DRV401 Datasheet, PDF (9/28 Pages) Burr-Brown (TI) – Sensor Signal Conditioning IC for Closed-Loop Magnetic Current Sensor

DRV401
www.ti.com
SBVS070A − JUNE 2006 − REVISED OCTOBER 2006
TYPICAL CHARACTERISTICS (Continued)
At T_A = +25°C and V_DD1 = V_DD2 = +5V with external 100kHz filter BW, unless otherwise noted.
50.250
DIFFERENTIAL AMPLIFIER:
REF_IN RESISTANCE vs TEMPERATURE
50.125
50.000
49.875
49.750
49.625
−50 −25 0
25 50 75 100 125 150
Temperature (_ C)
2000
COMPENSATION LOOP:
DUTY CYCLE ERROR vs TEMPERATURE
1500
1000
500
0
−500
At 250kHz, 5.0V
−1000
−1500
At 400kHz, 5.0V
−2000
−50 −25 0
25 50 75 100 125 150
Temperature (_ C)
5.00
4.75
4.50
4.25
4.00
1.00
0.75
0.50
0.25
0
0
I_COMP OUTPUT SWING TO RAIL
vs OUTPUT CURRENT
+125_C +25_ C −50_ C
+125_C +25^_ C −50_ C
50
100
150
200
250
300
Output Current (mA)
COMPENSATION LOOP:
SMALL−SIGNAL GAIN
70
60
50
40
Pin Gain = High
30
Pin Gain = Low
20
10
0
100
1k
10k
Frequency (Hz)
100k
COMPENSATION LOOP:
DC GAIN: DUTY CYCLE ERROR CHANGE
V_ICOMP1 − V_ICOMP2 = 4.2V
I_LOAD = 210mA
Gain Pin Low
Gain (ppm/V)
PROBE COMPARATOR THRESHOLD
CURRENT vs TEMPERATURE
35.0
32.5
30.0
27.5
25.0
−50 −25 0
25 50 75 100 125 150
Temperature (_ C)
9