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| DRV401-Q1 Datasheet, PDF (6/39 Pages) Texas Instruments – DRV401-Q1 Sensor Signal Conditioning Device for Closed-Loop Magnetic Current Sensor | |||
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DRV401-Q1
SBOS814 â DECEMBER 2016
www.ti.com
Electrical Characteristics (continued)
at TA = 25°C and VDD1 = VDD2 = 5 V with external 100-kHz filter bandwidth (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
RL = 10 kΩ to 2.5 V
Settling time, large-signal(2)
VREFIN = 2.5 V
0.9
dV ±2 V to 1%, no external filter
tS
RL = 10 kΩ to 2.5 V
Settling time(2)
VREFIN = 2.5 V
14
dV ±0.4 V to 0.01%
INPUT RESISTANCE
Differential
Common-mode
NOISE
External reference input
RL = 10 kΩ to 2.5 V
VREFIN = 2.5 V
RL = 10 kΩ to 2.5 V
VREFIN = 2.5 V
RL = 10 kΩ to 2.5 V
VREFIN = 2.5 V
16.5
20
41
50
41
50
en
Output voltage noise density,
RTO (2)
RL = 10 kΩ to 2.5 V
VREFIN = 2.5 V
f = 1 kHz, compensation loop disabled
170
COMPENSATION LOOP
DC STABILITY
Offset error (3)
Probe f = 250 kHz, RLOAD = 20 Ω,
deviation from 50% PWM,
pin gain = L
0.03%
Offset error drift (2)
Gain (2)
PSRR Power-supply rejection ratio
FREQUENCY RESPONSE
Probe f = 250 kHz, RLOAD = 20 Ω,
deviation from 50% PWM,
7.5
pin gain = L, TA = â40°C to 125°C
Probe f = 250 kHz, RLOAD = 20 Ω, pin gain
= L,
â200
25
|VICOMP1| â |VICOMP2|
Probe f = 250 kHz, RLOAD = 20 Ω
500
Open-loop gain
Probe f = 250 kHz, RLOAD = 20 Ω, two
modes, 7.8 kHz
24/32
PROBE COIL LOOP
RHIGH
Input voltage clamp range
Field probe current < 50 mA
Internal resistor, IS1 or IS2 to VDD1
(2)
â0.7 to
VDD + 0.7
V
47
59
MAX UNIT
µs
µs
23.5 kΩ
59 kΩ
59 kΩ
nV/âHz
ppm/°C
200 ppm/V
ppm/V
dB
71 Ω
RLOW
Internal resistor, IS1 or IS2 to
GND1 (2)
Resistance mismatch between IS1
and IS2 (2)
Total input resistance
Comparator threshold current
Minimum probe loop half-cycle (2)
Probe loop minimum frequency
No oscillation detect (error)
suppression
COMPENSATION COIL DRIVER, H-BRIDGE
Peak current (2)
Voltage swing
ppm of RHIGH + RLOW
TA = â40°C to 125°C
ICOMP = 0 mA
VICOMP1 â VICOMP2 = 4 VPP
TA = â40°C to 125°C
ICOMP = 0 mA
20-Ω load
60
75
90 Ω
300
1500 ppm
134
200 Ω
22
28
34 mA
250
280
310 ns
250
kHz
35
µs
250
mA
4.2
VPP
(3) For VAC sensors, 0.2% of PWM offset approximately corresponds to 10-mA primary current per offset per winding.
6
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