LT1218/LT1219
Precision Rail-to-Rail Input
and Output Op Amps
FEATURES
s
s
s
s
s
s
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 90µV 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
0.1µF 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.
s
s
s
s
s
Rail-to-Rail Input and Output
90
µ
V V
OS(MAX)
for V
CM
= V
–
to V
+
High Common Mode Rejection Ratio: 97dB Min
C-Load
TM
Stable Version (LT1219)
High A
VOL
: 500V/mV Minimum Driving 10kΩ Load
Wide Supply Range:
2V to
±15V
(LT1218/LT1219)
2V to
±5V
(LT1218L/LT1219L)
Shutdown Mode: I
S
< 30µA
Low Supply Current: 420µA Max
Low Input Bias Current: 18nA Typical
300kHz Gain-Bandwidth Product (LT1218)
Slew Rate: 0.10V/µs (LT1218)
APPLICATIONS
s
s
s
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.
TYPICAL APPLICATION
MUX Amplifier
5V
V
IN1
Voltage Follower Input to Output Error
10
V
S
= 5V
A
V
= 1
NO LOAD
V
OUT
+
LT1218L
–
SHDN
ERROR
(mV)
1.0
5V
V
IN2
0.1
+
LT1218L
–
INPUT
SELECT
74HCO4
SHDN
MAXIMUM IN
TO OUT ERROR
= 110µV FOR
0.05V
≤
V
IN
≤
4.8V
R
L
= 10k
0.01
0
0.05
1
2
3
4
4.95
5
INPUT VOLTAGE (V)
LT1218/19 • TA02
1218/19 • TA01
U
U
U
MAX ERROR = 110µV
0.05V
≤
V
IN
≤
4.8V
1
LT1218/LT1219
ABSOLUTE
MAXIMUM
RATINGS
Supply Voltage
LT1218/LT1219 .................................................
±18V
LT1218L/LT1219L ...............................................
±8V
Input Current ......................................................
±15mA
Output Short-Circuit Duration (Note 1) ......... Continuous
Operating Temperature Range ................ – 40°C to 85°C
Specified Temperature Range (Note 3) ... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Junction Temperature........................................... 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
ORDER PART
NUMBER
TOP VIEW
V
OS
TRIM 1
–IN 2
+IN 3
V
–
4
N8 PACKAGE
8-LEAD PDIP
8
7
6
5
V
OS
TRIM
V
+
OUT
SHDN
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 130°C/ W (N8)
T
JMAX
= 150°C,
θ
JA
= 190°C/ W (S8)
LT1218CN8
LT1218CS8
LT1218LCN8
LT1218LCS8
LT1219CN8
LT1219CS8
LT1219LCN8
LT1219LCS8
S8 PART MARKING
1218 1219
1218L 1219L
Consult factory for Industrial and Military grades.
T
A
= 25°C, V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
= half supply, V
SHDN
= V
+
, unless otherwise noted.
SYMBOL
V
OS
∆V
OS
I
B
∆I
B
I
OS
∆I
OS
e
n
i
n
A
VOL
CMRR
PSRR
V
OL
PARAMETER
Input Offset Voltage
Input Offset Voltage Shift
Input Bias Current
Input Bias Current Shift
Input Offset Current
Input Offset Current Shift
Input Noise Voltage Density
Input Noise Current Density
Large-Signal Voltage Gain
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing LOW
CONDITIONS
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
f = 1kHz
f = 1kHz
V
S
= 5V, V
O
= 50mV to 4.8V, R
L
= 10k
V
S
= 3V, V
O
= 50mV to 2.8V, R
L
= 10k
V
S
= 5V, V
CM
= V
–
to V
+
V
S
= 3V, V
CM
= V
–
to V
+
V
S
= 2.3V to 12V, V
CM
= 0V, V
O
= 0.5V
No Load
I
SINK
= 0.5mA
I
SINK
= 2.5mA
No Load
I
SOURCE
= 0.5mA
I
SOURCE
= 2.5mA
V
S
= 5V
V
S
= 3V
V
S
= 5V
V
S
= 3V
V
S
= 5V, V
SHDN
= 0V
V
S
= 3V, V
SHDN
= 0V
MIN
TYP
25
25
15
30
– 18
50
5
2
5
33
0.09
1000
750
110
106
100
4
45
120
+
– 0.003
V
V
+
– 0.065
V
+
– 0.210
10
7
370
370
9
6
MAX
90
90
70
70
140
18
18
18
UNITS
µV
µV
µV
nA
nA
nA
nA
nA
nA
nV/√Hz
pA/√Hz
V/mV
V/mV
dB
dB
dB
mV
mV
mV
V
V
V
mA
mA
µA
µA
µA
µA
ELECTRICAL CHARACTERISTICS
– 70
250
200
97
92
90
12
90
240
V
OH
Output Voltage Swing HIGH
I
SC
I
S
Short-Circuit Current
Supply Current
Positive Supply Current, SHDN
V
+
– 0.012
V
+
– 0.130
V
+
– 0.400
5
4
420
410
30
20
2
U
W
U
U
W W
W
LT1218/LT1219
ELECTRICAL CHARACTERISTICS
T
A
= 25°C, V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
= half supply, V
SHDN
= V
+
, unless otherwise noted.
SYMBOL
SR
GBW
PARAMETER
Slew Rate (LT1218/LT1218L)
(LT1219/LT1219L)
Gain Bandwidth Product
(LT1218/LT1218L)
(LT1219/LT1219L)
CONDITIONS
A
V
= – 1
A
V
= – 1
A
V
= 1000
A
V
= 1000
MIN
TYP
0.10
0.05
0.30
0.15
MAX
UNITS
V/µs
V/µs
MHz
MHz
0°C
≤
T
A
≤
70°C, V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
= half supply, V
SHDN
= V
+
, unless otherwise noted.
SYMBOL
V
OS
V
OS
TC
∆V
OS
I
B
∆I
B
I
OS
∆I
OS
A
VOL
CMRR
PSRR
V
OL
PARAMETER
Input Offset Voltage
Input Offset Drift
Input Offset Voltage Shift
Input Bias Current
Input Bias Current Shift
Input Offset Current
Input Offset Current Shift
Large-Signal Voltage Gain
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing LOW
CONDITIONS
V
CM
= V
+
V
CM
= V
–
(Note 2)
V
CM
= V
–
to V
+
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
V
S
= 5V, V
O
= 50mV to 4.8V, R
L
= 10k
V
S
= 3V, V
O
= 50mV to 2.8V, R
L
= 10k
V
S
= 5V, V
CM
= V
–
to V
+
V
S
= 3V, V
CM
= V
–
to V
+
V
S
= 2.3V to 12V, V
CM
= 0V, V
O
= 0.5V
No Load
I
SINK
= 0.5mA
I
SINK
= 2.5mA
No Load
I
SOURCE
= 0.5mA
I
SOURCE
= 2.5mA
V
S
= 5V
V
S
= 3V
V
S
= 5V
V
S
= 3V
V
S
= 5V, V
SHDN
= 0V
V
S
= 3V, V
SHDN
= 0V
MIN
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
– 75
250
150
96
91
88
V
OH
Output Voltage Swing HIGH
I
SC
I
S
Short-Circuit Current
Supply Current
Positive Supply Current, SHDN
V
+
– 0.014
V
+
– 0.150
V
+
– 0.480
4
3
TYP
75
75
1
25
30
– 18
50
5
3
5
1000
750
104
106
100
4
45
130
+
– 0.004
V
V
+
– 0.075
V
+
– 0.240
7
6
370
370
9
6
MAX
200
200
3
80
75
150
25
25
25
14
100
290
485
475
36
26
UNITS
µV
µV
µV/°C
µV
nA
nA
nA
nA
nA
nA
V/mV
V/mV
dB
dB
dB
mV
mV
mV
V
V
V
mA
mA
µA
µA
µA
µA
– 40°C
≤
T
A
≤
85°C, V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
= half supply, V
SHDN
= V
+
, unless otherwise noted. (Note 3)
SYMBOL
V
OS
V
OS
TC
∆V
OS
I
B
∆I
B
I
OS
∆I
OS
PARAMETER
Input Offset Voltage
Input Offset Drift
Input Offset Voltage Shift
Input Bias Current
Input Bias Current Shift
Input Offset Current
Input Offset Current Shift
CONDITIONS
V
CM
= V
+
– 0.15
V
CM
= V
–
+ 0.15
(Note 2)
V
CM
= V
+
– 0.15 to V
–
+ 0.15
V
CM
= V
+
– 0.15
V
CM
= V
–
+ 0.15
V
CM
= V
+
– 0.15 to V
–
+ 0.15
V
CM
= V
+
– 0.15
V
CM
= V
–
+ 0.15
V
CM
= V
+
– 0.15 to V
–
+ 0.15
MIN
q
q
q
q
q
q
q
q
q
q
TYP
1
30
– 80
MAX
400
400
4
105
80
160
40
40
40
UNITS
µV
µV
µV/°C
µV
nA
nA
nA
nA
nA
nA
3
LT1218/LT1219
ELECTRICAL CHARACTERISTICS
– 40°C
≤
T
A
≤
85°C, V
S
= 5V, 0V; V
S
= 3V, 0V; V
CM
= V
O
= half supply, V
SHDN
= V
+
, unless otherwise noted. (Note 3)
SYMBOL
A
VOL
CMRR
PSRR
V
OL
PARAMETER
Large-Signal Voltage Gain
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Output Voltage Swing LOW
CONDITIONS
V
S
= 5V, V
O
= 50mV to 4.8V, R
L
= 10k
V
S
= 3V, V
O
= 50mV to 2.8V, R
L
= 10k
V
S
= 5V, V
CM
= V
+
– 0.15 to V
–
+ 0.15
V
S
= 3V, V
CM
= V
+
– 0.15 to V
–
+ 0.15
V
S
= 2.3V to 12V, V
CM
= 0V, V
O
= 0.5V
No Load
I
SINK
= 0.5mA
I
SINK
= 2.5mA
No Load
I
SOURCE
= 0.5mA
I
SOURCE
= 2.5mA
V
S
= 5V
V
S
= 3V
V
S
= 5V
V
S
= 3V
V
S
= 5V, V
SHDN
= 0V
V
S
= 3V, V
SHDN
= 0V
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
MIN
150
100
93
88
86
V
OH
Output Voltage Swing HIGH
I
SC
I
S
Short-Circuit Current
Supply Current
Positive Supply Current, SHDN
V
+
– 0.015
V
+
– 0.160
V
+
– 0.500
4
3
TYP
500
500
102
100
100
5
50
130
V
+
– 0.004
V
+
– 0.070
V
+
– 0.250
7
7
410
400
15
13
MAX
15
105
300
505
495
50
40
UNITS
V/mV
V/mV
dB
dB
dB
mV
mV
mV
mV
mV
mV
mA
mA
µA
µA
µA
µA
LT1218L/LT1219L only; T
A
= 25°C, V
S
=
±5V,
V
CM
= 0V, V
O
= 0V, V
SHDN
= 5V, unless otherwise noted.
SYMBOL
V
OS
∆V
OS
I
B
∆I
B
I
OS
∆I
OS
A
VOL
CMRR
V
OL
PARAMETER
Input Offset Voltage
Input Offset Voltage Shift
Input Bias Current
Input Bias Current Shift
Input Offset Current
Input Offset Current Shift
Large-Signal Voltage Gain
Common Mode Rejection Ratio
Output Voltage Swing LOW
CONDITIONS
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
V
O
= – 4.7V to 4.7V, R
L
= 10k
V
O
= – 4.5V to 4.5V, R
L
= 2k
V
CM
= V
–
to V
+
No Load
I
SINK
= 0.5mA
I
SINK
= 5mA
No Load
I
SOURCE
= 0.5mA
I
SOURCE
= 5mA
MIN
TYP
35
35
20
30
– 18
50
5
2
5
2800
1300
114
–
+ 0.004
V
V
–
+ 0.045
V
–
+ 0.180
V
+
– 0.003
V
+
– 0.065
V
+
– 0.350
12
400
10
0.10
0.05
0.30
0.15
MAX
140
140
70
70
140
18
18
18
UNITS
µV
µV
µV
nA
nA
nA
nA
nA
nA
V/mV
V/mV
dB
V
V
V
V
V
V
mA
µA
µA
V/µs
V/µs
MHz
MHz
– 70
500
300
103
V
–
+ 0.012
V
–
+ 0.090
V
–
+ 0.525
V
OH
Output Voltage Swing HIGH
I
SC
I
S
SR
GBW
Short-Circuit Current
Supply Current
Positive Supply Current, SHDN
Slew Rate (LT1218/LT1218L)
(LT1219/LT1219L)
Gain-Bandwidth Product
(LT1218/LT1218L)
(LT1219/LT1219L)
V
+
– 0.012
V
+
– 0.130
V
+
– 0.800
6
V
SHDN
= 0V
A
V
= – 1, R
L
= Open, V
O
=
±3.5V
A
V
= – 1, R
L
= Open, V
O
=
±3.5V
A
V
= 1000
A
V
= 1000
430
40
0.06
0.03
0.2
0.1
4
LT1218/LT1219
ELECTRICAL CHARACTERISTICS
LT1218L/LT1219L only; 0°C
≤
T
A
≤
70°C, V
S
=
±5V,
V
CM
= 0V, V
O
= 0V, V
SHDN
= 5V, unless otherwise noted.
SYMBOL
V
OS
∆V
OS
I
B
∆I
B
I
OS
∆I
OS
A
VOL
CMRR
V
OL
PARAMETER
Input Offset Voltage
Input Offset Voltage Shift
Input Bias Current
Input Bias Current
Input Offset Current
Input Offset Current Shift
Large-Signal Voltage Gain
Common Mode Rejection Ratio
Output Voltage Swing LOW
CONDITIONS
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
V
CM
= V
+
V
CM
= V
–
V
CM
= V
–
to V
+
V
O
= – 4.7V to 4.7V, R
L
= 10k
V
O
= – 4.5V to 4.5V, R
L
= 2k
V
CM
= V
–
to V
+
No Load
I
SINK
= 0.5mA
I
SINK
= 5mA
No Load
I
SOURCE
= 0.5mA
I
SOURCE
= 5mA
MIN
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
– 75
375
275
100
V
OH
Output Voltage Swing HIGH
I
SC
I
S
Short-Circuit Current
Supply Current
Positive Supply Current, SHDN
V
+
– 0.014
V
+
– 0.150
V
+
– 0.920
5
V
SHDN
= 0V
q
TYP
100
100
30
30
– 18
50
5
3
5
2800
1300
110
–
+ 0.004
V
V
–
+ 0.045
V
–
+ 0.200
V
+
– 0.004
V
+
– 0.075
V
+
– 0.450
10
400
11
MAX
250
250
90
75
150
25
25
20
V
–
+ 0.014
V
–
+ 0.100
V
–
+ 0.580
495
54
UNITS
µV
µV
µV
nA
nA
nA
nA
nA
nA
V/mV
V/mV
dB
V
V
V
V
V
V
mA
µA
µA
LT1218L, LT1219L only; – 40°C
≤
T
A
≤
85°C, V
S
=
±5V;
V
CM
= 0V, V
O
= 0V, V
SHDN
= 5V, unless otherwise noted. (Note 3)
SYMBOL
V
OS
∆V
OS
I
B
∆I
B
I
OS
∆I
OS
A
VOL
CMRR
V
OL
PARAMETER
Input Offset Voltage
Input Offset Voltage Shift
Input Bias Current
Input Bias Current
Input Offset Current Shift
Input Offset Current Shift
Large-Signal Voltage Gain
Common Mode Rejection Ratio
Output Voltage Swing LOW
CONDITIONS
V
CM
= V
+
– 0.15
V
CM
= V
–
+ 0.15
V
CM
= V
+
– 0.15 to V
–
+ 0.15
V
CM
= V
+
– 0.15
V
CM
= V
–
+ 0.15
V
CM
= V
+
– 0.15 to V
–
+ 0.15
V
CM
= V
+
– 0.15
V
CM
= V
–
+ 0.15
V
CM
= V
+
– 0.15 to V
–
+ 0.15
V
O
= – 4.7V to 4.7V, R
L
= 10k
V
O
= – 4.5V to 4.5V, R
L
= 2k
V
CM
= V
+
– 0.15 to V
–
+ 0.15
No Load
I
SINK
= 0.5mA
I
SINK
= 2.5mA
No Load
I
SOURCE
= 0.5mA
I
SOURCE
= 2.5mA
MIN
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
q
TYP
125
125
35
MAX
500
500
120
80
160
40
40
40
– 80
300
200
98
V
OH
Output Voltage Swing HIGH
I
SC
I
S
Short-Circuit Current
Supply Current
Positive Supply Current, SHDN
V
+
– 0.015
V
+
– 0.160
V
+
– 1.000
5
V
SHDN
= 0V
q
2000
600
109
–
+ 0.005
V
V
–
+ 0.050
V
–
+ 0.200
V
+
– 0.004
V
+
– 0.070
V
+
– 0.400
10
420
18
V
–
+ 0.015
V
–
+ 0.105
V
–
+ 0.620
525
60
UNITS
µV
µV
µV
nA
nA
nA
nA
nA
nA
V/mV
V/mV
dB
V
V
V
V
V
V
mA
µA
µA
5
编程基础
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