LT6010
1
sn6010 6010fs
APPLICATIO S
U
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
U
■
Thermocouple Amplifiers
■
Precision Photo Diode Amplifiers
■
Instrumentation Amplifiers
■
Battery-Powered Precision Systems
■
35µV Maximum Offset Voltage
■
110pA Maximum Input Bias Current
■
135µA Supply Current
■
Rail-to-Rail Output Swing
■
12µA Supply Current in Shutdown
■
120dB Minimum Voltage Gain (V
S
= ±15V)
■
0.8µV/°C Maximum V
OS
Drift
■
14nV/√Hz Input Noise Voltage
■
2.7V to ±18V Supply Voltage Operation
■
Operating Temperature Range: –40°C to 85°C
■
Space Saving 3mm × 3mm DFN Package
135µA, 14nV/√Hz,
Rail-to-Rail Output Precision
Op Amp with Shutdown
, LTC and LT are registered trademarks of Linear Technology Corporation.
The LT
®
6010 op amp combines low noise and high preci-
sion input performance with low power consumption and
rail-to-rail output swing.
Input offset voltage is trimmed to less than 35µV. The low
drift and excellent long-term stability guarantee a high
accuracy over temperature and over time. The 110pA
maximum input bias current and 120dB minimum voltage
gain further maintain this precision over operating
conditions.
The LT6010 works on any power supply voltage from 2.7V
to 36V, and draws only 135µA of supply current on a 5V
supply. A power saving shutdown feature reduces supply
current to 12µA. The output voltage swings to within
40mV of either supply rail, making the amplifier a good
choice for low voltage single supply operation.
The LT6010 is fully specified at 5V and ±15V supplies and
from –40°C to 85°C. The device is available in SO-8 and
space-saving 3mm × 3mm DFN packages. This op amp
is also available in dual (LT6011) and quad (LT6012)
packages.
Single Supply Current Source for Platinum RTD
–
+
VS
VS
R1
12.4k
0.1%
R2
100Ω
1%
C1
0.1µF
1k
AT 0°C
RTD*
R5
1k, 5%
R4
1k, 5%
VOUT = 100mV AT 0°C + 385µV/°C
–50°C TO 600°C
+
–
6010 TA01a
VS = 2.7V TO 20V
ICC ≈ 320µA
*OMEGA F3141 1kΩ, 0.1% PLATINUM RTD (800) 826-6342
LT6010
2
12
64
7
6
4
3
1µF
LT1790-1.25
Distribution of Offset Voltage Drift
DISTRIBUTION (µV/°C)
–0.8 –0.6 –0.4 –0.2
PERCENTAGE OF UNITS (%)
6010 TA01b
00.4 0.6 0.80.2
20
18
16
14
12
10
8
6
4
2
0
V
S
= ±2.5V SO-8 PACKAGES
LT6010
2
sn6010 6010fs
Total Supply Voltage (V
+
to V
–
) .............................. 40V
Differential Input Voltage (Note 2) .......................... 10V
Input Voltage, Shutdown 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
ORDER PART
NUMBER
DD PART MARKING*
T
JMAX
= 125°C, θ
JA
= 160°C/W
UNDERSIDE METAL INTERNALLY CONNECTED TO V
–
(PCB CONNECTION OPTIONAL)
LT6010CDD
LT6010IDD
LT6010ACDD
LT6010AIDD
(Note 1)
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
*Temperature grades are identified by a label on the shipping container.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TOP VIEW
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
5
6
7
8
4
3
2
1NULL
–IN
+IN
V
–
NULL
V
+
OUT
SHDN
+
–
ORDER PART
NUMBER
S8 PART MARKING
LT6010CS8
LT6010IS8
LT6010ACS8
LT6010AIS8
6010
6010I
6010A
6010AI
T
JMAX
= 150°C, θ
JA
= 190°C/W
1
2
3
4
8
7
6
5
TOP VIEW
NULL
V
+
OUT
SHDN
NULL
–IN
+IN
V
–
S8 PACKAGE
8-LEAD PLASTIC SO
+
–
Maximum Junction Temperature
DD Package ..................................................... 125°C
SO-8 Package .................................................. 150°C
Storage Temperature Range
DD Package ..................................... –65°C to 125°C
SO-8 Package .................................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
LADU
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; SHDN = 0.2V, unless otherwise
specified. (Note 5)
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Note 7) LT6010AS8 10 35 µV
T
A
= 0°C to 70°C●60 µV
T
A
= –40°C to 85°C●75 µV
LT6010S8 20 55 µV
T
A
= 0°C to 70°C●85 µV
T
A
= –40°C to 85°C●110 µV
LT6010ADD 20 60 µV
T
A
= 0°C to 70°C●85 µV
T
A
= –40°C to 85°C●100 µV
LT6010DD 30 80 µV
T
A
= 0°C to 70°C●110 µV
T
A
= –40°C to 85°C●135 µV
∆V
OS
/∆T Input Offset Voltage Drift (Note 6) LT6010AS8, LT6010S8 ●0.2 0.8 µV/°C
LT6010ADD,LT6010DD ●0.2 1.3 µV/°C
LT6010
3
sn6010 6010fs
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; SHDN = 0.2V, unless otherwise
specified. (Note 5)
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
OS
Input Offset Current (Note 7) LT6010AS8 20 110 pA
T
A
= 0°C to 70°C●150 pA
T
A
= –40°C to 85°C●200 pA
LT6010S8 40 200 pA
T
A
= 0°C to 70°C●300 pA
T
A
= –40°C to 85°C●400 pA
LT6010ADD 20 200 pA
T
A
= 0°C to 70°C●300 pA
T
A
= –40°C to 85°C●400 pA
LT6010DD 40 300 pA
T
A
= 0°C to 70°C●400 pA
T
A
= –40°C to 85°C●500 pA
I
B
Input Bias Current (Note 7) LT6010AS8 20 ±110 pA
T
A
= 0°C to 70°C●±150 pA
T
A
= –40°C to 85°C●±200 pA
LT6010S8 40 ±200 pA
T
A
= 0°C to 70°C●±300 pA
T
A
= –40°C to 85°C●±400 pA
LT6010ADD 20 ±200 pA
T
A
= 0°C to 70°C●±300 pA
T
A
= –40°C to 85°C●±400 pA
LT6010DD 40 ±300 pA
T
A
= 0°C to 70°C●±400 pA
T
A
= –40°C to 85°C●±500 pA
Input Noise Voltage 0.1Hz to 10Hz 400 nV
P-P
e
n
Input Noise Voltage Density f = 1kHz 14 nV/√Hz
i
n
Input Noise Current Density f = 1kHz 0.1 pA/√Hz
R
IN
Input Resistance Common Mode, V
CM
= 1V to 3.8V 10 120 GΩ
Differential 20 MΩ
C
IN
Input Capacitance 4pF
V
CM
Input Voltage Range (Positive) Guaranteed by CMRR ●3.8 4 V
Input Voltage Range (Negative) Guaranteed by CMRR ●0.7 1 V
CMRR Common Mode Rejection Ratio V
CM
= 1V to 3.8V ●107 135 dB
Minimum Supply Voltage Guaranteed by PSRR ●2.4 2.7 V
PSRR Power Supply Rejection Ratio V
S
= 2.7V to 36V, V
CM
= 1/2V
S
●112 135 dB
A
VOL
Large-Signal Voltage Gain R
L
= 10k, V
OUT
= 1V to 4V ●300 2000 V/mV
R
L
= 2k, V
OUT
= 1V to 4V ●250 2000 V/mV
V
OUT
Maximum Output Swing No Load, 50mV Overdrive 35 55 mV
(Positive, Referred to V
+
)●65 mV
I
SOURCE
= 1mA, 50mV Overdrive 120 170 mV
●220 mV
Maximum Output Swing No Load, 50mV Overdrive 40 55 mV
(Negative, Referred to 0V) ●65 mV
I
SINK
= 1mA, 50mV Overdrive 150 225 mV
●275 mV
LT6010
4
sn6010 6010fs
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 5V, 0V; VCM = 2.5V; RL to 0V; SHDN = 0.2V, unless otherwise
specified. (Note 5)
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VS = ±15V, VCM = 0V, RL to 0V; SHDN = –14.8V, unless otherwise specified. (Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Note 7) LT6010AS8 10 60 µV
T
A
= 0°C to 70°C●80 µV
T
A
= –40°C to 85°C●110 µV
LT6010S8 20 85 µV
T
A
= 0°C to 70°C●120 µV
T
A
= –40°C to 85°C●160 µV
LT6010ADD 20 85 µV
T
A
= 0°C to 70°C●105 µV
T
A
= –40°C to 85°C●135 µV
LT6010DD 30 110 µV
T
A
= 0°C to 70°C●145 µV
T
A
= –40°C to 85°C●185 µV
∆V
OS
/∆T Input Offset Voltage Drift (Note 6) LT6010AS8, LT6010S8 ●0.2 0.8 µV/°C
LT6010ADD,LT6010DD ●0.2 1.3 µV/°C
I
OS
Input Offset Current (Note 7) LT6010AS8 20 110 pA
T
A
= 0°C to 70°C●150 pA
T
A
= –40°C to 85°C●200 pA
LT6010S8 40 200 pA
T
A
= 0°C to 70°C●300 pA
T
A
= –40°C to 85°C●400 pA
LT6010ADD 20 200 pA
T
A
= 0°C to 70°C●300 pA
T
A
= –40°C to 85°C●400 pA
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
SC
Output Short-Circuit Current (Note 3) V
OUT
= 0V, 1V Overdrive (Source) 10 14 mA
●4mA
V
OUT
= 5V, –1V Overdrive (Sink) 10 21 mA
●4mA
SR Slew Rate A
V
= –10, R
F
= 50k, R
G
= 5k 0.06 0.09 V/µs
T
A
= 0°C to 70°C●0.05 V/µs
T
A
= –40°C to 85°C●0.04 V/µs
GBW Gain Bandwidth Product f = 10kHz 250 330 kHz
●225 kHz
t
s
Settling Time A
V
= –1, 0.01%, V
OUT
= 1.5V to 3.5V 45 µs
t
r
, t
f
Rise Time, Fall Time A
V
= 1, 10% to 90%, 0.1V Step 1 µs
I
SHDN
SHDN Pin Current SHDN ≤ V
–
+ 0.2V (On) ●0.25 µA
SHDN = V
–
+ 2.0V (Off) ●15 25 µA
t
SHDN
SHDN Turn-On, Turn-Off Time SHDN = V
–
(On) to V
–
+ 2.0V (Off) 25 µs
SHDN = V
–
+ 2.0V (Off) to V
–
(On) 25 µs
I
S
Supply Current SHDN ≤ V
–
+ 0.2V (On) 135 150 µA
T
A
= 0°C to 70°C●190 µA
T
A
= –40°C to 85°C●210 µA
SHDN = V
–
+ 2.0V (Off) 12 25 µA
●50 µA
LT6010
5
sn6010 6010fs
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = 0V, RL to 0V; SHDN = –14.8V, unless otherwise
specified. (Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
OS
Input Offset Current (Note 7) LT6010DD 40 300 pA
T
A
= 0°C to 70°C●400 pA
T
A
= –40°C to 85°C●500 pA
I
B
Input Bias Current (Note 7) LT6010AS8 20 ±110 pA
T
A
= 0°C to 70°C●±150 pA
T
A
= –40°C to 85°C●±200 pA
LT6010S8 40 ±200 pA
T
A
= 0°C to 70°C●±300 pA
T
A
= –40°C to 85°C●±400 pA
LT6010ADD 20 ±200 pA
T
A
= 0°C to 70°C●±300 pA
T
A
= –40°C to 85°C●±400 pA
LT6010DD 40 ±300 pA
T
A
= 0°C to 70°C●±400 pA
T
A
= –40°C to 85°C●±500 pA
Input Noise Voltage 0.1Hz to 10Hz 400 nV
P-P
e
n
Input Noise Voltage Density f = 1kHz 13 nV/√Hz
i
n
Input Noise Current Density f = 1kHz 0.1 pA/√Hz
R
IN
Input Resistance Common Mode, V
CM
= ±13.5V 50 400 GΩ
Differential 20 MΩ
C
IN
Input Capacitance 4pF
V
CM
Input Voltage Range Guaranteed by CMRR ●±13.5 ±14 V
CMRR Common Mode Rejection Ratio V
CM
= –13.5V to 13.5V 115 135 dB
●112 dB
Minimum Supply Voltage Guaranteed by PSRR ●±1.2 ±1.35 V
PSRR Power Supply Rejection Ratio V
S
= ±1.35V to ±18V ●112 135 dB
A
VOL
Large-Signal Voltage Gain R
L
= 10k, V
OUT
= –13.5V to 13.5V 1000 2000 V/mV
●600 V/mV
R
L
= 5k, V
OUT
= –13.5V to 13.5V 500 1500 V/mV
●300 V/mV
V
OUT
Maximum Output Swing No Load, 50mV Overdrive 45 80 mV
(Positive, Referred to V
+
)●100 mV
I
SOURCE
= 1mA, 50mV Overdrive 140 195 mV
●240 mV
Maximum Output Swing No Load, 50mV Overdrive 45 80 mV
(Negative, Referred to 0V) ●100 mV
I
SINK
= 1mA, 50mV Overdrive 150 250 mV
●300 mV
I
SC
Output Short-Circuit Current (Note 3) V
OUT
= 0V, 1V Overdrive (Source) 10 15 mA
●5mA
V
OUT
= 0V, –1V Overdrive (Sink) 10 20 mA
●5mA
LT6010
6
sn6010 6010fs
Note 1: Absolute Maximum Ratings are those beyond which the life of the
device may be impaired.
Note 2: The inputs are protected by back–to–back diodes and internal
series resistors. If the differential input voltage exceeds 10V, the input
current must 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: Both the LT6010C and LT6010I are guaranteed functional over the
operating temperature range of –40°C to 85°C.
Note 5: The LT6010C is guaranteed to meet the 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 LT6010I is guaranteed to meet
specified performance from –40°C to 85°C.
Note 6: This parameter is not 100% tested.
Note 7: The specifications for V
OS
, I
B
and I
OS
depend on the grade and on
the package. The following table clarifies the notations used in the
specification table:
Standard Grade A Grade
S8 Package LT6010S8 LT6010AS8
DFN Package LT6010DD LT6010ADD
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Distribution of Input Offset Voltage Input Offset Voltage
vs Temperature Offset Voltage
vs Input Common Mode Voltage
–25
INPUT OFFSET VOLTAGE (µV)
0
PERCENT OF UNITS (%)
5
15
20
25
6010 G01
10
30
–45 –35 –15 –5 5 15 25 35 45
V
S
= 5V, 0V
T
A
= 25°CLT6010AS8
TEMPERATURE (°C)
–50
–125
OFFSET VOLTAGE (µV)
–100
–50
–25
0
125
50
050 75
6010 G02
–75
75
100
25
–25 25 100 125
V
S
= 5V, 0V
REPRESENTATIVE UNITS
INPUT COMMON MODE VOLTAGE (V)
–15
120
100
80
60
40
20
0
–20 010
6010 G03
–10 –5 515
OFFSET VOLTAGE (µV)
T
A
= 85°C
T
A
= 25°C
T
A
= –40°C
V
S
= ±15V
TYPICAL PART
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SR Slew Rate A
V
= –10, R
F
= 50k, R
G
= 5k 0.08 0.11 V/µs
T
A
= 0°C to 70°C●0.07 V/µs
T
A
= –40°C to 85°C●0.05 V/µs
GBW Gain Bandwidth Product f = 10kHz 275 350 kHz
●250 kHz
t
s
Settling Time A
V
= –1, 0.01%, V
OUT
= 0V to 10V 85 µs
t
r
, t
f
Rise Time, Fall Time A
V
= 1, 10% to 90%, 0.1V Step 1 µs
I
SHDN
SHDN Pin Current SHDN ≤ V
–
+ 0.2V (On) ●0.25 µA
SHDN = V
–
+ 2.0V (Off) ●15 25 µA
t
SHDN
SHDN Turn-On, Turn-Off Time SHDN = V
–
(On) to V
–
+ 2.0V (Off) 25 µs
SHDN = V
–
+ 2.0V (Off) to V
–
(On) 25 µs
I
S
Supply Current SHDN ≤ V
–
+ 0.2V (On) 260 330 µA
T
A
= 0°C to 70°C●380 µA
T
A
= –40°C to 85°C●400 µA
SHDN = V
–
+ 2.0V (Off) 18 50 µA
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = ±15V, VCM = 0V, RL to 0V; SHDN = –14.8V, unless otherwise
specified. (Note 5)
LT6010
7
sn6010 6010fs
Total Input Noise
vs Source Resistance 0.1Hz to 10Hz Noise
SOURCE RESISTANCE (Ω)
100 1k 10k 100k 1M 10M
0.0001
TOTAL INPUT NOISE (µV/√Hz)
0.01
10
100M
6010 G07
0.001
0.1
1
TOTAL NOISE
RESISTOR NOISE ONLY
VS = 5V, 0V
TA = 25°C
f = 1kHz
0.01Hz to 1Hz Noise
TIME (SEC)
0
NOISE VOLTAGE (0.2µV/DIV)
8
6010 G08
246 107135 9
V
S
= ±15V
T
A
= 25°C
TIME (SEC)
0
NOISE VOLTAGE (0.2µV/DIV)
80
6010 G09
20 40 60 1007010 30 50 90
V
S
= ±15V
T
A
= 25°C
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Output Voltage Swing
vs Temperature Output Saturation Voltage
vs Load Current (Output High) Output Saturation Voltage
vs Load Current (Output Low)
TEMPERATURE (°C)
–50
OUTPUT VOLTAGE SWING (mV)
–20
25
6010 G10
40
–25 0 50
20
V
–
V
+
–40
–60
60
75 100 125
V
S
= 5V, 0V
NO LOAD
OUTPUT HIGH
OUTPUT LOW
LOAD CURRENT (mA)
0.01
0.01
OUTPUT HIGH SATURATION VOLTAGE (V)
0.1
1
0.1 1 10
6010 G11
TA = 85°C
TA = 25°C
VS = 5V, 0V
TA = –40°C
LOAD CURRENT (mA)
0.01
0.01
OUTPUT LOW SATURATION VOLTAGE (V)
0.1
1
0.1 1 10
6010 G12
T
A
= 85°C
T
A
= 25°C
V
S
= 5V, 0V
T
A
= –40°C
Input Bias Current vs Temperature Input Bias Current
vs Input Common Mode Voltage en, in vs Frequency
TEMPERATURE (°C)
–50
INPUT BIAS CURRENT (pA)
–100
200
100
400
300
600
500
50
6010 G04
0
0
–25 75 100
25
I
B–
I
B+
125
800
700
900
1000 V
S
= 5V, 0V
TYPICAL PART
FREQUENCY (Hz)
1
10
INPUT VOLTAGE NOISE DENSITY (nV/√Hz)
INPUT CURRENT NOISE DENSITY (fA/√Hz)
100 100
1000
10 100 1000
6010 G06
CURRENT NOISE
VOLTAGE NOISE
VS = ±15V
TA = 25°C
2V/DIV
20pA/DIV
–100
100
6010 G05
–15 15
T
A
= –40°C
T
A
= 85°CT
A
= 25°C
LT6010
8
sn6010 6010fs
TYPICAL PERFOR A CE CHARACTERISTICS
UW
THD + Noise vs Frequency Settling Time vs Output Step Settling Time vs Output Step
FREQUENCY (Hz)
10
0.0001
THD + NOISE (%)
0.01
10
1k 10k100
6010 G16
0.001
0.1
1
V
S
= ±15V
V
IN
= 20V
P-P
T
A
= 25°C
A
V
= –1
A
V
= 1
SETTLING TIME (µs)
0
0
OUTPUT STEP (V)
2
6
8
10
20 40 50 90
6010 G17
4
10 30 60 70 80
V
S
= ±15V
A
V
= 1
0.1% 0.01%
SETTLING TIME (µs)
0
0
OUTPUT STEP (V)
2
6
8
10
20 40 50 90
6010 G18
4
10 30 60 70 80
V
S
= ±15V
A
V
= –1
0.1% 0.01%
CMRR vs Frequency PSRR vs Frequency
FREQUENCY (Hz)
110
40
COMMON MODE REJECTION RATIO (dB)
60
80
100
120
100 1k 10k 100k 1M
6010 G20
20
0
140
160 T
A
= 25°C
V
S
= ±15V
V
S
= 5V, 0V
FREQUENCY (Hz)
0.1
0
POWER SUPPLY REJECTION RATIO (dB)
80
100
120
140
1 10 100 1k 10k 100k 1M
6010 G21
60
40
20
V
S
= 5V, 0V
T
A
= 25°C
–PSRR
+PSRR
Supply Current vs Supply Voltage Warm-Up Drift THD + Noise vs Frequency
SUPPLY VOLTAGE (±V)
0
SUPPLY CURRENT (µA)
300
400
500
16
6010 G13
200
100
250
350
450
150
50
042 86 12 14 18
10 20
T
A
= 85°C
T
A
= –40°C
T
A
= 25°C
TIME AFTER POWER-ON (SECONDS)
0
CHANGE IN OFFSET VOLTAGE (µV)
1
2
3
30 60 90 120
6010 G14
150
±15V
±2.5V
FREQUENCY (Hz)
10
0.0001
THD + NOISE (%)
0.01
10
1k 10k100 100k
6010 G15
0.001
0.1
1
VS = 5V, 0V
VOUT = 2VP-P
TA = 25°C
AV = 1: RL = 10k
AV = –1: RF = RG = 10k
AV = –1
AV = 1
LT6010
9
sn6010 6010fs
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Gain vs Frequency, AV = 1 Gain vs Frequency, AV = –1
FREQUENCY (Hz)
1k
–20
GAIN (dB)
0
5
10
10k 100k 1M
6010 G25
–5
–10
–15
V
S
= 5V, 0V
T
A
= 25°C
C
L
= 500pF
C
L
= 50pF
FREQUENCY (Hz)
1k
–20
GAIN (dB)
0
5
10
10k 100k 1M
6010 G26
–5
–10
–15
V
S
= 5V, 0V
T
A
= 25°C
C
L
= 500pF
C
L
= 50pF
Small-Signal Transient Response Large-Signal Transient Response Rail-to-Rail Output Swing
20mV/DIV
A
V
= 1 2µs/DIV 6011 G27
2V/DIV
A
V
= –1 50µs/DIV 6011 G28
V
S
= ±15V
1V/DIV
A
V
= –1 100µs/DIV 6011 G29
V
S
= 5V, 0V
0V
0V
5V
Supply Current in Shutdown Mode
vs Temperature
Output Impedance vs Frequency Open-Loop Gain vs Frequency Gain and Phase vs Frequency
FREQUENCY (Hz)
1
OUTPUT IMPEDANCE (Ω)
1000
0.1
10
100
1 100 1k 10k 100k 1M
6010 G22
0.01 10
VS = 5V, 0V
TA = 25°C
AV = 100
AV = 10
AV = 1
FREQUENCY (Hz)
20
120
100
80
60
40
–20
0
OPEN-LOOP GAIN (dB)
140
0.01 10 100 1k 10k 100k 1M 10M
6010 G23
–40 0.1 1
V
S
= 5V, 0V
T
A
= 25°C
R
L
= 10k
FREQUENCY (Hz)
–10
OPEN-LOOP GAIN (dB)
PHASE SHIFT (DEG)
50
60
–20
–30
40
10
30
20
0
1k 100k 1M 10M
6010 G24
–40
–80
–240
–120
–160
–200
–280
10k
PHASE
GAIN
VS = 5V, 0V
TA = 25°C
RL = 10k
TEMPERATURE (°C)
–40
SUPPLY CURRENT IN SHUTDOWN (µA)
80
6010 G30
–20–30 0 30 40 60 70 9020 50
40
35
30
25
20
15
10
5
0
V
S
= ±15V
V
S
= 5V, 0V
10–10
LT6010
10
sn6010 6010fs
Preserving Input Precision
Preserving the input accuracy of the LT6010 requires that
the applications circuit and PC board layout do not intro-
duce errors comparable to or greater than the 20µV typical
offset of the amplifier. Temperature differentials across
the input connections can generate thermocouple volt-
ages of 10’s of microvolts, so the connections to the input
leads should be short, close together, and away from heat
dissipating components. Air currents across the board
can also generate temperature differentials.
The extremely low input bias currents (20pA typical) allow
high accuracy to be maintained with high impedance
sources and feedback resistors. The LT6010 low input
bias currents are obtained by a cancellation circuit on-
chip. The input bias currents are permanently trimmed at
wafer testing to a low level. Do not try to balance the input
resistances in each input lead; instead, keep the resistance
at either input as low as possible for maximum accuracy.
Leakage currents on the PC board can be higher than the
LT6010’s input bias current. For example, 10GΩ of leak-
age between a 15V supply lead and an input lead will gen-
erate 1.5nA! Surround the input leads by a guard ring, driven
to the same potential as the input common mode, to avoid
excessive leakage in high impedance applications.
Input Protection
The LT6010 features on-chip back-to-back diodes be-
tween the input devices, along with 500Ω resistors in
series with either input. This internal protection limits the
input current to approximately 10mA (the maximum
allowed) for a 10V differential input voltage. Use additional
external series resistors to limit the input current to 10mA
in applications where differential inputs of more than 10V
are expected. For example, a 1k resistor in series with each
input provides protection against 30V differential voltage.
Input Common Mode Range
The LT6010 output is able to swing nearly to each power
supply rail (rail-to-rail out), but the input stage is limited to
operating between V
–
+ 1V and V
+
– 1.2V. Exceeding this
common mode range will cause the gain to drop to zero,
however no phase reversal will occur.
Total Input Noise
The LT6010 amplifier contributes negligible noise to the
system when driven by sensors (sources) with impedance
between 20kΩ and 1MΩ. Throughout this range, total
input noise is dominated by the 4kTR
S
noise of the source.
If the source impedance is less than 20kΩ, the input
voltage noise of the amplifier starts to contribute with a
minimum noise of 14nV/√Hz for very low source imped-
ance. If the source impedance is more than 1MΩ, the input
current noise of the amplifier, multiplied by this high
impedance, starts to contribute and eventually dominate.
Total input noise spectral density can be calculated as:
v e kTR i R
n TOTAL n S n S()
()=+ +
22
4
where e
n
= 14nV/√Hz, i
n
= 0.1pA/√Hz and R
S
the total
impedance at the input, including the source impedance.
APPLICATIO S I FOR ATIO
WUUU
LT6010
11
sn6010 6010fs
APPLICATIO S I FOR ATIO
WUUU
Offset Voltage Adjustment
The input offset voltage of the LT6010 and its drift with
temperature are permanently trimmed at wafer testing to
the low level as specified in the electrical characteristic.
However, if further adjustment of V
OS
is desired, nulling with
a 50k potentiometer is possible and will not degrade drift
with temperature. Trimming to a value other than zero
+
–
6010 F01a
3
2
1
8
LT6010INPUT OUTPUT
VCC
Vee
50k
4
6
7
+
–
6010 F02a
3
2
1
8
LT6010
10k
50k
10k
4
6
7
INPUT OUTPUT
VCC
Vee
POTENTIOMETER POSITION
0 0.2 0.4 0.6 0.8 1.0
CHANGE IN OFFSET VOLTAGE (mV)
6010 F01b
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
POTENTIOMETER POSITION
01.0
CHANGE IN OFFSET VOLTAGE (µV)
6010 F02b
–200
200
150
100
50
0
–50
–100
–150
0.2 0.4 0.6 0.8
Standard Adjustment
Improved Sensitivity Adjustment
Figure 1A Figure 1B
Figure 2A Figure 2B
creates a drift of (V
OS
/300µV) µV/°C, e.g., if V
OS
is adjusted
to 300µV, the change in drift will be 1µV/°C. The adjustment
range with a 50k pot is approximately ±0.9mV (see Figures
1A and 1B). The sensitivity and resolution of the nulling can
be improved by using a smaller pot in conjunction with fixed
resistors. The configuration shown has an approximate
nulling range of ±150µV (see Figures 2A and 2B).
LT6010
12
sn6010 6010fs
Shutdown
The LT6010 can be put into shutdown mode to conserve
power. When the SHDN pin is biased at less than 0.2V
above the negative supply, the part operates normally.
When pulled 2V or more above V
–
, the supply current
drops to about 12µA, shutting down the op amp.
The output of the LT6010 op amp is not isolated from the
inputs while in shutdown mode. Therefore, this shutdown
feature cannot be used for multiplexing applications.
There is an internal 85k resistor at the SHDN pin. If the
SHDN voltage source is more than 2V above the negative
supply, an external series resistor can be placed between
the source and SHDN pin to reduce SHDN pin current (see
Figure 3). For an example of suggested values see Table 1.
The resistors listed ensure that the voltage at the SHDN pin
is 2V above the negative supply.
Table 1
V
SHDN
(V) R
SHDN
(kΩ)
2 NONE
3 77k
4 153k
5 230k
APPLICATIO S I FOR ATIO
WUUU
Rail-to-Rail Operation
The LT6010 outputs can swing to within millivolts of either
supply rail, but the inputs cannot. However, for most op
amp configurations, the inputs need to swing less than the
outputs. Figure 4 shows the basic op amp configurations,
lists what happens to the op amp inputs and specifies
whether or not the op amp must have rail-to-rail inputs.
Select a rail-to-rail input op amp only when really neces-
sary, because the input precision specifications are usu-
ally inferior.
6010 F03
V
EE
R
SHDN
V
SHDN
SHDN 85k
5
V
EE
+
–
Figure 3
R
G
V
REF
NONINVERTING: A
V
= 1 + R
F
/R
G
INPUTS MOVE AS MUCH AS
V
IN
, BUT THE OUTPUT MOVES
MORE
INPUT MAY NOT HAVE TO BE
RAIL-TO-RAIL
NONINVERTING: A
V
= 1
INPUTS MOVE AS MUCH AS THE
OUTPUT
INPUT MUST BE RAIL-TO-RAIL
FOR OVERALL CIRCUIT
RAIL-TO-RAIL PERFORMANCE
INVERTING: A
V
= –R
F
/R
G
OP AMP INPUTS DO NOT MOVE,
BUT ARE FIXED AT DC BIAS
POINT V
REF
INPUT DOES NOT HAVE TO BE
RAIL-TO-RAIL
V
IN
R
F
–
+
V
IN
V
REF
R
F
R
G
–
+
V
IN
6010 F04
–
+
Figure 4. Some Op Amp Configurations Do Not Require
Rail-to-Rail Inputs to Achieve Rail-to-Rail Outputs
Capacitive Loads
The LT6010 can drive capacitive loads up to 500pF in unity
gain. The capacitive load driving capability increases as
the amplifier is used in higher gain configurations. A small
series resistance between the output and the load further
increases the amount of capacitance that the amplifier can
drive.
LT6010
13
sn6010 6010fs
SI PLIFIED SCHE ATIC
WW
6010 SS
Q17
Q16
Q3
Q7
Q8
C
B
A
B
A
Q15
V
+
V
–
Q1 Q2
D2D1
Q11
Q10
Q21
Q4
Q6
Q5
C2
Q12
D3
D4
D5
Q14 Q20
Q19
Q13
Q18
R3 R4 R6
R5
R
C1
R1
500Ω
R2
500Ω
C1
C3
+IN
–IN
OUT
Q9 Q10
6
4
3
2
8
7
NULL NULL
1
SHDN 5
BIAS CURRENT
GENERATOR
LT6010
14
sn6010 6010fs
U
PACKAGE DESCRIPTIO
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
3.00 ±0.10
(4 SIDES)
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. ALL DIMENSIONS ARE IN MILLIMETERS
3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE
MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE
4. EXPOSED PAD SHALL BE SOLDER PLATED
0.38 ± 0.10
BOTTOM VIEW—EXPOSED PAD
1.65 ± 0.10
(2 SIDES)
0.75 ±0.05
R = 0.115
TYP
2.38 ±0.10
(2 SIDES)
14
85
PIN 1
TOP MARK
0.200 REF
0.00 – 0.05
(DD8) DFN 0203
0.28 ± 0.05
2.38 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
1.65 ±0.05
(2 SIDES)2.15 ±0.05
0.50
BSC
0.675 ±0.05
3.5 ±0.05
PACKAGE
OUTLINE
0.28 ± 0.05 0.50 BSC
LT6010
15
sn6010 6010fs
U
PACKAGE DESCRIPTIO
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.016 – .050
(0.406 – 1.270)
.010 – .020
(0.254 – 0.508)× 45°
0°– 8° TYP
.008 – .010
(0.203 – 0.254)
SO8 0303
.053 – .069
(1.346 – 1.752)
.014 – .019
(0.355 – 0.483)
TYP
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
1234
.150 – .157
(3.810 – 3.988)
NOTE 3
8765
.189 – .197
(4.801 – 5.004)
NOTE 3
.228 – .244
(5.791 – 6.197)
.245
MIN .160 ±.005
RECOMMENDED SOLDER PAD LAYOUT
.045 ±.005
.050 BSC
.030 ±.005
TYP
INCHES
(MILLIMETERS)
NOTE:
1. DIMENSIONS IN
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
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.
LT6010
16
sn6010 6010fs
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LINEAR TECHNOLOGY CORPORATION 2003
LT/TP 1203 1K • PRINTED IN USA
PART NUMBER DESCRIPTION COMMENTS
LT6011/6012 Dual/Quad Precision Op Amps 135µA, Rail-to-Rail Output
LT1001 Low Power, Picoamp Input Precision Op Amp 250pA Input Bias Current
LT1880 Rail-to-Rail Output, Picoamp Input Precision Op Amp C
LOAD
up to 1000pF
RELATED PARTS
U
TYPICAL APPLICATIO
Precision JFET Input Transimpedance Photodiode Amplifier
–
+
6010 TA02
C4
0.5pF C3
1pF
S1
U1
LT6010
–
+
U2
LT6230
V
+
V
–
V
–
R1
330k, 5%
R2
1k
5%
R3
100k, 1%
C1
0.01µF
C2
0.1µF
J1
J1: PHILIPS BF862
S1: SIEMENS/INFINEON SFH203 PHOTODIODE (~3pF)
V
SUPPLY
= ±5V
I
SUPPLY
= 5.6mA
BANDWIDTH = 6MHz
A
Z
= 100kΩ
OUTPUT OFFSET ≈ 50µV TYPICALLY
V
OUT
R4
2.55k
