LMC8101MM/NOPB National Semiconductor, LMC8101MM/NOPB Datasheet - Page 16

IC OP AMP R-R I/O 8-MSOP

LMC8101MM/NOPB

Manufacturer Part Number
LMC8101MM/NOPB
Description
IC OP AMP R-R I/O 8-MSOP
Manufacturer
National Semiconductor
Datasheet

Specifications of LMC8101MM/NOPB

Amplifier Type
General Purpose
Number Of Circuits
1
Output Type
Rail-to-Rail
Slew Rate
1.2 V/µs
Gain Bandwidth Product
1.3MHz
Current - Input Bias
1pA
Voltage - Input Offset
700µV
Current - Supply
1.1mA
Current - Output / Channel
90mA
Voltage - Supply, Single/dual (±)
2.7 V ~ 10 V, ±1.35 V ~ 5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
-3db Bandwidth
-
Other names
LMC8101MM
LMC8101MMTR
www.national.com
8-Bump micro SMD
8-Bump micro SMD
Application Notes
LOWER THD
When connected to heavier loads, the LMC8101 has lower
THD compared to the LMC7101. For example, with 5V sup-
ply at 10KHz and 2Vpp swing (Av = −2), the LMC8101 THD
(0.2%) is 60% less than the LMC7101’s. The LMC8101 THD
can be kept below 0.1% with 3Vpp at the output for up to
10KHz (refer to the Typical Characteristics Plots).
IMPROVING THE CAP LOAD DRIVE CAPABILITY
This can be accomplished in several ways:
The Phase Margin increases with increasing load (refer to
the Typical Characteristics Plots). When driving capacitive
loads, stability can generally be improved by allowing some
output current to flow through a load. For example, the cap
load drive capability can be increased from 8200pF to
16000pF if the output load is increased from 5kΩ to 600Ω
(A
Ordering Information
V
8-Pin MSOP
Lead Free
= +10, 25% overshoot limit, 10V supply).
Package
Output resistive loading increase:
Leaded
LMC8101MMX
LMC8101BPX
LMC8101TPX
Part Number
LMC8101MM
LMC8101BP
LMC8101TP
(Continued)
Package Marking
A11
08
A
A
2
16
This resistor will isolate the feedback path (where excessive
phase shift due to output capacitance can cause instability)
from the capacitive load. With a 10V supply, a 100Ω isolation
resistor allows unlimited capacitive load without oscillation
compared to only 300pF without this resistor (A
Operating the LMC8101 at higher supply voltages allows
higher cap load tolerance. At 10V, the LMC8101’s low supply
voltage cap load limit of 300pF improves to about 600pF (A
= +1).
As with all Op Amps, the capacitive load tolerance of the
LMC8101 increases with increasing closed loop gain. In
applications where the load is mostly capacitive and the
resistive loading is light, stability increases when the
LMC8101 is operated at a closed loop gain larger than +1.
Isolation resistor between output and cap load:
Higher supply voltage:
Closed loop gain increase:
3.5k Units Tape and Reel
250 Units Tape and Reel
250 Units Tape and Reel
3k Units Tape and Reel
3k Units Tape and Reel
1k Units Tape and Reel
Transport Media
NSC Drawing
BPA08FFB
TPA08FFA
MUA08A
V
= +1).
V

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