AC Electrical Characteristics
Unless otherwise specified, all limits guaranteed for T
J
=
25˚C, V
+
=
3V, V−=0V, V
CM
=
V
O
=
V
+
/2, V
PD
=
0.6V and R
L
>
1
MΩ. Boldface limits apply at the temperature extremes (Note 16).
Symbol Parameter Conditions
Typ
(Note 5)
LMC6681AI LMC6681BI
Units
LMC6682AI LMC6682BI
LMC6684AI LMC6684BI
Limit Limit
(Note 6) (Note 6)
t
ON
Time Delay for (Note 15) 50 200 200 µs
Device to Power ON
t
OFF
Time Delay for (Note 15) 0.5 2 2 µs
Device to Power OFF
SR Slew Rate (Note 8) 1.2 0.7 0.7
V/µs
min
0.55 0.55
V
+
=
10V, (Note 10) 1.2 0.7 0.7
0.55 0.55
GBW Gain-Bandwidth Product 1.2 MHz
φ
m
Phase Margin 50 Deg
G
m
Gain Margin 12 dB
Amp-to-Amp Isolation V
+
=
10V (Note 9) 130 dB
e
n
Input-Referred f=1 kHz
32
Voltage Noise V
CM
=
0.5V
i
n
Input-Referred f=1 kHz
0.5
Current Noise
T.H.D. Total Harmonic Distortion f=1 kHz, A
V
=
+1 0.01
%
R
L
=
10 kΩ,V
O
=
2V
PP
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the electrical characteristics.
Note 2: Human body model, 1.5 kΩ in series with 100 pF.
Note 3: Applies to both single-supply and split-supply operation. Continous short circuit operationatelevatedambienttemperature can result in exceeding the maxi-
mum allowed junction temperature of 150˚C. Output current in excess of
±
30 mA over long term may adversely affect reliability.
Note 4: The maximum power dissipation is a function of T
J (max)
, θJA, and TA. The maximum allowable power dissipation at any ambient temperature is P
D
=
(T
J(max)
−TA)/θJA. All numbers apply for packages soldered directly into a PC board.
Note 5: Typical Values represent the most likely parametric norm.
Note 6: All limits are guaranteed by testing or statistical analysis.
Note 7: V
+
=
3V, V
CM
=
0.5V. For sourcing and sinking, 0.5V ≤ V
O
≤ 2.5V.
Note 8: V
+
=
3V. Connected as Voltage Follower with 2V step input, and the output is measured from 15%–85%. Number specified is the slower of the positive or
negative slew rates.
Note 9: Input referred, V
+
=
10V, and R
L
=
100 kΩ connected to 5V. Each amp excited in turn with 1 kHz to produce V
O
=
2V
PP
.
Note 10: V
+
=
10V.Connected as voltage follower with 8V step Input, and output is measured from 15%–85%. Number specified is the slower of the positive or nega-
tive slew rates.
Note 11: Limiting input pin current is only necessary for input voltages that exceed absolute maximum input voltage ratings.
Note 12: Guaranteed limits are dictated by tester limitations and not device performance. Actual performance is reflected in the typical value.
Note 13: CMRR
+
and CMRR−are tested, and the number indicated is the lower of the two values. For CMRR+,V+/2<V
CM
<
V+for 1.8V, 2.2V, 3V, 5V, and 10V.
For CMRR
−
,0<V
CM
<
V+/2 for 3V, 5V and 10V. For 1.8V and 2.2V, 0.25<V
CM
<
V+− 0.3.
Note 14: V
+
=
10V, V
CM
=
0.5V. For Sourcing tests, 1V ≤ V
O
≤ 5V. For Sinking tests, 5V ≤ VO≤ 9V.
Note 15: The propogation delays are measured using an input waveform of f=5 Hz, and magnitude of 2.4V. Refer to Section 6.3 and
Figures 14, 15
for a detailed
explanation.
Note 16: The V
PD
(threshold low and threshold high) limits are guaranteed at room temperature and at temperature extremes. Room temperature limits are production tested. Limits at temperature extremes are guaranteed via correlation using temperature regression analysis methods. Refer to Section 6.2 for an overview of
the threshold voltages.
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