LT1880
SOT-23, Rail-to-Rail Output,
Picoamp Input Current
Precision Op Amp
FEATURES
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Offset Voltage: 150µV Max
Input Bias Current: 900pA Max
Offset Voltage Drift: 1.2µV/°C Max
Rail-to-Rail Output Swing
Operates with Single or Split Supplies
Open-Loop Voltage Gain: 1 Million Min
1.2mA Supply Current
Slew Rate: 0.4V/µs
Gain Bandwidth: 1.1MHz
Low Noise: 13nV/√Hz at 1kHz
Low Profile (1mm) ThinSOT
TM
Package
The LT
®
1880 op amp brings high accuracy input perfor-
mance and rail-to-rail output swing to the SOT-23 pack-
age. Input offset voltage is trimmed to less than 150µV and
the low drift maintains this accuracy over the operating
temperature range. Input bias current is an ultra low
900pA maximum.
The amplifier works on any total power supply voltage
between 2.7V and 36V (fully specified from 5V to
±15V).
Output voltage swings to within 55mV of the negative
supply and 250mV of the positive supply, which makes the
amplifier a good choice for low voltage single supply
operation.
Slew rates of 0.4V/µs with a supply current of 1.2mA give
superior response and settling time performance in a low
power precision amplifier.
The LT1880 is available in a 5-lead SOT-23 package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
Thermocouple Amplifiers
Bridge Transducer Conditioners
Instrumentation Amplifiers
Battery-Powered Systems
Photocurrent Amplifiers
TYPICAL APPLICATIO
C1
39pF
Precision Photodiode Amplifier
35
30
Distribution of Input Offset Voltage
PERCENT OF UNITS (%)
R1
100k, 1%
V
S+
V
λ
S1
25
20
15
10
5
–
LT1880
OUT
+
V
S–
V
OUT
= 0.1V/µA
1880 TA01
320µV OUTPUT OFFSET, WORST CASE OVER 0°C TO 70°C
60kHz BANDWIDTH
5.8µs RISE TIME, 10% TO 90%, 100mV OUTPUT STEP
52µV
RMS
OUTPUT NOISE, MEASURED ON A 100kHz BW
V
S
=
±1.5V
TO
±18V
S1: SIEMENS INFINEON BPW21 PHOTODIODE (~580pF)
0
–140 –100
U
100
60
–60 –20 20
INPUT OFFSET VOLTAGE (µV)
140
1880
TA01b
U
U
1
LT1880
ABSOLUTE
(Note 1)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
TOP VIEW
OUT 1
V
–
2
+IN 3
4 –IN
5 V
+
Supply Voltage (V
+
to V
–
) ....................................... 40V
Differential Input Voltage (Note 2) .........................
±10V
Input Voltage .................................................... V
+
to V
–
Input Current (Note 2) ........................................
±10mA
Output Short-Circuit Duration (Note 3) ............ Indefinite
Operating Temperature Range (Note 4) .. – 40°C to 85°C
Specified Temperature Range (Note 5) ... – 40°C to 85°C
Maximum Junction Temperature .......................... 150°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
LT1880CS5
LT1880IS5
S5 PART
MARKING
LTUM
LTVW
S5 PACKAGE
5-LEAD PLASTIC SOT-23
T
JMAX
= 150°C,
θ
JA
= 250°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 5V, 0V; V
CM
= 2.5V unless otherwise noted. (Note 5)
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
Input Offset Voltage Drift
(Note 6)
I
OS
Input Offset Current
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
I
B
Input Bias Current
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
Input Noise Voltage
e
n
i
n
R
IN
C
IN
V
CM
CMRR
PSRR
A
VOL
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
Input Capacitance
Input Voltage Range
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Minimum Operating Supply Voltage
Large Signal Voltage Gain
R
L
= 10k; 1V < V
OUT
< 4V
q
q
q
q
q
q
q
q
q
q
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
TYP
40
MAX
150
200
250
1.2
1.2
900
1200
1400
900
1200
1500
UNITS
µV
µV
µV
µV/°C
µV/°C
pA
pA
pA
pA
pA
pA
µV
P-P
nV/√Hz
pA/√Hz
MΩ
GΩ
pF
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
0.3
0.3
150
150
0.1Hz to 10Hz
f = 1kHz
f = 1kHz
Differential
Common Mode, V
CM
= 1V to 3.8V
(V
–
+ 1.0)
116
110
500
400
400
300
300
250
0.5
13
0.07
380
210
3.7
(V
+
– 1.2)
135
135
2.4
1600
800
400
20
35
130
55
65
200
2.7
1V < V
CM
< 3.8V
V
–
= 0V, V
CM
= 1.5V; 2.7V < V
+
< 32V
q
q
q
R
L
= 2k; 1V < V
OUT
< 4V
q
R
L
= 1k; 1V < V
OUT
< 4V
q
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
mV
mV
mV
V
OL
Output Voltage Swing Low
No Load
I
SINK
= 100µA
I
SINK
= 1mA
q
q
q
2
U
V
dB
dB
V
W
U
U
W W
W
LT1880
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 5V, 0V; V
CM
= 2.5V unless otherwise noted. (Note 5)
SYMBOL
V
OH
PARAMETER
Output Voltage Swing High
(Referred to V
+
)
Supply Current per Amplifier
CONDITIONS
V
+
= 5V; No Load
V
+
= 5V; I
SOURCE
= 100µA
V
+
= 5V; I
SOURCE
= 1mA
V
+
= 3V
q
q
q
q
ELECTRICAL CHARACTERISTICS
MIN
TYP
130
150
220
1.2
1.2
MAX
250
270
380
1.8
2.2
1.9
2.3
2
2.4
UNITS
mV
mV
mV
mA
mA
mA
mA
mA
mA
mA
mA
MHz
µs
kHz
%
%
V/µs
V/µs
V/µs
V/µs
I
S
V
+
= 5V
q
V
+
= 12V
q
1.35
q
q
I
SC
GBW
t
S
FPBW
THD
SR
+
SR
–
Short-Circuit Current
Gain-Bandwidth Product
Settling Time
Full Power Bandwidth (Note 7)
Total Harmonic Distortion and Noise
Slew Rate Positive
Slew Rate Negative
V
OUT
Short to GND
V
OUT
Short to V
+
f = 20kHz
0.01%, V
OUT
= 1.5V to 3.5V
A
V
= –1, R
L
= 2k
V
OUT
= 4V
P-P
V
O
= 2V
P-P
, A
V
= –1, f = 1kHz, R
f
= 1k, BW = 22kHz
V
O
= 2V
P-P
, A
V
= 1, f = 1kHz, R
L
= 10k, BW = 22kHz
A
V
= –1
10
10
0.8
18
20
1.1
10
32
0.002
0.0008
q
0.25
0.2
0.25
0.25
0.4
0.55
A
V
= –1
q
The
q
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
S
=
±15V,
V
CM
= 0V unless otherwise noted. (Note 5)
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
Input Offset Voltage Drift
(Note 6)
I
OS
Input Offset Current
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
I
B
Input Bias Current
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
Input Noise Voltage
e
n
i
n
R
IN
C
IN
V
CM
CMRR
+PSRR
–PSRR
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
Input Capacitance
Input Voltage Range
Common Mode Rejection Ratio
Positive Power Supply Rejection Ratio
Negative Power Supply Rejection Ratio
Minimum Operating Supply Voltage
–13.5V < V
CM
< 13.5V
V
–
= –15V, V
CM
= 0V; 1.5V < V
+
< 18V
V
+
= 15V, V
CM
= 0V; –1.5V < V
–
< –18V
q
q
q
q
q
q
q
q
q
q
q
q
q
CONDITIONS
MIN
TYP
40
MAX
150
200
250
1.2
1.2
900
1200
1400
900
1200
1500
UNITS
µV
µV
µV
µV/°C
µV/°C
pA
pA
pA
pA
pA
pA
µV
P-P
nV/√Hz
pA/√Hz
MΩ
GΩ
pF
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
0.3
0.3
150
150
0.1Hz to 10Hz
f = 1kHz
f = 1kHz
Differential
Common Mode, V
CM
= –13.5V to 13.5V
–13.5
118
110
110
0.5
13
0.07
380
190
3.7
13.5
135
135
135
±1.2
±1.35
V
dB
dB
dB
V
3
LT1880
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
=
±
15V; V
CM
= 0V unless otherwise noted. (Note 5)
SYMBOL
A
VOL
PARAMETER
Large Signal Voltage Gain
CONDITIONS
R
L
= 10k; –13.5V < V
OUT
< 13.5V
q
ELECTRICAL CHARACTERISTICS
MIN
1000
700
500
300
TYP
1600
1000
25
35
130
185
195
270
1.5
1.8
MAX
UNITS
V/mV
V/mV
V/mV
V/mV
R
L
= 2k; –13.5V < V
OUT
< 13.5V
q
V
OL
Output Voltage Swing Low
(Referred to V
EE
)
Output Voltage Swing High
(Referred to V
CC
)
Supply Current per Amplifier
No Load
I
SINK
= 100µA
I
SINK
= 1mA
No Load
I
SOURCE
= 100µA
I
SOURCE
= 1mA
q
q
q
q
q
q
q
65
75
200
350
370
450
2.3
2.8
mV
mV
mV
mV
mV
mV
mA
mA
mA
mA
mA
mA
kHz
MHz
%
%
V/µs
V/µs
V/µs
V/µs
V
OH
I
S
I
SC
Short-Circuit Current
V
OUT
Short to V
–
q
10
10
10
10
0.8
25
25
20
20
9
1.1
0.00029
0.00029
V
OUT
Short to V
+
q
FPBW
GBW
THD
SR
+
SR
–
Full Power Bandwidth (Note 7)
Gain Bandwidth Product
Total Harmonic Distortion and Noise
Slew Rate Positive
Slew Rate Negative
V
OUT
= 14V
P-P
f = 20kHz
V
O
= 25V
P-P
, A
V
= –1, f = 100kHz, R
f
= 10k, BW = 22kHz
V
O
= 25V
P-P
, A
V
= 1, f = 100kHz, R
L
= 10k, BW = 22kHz
A
V
= –1
q
0.25
0.2
0.25
0.2
0.4
0.55
A
V
= –1
q
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The inputs are protected by back-to-back diodes. If the differential
input voltage exceeds 10V, see Application Information, the input current
should be limited to less than 10mA.
Note 3:
A heat sink may be required to keep the junction temperature
below absolute maximum ratings.
Note 4:
The LT1880C and LT1880I are guaranteed functional over the
operating temperature range of –40°C to 85°C.
Note 5:
The LT1880C is guaranteed to meet specified performance from
0°C to 70°C and is designed, characterized and expected to meet specified
performance from –40°C to 85°C but is not tested or QA sampled at these
temperatures. The LT1880I is guaranteed to meet specified performance
from –40°C to 85°C.
Note 6:
This parameter is not 100% tested.
Note 7:
Full power bandwidth is calculated from the slew rate.
FPBW = SR/(2πV
P
)
4
LT1880
TYPICAL PERFOR A CE CHARACTERISTICS
Input Offset Voltage vs
Temperature
200
150
INPUT OFFSET VOLTAGE (µV)
TEMPCO: –55°C TO 125°C
10 REPRESENTATIVE UNITS
INPUT BIAS CURRENT (pA)
INPUT BIAS CURRENT (pA)
100
50
0
–50
–100
–150
–200
–55 –35 –15
45 65 85 105 125
TEMPERATURE (°C)
1880 G01
5
25
Input Bias Current vs Common
Mode Near V
EE
1000
V
S
=
±15V
200
150
OUTPUT VOLTAGE
SWING (V
+
)
INPUT BIAS CURRENT (pA)
500
INPUT BIAS CURRENT (pA)
0
I
B–
–500
–150
–200
–250
–300
–50
–25
I
B +
OUTPUT VOLTAGE
SWING (V
–
)
I
B+
–1000
–14.6
–13.8
–14.2
–13.4
COMMON MODE VOLTAGE (V)
Warm Up Drift
6
T
A
= 25°C
OFFSET VOLTAGE CHANGE (µV)
5
4
3
2
1
0
V
S
=
±2.5V
V
S
=
±15V
1000
CURRENT NOISE DENSITY (fA/√Hz)
VOLTAGE NOISE DENSITY (nV/√Hz)
CURRENT NOISE
100
VOLTAGE NOISE
10
NOISE VOLTAGE (0.2µV/DIV)
0
1
2
3
4
TIME AFTER POWER ON (MIN)
U W
T
A
= –40°C
T
A
= 25°C
T
A
= 85°C
Input Bias Current vs Common
Mode Voltage
1000
800
600
400
200
0
–200
–400
–600
–800
I
B +
T
A
= 25°C
T
A
= –40°C
T
A
= 85°C
1000
Input Bias Current vs Common
Mode Near V
CC
I
B–
V
S
=
±15V
500
I
B –
0
I
B+
–500
T
A
= –45°C
T
A
= 25°C
T
A
= 85°C
V
S
=
±15V
–1000
–15
–10
0
5
10
–5
COMMON MODE VOLTAGE (V)
15
1880 G02
–1000
13.0
13.8
14.2
13.4
COMMON MODE VOLTAGE (V)
14.6
1880 G02A
Input Bias Current vs
Temperature
V
S
=
±15V
Output Voltage Swing
vs Load Current
T
A
= –40°C
–0.5
–1.0
–1.5
1.5
1.0
0.5
T
A
= –40°C
–10 –8 –6 –4 –2 0 2
4 6
OUTPUT CURRENT (mA)
8
10
T
A
= 25°C
T
A
= 85°C
T
A
= 85°C
T
A
= 25°C
100
50
0
–50
–100
I
B –
–13.0
1880 G02B
25
50
0
TEMPERATURE (°C)
75
100
1880 G03
1880 G04
e
n
, i
n
vs Frequency
V
S
=
±15V
T
A
= 25°C
0.1 to 10Hz Noise
5
1880 G05
1
1
10
100
FREQUENCY (Hz)
1k
1880 G08
V
S
=
±15V
T
A
= 25°C
0
2
6
4
TIME (SEC)
8
10
1880 G09a
5
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