Datasheet

LM614
www.ti.com SNOSC21C –MAY 1998–REVISED MARCH 2013
Electrical Characteristics (continued)
These specifications apply for V
−
= GND = 0V, V
+
= 5V, V
CM
= V
OUT
= 2.5V, I
R
= 100μA, FEEDBACK pin shorted to GND,
unless otherwise specified. Limits in standard typeface are for T
J
= 25°C; limits in Boldface type apply over the Operating
Temperature Range.
Symbol Parameter Conditions Typ
(1)
LM614I Units
LM614C
Limits
(2)
I
OS1
Average Offset
4 pA/°C
ΔT Drift Current
R
IN
Input Resistance Differential 1800 MΩ
Common-Mode 3800 MΩ
C
IN
Input Capacitance Common-Mode Input 5.7 pF
e
n
Voltage Noise f = 100 Hz, Input Referred 74 nV/√Hz
I
n
Current Noise f = 100 Hz, Input Referred 58 fA/√Hz
CMRR Common-Mode V
+
= 30V, 0V ≤ V
CM
≤ (V
+
− 1.8V), 95 75 dB min
Rejection Ratio CMRR = 20 log (ΔV
CM
/ΔV
OS
) 90 70 dB min
PSRR Power Supply 4V ≤ V
+
≤ 30V, V
CM
= V
+
/2, 110 75 dB min
Rejection Ratio PSRR = 20 log (ΔV
+
/ΔV
OS
) 100 70 dB min
A
V
Open Loop R
L
= 10 kΩ to GND, V
+
= 30V, 500 94 V/mV
Voltage Gain 5V ≤ V
OUT
≤ 25V 50 40 min
SR Slew Rate V
+
= 30V
(3)
±0.70 ±0.50
V/μs
±0.65 ±0.45
GBW Gain Bandwidth C
L
= 50 pF 0.8 MHz
0.52 MHz
V
O1
Output Voltage R
L
= 10 kΩ to GND V
+
− 1.4 V
+
− 1.8 V min
Swing High V
+
= 36V (32V for LM614C) V
+
− 1.6 V
+
− 1.9 V min
V
O2
Output Voltage R
L
= 10 kΩ to V
+
V
−
+ 0.8 V
−
+ 0.95 V max
Swing Low V
+
= 36V (32V for LM614C) V
−
+ 0.9 V
−
+ 1.0 V max
I
OUT
Output Source V
OUT
= 2.5V, V
+IN
= 0V, 25 16 mA min
V
−IN
= −0.3V 15 13 mA min
I
SINK
Output Sink V
OUT
= 1.6V, V
+IN
= 0V, 17 13 mA min
Current V
−IN
= 0.3V 9 8 mA min
I
SHORT
Short Circuit Current V
OUT
= 0V, V
+IN
= 3V, 30 50 mA max
V
−IN
= 2V, Source 40 60 mA max
V
OUT
= 5V, V
+IN
= 2V, 30 70 mA max
V
−IN
= 3V, Sink 32 90 mA max
VOLTAGE REFERENCE
V
R
Voltage Reference See
(4)
1.244 1.2191 V min
1.2689 V max
(±2.0%)
ΔV
R
Average Temperature Drift See
(5)
10 150 PPM/°C
ΔT max
ΔV
R
Hysteresis See
(6)
3.2 μV/°C
ΔT
J
V
R
Change V
R(100 μA)
− V
R(17 μA)
0.05 1 mV max
with Current 0.1 1.1 mV max
ΔV
R
ΔI
R
V
R(10 mA)
− V
R(100 μA)
(7)
1.5 5 mV max
2.0 5.5 mV max
(3) Slew rate is measured with op amp in a voltage follower configuration. For rising slew rate, the input voltage is driven from 5V to 25V,
and the output voltage transition is sampled at 10V and @20V. For falling slew rate, the input voltage is driven from 25V to 5V, and the
output voltage transition is sampled at 20V and 10V.
(4) V
R
is the Cathode-feedback voltage, nominally 1.244V.
(5) Average reference drift is calculated from the measurement of the reference voltage at 25°C and at the temperature extremes. The drift,
in ppm/°C, is 10
6
•ΔV
R
/(V
R[25°C]
•ΔT
J
), where ΔV
R
is the lowest value subtracted from the highest, V
R[25°C]
is the value at 25°C, and ΔT
J
is the temperature range. This parameter is ensured by design and sample testing.
(6) Hysteresis is the change in V
R
caused by a change in T
J
, after the reference has been “dehysterized”. To dehysterize the reference; that
is minimize the hysteresis to the typical value, cycle its junction temperature in the following pattern, spiraling in toward 25°C: 25°C,
85°C, −40°C, 70°C, 0°C, 25°C.
(7) Low contact resistance is required for accurate measurement.
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