DRV401_15 Datasheet, PDF (6/36 Pages) Texas Instruments – Sensor Signal Conditioning IC for Closed-Loop Magnetic Current Sensor

DRV401
SBVS070B − JUNE 2006 − REVISED MAY 2009
TYPICAL CHARACTERISTICS
At T_A = +25°C and V_DD1 = V_DD2 = +5V with external 100kHz filter BW, unless otherwise noted.
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0.04
DRV401 AND SENSOR:
OFFSET vs SUPPLY VOLTAGE
0.03
0.02
0.01
MM44664455−−XX221111
0
−0.01
M4645−X080
−0.02
−0.03
−0.04
4.1 4.3 4.5 4.7 4.9 5.1 5.3 5.5 5.7 5.9 6.1
V_DD (V)
DRV401 AND SENSOR: ABSOLUTE ERROR
(Soldered DWP−20 with 1 Square−Inch Copper Pad)
(Measurements by Vacuumschmelza GmbH)
0.3
T = −50_ C
0.2
T = +25_C
T = +85_C
T = +125_ C
0.1
0
−0.1
−0.2
T_C (R_SHUNT) ±25ppm/_ C.
−0.3
−300 −200 −100
0
100
200
300
Primary Current (A)
3A I_COMP OVERLOAD RECOVERY
(Measurements by Vacuumschmelze GmbH)
Over−Range
Over−Range
V_OUT
V_OUT
ERROR
ERROR
I_PRIM
NOTE: I_PRIM = 3000A corresponds to I_COMP = 3A.
I_PRIM
0 20 40 60 80 100 120 140 160 180 200
Time (µs)
DRV401 AND SENSOR:
OUTPUT VOLTAGE NOISE DENSITY
(Sensor M4645−X080, R_SHUNT = 10Ω, Mode = Low)
100
60Hz Line Frequency and Multiples
(measured in a 60Hz environment)
Divided Field
Probe Frequency
10
0.1
0.1
1
10
100
1k
10k
100k
Frequency (Hz)
GAIN FLATNESS vs FREQUENCY
(Measurements by Vacuumschmelze GmbH)
1.20
DRV401 with M4645−X600 Sensor
1.15
DRV401 with M4645−X211 Sensor
DRV401 with M4645−X080 Sensor
1.10
1.05
1.00
0.95
0.90
0.85
0.80
10
100
1k
10k
100k
1M
Frequency (Hz)
DIFFERENTIAL AMPLIFIER:
VOLTAGE OFFSET PRODUCTION DISTRIBUTION
RTO
Voltage Offset (µV)
6