LT1218 LINER [Linear Technology], LT1218 Datasheet

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LT1218

Manufacturer Part Number
LT1218
Description
Precision Rail-to-Rail Input and Output Op Amps
Manufacturer
LINER [Linear Technology]
Datasheet

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FEATURES
APPLICATIONS
C-Load is a trademark of Linear Technology Corporation.
TYPICAL
, LTC and LT are registered trademarks of Linear Technology Corporation.
Rail-to-Rail Input and Output
90 V V
High Common Mode Rejection Ratio: 97dB Min
C-Load
High A
Wide Supply Range:
Shutdown Mode: I
Low Supply Current: 420 A Max
Low Input Bias Current: 18nA Typical
300kHz Gain-Bandwidth Product (LT1218)
Slew Rate: 0.10V/ s (LT1218)
Driving A/D Converters
Test Equipment Amplifiers
MUX Amplifiers
2V to 15V (LT1218/LT1219)
2V to 5V (LT1218L/LT1219L)
SELECT
INPUT
VOL
OS(MAX)
TM
V
V
IN1
IN2
Stable Version (LT1219)
: 500V/mV Minimum Driving 10k Load
APPLICATION
for V
74HCO4
U
S
< 30 A
CM
MUX Amplifier
= V
+
+
LT1218L
LT1218L
5V
5V
to V
U
SHDN
SHDN
+
1218/19 • TA01
MAXIMUM IN
TO OUT ERROR
= 110 V FOR
0.05V V
R
V
L
OUT
= 10k
IN
4.8V
The LT
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.
DESCRIPTION
®
Precision Rail-to-Rail Input
1218/LT1219 are bipolar op amps which combine
0.01
1.0
0.1
and Output Op Amps
10
Voltage Follower Input to Output Error
0
V
A
NO LOAD
0.05
S
V
U
= 5V
= 1
1
MAX ERROR = 110 V
INPUT VOLTAGE (V)
0.05V V
2
LT1218/LT1219
IN
3
4.8V
4
LT1218/19 • TA02
4.95
5
1

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LT1218 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

... 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 SR Slew Rate (LT1218/LT1218L) (LT1219/LT1219L) GBW Gain-Bandwidth Product (LT1218/LT1218L) (LT1219/LT1219L half supply unless otherwise noted. (Note SHDN ...

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

... 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 V Input Offset Voltage Shift OS I Input Bias Current B I ...

Page 7

... SOURCE SHDN Note 2: This parameter is not 100% tested. Note 3: The LT1218/LT1219 are designed, characterized and expected to meet these extended temperature limits, but are not tested at –40 C and 85 C. Guaranteed I grade part are available: consult factory. LT1218/LT1219 MIN TYP MAX ...

Page 8

... Output Saturation Voltage vs Load Current (Output High 5V 0 – 0.01 0.001 0.001 0.01 0 LOAD CURRENT (mA) LT1218/19 • TPC08 V Distribution 5V –100 –60 – 100 INPUT OFFSET VOLTAGE ( V) LT1218/19 • ...

Page 9

... W U TYPICAL PERFORMANCE CHARACTERISTICS Noise Voltage Spectrum 100 100 FREQUENCY (Hz) LT1218 Gain and Phase Shift vs Frequency 2. PHASE GAIN 10 0 –10 –20 – 100 FREQUENCY (kHz) LT1218 Gain Bandwidth and ...

Page 10

... LT1218 Power Supply Rejection Ratio vs Frequency 100 POSITIVE SUPPLY NEGATIVE SUPPLY 100 1000 FREQUENCY (kHz) LT1218/19 • TPC17 LT1218 Capacitive Load Handling 2. 100 1000 ...

Page 11

... INPUT VOLTAGE (PEAK-TO-PEAK) LT1218/19 • TPC26 U U APPLICATIONS INFORMATION Rail-to-Rail Operation The LT1218/LT1219 differ from conventional op amps in the design of both the input and output stages. Figure 1 shows a simplified schematic of the amplifier. The input stage consists of two differential amplifiers, a PNP stage + V BIAS ...

Page 12

... COMMON MODE VOLTAGE RELATIVE TO Figure 3. Input Bias Current vs Common Mode Voltage – –100 V 100 300 500 S POSITIVE SUPPLY (mV) LT1218/19 • F02 – 400 –200 V 200 S NEGATIVE SUPPLY (mV) LT1218/19 • F03 ...

Page 13

... LT1218/19 • F04a 0V Improved Supply Rejection in the LT1219 0V The LT1219 is a variation of the LT1218 offering greater supply rejection and lower high frequency output imped- LT1218/19 • F04a ance. The LT1219 requires a 0.1 F load capacitance for LT1218/LT1219 ...

Page 14

... positive supply. The LT1219 power supply rejection is about ten times greater than that of the LT1218 at 50kHz. Note the 5-to-1 scale change in the output voltage traces. The tolerance of the external compensation capacitor is not critical. The plots of Overshoot vs Load Current in the Typical Performance Characteristics section illustrate the effect of a capacitive load ...

Page 15

... S8 Package 8-Lead Plastic Small Outline (Narrow 0.150) (LTC DWG # 05-08-1610) 0.053 – 0.069 (1.346 – 1.752) 0.004 – 0.010 (0.101 – 0.254) 0.014 – 0.019 0.050 (0.355 – 0.483) (1.270) TYP LT1218/LT1219 Q1 TP0610L 20k 1218/19 • TA06 0.400* (10.160) MAX 8 ...

Page 16

... LT1218/LT1219 U TYPICAL APPLICATION 8-Channel, 12-Bit Data Acquisition System with Programmable Gain CH0 CH1 – CH2 LT1219L 4 13 CH3 D OUT – INPUTS 5 12 CH4 CH5 CH6 CLK 8 9 CH7 GND LTC1391 8-CHANNEL MUX ...

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