LTC1152
Rail-to-Rail Input
Rail-to-Rail Output
Zero-Drift Op Amp
FEATURES
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Input Common-Mode Range Includes Both Rails
Output Swings Rail to Rail
Output Will Drive 1k
Ω
Load
No External Components Required
Input Offset Voltage: 10µV Max
Input Offset Drift: 100nV/°C Max
Minimum CMRR: 115dB
Supply Current: 3.0mA Max
Shutdown Pin Drops Supply Current to 5µA Max
Output Configurable to Drive Any Capacitive Load
Operates from 2.7V to 14V Total Supply Voltage
The LTC
®
1152 is a high performance, low power zero-drift
op amp featuring an input stage that common modes to
both power supply rails and an output stage that provides
rail-to-rail swing, even into heavy loads. The wide input
common-mode range is achieved with a high frequency
on-board charge pump. This technique eliminates the
crossover distortion and limited CMRR imposed by com-
peting technologies. The LTC1152 is a C-Load
TM
of amp,
enabling it to drive any capacitive load.
The LTC1152 shares the excellent DC performance specs
of LTC’s other zero-drift amplifiers. Typical offset voltage
is 1µV and typical offset drift is 10nV/°C. CMRR and PSRR
are 130dB and 120dB and open-loop gain is 130dB. Input
noise voltage is 2µV
P-P
from 0.1Hz to 10Hz. Gain-band-
width product is 0.7MHz and slew rate is 0.5V/µs, all with
supply current of 3.0mA max over temperature. The
LTC1152 also includes a shutdown feature which drops
supply current to 1µA and puts the output stage in a high
impedance state.
The LTC1152 is available in 8-pin PDIP and 8-pin SO
packages and uses the standard op amp pinout, allowing
it to be a plug-in replacement for many standard op amps.
, LTC and LT are registered trademarks of Linear Technology Corporation.
C-Load is trademark of Linear Technology Corporation.
APPLICATI
s
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s
S
Rail-to-Rail Amplifiers and Buffers
High Resolution Data Acquisition Systems
Supply Current Sensing in Either Rail
Low Supply Voltage Transducer Amplifiers
High Accuracy Instrumentation
Single Negative Supply Operation
TYPICAL APPLICATI
Input and Output Waveforms
Rail-to-Rail Buffer
5V
5V
IN
+
3
–
2
7
6
OUT
V
OUT
2V/DIV
0V
5V
V
IN
2V/DIV
1152 TA01
LTC1152
4
0V
1152 TA02
U
UO
UO
1
LTC1152
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SHDN 1
–IN 2
+IN 3
V
–
4
8
7
6
5
CP
V
+
OUT
COMP
Total Supply Voltage (V
+
to V
–
) ............................. 14V
Input Voltage ............................ V
+
+ 0.3V to V
–
– 0.3V
Output Short-Circuit Duration (Pin 6) ............. Indefinite
Operating Temperature Range
LTC1152C............................................... 0°C to 70°C
LTC1152I.......................................... – 40°C to 85°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
LTC1152CN8
LTC1152CS8
LTC1152IN8
LTC1152IS8
S8 PART MARKING
1152
1152I
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 110°C,
θ
JA
= 130°C/ W (N8)
T
JMAX
= 110°C,
θ
JA
= 200°C/ W (S8)
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
OS
Input Offset Voltage
∆V
OS
I
B
I
OS
e
n
i
n
CMRR
PSRR
A
VOL
V
OUT
Average Input Offset Drift
Long-Term Offset Drift
Input Bias Current
Input Offset Current
Input Noise Voltage (Note 3)
Input Noise Current
Common-Mode Rejection Ratio
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage Swing (Note 4)
V
S
= 5V, T
A
= operating temperature range, unless otherwise specified.
MIN
q
CONDITIONS
T
A
= 25°C (Note 1)
(Note 1)
T
A
= 25°C (Note 2)
q
TYP
±1
±10
±50
±10
±20
MAX
±10
±100
±100
±1000
±200
±500
3
1
UNITS
µV
nV/°C
nV/√Mo
pA
pA
pA
pA
µV
P-P
µV
P-P
fA/√Hz
dB
dB
dB
dB
V
V
V
V/µs
MHz
T
A
= 25°C (Note 2)
q
R
S
= 100Ω, 0.1Hz to 10Hz
R
S
= 100Ω, 0.1Hz to 1Hz
f = 10Hz
V
CM
= 0V to 5V
V
S
= 3V to 12V
q
q
2
0.5
0.6
115
110
105
110
4.0
±2.0
130
120
130
4.4
2.2
±2.49
0.5
0.7
q
q
q
R
L
= 10k, V
OUT
= 0.5V to 4.5V
R
L
= 1k, V
S
= Single 5V
R
L
= 1k, V
S
=
±2.5V
R
L
= 100k, V
S
=
±2.5V
R
L
= 10k, C
L
= 50pF, V
S
=
±2.5V
R
L
= 10k, C
L
= 50pF, V
S
=
±2.5V
No Load
Shutdown = 0V
Shutdown = 0V
I
CP
= 0
q
q
q
SR
GBW
I
S
I
OSD
V
CP
V
IL
V
IH
I
IN
f
CP
f
SMPL
Slew Rate
Gain-Bandwidth Product
Supply Current
Output Leakage Current
Charge Pump Output Voltage
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Shutdown Pin Input Current
Internal Charge Pump Frequency
Internal Sampling Frequency
2.2
1
±10
7.3
2.5
4
3.0
5
±100
V
SHDN
= 0V
T
A
= 25°C
T
A
= 25°C
q
–1
4.7
2.3
–5
2
U
mA
µA
nA
V
V
V
µA
MHz
kHz
W
U
U
W W
W
LTC1152
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
V
OS
Input Offset Voltage
∆V
OS
I
B
I
OS
e
n
i
n
CMRR
A
VOL
V
OUT
SR
GBW
I
S
I
OSD
V
CP
V
IL
V
IH
I
IN
f
CP
f
SMPL
Average Input Offset Drift
Input Bias Current
Input Offset Current
Input Noise Voltage (Note 3)
Input Noise Current
Common-Mode Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Voltage Swing (Note 4)
Slew Rate
Gain-Bandwidth Product
Supply Current
Output Leakage Current
Charge Pump Output Voltage
Shutdown Pin Input Low Voltage
Shutdown Pin Input High Voltage
Shutdown Pin Input Current
Internal Charge Pump Frequency
Internal Sampling Frequency
V
S
= 3V, T
A
= operating temperature range, unless otherwise specified.
MIN
q
q
CONDITIONS
T
A
= 25°C (Note 1)
(Note 1)
T
A
= 25°C (Note 2)
T
A
= 25°C (Note 2)
q
TYP
±1
±10
±5
±10
2
0.75
0.6
MAX
±10
±100
±100
±1000
±200
±500
UNITS
µV
nV/°C
pA
pA
pA
pA
µV
P-P
µV
P-P
fA/√Hz
dB
dB
V
V
V/µs
MHz
R
S
= 100Ω, 0.1Hz to 10Hz
R
S
= 100Ω, 0.1Hz to 1Hz
f = 10Hz
V
CM
= 0V to 3V
R
L
= 10k, V
OUT
= 0.5V to 2.5V
R
L
= 1k, V
S
= Single 3V
R
L
= 100k, V
S
=
±1.5V
R
L
= 10k, C
L
= 50pF, V
S
=
±1.5V
R
L
= 10k, C
L
= 50pF, V
S
=
±1.5V
No Load
Shutdown = 0V
Shutdown = 0V
I
CP
= 0
q
q
q
q
q
q
130
106
2.0
130
2.5
±1.48
0.4
0.5
1.8
1
±10
4.5
1.2
2.3
2.5
5
mA
µA
nA
V
V
V
µA
MHz
kHz
V
SHDN
= 0V
T
A
= 25°C
T
A
= 25°C
–1
4.2
2.1
The
q
denotes specifications which apply over the full operating
temperature range.
Note 1:
These parameters are guaranteed by design. Thermocouple effects
preclude measurement of these voltage levels during automated testing.
Note 2:
At T
≤
0°C these parameters are guaranteed by design and not
tested.
Note 3:
0.1Hz to 10Hz noise is specified DC coupled in a 10-sec window;
0.1Hz to 1Hz noise is specified in a 100-sec window with an RC highpass
filter at 0.1Hz. Contact LTC factory for sample tested or 100% tested noise
parts.
Note 4:
All output swing measurements are taken with the load resistor
connected from output to ground. For single supply tests, only the positive
swing is specified (negative swing will be 0V due to the pull-down effect of
the load resistor). For dual supply operation, both positive and negative
swing are specified.
3
LTC1152
TYPICAL PERFORMANCE CHARACTERISTICS
Common-Mode Range vs
Supply Voltage
8
COMMON-MODE RANGE LIMIT (V)
SUPPLY CURRENT (mA)
4
2
0
–2
–4
–6
–8
1
6
3
4
5
2
POWER SUPPLY VOLTAGE (±V)
7
1152 G01
2.5
POWER SUPPLY CURRENT (mA)
6
Output Swing vs Load Resistance
6
T
A
= 25°C
5
OUTPUT SWING (±V)
OUTPUT SHORT-CIRCUIT CURRENT (mA)
V
S
= SINGLE 5V
30
SINK
20
OPEN-LOOP OUTPUT RESISTANCE (Ω)
4
3
2
1
0
V
S
= SINGLE 3V
V
S
=
±2.5V
V
S
=
±1.5V
0.2 0.5
1
2
5 10 20 50 100 200
LOAD RESISTANCE (kΩ)
1152 G04
Charge Pump Voltage vs
Supply Voltage
3
CHARGE PUMP VOLTAGE, V
CP
– V
+
(V)
CHARGE PUMP VOLTAGE, V
CP
– V
+
(V)
T
A
= 25°C
2
2
INPUT BIAS CURRENT (±pA)
1
0
2
4
12
6
8
10
TOTAL SUPPLY VOLTAGE (V)
4
U W
14
1152 G07
Supply Current vs Supply Voltage
3.0
T
A
= 25°C
1.9
1.8
1.7
1.6
1.5
2.0
Supply Current vs Temperature
V
S
= 5V
2.0
1.5
1.0
0
2
6
8
10 12
4
TOTAL SUPPLY VOLTAGE (V)
14
1152 G02
1.4
–50
–25
0
25
50
TEMPERATURE (°C)
75
100
1152 G03
Output Short-Circuit Current vs
Supply Voltage
40
T
A
= 25°C
SOURCE
300
Open-Loop Output Resistance vs
Supply Voltage
T
A
= 25°C
250
200
10
150
0
2
4
6
8
10
12
TOTAL SUPPLY VOLTAGE (V)
14
1152 G05
100
2
4
6
8
10
12
TOTAL SUPPLY VOLTAGE (V)
14
1152 G06
Charge Pump Voltage vs
Load Current
3
T
A
= 25°C
V
S
= 5V
1000
Input Bias Current vs Temperature
V
S
= 5V
100
1
0
0
20
40 60 80 100 120 140 160
LOAD CURRENT (µA)
1152 G08
10
–50
–25
0
25
50
TEMPERATURE (°C)
75
100
1152 G09
LTC1152
TYPICAL PERFORMANCE CHARACTERISTICS
Gain and Phase Shift vs
Frequency
70
60
50
VOLTAGE GAIN (dB)
COMMON-MODE REJECTION RATIO (dB)
POWER SUPPLY REJECTION RATIO (dB)
PHASE
T
A
= 25°C
V
S
=
±2.5V
PIN 5 = NC
40
30
20
10
0
–10
–20
1k
10k
GAIN
100k
1M
FREQUENCY (Hz)
Gain and Phase Shift vs
Frequency
70
60
50
VOLTAGE GAIN (dB)
PHASE
VOLTAGE NOISE (nV/√Hz)
T
A
= 25°C
V
S
=
±2.5V
C
COMP
= 1000pF
40
30
20
10
0
–10
–20
1k
10k
100k
1M
FREQUENCY (Hz)
GAIN
(µV)
Gain and Phase Shift vs
Frequency
60
50
40
VOLTAGE GAIN (dB)
30
20
10
0
–10
–20
–30
–40
0.01
0.1
1
FREQUENCY (kHz)
10
1152 G12
T
A
= 25°C
V
S
=
±2.5V
C
COMP
= 0.1µF
PHASE
GAIN
U W
1152 G10
1152 G11
Common-Mode Rejection Ratio vs
Frequency
120
100
80
PHASE SHIFT (DEG)
PHASE SHIFT (DEG)
Power Supply Rejection Ratio vs
Frequency
80
70
60
50
40
30
20
10
0
–10
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
1152 G14
110
100
90
80
70
60
50
40
30
0.1
1
10
100
FREQUENCY (kHz)
1000
1152 G13
T
A
= 25°C
V
S
=
±2.5V
T
A
= 25°C
60
40
20
0
–PSRR
+PSRR
10M
Voltage Noise vs Frequency
120
100
125
150
0.1Hz to 10Hz Input Noise
2
80
60
40
20
0
–20
–40
1
100
75
50
0
–1
25
–60
10M
0
1
10
100
1k
FREQUENCY (Hz)
10k
1152 G15
–2
0
2
6
4
TIME (SEC)
8
10
1152 G18
Small-Signal Transient Response
180
160
140
120
100
80
60
40
20
0
–20
PHASE SHIFT (DEG)
V
S
=
±2.5V
A
V
= 1
1152 G16
Large-Signal Transient Response
V
S
=
±2.5V
A
V
= 1
1152 G17
5
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