DRV401-EP Datasheet, PDF (8/33 Pages) Texas Instruments – SENSOR SIGNAL CONDITIONING IC FOR CLOSED-LOOP MAGNETIC CURRENT SENSOR

DRV401-EP
SBVS104 – JANUARY 2008............................................................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS (continued)
At T_A = +25°C and V_DD1 = V_DD2 = +5 V with external 100 kHz filter BW, unless otherwise noted.
DIFFERENTIAL AMPLIFIER:
OFFSET VOLTAGE vs TEMPERATURE, RTO
20
16
12
8
4
Sample Average
0
−4
−8
−12
−16
−20
−50 −25 0
25 50 75 100 125 150
Temperature (_C)
20
15
10
5
0
−5
−10
−15
−20
10
DIFFERENTIAL AMPLIFIER:
GAIN vs FREQUENCY
100
1k
10k 100k
1M
10M
Frequency (Hz)
DIFFERENTIAL AMPLIFIER:
PSRR AND CMRR vs FREQUENCY
120
PSRR
100
80
CMRR
60
40
DIFFERENTIAL AMPLIFIER:
OUTPUT VOLTAGE vs OUTPUT CURRENT
5.0
−40_ C
+25_C
4.9
+125_ C
4.8
+85_C
4.7
0.3
+125_C
+85_ C
0.2
20
0
10
1000
100
1k
10k
100k
Frequency (Hz)
DIFFERENTIAL AMPLIFIER:
OUTPUT NOISE DENSITY
1M 2M
100
Autozero Frequency = 69kHz
Sensor Not Running
e_n = 162nV/√Hz (average over 250Hz to 50kHz)
10
100
1k
10k
100k
1M
Frequency (Hz)
0.1
+25_ C −40_ C
0
0 1 2 3 4 5 6 7 8 9 10
Load Current (mA)
DIFFERENTIAL AMPLIFIER:
SHORT−CIRCUIT CURRENT vs TEMPERATURE
25
20
V_OUT Shorted to 5V
15
10
5
0
−5
−10
−15
−20 _{VOUT Shorted to 0V}
−25
−50 −25 0 25 50 75 100 125 150
Temperature (_ C)
8
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