
–55
903 Isc()lo
Short-Circuit Current Low ⁸
+ or – pin shorted to IOVDD
35
904 t_AB
905 t_whi
906 AArel
Output Phase A vs. B
Duty Cycle at Output A, B
Relative Angle Accuracy
Refer to Figure 3
Refer to Figure 3
f_in = 1 kHz, ideal waveform, FILT_K.kp = 6,
referenced to output period T (see Figure 3);
INTER < x50
INTER = x50...x100
INTER > x100
25
50
±5
±10
±15
907 t_MTD
Time Between AB Edges
Refer to Figure 3; ABLIMIT = 0x00
(Minimum Transition Distance)
1/fosc
LED Output (enabled: LED_CFG = 1)
A01 I()max
Permissible Output Current
for continuous operation
±15
A02 Vout()hi Output Voltage High
VDD = 3.3 V, Tj = 27 °C, I() = –10 mA
2.7
A03 Vs()hi
Saturation Voltage High
Vs()hi = DVDD – V(LED); I() = –10 mA
1
A04 Vs()lo
Saturation Voltage Low
I() = 10 mA
1
Unit
MHz
MHz
ppm/K
°C
°C
years
V
V
ms
ms
V
V
nA
MHz
mA
V
V
mA
mA
ns
ns
mA
mA
mA
%
%
%
%
%
mA
V
V
V
7 _{Regarding chip release W1, please refer to the design review on page 77.}
8 _{Regarding chip release W, please refer to the design review on page 77.}