LT1218L

Manufacturer Part NumberLT1218L
DescriptionPrecision Rail-to-rail Input And Output Op Amp
ManufacturerLinear Technology Corporation
LT1218L datasheet
 


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FEATURES
Rail-to-Rail Input and Output
90 V V
for V
= V
to V
OS(MAX)
CM
High Common Mode Rejection Ratio: 97dB Min
TM
C-Load
Stable Version (LT1219)
High A
: 500V/mV Minimum Driving 10k Load
VOL
Wide Supply Range:
2V to 15V (LT1218/LT1219)
2V to 5V (LT1218L/LT1219L)
Shutdown Mode: I
< 30 A
S
Low Supply Current: 420 A Max
Low Input Bias Current: 18nA Typical
300kHz Gain-Bandwidth Product (LT1218)
Slew Rate: 0.10V/ s (LT1218)
U
APPLICATIONS
Driving A/D Converters
Test Equipment Amplifiers
MUX Amplifiers
, LTC and LT are registered trademarks of Linear Technology Corporation.
C-Load is a trademark of Linear Technology Corporation.
U
TYPICAL
APPLICATION
MUX Amplifier
5V
+
V
IN1
LT1218L
5V
+
V
IN2
LT1218L
INPUT
SELECT
74HCO4
Precision Rail-to-Rail Input
DESCRIPTION
®
The LT
1218/LT1219 are bipolar op amps which combine
+
rail-to-rail input and output operation with precision speci-
fications. Unlike other rail-to-rail amplifiers, the LT1218/
LT1219’s input offset voltage is a low 90 V across the
entire rail-to-rail input range, not just a portion of it. Using
a patented technique, both input stages of the LT1218/
LT1219 are trimmed: one at the negative supply and the
other at the positive supply. The resulting common mode
rejection of 97dB minimum is much better than other rail-
to-rail input op amps. A minimum open-loop gain of
500V/mV into a 10k load virtually eliminates all gain error.
The LT1218 has conventional compensation which
assures stability for capacitive loads of 1000pF or less.
The LT1219 has compensation that requires the use of a
0.1 F output capacitor, which improves the amplifier’s
supply rejection and reduces output impedance at high
frequencies. The output capacitor’s filtering action also
reduces high frequency noise, which is beneficial when
driving A/D converters.
High and low voltage versions of the devices are offered.
Operation is specified for 3V, 5V and 5V supplies for the
LT1218L/LT1219L and 3V, 5V and 15V for the LT1218/
LT1219.
V
OUT
SHDN
MAXIMUM IN
SHDN
TO OUT ERROR
= 110 V FOR
0.05V V
4.8V
IN
R
= 10k
L
1218/19 • TA01
LT1218/LT1219
and Output Op Amps
U
Voltage Follower Input to Output Error
10
V
= 5V
S
A
= 1
V
NO LOAD
1.0
MAX ERROR = 110 V
0.1
0.05V V
4.8V
IN
0.01
0
1
2
3
4
5
0.05
4.95
INPUT VOLTAGE (V)
LT1218/19 • TA02
1

LT1218L Summary of contents

  • Page 1

    ... The output capacitor’s filtering action also reduces high frequency noise, which is beneficial when driving A/D converters. High and low voltage versions of the devices are offered. Operation is specified for 3V, 5V and 5V supplies for the LT1218L/LT1219L and 3V, 5V and 15V for the LT1218/ LT1219. V OUT SHDN ...

  • Page 2

    ... LT1218/LT1219 ABSOLUTE MAXIMUM Supply Voltage LT1218/LT1219 ................................................. 18V LT1218L/LT1219L ............................................... 8V Input Current ...................................................... 15mA Output Short-Circuit Duration (Note 1) ......... Continuous Operating Temperature Range ................ – Specified Temperature Range (Note 3) ... – Storage Temperature Range ................. – 150 C Junction Temperature........................................... 150 C Lead Temperature (Soldering, 10 sec).................. 300 C ...

  • Page 3

    ... ELECTRICAL CHARACTERISTICS 5V, 0V 3V, 0V SYMBOL PARAMETER SR Slew Rate (LT1218/LT1218L) (LT1219/LT1219L) GBW Gain Bandwidth Product (LT1218/LT1218L) (LT1219/LT1219L 5V, 0V 3V, 0V SYMBOL PARAMETER V Input Offset Voltage Input Offset Drift OS V Input Offset Voltage Shift ...

  • Page 4

    ... Power Supply Rejection Ratio V Output Voltage Swing LOW OL V Output Voltage Swing HIGH OH I Short-Circuit Current SC I Supply Current S Positive Supply Current, SHDN LT1218L/LT1219L only 5V SYMBOL PARAMETER V Input Offset Voltage OS V Input Offset Voltage Shift OS I Input Bias Current ...

  • Page 5

    ... Common Mode Rejection Ratio V Output Voltage Swing LOW OL V Output Voltage Swing HIGH OH I Short-Circuit Current SC I Supply Current S Positive Supply Current, SHDN LT1218L, LT1219L only; – SYMBOL PARAMETER V Input Offset Voltage OS V Input Offset Voltage Shift OS I Input Bias Current B ...

  • Page 6

    ... Power Supply Rejection Ratio V Output Voltage Swing LOW OL V Output Voltage Swing HIGH OH I Short-Circuit Current SC I Supply Current S Positive Supply Current, SHDN SR Slew Rate (LT1218/LT1218L) (LT1219/LT1219L GBW Gain Bandwidth Product (LT1218/LT1218L) (LT1219/LT1219L) LT1218/LT1219 only SYMBOL PARAMETER V Input Offset Voltage OS ...

  • Page 7

    ELECTRICAL CHARACTERISTICS LT1218/LT1219 only SYMBOL PARAMETER I Short-Circuit Current SC I Supply Current S Positive Supply Current, SHDN LT1218, LT1219 only; – SYMBOL PARAMETER V Input ...

  • Page 8

    LT1218/LT1219 W U TYPICAL PERFORMANCE CHARACTERISTICS V Distribution 5V –100 –60 – 100 INPUT OFFSET VOLTAGE ( V) ...

  • Page 9

    W U TYPICAL PERFORMANCE CHARACTERISTICS Noise Voltage Spectrum 100 100 FREQUENCY (Hz) LT1218 Gain and Phase Shift vs Frequency 2.5V ...

  • Page 10

    LT1218/LT1219 W U TYPICAL PERFORMANCE CHARACTERISTICS LT1218 Power Supply Rejection Ratio vs Frequency 100 POSITIVE SUPPLY NEGATIVE SUPPLY 100 1000 FREQUENCY (kHz) LT1218/19 • ...

  • Page 11

    W U TYPICAL PERFORMANCE CHARACTERISTICS THD + Noise vs Peak-to-Peak Voltage 1kHz R = 10k L (ALL CURVES – ...

  • Page 12

    LT1218/LT1219 APPLICATIONS INFORMATION output stage with rail-to-rail swing. The amplifier is fabri- cated on Linear Technology’s proprietary complementary bipolar process, which ensures very similar DC and AC characteristics for the output devices Q24 and Q26. A simple ...

  • Page 13

    U U APPLICATIONS INFORMATION Shutdown The biasing of the LT1218/LT1219 is controlled by the SHDN pin. When the SHDN pin is low, the part is shut down. In the shutdown mode, the output looks like a 40pF capacitor and the ...

  • Page 14

    LT1218/LT1219 APPLICATIONS INFORMATION compensation. The output capacitance forms a filter, which reduces pickup from the supply and lowers the output impedance. This additional filtering is helpful in mixed analog/digital systems with common supplies or systems employing switching ...

  • Page 15

    ... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

  • Page 16

    ... CC 10 CSADC 6 CSMUX 5, 14 12-BIT CLK + SAMPLING ADC OUT 7 – LTC1598 GND 4, 9 1218/19 • TA05 , 100nV/ C Drift, 0.7MHz GBW, 0.5V/ s OS(MAX) , 400kHz GBW, 0.13V/ s Slew Rate, , OS(MAX) 12189f LT/TP 0697 7K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1997 ...