TMC2225 DATASHEET (Rev. 1.15 / 2023-FEB-16)
69
Digital pins
Parameter
Input voltage low level
Input voltage high level
Input Schmitt trigger hysteresis
DC-Characteristics
Symbol Conditions
VINLO
VINHI
VINHYST
Output voltage low level
Output voltage high level
Input leakage current
Pullup / pull-down resistors
Digital pin capacitance
VOUTLO
VOUTHI
IILEAK
RPU/RPD
C
IOUTLO = 2mA
IOUTHI = -2mA
Min Typ Max Unit
-0.3
0.3 VVIO V
0.7 VVIO
VVIO+0.3 V
0.12
V
VVIO
0.2
V
VVIO-0.2
-10
V
10
µA
132 166 200 kΩ
3.5
pF
VREF input
DC-Characteristics
Parameter
Symbol Conditions
VREF input resistance to 2.5V
RAIN
(=5VOUT/2)
Measured to GND
(internalRsense=0)
VREF input voltage range for
VAIN
linear current scaling
Measured to GND
(IscaleAnalog=1)
VREF open input voltage level VAINO
Open circuit voltage
(internalRsense=0)
VREF input resistance to GND for RIREF
reference current input
Measured to GND
(internalRsense=1)
VREF current amplification for
reference current to coil current
at maximum setting
IREFAMPL
IIREF = 0.25mA
VREF input reference offset
current
Motor current full scale tolerance ICOIL
-using RDSon measurement
(value for design guideline to
calculate reproduction of certain
motor current & torque)
Measured to GND
(internalRsense=1)
Internal_Rsense=1,
vsense=0,
IIREF = 0.25mA (after
reaching thermal
balance)
Min Typ Max Unit
260 330 400 kΩ
0 0.5-2.4 V5VOUT/2 V
V5VOUT/2
V
0.5
0.7
1.0
kΩ
3000
Times
38
µA
-10
+10
%
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