TMC603 DATA SHEET (V. 1.06 / 26. Mar. 2009)
36
Current measurement block
Parameter
DC-Characteristics, Timing-Characteristics
VVM = 24 V, VVCC = 5.0 V
Symbol Conditions
Min
-4.3
-17
Typ
-4.6
Max
-4.9
-19
Unit
Amplification of voltage
VBMX to VCURX
for positive voltage (VBMX > 0V)
ACURLO+ SENSE_HI = GND
V/V
V/V
ACURHI+
SENSE_HI = VCC
-18.0
Amplification of voltage
VBMX to VCURX
for negative voltage (VBMX < 0V)
ACURLO-
ACURHI-
SENSE_HI = GND
SENSE_HI = VCC
-4.1
-16
-4.4
-4.7
-18
V/V
V/V
-17.1
Zero current level at CURX
V0CURX
VBMX
VVCC/3
-50mV
VVCC/3
VVCC/3
+50mV
V
Measurement voltage range at
VBMX
SENSE_HI = GND
SENSE_HI = VCC
-250
-80
300
80
mV
mV
V
VCURX output voltage swing low
VCURX output voltage swing high
VCURX
VCURX
VCURX
0.02
0.1
VVCC-1.2 VVCC-0.6
17
V
Ripple voltage / hold step noise
at output
VBMX = 0V
26
75
mV
SENSE_HI = GND
note 2)
VBMX = 0V
50
mV
µs
SENSE_HI = VCC
Minimum low side on time for
current measurement
tBLHICURX SAMPLEx = VCC
3.5
5.3
7.2
(Delay from BLx going active to
CURx tracking amplified signal)
Delay from SAMPLEx going
active to CURx tracking
amplified signal
tSMPHICURX SAMPLEx = VCC
tBLHICURX
/ 2
µs
Delay from BLx or SAMPLEx
going inactive to CURx hold
tBLXLO
dVCURX
dVCURX
0
µs
V/s
V/s
Sample and hold drop during
hold period
0.001
0.003
1.6
3
Auto zero drop of current
amplifier during sampling period
(low side on)
Minimum initial auto zero period
(low side off or SAMPLEx low)
after power on
tBLXLO0
5
µs
Minimum sample period after
tBLXHIADD
1
µs
tBLHICURX for a 100% current step
Output current limit at CURx
ICURX
Current sourcing
0.45
mA
2) Note on first ICs dated before 20/2009:
CURx outputs are sensible to ripple voltage on VCC pin and frequency below 5MHz. Ripple voltage is amplified by 1/3 * Set
amplification, i.e. factor 1.5 with SENSE_HI low and factor 6 with SENSE_HI high. Thus, it is suggested to use 5VOUT only for
VCC supply, if possible, if exact measurements are required.
Copyright © 2008 TRINAMIC Motion Control GmbH & Co. KG
TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
