AMC7834 Datasheet, PDF (22/93 Pages) Texas Instruments – AMC7834 12-Bit Integrated Power-Amplifier Monitor and Control System with Temperature, Current and Voltage Supervision Capabilities

AMC7834
SLAS972B – NOVEMBER 2014 – REVISED MARCH 2016
6.12.3 Typical Characteristics: Current Sense
0.5
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
±40 ±25 ±10 5 20 35 50 65 80 95 110 125
T_A (ƒC)
C032
V_CM = 28 V, V_SENSE = 0 V, CS-FILTER[2:0] = 100
Figure 37. Current Sense Offset Voltage vs Temperature
1.0
0.8
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
4
8 12 16 20 24 28 32 36 40 44 48 52 56 60
Common Mode (V)
C034
Figure 39. Current Sense Gain Error vs Common-Mode
Voltage
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0.5
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
±40 ±25 ±10 5 20 35 50 65 80 95 110 125
T_A (ƒC)
C033
V_CM = 28 V
Figure 38. Current Sense Gain Error vs Temperature
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
10
100
1k
10k
100k
1M
Frequency (Hz)
C035
CS-FILTER[2:0] = 100
Figure 40. Current Sense CMRR vs Frequency
22
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