LT1006
Precision, Single Supply
Op Amp
U
FEATURES
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DESCRIPTIO
The LT ®1006 is the first precision single supply operational
amplifier. Its design has been optimized for single supply
operation with a full set of specifications at 5V.
Specifications at ±15V are also provided.
Single Supply Operation
Input Voltage Range Extends to Ground
Output Swings to Ground while Sinking Current
Guaranteed Offset Voltage: 50µV Max
Guaranteed Low Drift: 1.3µV/°C Max
Guaranteed Offset Current: 0.5nA Max
Guaranteed High Gain
5mA Load Current: 1.5 Million Min
17mA Load Current: 0.8 Million Min
Guaranteed Low Supply Current: 520µA Max
Supply Current can be Reduced by a Factor of 4
Low Voltage Noise, 0.1Hz to 10Hz: 0.55µVP-P
Low Current Noise—
Better than OP-07: 0.07pA/√Hz at 10Hz
High Input Impedance: 250MΩ Min
Minimum Supply Voltage: 2.7V Min
The LT1006 has a low offset voltage of 20µV, drift of
0.2µV/°C, offset current of 120pA, gain of 2.5 million,
common mode rejection of 114dB and power supply
rejection of 126dB.
Although supply current is only 340µA, a novel output
stage can source or sink in excess of 20mA while retaining
high voltage gain. Common mode input range includes
ground to accommodate low ground-referenced inputs
from strain gauges or thermocouples, and output can
swing to within a few millivolts of ground. If a higher
slew rate (in excess of 1V/µs) or micropower operation
(supply current down to 90µA) is required, the operating
currents can be modified by connecting an external
optional resistor to Pin 8.
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APPLICATIO S
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Low Power Sample-and-Hold Circuits
Battery-Powered Precision Instrumentation
Strain Gauge Signal Conditioners
Thermocouple Amplifiers
4mA to 20mA Current Loop Transmitters
Active Filters
For similar single supply precision dual and quad op amps,
please see the LT1013/LT1014 data sheet. For micropower
dual and quad op amps, please see the LT1078/LT1079
data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATIO
LT1006 Single Supply, Micropower Sample and Hold
Distribution of Input Offset Voltage
9V
20
18
360k
1/4 CD4066
360k
1/4 CD4066
16
14
S3
S4
390Ω
UNITS (%)
390Ω
8
INPUT
0V TO 5V
3
–
8
A1
LT1006
+
2
1/2 CD4066
7
2
S1
6
S2
4
1/2 CD4066
SAMPLE-HOLD COMMAND
HIGH = SAMPLE
LOW = HOLD
LT1006 • TA01
3
–
A2
LT1006
+
7
6
12
10
8
6
OUTPUT
4
4
2
0.01µF
ACQUISITION TIME
HOLD SETTLING TIME
S-H OFFSET
HOLD SUPPLY CURRENT
SAMPLE SUPPLY CURRENT
1kHz SAMPLE RATE CURRENT
VS = 5V, 0V
TA = 25°C
350 LT1006s TESTED
FROM TWO RUNS
J AND N PACKAGES
20µs
10µs
1mV
250µA
5.0mA
800µA
0
–80
40
80
–40
0
INPUT OFFSET VOLTAGE (µV)
LT1006 • G01
1006fa
1
LT1006
W W
W
AXI U
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ABSOLUTE
RATI GS
(Note 1)
Supply Voltage ...................................................... ±22V
Input Voltage ............... Equal to Positive Supply Voltage
Input Voltage ............ 5V Below Negative Supply Voltage
Differential Input Voltage ......................................... 30V
Output Short-Circuit Duration .......................... Indefinite
Operating Temperature Range
LT1006AM/LT1006M (OBSOLETE)....– 55°C to 125°C
LT1006AC/LT1006C/LT1006S8 ............... 0°C to 70°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
U
U
W
PACKAGE/ORDER I FOR ATIO
ORDER
PART NUMBER
TOP VIEW
ISY SET
(NOTE 3)
VOS 1
TRIM
–IN 2
8
7 V+
–
+
+IN 3
4
V–
(CASE)
6 OUT
LT1006AMH
LT1006MH
LT1006ACH
LT1006CH
5 VOS
TRIM
(NOTE 4)
TOP VIEW
VOS 1
TRIM
–IN 2
–
+
+IN 3
7
ISY SET
(NOTE 3)
V+
6
OUT
5
VOS TRIM
(NOTE 4)
8
V– 4
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
ORDER
PART NUMBER
LT1006CN8
LT1006S8
S8 PART MARKING
1006
TJMAX = 100°C, θJA = 130°C/W (N8)
TJMAX = 150°C, θJA = 200°C/W (S8)
LT1006AMJ8
LT1006MJ8
LT1006ACJ8
LT1006CJ8
J8 PACKAGE 8-LEAD CERDIP
TJMAX = 100°C, θJA = 130°C/W
H PACKAGE
8-LEAD TO-5 METAL CAN
TJMAX = 150°C, θJA = 150°C, θJC = 45°C
OBSOLETE PACKAGES
Consider the N8 or S8 Package for Alternate Source
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
VOS
Input Offset Voltage
CONDITIONS
VS = 5V, VCM = 0V, VOUT = 1.4V, TA = 25°C, unless otherwise noted.
MIN
LT1006AM/AC
TYP
MAX
20
MIN
50
30
80
LT1006S8
∆VOS
∆Time
Long-Term Input Offset
Voltage Stability
IOS
Input Offset Current
IB
Input Bias Current
en
Input Noise Voltage
0.1Hz to 10Hz
Input Noise Voltage Density
fO = 10Hz
fO = 1000Hz
Input Noise Current Density
fO = 10Hz
Input Resistance
Differential Mode
Common Mode
(Note 2)
in
0.4
80
400
0.5
0.7
LT1006S8
UNITS
µV
µV
µV/Mo
µV/Mo
0.12
0.5
0.15
0.9
nA
9
15
10
25
nA
0.55
23
22
0.55
32
25
23
22
0.07
180
LT1006M/C
TYP
MAX
400
5
100
µVP-P
32
25
nV/√Hz
nV/√Hz
0.08
pA/√Hz
300
4
MΩ
GΩ
1006fa
2
LT1006
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
VS = 5V, VCM = 0V, VOUT = 1.4V, TA = 25°C, unless otherwise noted.
CONDITIONS
MIN
Input Voltage Range
LT1006AM/AC
TYP
MAX
MIN
LT1006M/C
TYP
MAX
UNITS
3.5
0
3.8
– 0.3
3.5
0
3.8
– 0.3
V
V
CMRR
Common Mode Rejection Ratio
VCM = 0V to 3.5V
100
114
97
112
dB
PSRR
Power Supply Rejection Ratio
VS = ±2V to ±18V, VO = 0V
106
126
103
124
dB
AVOL
Large-Signal Voltage Gain
VO = 0.03V to 4V, RL = 10k
VO = 0.03V to 3.5V, RL = 2k
1.0
0.5
2.5
2.0
0.7
0.3
2.0
1.8
V/µV
V/µV
Maximum Output Voltage Swing
Output Low, No Load
Output Low, 600Ω to GND
Output Low, ISINK = 1mA
Output High, No Load
Output High, 600Ω to GND
4.0
3.4
15
5
220
4.4
4.0
4.0
3.4
15
5
220
4.4
4.0
0.25
0.4
0.25
0.4
SR
Slew Rate
IS
Supply Current
RSET = ∞
RSET = 180k Pin 8 to Pin 7 (Note 3)
Minimum Supply Voltage
340
90
25
10
350
520
2.7
350
90
25
10
350
mV
mV
mV
V
V
V/µs
570
2.7
µA
µA
V
The ● denotes the specifications which apply over the full operating temperature range. VS = 5V, 0V; VCM = 0.1V; VO = 1.4V;
–55°C ≤ TA ≤ 125°C, unless otherwise noted.
LT1006AM
TYP
MAX
●
40
Input Offset Voltage Drift
●
IOS
Input Offset Current
IB
Input Bias Current
AVOL
Large-Signal Voltage Gain
VO = 0.05V to 3.5V, RL = 2k
●
0.25
0.8
0.15
0.7
V/µV
CMRR
Common Mode Rejection Ratio
VCM = 0.1V to 3.2V
●
90
103
87
102
dB
PSRR
Power Supply Rejection Ratio
VS = ±2V to ±18V, VO = 0V
●
100
117
97
116
dB
Maximum Output Voltage Swing
Output Low, 600Ω to GND
Output High, 600Ω to GND
●
●
6
3.8
15
3.1
6
3.8
18
3.2
mV
V
380
630
400
680
µA
SYMBOL
PARAMETER
VOS
Input Offset Voltage
∆VOS
∆Temp
IS
Supply Current
LT1006M
TYP
MAX
UNITS
180
60
250
µV
0.2
1.3
0.3
1.8
µV/°C
●
0.4
2.0
0.5
4.0
nA
●
13
25
16
40
nA
CONDITIONS
MIN
●
MIN
1006fa
3
LT1006
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range. VS = 5V, 0V; VCM = 0V; VO = 1.4V; 0°C ≤ TA ≤ 70°C, unless otherwise noted.
LT1006AC
TYP
MAX
●
●
●
30
●
●
●
Input Offset Current
IB
Input Bias Current
AVOL
Large-Signal Voltage Gain
VO = 0.04V to 3.5V, RL = 2k
●
0.35
1.3
0.25
1.2
V/µV
CMRR
Common Mode Rejection Ratio
VCM = 0V to 3.4V
●
96
109
92
108
dB
PSRR
Power Supply Rejection Ratio
VS = ±2V to ±18V, VO = 0V
●
101
120
97
118
dB
Maximum Output Voltage Swing
Output Low, 600Ω to GND
Output High, 600Ω to GND
●
●
6
3.9
13
3.2
6
3.9
13
3.3
mV
V
350
570
360
620
µA
LT1006M/C
TYP
MAX
UNITS
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
J8/H Package
N8 Package
S8 Package
∆VOS
∆Temp
Input Offset Voltage Drift
J8/H Package
N8 Package
S8 Package
IOS
IS
Supply Current
LT1006C
TYP
MAX
UNITS
110
45
50
110
160
190
560
µV
µV
µV
0.2
1.3
0.3
0.5
0.7
1.8
2.5
3.5
µV/°C
µV/°C
µV/°C
●
0.25
1.2
0.3
2.5
nA
●
11
20
12
30
nA
MIN
●
MIN
VS = ±15V, TA = 25°C, unless otherwise noted.
SYMBOL
PARAMETER
VOS
Input Offset Voltage
CONDITIONS
MIN
LT1006AM/AC
TYP
MAX
MIN
30
100
50
100
180
525
µV
µV
LT1006S8
IOS
Input Offset Current
0.1
0.5
0.15
0.9
nA
IB
Input Bias Current
7.5
12.0
8
20
nA
Input Voltage Range
13.5
–15.0
13.8
–15.3
13.5
–15.0
13.8
–15.3
V
V
CMRR
Common Mode Rejection Ratio
VCM = +13.5V, –15V
100
117
97
116
dB
PSRR
Power Supply Rejection Ratio
VS = ±2V to ±18V, VO = 0V
106
126
103
124
dB
AVOL
Large Signal Voltage Gain
VO = ±10V, RL = 2k
VO = ±10V, RL = 600Ω
1.5
0.8
5.0
1.5
1.2
0.5
4.0
1.0
V/µV
V/µV
VOUT
Maximum Output Voltage Swing
RL = 2k
±13
±14
±12.5
±14
V
SR
Slew Rate
RSET = ∞
RSET = 390Ω Pin 8 to Pin 4
0.25
1.0
0.4
1.2
0.25
1.0
0.4
1.2
V/µs
V/µs
IS
Supply Current
360
540
360
600
µA
1006fa
4
LT1006
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range. VS = ±15V, –55°C ≤ TA ≤ 125°C, unless otherwise noted.
LT1006AM
TYP
MAX
●
80
Input Offset Voltage Drift
●
IOS
Input Offset Current
IB
Input Bias Current
AVOL
Large-Signal Voltage Gain
VO = ±10V, RL = 2k
●
0.5
1.5
0.25
1.0
V/µV
CMRR
Common Mode Rejection Ratio
VCM = +13V, –14.9V
●
97
114
94
113
dB
PSRR
Power Supply Rejection Ratio
VS = ±2V to ±18V, VO = 0V
●
100
117
97
116
dB
Maximum Output Voltage Swing
RL = 2k
●
±12
±13.8
±11.5
±13.8
V
SYMBOL
PARAMETER
VOS
Input Offset Voltage
∆VOS
∆Temp
IS
LT1006M
TYP
MAX
UNITS
320
110
460
µV
0.5
2.2
0.6
2.8
µV/°C
●
0.2
2.0
0.3
3.0
nA
●
9
18
11
27
nA
CONDITIONS
Supply Current
MIN
400
●
MIN
650
400
750
µA
The ● denotes the specifications which apply over the full operating temperature range. VS = ±15V, 0°C ≤ TA ≤ 70°C, unless otherwise
noted.
LT1006AC
TYP
MAX
●
●
●
50
●
●
●
Input Offset Current
IB
Input Bias Current
AVOL
Large-Signal Voltage Gain
VO = ±10V, RL = 2k
●
1
3
0.7
2.5
V/µV
CMRR
Common Mode Rejection Ratio
VCM = 13V, –15V
●
98
116
94
114
dB
PSRR
Power Supply Rejection Ratio
VS = ±2V to ±18V, VO = 0V
●
101
120
97
118
dB
Maximum Output Voltage Swing
RL = 2k
●
±12.5
±13.9
±11.5
±13.8
V
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
J8/H Package
N8 Package
S8 Package
∆VOS
∆Temp
Input Offset Voltage Drift
J8/H Package
N8 Package
S8 Package
IOS
IS
Supply Current
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: This parameter is guaranteed by design and is not tested.
Note 3: Regular operation does not require an external resistor. In order
to program the supply current for low power or high speed operation,
connect an external resistor from Pin 8 to Pin 7 or from Pin 8 to Pin 4,
respectively. Supply current specifications (for RSET = 180k) do not include
current in RSET.
LT1006C
TYP
MAX
UNITS
200
75
80
150
300
330
730
µV
µV
µV
0.5
2.2
0.6
0.7
1.0
2.8
3.5
4.5
µV/°C
µV/°C
µV/°C
●
0.15
1
0.25
2
nA
●
8
15
10
23
nA
MIN
●
370
600
MIN
380
660
µA
Note 4: Optional offset nulling is accomplished with a potentiometer
connected between the trim terminals and the wiper to V–. A 10k pot
(providing a null range of ±6mV) is recommended for minimum drift of
nulled offset voltage with temperature. For increased trim resolution and
accuracy, two fixed resistors can be used in conjunction with a smaller
potentiometer. For example, two 4.7k resistors tied to Pins 1 and 5, with a
500Ω pot in the middle, will have a null range of ±150µV.
1006fa
5
LT1006
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Offset Voltage Drift with Temperature
of Representative Units
Offset Voltage vs Balanced Source
Resistor
150
10
30
0
–30
–60
–90
RS
1.0
RS
+
0.1
1k
125
0
2 T = 25°C
2 T = 125°C
1 POSITIVE VOS
2 NEGATIVE VOS
1.0
0
0.4
0.8
COMMON MODE INPUT VOLTAGE (V)
Voltage Gain vs Load Resistance
with VS = ±15V
10M
10M
TA = 25°C
TA = –55°C
VOLTAGE GAIN (V/V)
VOLTAGE GAIN (V/V)
1.4
LT1006 • G04
VS = 5V, 0V
TA = 25°C
1.0
1 T = 25°C
–100
Voltage Gain vs Load Resistance,
VS = 5V, 0V
1.5
1 T = 125°C
100
LT1006 • G03
Warm-Up Drift
TA = 25°C
1M
TA = 125°C
0.5
TA = –55°C
TA = 125°C
1M
LT1006 METAL CAN (H) PACKAGE
LT1006 CERDIP (J) PACKAGE
0
2
3
1
TIME AFTER POWER ON (MIN)
0
100k
100
4
1k
LOAD RESISTANCE TO GROUND (Ω)
INPUT OFFSET CURRENT (nA)
VS = 5V, 0V
9
VS = ±15V
3
0
–50 –25
50
25
75
0
TEMPERATURE (˚C)
100
125
LT1006 • G08
0.4
0.3
0.2
0.1
0
–50 –25
VS = 5V, 0V
VS = ±15V
50
25
0
75
TEMPERATURE (°C)
100
125
LT1006 • G09
5
15
4
10
3
5
2
0
1
–5
VS = 5V, 0V, T = 125°C
0
VS = ±15V,
T = 25°C
–1
0
VS = 5V, 0V, T = 25°C
–18
–6
–12
INPUT BIAS CURRENT (nA)
–10
–15
–24
COMMON MODE INPUT VOLTAGE, VS = 15V (V)
VCM = 0V
12
6
Input Bias Current
vs Common Mode Voltage
0.5
VCM = 0V
10k
LT1006 • G07
Input Offset Current
vs Temperature
Input Bias Current vs Temperature
15
1k
LOAD RESISTANCE TO GROUND (Ω)
LT1006 • G06
LT1006 • G05
18
100k
100
10k
COMMON MODE INPUT VOLTAGE, VS = 5V, 0V (V)
CHANGE IN OFFSET VOLTAGE (µV)
200
–300
–0.4
3k 10k 30k 100k 300k 1M 3M 10M
BALANCED SOURCE RESISTANCE, RS (Ω)
LT1006 • G02
2.0
300
–200
VS = ±15V, 25°C
VS = 5V, 0V, 25°C
0.01
100
–
VS = ±15V,
–55°C TO 125°C
–120
50
25
0
75
TEMPERATURE (°C)
400
OFFSET VOLTAGE (µV)
INPUT OFFSET VOLTAGE (µV)
60
–150
–50 –25
VS = 5V, 0V
VS = 5V, 0V, –55°C TO 125°C
90
OFFSET VOLTAGE (µV)
500
VS = 5V, 0V
VCM = 0.1V
120
INPUT BIAS CURRENT (nA)
VOS vs Common Mode Voltage
vs Temperature
LT1006 • G10
1006fa
6
LT1006
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Noise Spectrum
1000
NUMBER OF UNITS
80
VOLTAGE NOISE DENSITY (nV/√Hz)
CURRENT NOISE DENSITY (fA/√Hz)
VS = ±2.5V
TA = 25°C
200 UNITS TESTED
FROM THREE RUNS
60
40
20
0.1Hz to 10Hz Noise
TA = 25°C
VS = ±2V TO ±18V
VS = ±2V TO ±15V
TA = 25°C
NOISE VOLTAGE (100nV/DIV)
10Hz Voltage Noise Distribution
100
300
100
CURRENT NOISE
VOLTAGE NOISE
30
1/f CORNER 2Hz
10
0
16
28
24
20
VOLTAGE NOISE DENSITY (nV/√Hz)
10
100
FREQUENCY (Hz)
1
32
1k
0
4
6
TIME (SEC)
Supply Current vs Temperature
Increasing Slew Rate (RSET to V –)
1000
10
1
100
0.1
SLEW RATE (V/µs)
SUPPLY CURRENT (µA)
SUPPLY CURRENT (µA)
VS = 5V, 0V
ISY*
SUPPLY CURRENT (mA)
350
SR
SLEW RATE (V/µs)
VS = ±15V
10
VS = ±15V
OR VS = 5V, 0V
VS = 5V, 0V
450
10
LT1006 • G13
Reducing Power Dissipation
400
8
LT1006 • G12
LT1006 • G11
500
2
ISY
1
1
SR
300
250
–50 –25
50
25
0
75
TEMPERATURE (°C)
100
125
LT1006 • G14
PIN 8 IS APPROXIMATELY
60mV ABOVE THE NEGATIVE SUPPLY
10
10
5
1
50
CURRENT INJECTED INTO PIN 8 (µA)
0.01
0.5
0.1
100
PIN 8 IS APPROXIMATELY
60mV ABOVE THE NEGATIVE SUPPLY
1k
RSET, PIN 8 TO PIN 4 (Ω)
*ISY DOES NOT INCLUDE CURRENT THROUGH RSET
0.1
10k
LT1006 • G16
LT1006 • G15
5
V + = 5V TO 30V
V – = 0V
MAXIMUM OUTPUT VOLTAGE (V)
SATURATION VOLTAGE (V)
10
Maximum Output Swing
vs Load Resistor
ISINK = 10mA
1.0
ISINK = 5mA
ISINK = 1mA
0.1
ISINK = 100µA
ISINK = 10µA
Common Mode Rejection Ratio
vs Frequency
120
VS = 5V, 0V
4
COMMON MODE REJECTION RATIO (dB)
Output Saturation vs Sink Current
vs Temperature
TA = 125°C
TA = 25°C
3
TA = – 55°C
2
1
ISINK = 0
0.01
–50 –25
0
25
50
75
100
125
TEMPERATURE (°C)
LT1006 • G17
0
0.01
0.1
1
LOAD RESISTOR (kΩ)
10
LT1006 • G18
TA = 25°C
100
VS = 5V, 0V
80
VS = ±15V
60
40
20
0
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
LT1006 • G19
1006fa
7
LT1006
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Voltage Gain vs Frequency
TA = 25°C
VCM = 0V
CL = 10pF
20
PHASE
VOLTAGE GAIN (dB)
100
80
60
VS = 5V, 0V
VS = ±15V
40
100
120
±15V
10
140
±15V
GAIN
160
5V, 0V
0
5V, 0V
180
200
20
0
–10
–20
0.01 0.1
1
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
0.1
0.3
3
1
FREQUENCY (MHz)
LT1006 • G20
4V
4V
2V
2V
0V
0V
1006 G23
NEGATIVE
SUPPLY
80
POSITIVE
SUPPLY
60
40
20
VS = ±15V + 1Vp-p SINE WAVE
TA = 25°C
0
0.1
10
1
10
100 1k
10k
FREQUENCY (Hz)
100k
1M
LT1006 • G22
Large-Signal Transient Response,
VS = 5V, 0V
AV = 1
RL = 4.7k TO 5V
INPUT = 0V TO 3.8V
100
LT1006 • G21
Large Transient Response,
VS = 5V, 0V
10µs/DIV
120
POWER SUPPLY REJECTION RATIO (dB)
120
VOLTAGE GAIN (dB)
80
TA = 25°C
CL = 10pF
PHASE SHIFT (DEGREES)
140
Power Supply Rejection Ratio
vs Frequency
Gain, Phase vs Frequency
Large-Signal Transient Response,
VS = ±15V
5V/DIV
10µs/DIV
AV = 1
RL = 4.7k TO GROUND
INPUT = 0V TO 3.8V
50µs/DIV
1006 G24
1006 G25
AV = 1
Small-Signal Transient Response,
VS = 5V, 0V
Small-Signal Transient Response,
VCC = ± 2.5V to ±15V
100mV
20mV/DIV
0V
20µs/DIV
AV = 1
CL = 10pF
RL = 600Ω TO GND
INPUT = 0V TO 100mV PULSE
2µs/DIV
1006 G26
1006 G27
AV = 1
CL = 10pF
1006fa
8
LT1006
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APPLICATIO S I FOR ATIO
The LT1006 is fully specified for single supply operation,
(i.e., when the negative supply is 0V). Input common
mode range includes ground; the output swings within a
few millivolts of ground. Single supply operation, however, can create special difficulties, both at the input and
at the output. The LT1006 has specific circuitry which
addresses these problems.
At the input, the driving signal can fall below 0V—
inadvertently or on a transient basis. If the input is more
than a few hundred millivolts below ground, two distinct
problems can occur on previous single supply designs,
such as the LM124, LM158, OP-20, OP-21, OP-220,
OP-221, OP-420:
a) When the input is more than a diode drop below ground,
unlimited current will flow from the substrate (V– terminal) to the input. This can destroy the unit. On the LT1006,
the 400Ω resistors, in series with the input (see Schematic
Diagram), protect the devices even when the input is 5V
below ground.
b) When the input is more than 400mV below ground
(at 25°C), the input stage saturates (transistors Q3 and
Q4) and phase reversal occurs at the output. This can
cause lock-up in servo systems. Due to a unique phase
reversal protection circuitry (Q21, Q22, Q27, Q28), the
LT1006’s output does not reverse, as illustrated below,
even when the inputs are at –1.5V.
At the output, the aforementioned single supply designs
either cannot swing to within 600mV of ground (OP-20)
or cannot sink more than a few microamperes while
swinging to ground (LM124, LM158). The LT1006’s
all-NPN output stage maintains its low output resistance
and high gain characteristics until the output is saturated.
In dual supply operations, the output stage is crossover
distortion free.
Since the output cannot go exactly to ground, but can only
approach ground to within a few millivolts, care should be
exercised to ensure that the output is not saturated. For
example, a 1mV input signal will cause the amplifier to set
up in its linear region in the gain 100 configuration shown
below, but is not enough to make the amplifier function
properly in the voltage follower mode.
Voltage Follower with Input Exceeding the Negative Common Mode Range (VS = 5V, 0V)
4V
4V
4V
2V
2V
2V
0V
0V
0V
6VP-P INPUT, –1.5V TO 4.5V
R
LT1006
NO PHASE REVERSAL
1006 TA11b
Gain 100 Amplifier
Voltage Follower
5V
5V
99R
–
LT1006
1mV
LM324, LM358, OP-20, OP-21
EXHIBIT OUTPUT PHASE
REVERSAL
1006 TA11a
+
–
600Ω
LT1006 • TA02
OUTPUT
SATURATED
≈ 5mV
LT1006
100mV
1mV
+
1006 TA11c
600Ω
LT1006 • TA03
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9
LT1006
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APPLICATIO S I FOR ATIO
In automated production testing the output is forced to
1.4V by the test loop; offset voltage is measured with a
common mode voltage of zero and the negative supply at
zero (Pin 4). Without the test loop, these exact conditions
cannot be achieved. The test circuit shown ensures that
the output will never saturate even with worst-case offset
voltages (– 250µV over the – 55°C to 125°C range). The
effective common mode input is 0.3V with respect to the
negative supply. As indicated by the common mode rejection specifications the difference is only a few microvolts
between the two methods of offset voltage measurement.
Test Circuit for Offset Voltage and
Offset Drift with Temperature
50k*
4.7V
–
V0
LT1006
100Ω
+
50k*
– 0.3V
*RESISTORS MUST HAVE LOW
THERMOELECTRIC POTENTIAL.
**THIS CIRCUIT IS ALSO USED AS
THE BURN-IN CONFIGURATION,
WITH SUPPLY VOLTAGES
INCREASED TO ± 20V
VO = 1000VOS
LT1006 • TA04
Low Supply Operation
The minimum guaranteed supply voltage for proper
operation of the LT1006 is 2.7V. Typical supply current at
this voltage is 320µA; therefore, power dissipation is only
860µW.
Noise Testing
For application information on noise testing and
calculations, please see the LT1007 or LT1028 data sheet.
Supply Current Programming
Connecting an optional external resistor to Pin 8 changes
the biasing of the LT1006 in order to increase its speed or
to decrease its power consumption. If a higher slew rate is
required, connect the external resistor for Pin 8 to Pin 4
[see performance curves for Increasing Slew Rate
(RSET to V–)]. For lower power consumption, inject a
current into Pin 8 (which is approximately 60mV above
V–) as shown on the Reducing Power Dissipation plot.
This can be accomplished by connecting RSET to the
positive supply, or to save additional power, by obtaining
the injected current from a low voltage battery.
Comparator Applications
The single supply operation of the LT1006 and its ability to
swing close to ground while sinking current lends itself
to use as a precision comparator with TTL compatible
output.
Comparator Rise Response Time
to 10mV, 5mV, 2mV Overdrives
Comparator Fall Response Time
to 10mV, 5mV, 2mV Overdrives
4
4
OUTPUT (V)
OUTPUT (V) 2
0
2
0
0
0
INPUT (mV)
INPUT (mV) –100
–100
0
VS = 5V, 0V
50µs/DIV
1006 TA12a
VS = 5V, 0V
50µs/DIV
1006 TA12b
1006fa
10
LT1006
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TYPICAL APPLICATIO S
Platinum RTD Signal Conditioner
with Curvature Correction
Voltage Controlled Current Source
with Ground Referred Input and Output
+V V = 5.6V TO 10V
5V
INPUT 3
7
+
0V TO 2V
LT1006
2
–
4
39k
1µF
LM334
1.21k*
IK = 100µA
1N457
12k*
5k
400°C
TRIM
43.2k**
0.68µF
5V
+V
10k*
1k
50k
5°C
TRIM
1k**
4
180k
1k**
7
–
8
8
+
RP
1k @
0°C
7
0.02V TO 4V OUT =
2°C TO 400°C
±0.25°C
LT1006
1k**
6
11
4
1µF
1µF
100Ω
12
1.21M*
1µF
RP = ROSEMOUNT 118MF
** = TRW MAR-6 0.1%
* = 1% METAL FILM
14
13
1/2 LTC1043
17
VIN
100Ω
16
0.001µF
LT1006 • TA05
IOUT =
OPERATES FROM A SINGLE 5V SUPPLY
LT1006 • TA06
Micropower 1MHz V/F Converter
9V
LM334
2k*
VOLTAGE
CONTROLLED
CURRENT
SOURCE
9V
3.1k*
200k*
INPUT
0V TO 5V
100Hz
TRIM
220k** TYP
A1
LT1006
2k
–
120k** 20k
TYP 1MHz
TRIM
2µF
* = 1% METAL FILM
** = 1% METAL FILM, SELECTED
8
NC
12k
47k
+
10µF
Q8
2N3906
1
14
0.01µF
3pF
Q3 REFERENCE
Q7
4
0.33µF
Q5
= 2N3904
+
470k
7
Q2
Q1
TRIGGER
1N4148
12
74C90
11
14
÷100
STRAY
CAPACITANCE
1
12
74C90
11
Q4
LT1004-2.5
LT1004-1.2
OUTPUT
0MHz TO 1MHz
1000pF
(POLYSTYRENE)
REFERENCE
SWITCH
Q6
CHARGE PUMP
0.12% LINEARITY
280µA QUIESCENT CURRENT
680µA AT 1MHz
LT1006 • TA07
= 74C14
1006fa
11
LT1006
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TYPICAL APPLICATIO S
Micropower Thermocouple Signal Conditioner with Cold Junction Compensation
4.5V
(3AA CELLS)
100k
R4
233k*
R3
RT
R1
1684*
CATALYST
RESEARCH CORP
MODEL 2736
2.8V
LT1034
1.2V
56k
+
R2
186*
7
8
0V TO 3V OUT =
0°C TO 60°C
±0.75°C
LT1006
1.8k*
–
TYPE J THERMOCOUPLE
4
5.76M*
TOTAL POWER CONSUMPTION ≤ 500µW
* = TRW MAR-6 0.1%
RT = YELLOW SPRINGS INST. CO
MODEL 44007 5k AT 25°C
5.98k*
LT1006 • TA08
Linear Thermometer
5V
5V
10k
5%
16.2k
4
1k
0°C
1/2 LTC1043
7
LT1004
1.235V
3 +
8
2
107k
–
6
0V TO 1.000V =
0°C TO 100.0°C ±0.25°C
4
51.1k
11
1µF
3.2k
7
LT1006
1µF
500Ω
100°C
12
T1
100k
6250Ω
13
16
0.001µF
14
17
T1 = YELLOW SPRINGS #44201
ALL RESISTORS = TRW MAR-6 0.1% UNLESS NOTED
LT1006 • TA09
1006fa
12
LT1006
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TYPICAL APPLICATIO S
±5V Precision Instrumentation Amplifier
5V
4
5V
+
7
3
8
2
–
VOUT
4
–5V
C2
1µF
C1
1µF
(EXTERNAL)
1
LT1006
11
DIFFERENTIAL
INPUT
8
+
1µF
12
R1
13
R2
14
16
CMRR > 120dB AT DC
CMRR > 120dB AT 60Hz
DUAL SUPPLY OR SINGLE 5V
GAIN = 1 + R2/R1
VOS ≈ 150µV
1/2 LTC1043
0.01µF
17
–5V
∆VOS ≈ 2µV/°C
∆T
COMMON MODE INPUT VOLTAGE INCLUDES THE SUPPLIES
LT1006 • TA10
W
W
SCHE ATIC DIAGRA
V+
7
9k
9k
1.6k
Q5
Q6
1.6k
Q13
1.6k 100Ω
Q16
1k
Q14
Q36
Q15 Q32
Q30
Q35
Q4
Q3
Q28
3.9k
Q22
3
–IN
Q2
Q1
Q33
21pF
Q37
Q26
2.5pF
+IN
V–
J1
Q25
Q27
600Ω
Q38
2.4k
18Ω
Q21
6
OUTPUT
400Ω
Q39
Q40
Q41
28k
2
400Ω
Q18
Q12
Q29
4pF
Q7
V
75pF
Q42
Q19
Q34
8
100pF
2.7k 2.7k
–
Q43
2k
Q8
Q11
Q9
Q31
Q10
1
TRIM
2k
5
TRIM
15pF
2k
Q17
Q23 Q24
Q20
2k
1.3k
2k
Q44
30Ω
84k
5.4k
2.5k
4
LT1006 • SD01
1006fa
13
LT1006
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PACKAGE DESCRIPTIO
H Package
8-Lead TO-5 Metal Can (.200 Inch PCD)
(Reference LTC DWG # 05-08-1320)
.335 – .370
(8.509 – 9.398)
DIA
.305 – .335
(7.747 – 8.509)
.040
(1.016)
MAX
.050
(1.270)
MAX
SEATING
PLANE
.165 – .185
(4.191 – 4.699)
GAUGE
PLANE
.010 – .045*
(0.254 – 1.143)
REFERENCE
PLANE
.500 – .750
(12.700 – 19.050)
.016 – .021**
(0.406 – 0.533)
.027 – .045
(0.686 – 1.143)
PIN 1
45°TYP
.028 – .034
(0.711 – 0.864)
.200
(5.080)
TYP
.110 – .160
(2.794 – 4.064)
INSULATING
STANDOFF
*LEAD DIAMETER IS UNCONTROLLED BETWEEN THE REFERENCE PLANE
AND THE SEATING PLANE
.016 – .024
**FOR SOLDER DIP LEAD FINISH, LEAD DIAMETER IS
(0.406 – 0.610) H8(TO-5) 0.200 PCD 0801
J8 Package
8-Lead CERDIP (Narrow .300 Inch, Hermetic)
(Reference LTC DWG # 05-08-1110)
CORNER LEADS OPTION
(4 PLCS)
.023 – .045
(0.584 – 1.143)
HALF LEAD
OPTION
.045 – .068
(1.143 – 1.650)
FULL LEAD
OPTION
.005
(0.127)
MIN
.405
(10.287)
MAX
8
7
6
5
.025
(0.635)
RAD TYP
.220 – .310
(5.588 – 7.874)
1
2
3
.300 BSC
(7.62 BSC)
4
.200
(5.080)
MAX
.015 – .060
(0.381 – 1.524)
.008 – .018
(0.203 – 0.457)
0° – 15°
NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE
OR TIN PLATE LEADS
.045 – .065
(1.143 – 1.651)
.014 – .026
(0.360 – 0.660)
.100
(2.54)
BSC
.125
3.175
MIN
J8 0801
OBSOLETE PACKAGES
1006fa
14
LT1006
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PACKAGE DESCRIPTIO
N8 Package
8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400*
(10.160)
MAX
8
7
6
5
1
2
3
4
.255 ± .015*
(6.477 ± 0.381)
.300 – .325
(7.620 – 8.255)
.008 – .015
(0.203 – 0.381)
+.035
.325 –.015
(
8.255
+0.889
–0.381
)
.045 – .065
(1.143 – 1.651)
.130 ± .005
(3.302 ± 0.127)
.065
(1.651)
TYP
.100
(2.54)
BSC
.120
(3.048) .020
MIN
(0.508)
MIN
.018 ± .003
(0.457 ± 0.076)
N8 1002
NOTE:
1. DIMENSIONS ARE
INCHES
MILLIMETERS
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
1006fa
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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
15
LT1006
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PACKAGE DESCRIPTIO
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 – .197
(4.801 – 5.004)
NOTE 3
.045 ±.005
.050 BSC
8
7
6
5
N
N
.245
MIN
.160 ±.005
1
.030 ±.005
TYP
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
2
3
N/2
N/2
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
× 45°
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
1
.053 – .069
(1.346 – 1.752)
0°– 8° TYP
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
.014 – .019
(0.355 – 0.483)
TYP
INCHES
(MILLIMETERS)
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)
2
3
4
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
SO8 0502
1006fa
16
Linear Technology Corporation
LT/TP 1102 1K REV A • PRINTED IN USA
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 LINEAR TECHNOLOGY CORPORATION 1988