LM231, LM331
SNOSBI2B –JUNE 1999–REVISED MARCH 2013
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These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)(2)(3)
Supply Voltage, VS
40V
Continuous
Continuous
−0.2V to +VS
Output Short Circuit to Ground
Output Short Circuit to VCC
Input Voltage
(4)
Package Dissipation at 25°C
Lead Temperature (Soldering, 10 sec.)
PDIP
1.25W
260°C
500V
(5)
ESD Susceptibility
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not
apply when operating the device beyond its specified operating conditions.
(2) All voltages are measured with respect to GND = 0V, unless otherwise noted.
(3) If Military/Aerospace specified devices are required, please contact the TI Sales Office/Distributors for availability and specifications.
(4) The absolute maximum junction temperature (TJmax) for this device is 150°C. The maximum allowable power dissipation is dictated by
TJmax, the junction-to-ambient thermal resistance (θJA), and the ambient temperature TA, and can be calculated using the formula
PDmax = (TJmax - TA) / θJA. The values for maximum power dissipation will be reached only when the device is operated in a severe
fault condition (e.g., when input or output pins are driven beyond the power supply voltages, or the power supply polarity is reversed).
Obviously, such conditions should always be avoided.
(5) Human body model, 100 pF discharged through a 1.5 kΩ resistor.
(1)
Operating Ratings
Operating Ambient Temperature
LM231, LM231A
LM331, LM331A
Supply Voltage, VS
−25°C to +85°C
0°C to +70°C
+4V to +40V
(1) All voltages are measured with respect to GND = 0V, unless otherwise noted.
Package Thermal Resistance
Package
θJ-A
8-Lead PDIP
100°C/W
Electrical Characteristics
All specifications apply in the circuit of Figure 16, with 4.0V ≤ VS ≤ 40V, TA=25°C, unless otherwise specified.
Parameter
Conditions
4.5V ≤ VS ≤ 20V
MIN ≤ TA ≤ TMAX
Min
Typ
Max
±0.01
±0.02
±0.14
Units
±0.003
±0.006
±0.024
% Full- Scale
% Full- Scale
%Full- Scale
(1)
VFC Non-Linearity
T
VFC Non-Linearity in Circuit of Figure 15
Conversion Accuracy Scale Factor (Gain)
LM231, LM231A
VS = 15V, f = 10 Hz to 11 kHz
VIN = −10V, RS = 14 kΩ
0.95
0.90
1.00
1.00
1.05
1.10
kHz/V
kHz/V
LM331, LM331A
Temperature Stability of Gain
LM231/LM331
T
MIN ≤ TA ≤ TMAX, 4.5V ≤ VS ≤ 20V
±30
±20
±150
±50
0.1
ppm/°C
ppm/°C
%/V
LM231A/LM331A
4.5V ≤ VS ≤ 10V
10V ≤ VS ≤ 40V
VIN = −10V
0.01
0.006
Change of Gain with VS
0.06
%/V
Rated Full-Scale Frequency
10.0
kHz
Gain Stability vs. Time (1000 Hours)
TMIN ≤ TA ≤ TMAX
±0.02
% Full- Scale
(1) Nonlinearity is defined as the deviation of fOUT from VIN × (10 kHz/−10 VDC) when the circuit has been trimmed for zero error at 10 Hz
and at 10 kHz, over the frequency range 1 Hz to 11 kHz. For the timing capacitor, CT, use NPO ceramic, Teflon®, or polystyrene.
2
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