LM363 Datasheet, PDF (17/22 Pages) National Semiconductor (TI) – LM363 Precision Instrumentation Amplifier

Typical Applications (Continued)
Low Frequency Rolloff (AC Coupling)
1
f1e
e1 Hz
2qC1(50 kX)
f2e100 f1 e 100Hz
Reduced DC voltage gain
attenuates offset error and
1 f noise by a factor of 100
TL H 5609 – 25
Precision Comparator with Balanced Inputs and Variable Offset
Boosted Current Source with Limiting
t_pdj15 mS at 1 mV overdrive
DV_OUTeV2a0 6V
Hysteresise ^DVOUT e2 mV
G(R1aR2)
OffseteV_SENSE ^G
g1 3V range
Thermocouple Amplifier with Cold Junction Compensation
R1eR2
I_Oe^GRV2IN
I_MAX
e
V_BE
R2
j60 mA
TL H 5609 – 26
Input protection circuitry allows
thermocouple to short to 120 V_AC without
damaging amplifier
Calibration
1) Apply 50 mV signal in place of thermocouple
Trim R3 for V_OUTe12 25V
2) Reconnect thermocouple Trim R9 for correct
output
TL H 5609 – 27
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