Datasheet

TMC2590 DATASHEET (V1.0 / 2019-FEB-22) 7
www.trinamic.com
Pin
Number
Type
Function
LA2
7
on MOSFET.
LB1
19
LB2
18
SRA
8
AI
Sense resistor input for coil current measurement. Connect to upper
side of sense resistor.
SRB
17
SRAL
28
AI
Sense resistor negative input for coil current measurement. For best
results, connect to lower side of sense resistor using Kelvin
connection, or connect to GND plane near the respective sense
resistor’s GND terminal.
SRBL
13
5VOUT
9
Output of internal 5V linear regulator. This voltage is used to
supply the low side drivers and internal analog circuitry. An
external capacitor to GND close to the pin is required. Place the
capacitor near to pin 9. 470nF ceramic are sufficient for most
applications, a higher capacity up to 10µF improves performance
with high gate charge MOSFETs.
SDO
10
DO VIO
Data output of SPI interface (Tristate)
SDI (CFG3)
11
DI VIO
Data input of SPI interface /
Microstep resolution control input in standalone mode:
0: MRES=256 microsteps; 1: MRES=16 microsteps with interpolation
SCK (CFG2)
12
DI VIO
Serial clock input of SPI interface /
Chopper hysteresis control input in standalone mode:
0: HEND=4, HSTRT=2; 1: HEND=4, HSTRT=6
CSN (CFG1)
14
DI VIO
Chip select input of SPI interface /
Current control input in standalone mode:
0: Current scale CS=15; 1: Current scale CS=31
ENN
15
DI VIO
Enable not input for drivers. Switches off all MOSFETs. Tie low for
normal operation.
CLK
16
DI VIO
Clock input for all internal operations. Tie low to use internal
oscillator. Automatically switches to external clock, when the first
high signal is recognized.
VHS
24
High side supply voltage (motor supply voltage VS - 10V). Attach a
ceramic capacitor between VHS and VS. Typ. 220nF to 1µF, 16V.
VS
25
Motor supply voltage. Tie to positive supply voltage of MOSFET
bridge.
ST_ALONE
26
DI VIO
(pd)
Stand-alone mode selection. Tie to VCC_IO for non-SPI, stand-alone
mode. Leave open for normal operation. Internal 10k pulldown
resistor.
SG_TST
27
DO VIO
StallGuard2™ output. Signals motor stall (high active). Evaluate only
when at sufficient velocity.
VCC_IO
29
Input / output supply voltage VIO for all digital pins. Tie to digital
logic supply voltage. Allows operation in 3.3V and 5V systems.
DIR
30
DI VIO
Direction input. Is sampled upon detection of a step to determine
stepping direction. An internal glitch filter for 20ns is provided.
STEP
31
DI VIO
Step input. An internal glitch filter for 20ns is provided.
TST_MODE
32
DI VIO
(pd)
Test mode input. Puts IC into test mode. Tie to GND for normal
operation using a short wire to GND plane. Internal 166k pull down
resistor for safety. No user functionality.