LT6108-1_15 Datasheet, PDF (6/30 Pages) Linear Technology – High Side Current Sense Amplifier with Reference and Comparator

LT6108-1/LT6108-2
TYPICAL PERFORMANCE CHARACTERISTICS _V+
=
12V,
V_PULLUP
=
V⁺,
V_EN
=
V_EN/RST
=
2.7V,
R_IN
=
100Ω,
R_OUT
=
R1
+
R2
=
10k,
Performance
gain = 100, R_C
characteristics taken at T_A = 25°C,
= 25.5k, C_L = C_LC = 2pF, unless
otherwise noted. (See Figure 3)
Supply Current vs Supply Voltage
600
Start-Up Supply Current
Enable/Disable Response
500
V⁺
400
5V/DIV
0V
V_EN/RST
2V/DIV
300
0V
200
100
0
0
I_S
500µA/DIV
0µA
10 20 30 40 50 60
SUPPLY VOLTAGE (V)
610812 G01
10µs/DIV
I_S
500µA/DIV
0µA
610812 G02
100µs/DIV
610812 G03
Input Offset Voltage
vs Temperature
300
5 TYPICAL UNITS
200
100
0
–100
–200
–300
–40 –25 –10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
610812 G04
Amplifier Offset Voltage
vs Supply Voltage
100 _{5 TYPICAL UNITS}
80
60
40
20
0
–20
–40
–60
–80
–100
0
10 20 30 40
SUPPLY VOLTAGE (V)
50 60
610812 G05
Offset Voltage Drift Distribution
12
10
8
6
4
2
0
–2 –1.5 –1 –0.5 0 0.5 1 1.5 2
OFFSET VOLTAGE DRIFT (µV/°C)
610812 G38
Amplifier Gain Error
vs Temperature
0.02
0
–0.02
–0.04
R_IN = 1k
–0.06
–0.08
R_IN = 100Ω
–0.10
–0.12
–0.14
–016
V_SENSE = 5mV TO 100mV
–0.18
–50 –25 0 25 50 75
TEMPERATURE (°C)
100 125
610812 G06
6
Amplifier Gain Error Distribution
25 _{VSENSE = 5mV TO 100mV}
20
15
10
5
0
–0.048 –0.052 –0.056 –0.060 –0.064 –0.068
GAIN ERROR (%)
610812 G07
Amplifier Output Swing
vs Temperature
0.50
0.45
0.40
V⁺ = 12V
0.35
V_SENSE = 120mV
0.30
0.25
0.20
0.15
V⁺ = 2.7V
0.10
V_SENSE = 27mV
0.05
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
610812 G18
610812fa