The LT®6003/LT6004/LT6005 are single/dual/quad op amps
designed to maximize battery life and performance for
portable applications. These amplifi ers operate on supplies as low as 1.6V and are fully specifi ed and guaranteed
over temperature on 1.8V, 5V and ±8V supplies while only
drawing 1μA maximum quiescent current.
The ultralow supply current and low operating voltage are
combined with excellent amplifi er specifi cations; input
offset voltage of 500μV maximum with a typical drift of
only 2μV/°C, input bias current of 90pA maximum, open
loop gain of 100,000 and the ability to drive 500pF capacitive loads, making the LT6003/LT6004/LT6005 amplifi ers
ideal when excellent performance is required in battery
powered applications.
The single LT6003 is available in the 5-pin TSOT-23 and tiny
2mm × 2mm DFN packages. The dual LT6004 is available in
the 8-pin MSOP and 3mm × 3mm DFN packages. The quad
LT6005 is available in the 16-pin TSSOP and 5mm × 3mm
DFN packages. These devices are specifi ed over the commercial, industrial and automotive temperature ranges.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
Micropower Oxygen Sensor
10M
1%
100k
1%
100k
OXYGEN SENSOR
CITY TECHNOLOGY
4OX(2)
100
1%
www.citytech.com
1%
LT6003
1.6V
V
I
SUPPLY
600345 TA01a
= 1V IN AIR
OUT
= 0.95µA
Start-Up Characteristics
Supply Current vs Supply Voltage
2.5
AV = 1
= 0.5V
V
CM
2.0
1.5
1.0
0.5
SUPPLY CURRENT PER AMPLIFIER (µA)
0
0.5 0.7 0.9
TOTAL SUPPLY VOLTAGE (V)
TA = 125°C
1.3 1.5 1.7
1.11.9 2.1
TA = 85°C
TA = 25°C
TA = –55°C
600345 TA01b
600345fc
1
LT6003/LT6004/LT6005
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V+ to V–) .................................18V
= 125°C, θJA = 102°C/W (NOTE 2)
EXPOSED PAD (PIN 5) IS V
MUST BE SOLDERED TO PCB
TOP VIEW
1
–
2
+
3
–
V
4
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
= 150°C, θJA = 250°C/W
JMAX
–
,
+
8
V
7
OUT B
–
6
–IN B
+
5
+IN B
OUT A
–IN A
+IN A
+IN B
–IN B
OUT B
16-LEAD (5mm × 3mm) PLASTIC DFN
T
JMAX
EXPOSED PAD (PIN 17) CONNECTED TO V
S5 PACKAGE
5-LEAD PLASTIC TSOT-23
T
= 150°C, θJA = 250°C/W
JMAX
TOP VIEW
1
–
2
A
+
3
+
4
V
5
+
B
–
6
7
8
NC
DHC PACKAGE
= 125°C, θJA = 160°C/W (NOTE 2)
(PCB CONNECTION OPTIONAL)
16
–
15
D
+
14
13
17
12
+
C
–
11
10
9
OUT D
–IN D
+IN D
–
V
+IN C
–IN C
OUT C
NC
–
,
8-LEAD (3mm × 3mm) PLASTIC DFN
T
JMAX
EXPOSED PAD (PIN 9) CONNECTED TO V
OUT A
–IN A
+IN A
+IN B
–IN B
OUT B
DD PACKAGE
= 125°C, θJA = 160°C/W (NOTE 2)
(PCB CONNECTION OPTIONAL)
TOP VIEW
1
–
2
A
+
3
+
4
V
5
+
B
–
6
7
8
NC
GN PACKAGE
16-LEAD PLASTIC TSSOP
T
= 150°C, θJA = 135°C/W
JMAX
16
–
15
D
+
14
13
12
+
C
–
11
10
9
OUT D
–IN D
+IN D
–
V
+IN C
–IN C
OUT C
NC
–
2
600345fc
ORDER INFORMATION
LT6003/LT6004/LT6005
LEAD FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTION
LT6003CDC#PBFLT6003CDC#TRPBFLCKF
LT6003IDC#PBFLT6003IDC#TRPBFLCKF
LT6003HDC#PBFLT6003HDC#TRPBFLCKF
LT6003CS5#PBFLT6003CS5#TRPBFLTCKG5-Lead Plastic TSOT-230°C to 70°C
LT6003IS5#PBFLT6003IS5#TRPBFLTCKG5-Lead Plastic TSOT-23–40°C to 85°C
LT6003HS5#PBFLT6003HS5#TRPBFLTCKG5-Lead Plastic TSOT-23–40°C to 125°C
LT6004CDD#PBFLT6004CDD#TRPBFLCCB
LT6004IDD#PBFLT6004IDD#TRPBFLCCB
LT6004HDD#PBFLT6004HDD#TRPBFLCCB
LT6004CMS8#PBFLT6004CMS8#TRPBFLTCBZ8-Lead Plastic MSOP0°C to 70°C
LT6004IMS8#PBFLT6004IMS8#TRPBFLTCBZ8-Lead Plastic MSOP–40°C to 85°C
LT6004HMS8#PBFLT6004HMS8#TRPBFLTCBZ8-Lead Plastic MSOP–40°C to 125°C
LT6005CDHC#PBFLT6005CDHC#TRPBF6005
LT6005IDHC#PBFLT6005IDHC#TRPBF6005
LT6005HDHC#PBFLT6005HDHC#TRPBF6005
LT6005CGN#PBFLT6005CGN#TRPBF600516-Lead Plastic TSSOP0°C to 70°C
LT6005IGN#PBFLT6005IGN#TRPBF6005I16-Lead Plastic TSSOP–40°C to 85°C
LT6005HGN#PBFLT6005HGN#TRPBF6005H16-Lead Plastic TSSOP–40°C to 125°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
(LT6003C/I, LT6004C/I, LT6005C/I) The l denotes the specifi cations which
ELECTRICAL CHARACTERISTICS
apply over the full operating temperature range, otherwise specifi cations are at T
VCM = 2.5V, V
SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS
V
OS
ΔV
/ΔT
OS
= half supply, RL to ground, unless otherwise noted.
OUT
Input Offset VoltageLT6003S5, LT6004MS8
Input Offset Voltage Drift (Note 5)S5, MS8, GN
0°C ≤ T
≤ 70°C
A
–40°C ≤ T
LT6005GN
0°C ≤ T
–40°C ≤ T
LT6004DD, LT6005DHC
0°C ≤ T
–40°C ≤ T
LT6003DC
0°C ≤ T
–40°C ≤ T
DC, DD, DHC
≤ 85°C
A
≤ 70°C
A
≤ 85°C
A
≤ 70°C
A
≤ 85°C
A
≤ 70°C
A
≤ 85°C
A
= 25°C. VS = 1.8V, 0V, VCM = 0.5V; VS = 5V, 0V,
A
175500
l
l
l
l
l
l
l
l
l
l
190650
290850
290950
2
2
725
950
925
1.15
1.15
1.4
1.3
1.6
5
7
µV
µV
µV
µV
µV
mV
µV
mV
mV
µV
mV
mV
µV/°C
µV/°C
600345fc
3
LT6003/LT6004/LT6005
ELECTRICAL CHARACTERISTICS
(LT6003C/I, LT6004C/I, LT6005C/I) The l denotes the specifi cations which
apply over the full operating temperature range, otherwise specifi cations are at T
VCM = 2.5V, V
SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS
I
B
I
OS
e
n
i
n
R
IN
C
IN
CMRRCommon Mode Rejection Ratio
PSRRPower Supply Rejection RatioV
A
VOL
V
OL
V
OH
I
SC
I
S
= half supply, RL to ground, unless otherwise noted.
OUT
Input Bias Current (Note 7)VCM = 0.3V, 0°C ≤ TA ≤ 70°C
V
= V+ – 0.3V, 0°C ≤ TA ≤ 70°C
CM
V
= 0.3V, –40°C ≤ TA ≤ 85°C
CM
V
= V+ – 0.3V, –40°C ≤ TA ≤ 85°C
CM
V
= 0V
CM
Input Offset Current (Note 7)VCM = 0.3V
V
= V+ – 0.3V
CM
V
= 0V
CM
Input Noise Voltage0.1Hz to 10Hz3µV
Input Noise Voltage Densityf = 100Hz325nV/√Hz
Input Noise Current Densityf = 100Hz12fA/√Hz
Input ResistanceDifferential
Common Mode
Input Capacitance6pF
= 1.8V
V
S
V
(Note 7)
Input Offset Voltage Shift (Note 7)V
= 0V to 0.7V
CM
V
= 0V to 1.8V, S5, MS8, GN
CM
V
= 0V to 1.8V, DC, DD, DHC
CM
V
= 5V
S
V
= 0V to 3.9V
CM
V
= 0V to 5V, S5, MS8, GN
CM
V
= 0V to 5V, DC, DD, DHC
CM
= 0V to V+ – 1.1V
CM
V
= 0V to V+, S5, MS8, GN
CM
V
= 0V to V+, DC, DD, DHC
CM
Input Voltage RangeGuaranteed by CMRR
= 1.6V to 6V, VCM = 0.5V, 0°C ≤ TA ≤ 70°C
S
V
= 1.7V to 6V, VCM = 0.5V, –40°C ≤ TA ≤ 85°C
S
Minimum Supply VoltageGuaranteed by PSRR, 0°C ≤ TA ≤ 70°C
Large Signal Voltage Gain
(Note 7)
–40°C ≤ T
VS = 1.8V
R
L
≤ 85°C
A
= 20kΩ, V
= 0.25V to 1.25V
OUT
VS = 5V
R
= 20kΩ, V
L
= 0.25V to 4.25V
OUT
Output Swing Low (Notes 6, 8)No Load
I
= 100μA
SINK
Output Swing High (Notes 6, 9)No Load
I
= 100μA
SOURCE
Short Circuit Current (Note 8)Short to GND
0°C ≤ TA ≤ 70°C
–40°C ≤ T
Short to V
≤ 85°C
A
+
0°C ≤ TA ≤ 70°C
–40°C ≤ T
≤ 85°C
A
Supply Current per Amplifi erVS = 1.8V
0°C ≤ T
≤ 70°C
A
–40°C ≤ T
V
S
0°C ≤ T
= 5V
≤ 85°C
A
≤ 70°C
A
–40°C ≤ TA ≤ 85°C
= 25°C. VS = 1.8V, 0V, VCM = 0.5V; VS = 5V, 0V,
A
l
l
l
l
l
l
l
l
5
40
5
40
0.13
5
7
5
90
140
120
170
1.4
80
80
100
10
2000
l
73
l
63
l
60
l
88
l
72
l
69
l
l
l
l
0V
l
80
l
78
l
1.6
l
1.7
25
l
15
100
l
60
l
l
l
l
2
l
1.5
l
0.5
2
l
1.5
l
0.5
100
80
78
115
90
86
7
0.16
0.23
155
1.3
1.8
+
95
95
150V/mV
500V/mV
15
110
45
200
50
240
100
350
5mA
7mA
0.851
l
l
1.4
1.6
11.2
l
l
1.6
1.9
pA
pA
pA
pA
nA
pA
pA
pA
P-P
GΩ
GΩ
dB
dB
dB
dB
dB
dB
µV
mV
mV
dB
dB
V/mV
V/mV
mV
mV
mV
mV
mA
mA
mA
mA
µA
µA
µA
µA
µA
µA
600345fc
V
V
V
4
LT6003/LT6004/LT6005
ELECTRICAL CHARACTERISTICS
(LT6003C/I, LT6004C/I, LT6005C/I) The l denotes the specifi cations which
apply over the full operating temperature range, otherwise specifi cations are at T
VCM = 2.5V, V
= half supply, RL to ground, unless otherwise noted.
OUT
= –1, RF = RG = 1MΩ
A
V
0°C ≤ T
≤ 70°C
A
–40°C ≤ T
OUT
A
= 1.5V
≤ 85°C
(Note 10)170Hz
P-P
(LT6003H, LT6004H, LT6005H) The l denotes the specifi cations which apply over the full specifi ed temperature range of –40°C ≤ TA ≤ 125°C.
VS = 1.8V, 0V, VCM = 0.5V; VS = 5V, 0V, VCM = 2.5V, V
Minimum SupplyGuaranteed by PSRR
Large Signal Voltage Gain (Note 7)
V
V
Output Swing Low (Notes 6, 8)No Load
I
SINK
Output Swing High (Notes 6, 9)No Load
I
SOURCE
Short Circuit Current (Note 8)Short to GND
Short to V
Supply Current per Amplifi erVS = 1.8V
V
A
= half supply, RL to ground, unless otherwise noted.
OUT
= 0.3V, V+ – 0.3V
CM
= 0.3V, V+ – 0.3V
CM
= 1.8V
S
= 0.3V to 0.7V
CM
= 0.3V to 1.5V, S5, MS8, GN
CM
= 0.3V to 1.5V, DC, DD, DHC
CM
= 5V
S
= 0.3V to 3.9V
CM
= 0.3V to 4.7V, S5, MS8, GN
CM
= 0.3V to 4.7V, DC, DD, DHC
CM
= 0.3V to V+ – 1.1V
CM
= 0.3V to V+ – 0.3V, S5, MS8, GN
CM
= 1.7V to 6V, VCM = 0.5V
S
= 1.8V, RL = 20kΩ, V
S
= 5V, RL = 20kΩ, V
S
= 0.4V to 1.25V
OUT
= 0.4V to 4.25V
OUT
= 100µA
= 100µA
+
= 5V
S
= –1, RF = RG = 1MΩ
V
= 25°C. VS = 1.8V, 0V, VCM = 0.5V; VS = 5V, 0V,
A
0.55
l
0.4
l
0.2
l
l
l
0.8V/ms
1.5
1.7
1.9
2.1
l
l
l
l
l
l
l
67
l
57
l
55
l
86
l
68
l
66
l
l
l
l
0.3V+ – 0.3VV
l
76dB
l
1.7V
l
l
l
l
l
l
l
l
l
l
l
4V/mV
20V/mV
0.5mA
0.5mA
0.2V/ms
2
3
6
8
6
12
2
4
180
1.7
2.2
60
275
120
400
2.2
2.5
V/ms
V/ms
mV
mV
mV
mV
µV/°C
µV/°C
nA
nA
nA
nA
dB
dB
dB
dB
dB
dB
µV
mV
mV
mV
mV
mV
mV
µA
µA
600345fc
5
LT6003/LT6004/LT6005
ELECTRICAL CHARACTERISTICS
(LT6003C/I, LT6004C/I, LT6005C/I) The l denotes the specifi cations which
apply over the full operating temperature range, otherwise specifi cations are at T
Input Noise Voltage0.1Hz to 10Hz3µV
Input Noise Voltage Densityf = 100Hz325nV/√Hz
Input Noise Current Densityf = 100Hz12fA/√Hz
Input ResistanceDifferential
Common Mode
Input Capacitance6pF
= –8V to 6.9V
CM
V
= –8V to 8V, S5, MS8, GN
CM
V
= –8V to 8V, DC, DD, DHC
CM
Input Offset Voltage ShiftV
= –8V to 6.9V
CM
V
= –8V to 8V, S5, MS8, GN
CM
V
= –8V to 8V, DC, DD, DHC
CM
Input Voltage RangeGuaranteed by CMRR
= ±1.1V to ±8V
S
Large Signal Voltage Gain
R
= 100kΩ, V
L
= –7.3V to 7.3V
OUT
Output Swing Low (Notes 6, 8)No Load
I
= 100μA
SINK
Output Swing High (Notes 6, 9)No Load
I
= 100μA
SOURCE
Short Circuit CurrentShort to GND
0°C ≤ T
≤ 70°C
A
–40°C ≤ T
≤ 85°C
A
l
92
l
82
l
78
l
l
l
l
–88V
l
86105dB
l
l
l
l
4
l
l
3
1
Supply Current per Amplifi er
0°C ≤ T
≤ 70°C
A
–40°C ≤ T
A
V
0°C ≤ T
≤ 85°C
A
= –1, RF = RG = 1MΩ
≤ 70°C
A
–40°C ≤ TA ≤ 85°C
OUT
= 14V
(Note 10)30Hz
P-P
l
l
0.55
0.4
l
0.2
l
= half supply, RL to
OUT
185600
825
1.05
200750
1.05
1.25
300950
1.25
1.5
0.31.05
1.4
1.65
2
2
7
7
5
7
100
150
µV
µV
mV
µV
mV
mV
µV
mV
mV
mV
mV
mV
µV/°C
µV/°C
pA
pA
790 pA
P-P
10
2000
120
100
96
15
0.16
0.25
375
1.3
2
GΩ
GΩ
dB
dB
dB
µV
mV
mV
350V/mV
10
105
50
195
50
240
120
350
mV
mV
mV
mV
9mA
mA
mA
1.251.5
1.9
2.2
µA
µA
µA
1.3V/ms
V/ms
V/ms
6
600345fc
LT6003/LT6004/LT6005
ELECTRICAL CHARACTERISTICS
(LT6003H, LT6004H, LT6005H) The l denotes the specifi cations which apply
over the full specifi ed temperature range of –40°C ≤ T
≤ 125°C. VS = ±8V, VCM = V
A
noted.
SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS
V
OS
ΔV
OS
I
B
I
OS
CMRRCommon Mode Rejection RatioV
PSRRPower Supply Rejection RatioV
V
OL
V
OH
I
SC
I
S
SRSlew Rate (Note 11)
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: A heat sink may be required to keep the junction temperature
below absolute maximum. This depends on the power supply voltage and
how many amplifi ers are shorted. The θ
DHC packages is with minimal PCB heat spreading metal. Using expanded
metal area on all layers of a board reduces this value.
Note 3: The LT6003C/LT6004C/LT6005C and LT6003I/LT6004I/LT6005I are
guaranteed functional over the temperature range of –40°C to 85°C. The
LT6003H/LT6004H/LT6005H are guaranteed functional over the operating
temperature range of –40°C to 125°C.
Note 4: The LT6003C/LT6004C/LT6005C are guaranteed to meet specifi ed
performance from 0°C to 70°C. The LT6003C/LT6004C/LT6005C are
designed, characterized and expected to meet specifi ed performance from
Input Offset VoltageLT6003S5, LT6004MS8
LT6005GN
LT6004DD, LT6005DHC
LT6003DC
Input Offset Voltage Drift (Note 5)S5, MS8, GN
/ΔT
DC, DD, DHC
Input Bias CurrentLT6003
LT6004, LT6005
Input Offset CurrentLT6003
LT6004, LT6005
= –7.7V to 6.9V
CM
V
= –7.7V to 7.7V, S5, MS8, GN
CM
V
= –7.7V to 7.7V, DC, DD, DHC
CM
Input Offset Voltage ShiftV
= –7.7V to 6.9V
CM
V
= –7.7V to 7.7V, S5, MS8, GN
CM
V
= –7.7V to 7.7V, DC, DD, DHC
CM
Input Voltage RangeGuaranteed by CMRR
= ±1.1V to ±8V
S
Output Swing Low (Notes 6, 8)No Load
I
= 100µA
SINK
Output Swing High (Note 6)No Load
I
SOURCE
Short Circuit CurrentShort to GND
Supply Current per Amplifi er
= –1, RF = RG = 1MΩ
A
V
specifi ed for the DC, DD and
JA
= 100µA
–40°C to 85°C but are not tested or QA sampled at these temperatures.
The LT6003I/LT6004I/LT6005I are guaranteed to meet specifi ed
performance from –40°C to 85°C. The LT6003H/LT6004H/LT6005H are
guaranteed to meet specifi ed performance from –40°C to 125°C.
Note 5: This parameter is not 100% tested.
Note 6: Output voltage swings are measured between the output and
power supply rails.
Note 7: Limits are guaranteed by correlation to V
Note 8: Limits are guaranteed by correlation to V
Note 9: Limits are guaranteed by correlation to V
Note 10: Full-power bandwidth is calculated from the slew rate:
FPBW = SR/πV
Note 11: Slew rate measured at V
guarantee by correlation the slew rate at V
slew rate at V
= half supply, RL to ground, unless otherwise
OUT
= ±8V, V
S
P-P
.
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
= –5V to 5V.
OUT
2
3
90
78
76
–7.77.7V
84dB
1mA
0.2V/ms
= 1.8V, V
S
= 0.4V to 1.4V is used to
OUT
= 5V, V
S
1.6
1.8
2
2.2
6
8
6
12
2
4
460
1.9
2.5
60
275
140
400
3µA
= 5V tests.
S
= 1.8V tests
S
= ±8V tests
S
= 1V to 4V and the
OUT
mV
mV
mV
mV
µV/°C
µV/°C
nA
nA
nA
nA
dB
dB
dB
µV
mV
mV
mV
mV
mV
mV
600345fc
7
LT6003/LT6004/LT6005
TYPICAL PERFORMANCE CHARACTERISTICS
VOS DistributionTC VOS DistributionSupply Current vs Supply Voltage
35
VS = 5V, 0V
= 2.5V
V
CM
30
MS8 PACKAGE
1377 AMPLIFIERS
25
20
15
10
PERCENT OF UNITS (%)
5
0
–400 –2000200400
INPUT OFFSET VOLTAGE (µV)
600345 G01
20
18
16
14
12
10
8
6
PERCENT OF UNITS (%)
4
2
0
–5
600–600
–3–4–1–21 2405
DISTRIBUTION (µV/°C)
VS = 5V, 0V
= 2.5V
V
CM
MS8, GN16,
SOT23 PACKAGES
–40°C TO 85°C
3
600345 G02
5.0
VCM = 0.5V
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
SUPPLY CURRENT PER AMPLIFIER (µA)
0
0
2410 12 14
TA = 125°C
TA = 85°C
TA = 25°C
TA = –55°C
SUPPLY VOLTAGE (V)
1668
600345 G03
Change in Input Offset Voltage
vs Total Supply Voltage
250
200
150
CHANGE IN OFFSET VOLTAGE (µV)
–100
100
50
–50
TA = 25°C
0
1
TA = –55°C
TA = 125°C
1.52.02.5
TOTAL SUPPLY VOLTAGE (V)
Input Bias Current
vs Common Mode Voltage
3.0
VS = 5V, 0V
2.5
2.0
1.5
1.0
0.1
0
–0.1
INPUT BIAS CURRENT (nA)
–0.2
–0.3
–0.4
0
COMMON MODE VOLTAGE (V)
TA = 125°C
TA = 85°C
TA = –55°C
25134
600345 G04
TA = 25°C
600345 G07
3.0
Input Offset Voltage
vs Total Supply Voltage
300
200
100
0
–100
–200
OFFSET VOTLAGE (µV)
–300
–400
0
TOTAL SUPPLY VOLTAGE (V)
824166
Output Saturation Voltage
vs Load Current (Output High)
1.0
VS = 5V, 0V
INPUT OVERDRIVE = 30mV
0.1
OUTPUT HIGH SATURATION VOLTAGE (V)
0.01
0.00001 0.001
TA = 125°C
TA = –55°C
SOURCING LOAD CURRENT (mA)
VCM = 0.5V
TYPICAL PART
TA = 25°C
TA = –55°C
TA = 125°C
101412
60012 G05
TA = 25°C
0.110
600345 G08
Input Offset Voltage
vs Input Common Mode Voltage
100
–100
–150
–200
INPUT OFFSET VOLTAGE (µV)
–250
–300
50
0
–50
1234
INPUT COMMON MODE VOLTAGE (V)
TA = 25°C
TA = –55°C
TA = 125°C
VS = 5V, 0V
TYPICAL PART
Output Saturation Voltage
vs Load Current (Output Low)
1.0
VS = 5V, 0V
INPUT OVERDRIVE = 30mV
0.1
0.01
OUTPUT LOW SATURATION VOLTAGE (V)
0.001
0.00001 0.0010.110
TA = 125°C
TA = –55°C
TA = 25°C
SINKING LOAD CURRENT (mA)
50.501.52.53.54.5
600345 G06
600345 G09
8
600345fc
TYPICAL PERFORMANCE CHARACTERISTICS
LT6003/LT6004/LT6005
Output Saturation Voltage
vs Input Overdrive
100
90
80
70
60
50
40
30
20
OUTPUT SATURATION VOLTAGE (mV)
10
0
0
OUTPUT HIGH
OUTPUT LOW
5101520
INPUT OVERDRIVE (mV)
VS = ±2.5V
NO LOAD
25
600345 G10
30
Output Short-Circuit Current vs
Total Supply Voltage (Sourcing)
14
VCM = 0.5V
OUTPUT SHORTED TO V
12
10
OUTPUT SHORT-CIRCUIT CURRENT (mA)
TA = 125°C
8
6
4
2
0
01
TOTAL SUPPLY VOLTAGE (V)
–
TA = 25°C
TA = –55°C
235
4
600345 G11
Output Short-Circuit Current vs
Total Supply Voltage (Sinking)
14
VCM = 0.5V
OUTPUT SHORTED TO V
12
TA = 125°C
10
8
6
4
2
OUTPUT SHORT-CIRCIUT CURRENT (mA)
0
01
235
TOTAL SUPPLY VOLTAGE (V)
0.1Hz to 10Hz Voltage NoiseVoltage Noise vs FrequencyCurrent Noise vs Frequency
VS = ±2.5V
= 25°C
T
A
450
400
350
300
VS = 5V, 0V
= 25°C
T
A
VCM = 4.5V
VCM = 2.5V
100
10
VS = 5V, 0V
= 25°C
T
A
VCM = 2.5V
+
TA = 25°C
TA = –55°C
4
600345 G12
VCM = 4.5V
VOLTAGE NOISE (1µV/DIV)
2468
TIME (SECONDS)
600345 G13
10103579
250
INPUT VOLTAGE NOISE (nV/√Hz)
200
1
10100
FREQUENCY (Hz)
600345 G14
CURRENT NOISE (fA/√Hz)
1
1
101000100
FREQUENCY (Hz)
600345 G15
600345fc
9
LT6003/LT6004/LT6005
TYPICAL PERFORMANCE CHARACTERISTICS
Open-Loop GainOpen-Loop GainOpen-Loop Gain
60
40
RL = 1M
20
RL = 100k
0
RL = 20k
–20
CHANGE IN INPUT OFFSET VOLTAGE (µV)
–40
0
0.30.60.91.2
OUTPUT VOLTAGE (V)
VS = 1.8V, 0V
= 0.5V
V
CM
= 25°C
T
A
1.51.8
600345 G16
40
30
20
10
0
–10
–20
–30
CHANGE IN INPUT OFFSET VOLTAGE (µV)
–40
RL = 100k
RL = 1M
RL = 20k
0
123
OUTPUT VOLTAGE (V)
VS = 5V, 0V
= 0.5V
V
CM
= 25°C
T
A
4
600345 G17
Gain Bandwidth and Phase
Margin vs Total Supply VoltageSlew Rate vs TemperatureGain and Phase vs Frequency
PHASE
5
4
GAIN
3
GAIN BANDWIDTH (kHz)
2
1
0
–55°C
0246810161412
TOTAL SUPPLY VOLTAGE (V)
125°C
–55°C
25°C
125°C, VCM = V+ – 0.5V
125°C
25°C
f = 100Hz (GBW)
V
CM
EXCEPT WHERE NOTED
60
55
50
45
40
= HALF SUPPLY
600345 G19
3.0
AV = –1
= RG = 1M
R
F
2.5
PHASE MARGIN (DEG)
2.0
1.5
1.0
SLEW RATE (V/ms)
0.5
V
0
–50
–25050100 125
RISING
= 1.8V, 0V
S
FALLING
= 1.8V, 0V
V
S
2575
TEMPERATURE (°C)
= 5V, 0V
V
S
RISING
FALLING
= 5V, 0V
V
S
600345 G20
120
100
80
RL = 20k
60
40
RL = 100k
20
0
–20
–40
–60
–80
CHANGE IN INPUT OFFSET VOLTAGE (µV)
– 100
5
–8
60
40
GAIN (dB)
20
0
–20
0.010.1110
RL = 1M
–4284–6–20
OUTPUT VOLTAGE (V)
PHASE
VCM = 2.5V
VCM = 4.5V
GAIN
VCM = 4.5V
FREQUENCY (kHz)
VS = ±8V
= 25°C
T
A
6
600345 G18
VCM = 2.5V
VS = 5V, 0V
= –1
A
V
= RG = 1M
R
F
600345 G21
120
80
40
PHASE (DEG)
0
10
600345fc
TYPICAL PERFORMANCE CHARACTERISTICS
LT6003/LT6004/LT6005
Capacitive Load Handling
Overshoot vs Capacitive Load
45
= 1.8V, 0V
V
S
= 0.5V
V
40
CM
= 1M
R
L
35
30
25
20
OVERSHOOT (%)
15
10
5
0
10
AV = 1
AV = 2
100100010000
CAPACITIVE LOAD (pF)
AV = 5
600345 G22
Common Mode Rejection Ratio
vs Frequency
120
100
80
60
40
20
COMMON MODE REJECTION RATIO (dB)
0
0.01
0.1110
FREQUENCY (kHz)
Power Supply Rejection Ratio
vs FrequencyOutput Impedance vs Frequency
100
90
80
70
60
NEGATIVE
50
SUPPLY
40
30
20
10
POWER SUPPLY REJECTION RATIO (dB)
0
0.01
POSITIVE
SUPPLY
0.1110
FREQUENCY (kHz)
VS = ±2.5V
= 25°C
T
A
600345 G24
100
VS = ±2.5V
= 25°C
T
A
AV = 10
10
1
OUTPUT IMPEDANCE (k)
0.1
0.01
0.1110
FREQUENCY (kHz)
AV = 1
VS = ±2.5V
= 25°C
T
A
600345 G23
600345 G25
600345fc
11
LT6003/LT6004/LT6005
TYPICAL PERFORMANCE CHARACTERISTICS
4.5V
0.5V
200mV/DIV
Large-Signal Response
= 5V, 0V
V
S
= 100pF
C
L
= 100k
R
L
1ms/DIVAV = 1
Small-Signal Response
600345 G26
Large-Signal Response
1.5V
0.25V
= 1.8V, 0V
V
S
= 100pF
C
L
R
= 100k
L
1ms/DIVAV = 1
Output Saturation Recovery
V
IN
2V/DIV
600345 G2
AV = 1
= p2.5V
V
S
= 50pF
C
L
= 1M
R
L
200µs/DIV
600345 G28
V
OUT
AV = –1
= p2.5V
V
S
= RG = 1M
R
F
5ms/DIV
600345 G29
12
600345fc
SIMPLIFIED SCHEMATIC
Q1
+
+IN
–IN
V
R2
600k
+
V
D3
R3
600k
R1
Q7
LT6003/LT6004/LT6005
+
V
R4
Q3
Q4
R5
Q2
Q10
Q6
Q5
Q12
Q11
C1
Q13
COMPLEMENTARY
DRIVE GENERATOR
Q14
CM
OUT
Q8Q16Q17
R6R7
Q9
600345 F01
Q15
–
V
Figure 1
600345fc
13
LT6003/LT6004/LT6005
APPLICATIONS INFORMATION
Supply Voltage
The positive supply of the LT6003/LT6004/LT6005 should
be bypassed with a small capacitor (about 0.01μF) within
an inch of the pin. When driving heavy loads, an additional
4.7μF electrolytic capacitor should be used. When using split
supplies, the same is true for the negative supply pin.
Rail-to-Rail Characteristics
The LT6003/LT6004/LT6005 are fully functional for an input
signal range from the negative supply to the positive supply. Figure 1 shows a simplifi ed schematic of the amplifi er.
The input stage consists of two differential amplifi ers, a
PNP stage Q3/Q6 and an NPN stage Q4/ Q5 that are active
over different ranges of the input common mode voltage.
The PNP stage is active for common mode voltages,
, between the negative supply to approximately 0.9V
V
CM
below the positive supply. As V
moves closer towards
CM
the positive supply, the transistor Q7 will steer Q2’s tail
current to the current mirror Q8/Q9, activating the NPN
differential pair. The PNP pair becomes inactive for the
rest of the input common mode voltage range up to the
positive supply.
The second stage is a folded cascode and current mirror that converts the input stage differential signals into
a single ended output. Capacitor C1 reduces the unity
cross frequency and improves the frequency stability
without degrading the gain bandwidth of the amplifi er.
The complementary drive generator supplies current to
the output transistors that swing from rail to rail.
Input
Input bias current (I
) is minimized with cancellation
B
circuitry on both input stages. The cancellation circuitry
remains active when V
rail. As V
off and I
approaches V– the cancellation circuitry turns
CM
is determined by the tail current of Q2 and the
B
is more than 300mV from either
CM
beta of the PNP input transistors. As V
devices in the cancellation circuitry saturate causing I
approaches V+
CM
B
to
increase (in the nanoamp range). Input offset voltage errors
due to I
can be minimized by equalizing the noninverting
B
and inverting source impedances.
The input offset voltage changes depending on which input
stage is active; input offset voltage is trimmed on both
input stages, and is guaranteed to be 500μV max in the
PNP stage. By trimming the input offset voltage of both
input stages, the input offset voltage shift over the entire
common mode range (CMRR) is typically 160μV, maintaining the precision characteristics of the amplifi er.
The input stage of the LT6003/LT6004/LT6005 incorporates phase reversal protection to prevent wrong polarity
outputs from occurring when the inputs are driven up to
9V below the negative rail. 600k protective resistors are
included in the input leads so that current does not become
–
excessive when the inputs are forced below V
or when
a large differential signal is applied. Input current should
be limited to 10mA when the inputs are driven above the
positive rail.
Output
The output of the LT6003/LT6004/LT6005 is guaranteed to
swing within 100mV of the positive rail and 50mV of the
negative rail with no load, over the industrial temperature
range. The LT6003/LT6004/LT6005 can typically source
8mA on a single 5V supply. Sourcing current is reduced
to 5mA on a single 1.8V supply as noted in the electrical
characteristics. However, when sourcing more than 250A
with an output load impedance greater than 20kΩ, a 1μF
capacitor in series with a 2k resistor should be placed
from the output to ground to insure stability.
The normally reverse-biased substrate diode from the
–
output to V
the output is forced below V
will cause unlimited currents to fl ow when
–
. If the current is transient
and limited to 100mA, no damage will occur.
14
600345fc
APPLICATIONS INFORMATION
LT6003/LT6004/LT6005
Gain
The open-loop gain is almost independent of load when
the output is sourcing current. This optimizes performance
in single supply applications where the load is returned to
ground. The Typical Performance Characteristics curve of
Open-Loop Gain for various loads shows the details.
Start-Up and Output Saturation Characteristics
Micropower op amps are often not micropower during
start-up or during output saturation. This can wreak havoc
on limited current supplies. In the worst case there may
not be enough supply current available to take the system
up to nominal voltages. Unlike the LT6003/LT6004/LT6005,
when the output saturates, some op amps may draw
excessive current and pull down the supplies, compromising rail-to-rail performance. Figure 2 shows the start-up
characteristics of the LT6003/LT6004/LT6005 for three
limiting cases. The circuits are shown in Figure 3. One
circuit creates a positive offset forcing the output to come
up saturated high. Another circuit creates a negative offset
forcing the output to come up saturated low, while the last
circuit brings the output up at 1/2 supply. In all cases, the
supply current is well controlled and is not excessive when
the output is on either rail.
1.2
TA = 25°C
1.0
0.8
0.6
0.4
0.2
SUPPLY CURRENT PER AMPLIFIER (µA)
0
OUTPUT AT VS/2
0
10.521.53 3.54.52.55
SUPPLY VOLTAGE (V)
OUTPUT HIGH
OUTPUT LOW
4
600345 F02
V
S
+
–
Output Low
VS/2
Output at VS/2
V
S
+
–
600345 F03
30mV
V
S
+
–
Output High
Figure 3. Circuits for Start-Up Characteristics
30mV
Adaptive Filter
The circuit of Figure 4 shows the LT6005 applied as a
micropower adaptive fi lter, which automatically adjusts
the time constant depending on the signal level. Op amp
A1 buffers the input onto the RC which has either a 1ms
or 20ms time constant depending on the state of switch
S1. The signal is then buffered to the output by op amp
A2. Op amps A3 and A4 are confi gured as gain-of-40
difference amplifi ers, gaining up the difference between
the buffered input voltage and the output. When there is
no difference, the outputs of A3 and A4 will be near zero.
When a positive signal step is applied to the input, the
output of A3 rises. When a negative signal step is applied
to the input, the output of A4 rises. These voltages are fed
to the LT6700-2 comparator which has a built in 400mV
reference. If the input step exceeds 10mV, the output
of the difference amplifi ers will exceed 400mV and the
comparator output (wired in OR gate fashion) falls low.
This turns on S1, reducing the time constant and speeding up the settling. The overall effect is that the circuit
provides “slow fi ltering” with “fast settling.” Waveforms
for a 100mV input step are shown in the accompanying
photo. The fast 1ms time constant is obvious in the output
waveform, while the slow time constant is discernible as
the slow ramping sections. That the slow time constant
is discernible at all is due to delay time in the difference
amplifi er and comparator functions.
Figure 2. Start-Up Characteristics
600345fc
15
LT6003/LT6004/LT6005
APPLICATIONS INFORMATION
10M
V
249k
249k
–
A1
1/4 LT6005
+
V
IN
ADAPTIVE FILTER IMPROVES INHERENT TRADE-OFF OF SETTLING TIME VS NOISE FILTERING. SMALL SIGNAL DC STEPS
SETTLE WITH A 20ms TIME CONSTANT FOR AN 8Hz NOISE BANDWIDTH. LARGE STEP SIGNALS (>10mV) CAUSE S1 TO
TURN ON, SPEEDING UP THE TIME CONSTANT TO 1ms, FOR IMPROVED SETTLING. AS THE OUTPUT SETTLES BACK TO
WITHIN 10mV, 51 TURNS OFF AGAIN, RESTORING THE 20ms TIME CONSTANT, FOR IMPROVED FILTERING.
CC
–
A3
1/4 LT6005
+
10M
V
CC
1M
V
CC
–
INB–INA
V
S
LT6700-2
OUTB OUTA
10k
200k
GND
COMP
S
S1
10M
249k
–
A4
1/4 LT6005
10M
OUT
BA
0.1µF
–
1/4 LT6005
+
249k
+
A2
S1: FAIRCHILD FSA1157
= 1.8V TO 5V
V
CC
= 10µA, RISING TO 20µA
I
CC
WITH LARGE SIGNAL
V
OUT
600345 F04
Figure 4. Adaptive Filter
V
100mV/DIV
V
OUT
50mV/DIV
COMP
OUT
5V/DIV
IN
2ms/DIV
600345 F04b
V
S
R2
390k
R1
1M
+
V
LT6003
S
LT1389-1.25
–
I
LOAD
LOAD
S
= V
=
LOAD
600345 F05
1.25V
R1
+ 2V
V
LOAD
LOAD
I
V
Figure 5. Precision 1.25μA Current Source
16
600345fc
PACKAGE DESCRIPTION
1.30 p0.05
2.00 p0.05
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDEDED
PIN 1 BAR
TOP MARK
(SEE NOTE 6)
0.200 REF
NOTE:
1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. 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
LT6003/LT6004/LT6005
DC Package
4-Lead Plastic DFN (2mm × 2mm)
(Reference LTC DWG # 05-08-1724 Rev B)
1.35 p0.05
1.00 p0.05
PACKAGE
OUTLINE
0.25 p 0.05
1.35 REF
0.45 BSC
2.00 p0.10
(4 SIDES)
0.75 p0.05
0.00 – 0.05
R = 0.115
TYP
1.00 p 0.10
0.40 p0.10
0.70 p0.05
4
BOTTOM VIEW—EXPOSED PAD
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1
LOCATION ON THE TOP AND BOTTOM OF PACKAGE
1.35 p 0.10
1.35 REF
1
0.23 p 0.05
0.45 BSC
(DC4) DFN 0309 REV B
R = 0.05
TYP
PIN 1 NOTCH
R = 0.20 OR
0.25 s 45o
CHAMFER
0.62
MAX
3.85 MAX
2.62 REF
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.20 BSC
DATUM ‘A’
0.30 – 0.50 REF
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
S5 Package
5-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1635)
0.95
REF
1.22 REF
1.50 – 1.75
0.09 – 0.20
(NOTE 3)
2.80 BSC
(NOTE 4)
PIN ONE
0.95 BSC
0.80 – 0.90
1.00 MAX
1.4 MIN
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
2.90 BSC
(NOTE 4)
1.90 BSC
0.30 – 0.45 TYP
5 PLCS (NOTE 3)
0.01 – 0.10
S5 TSOT-23 0302 REV B
600345fc
17
LT6003/LT6004/LT6005
PACKAGE DESCRIPTION
0.675 p0.05
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
R = 0.115
TYP
0.38 p 0.10
85
3.5 p0.05
2.15 p0.05
NOTE:
1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1)
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
4. 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
1.65 p0.05
(2 SIDES)
PACKAGE
OUTLINE
0.25 p 0.05
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
2.38 p0.05
(2 SIDES)
0.50
BSC
PIN 1
TOP MARK
(NOTE 6)
0.200 REF
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660 Rev F)
0.889
p 0.127
(.035 p .005)
MS8 Package
3.00 p0.10
(4 SIDES)
0.75 p0.05
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
3.00 p 0.102
(.118 p .004)
(NOTE 3)
1.65 p 0.10
0.00 – 0.05
(2 SIDES)
0.25 p 0.05
BOTTOM VIEW—EXPOSED PAD
8
7
6
5
2.38 p0.10
(2 SIDES)
0.52
(.0205)
REF
14
0.50 BSC
(DD) DFN 1203
0.42 p 0.038
(.0165 p .0015)
TYP
18
5.23
(.206)
MIN
RECOMMENDED SOLDER PAD LAYOUT
3.20 – 3.45
(.126 – .136)
0.65
(.0256)
BSC
0.254
(.010)
GAUGE PLANE
0.18
(.007)
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
DETAIL “A”
DETAIL “A”
o – 6o TYP
0
0.53 p 0.152
(.021 p .006)
SEATING
PLANE
4.90
p 0.152
(.193 p .006)
(.043)
0.22 – 0.38
(.009 – .015)
TYP
1.10
MAX
12
0.65
(.0256)
BSC
4
3
3.00 p 0.102
(.118 p .004)
(NOTE 4)
0.86
(.034)
REF
0.1016 p 0.0508
(.004 p .002)
MSOP (MS8) 0307 REV F
600345fc
PACKAGE DESCRIPTION
3.50 ±0.05
1.65 ±0.05
(2 SIDES)
2.20 ±0.05
0.25 ± 0.05
0.50 BSC
4.40 ±0.05
(2 SIDES)
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
NOTE:
1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WJED-1) IN JEDEC
PACKAGE OUTLINE MO-229
2. DRAWING NOT TO SCALE
3. ALL DIMENSIONS ARE IN MILLIMETERS
DHC Package
16-Lead Plastic DFN (5mm × 3mm)
(Reference LTC DWG # 05-08-1706)
5.00 ±0.10
(2 SIDES)
0.65 ±0.05
PACKAGE
OUTLINE
PIN 1
TOP MARK
(SEE NOTE 6)
0.200 REF
4. 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
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE
TOP AND BOTTOM OF PACKAGE
LT6003/LT6004/LT6005
3.00 ±0.10
(2 SIDES)
0.75 ±0.05
R = 0.20
1.65 ± 0.10
(2 SIDES)
0.00 – 0.05
TYP
R = 0.115
TYP
4.40 ±0.10
(2 SIDES)
BOTTOM VIEW—EXPOSED PAD
0.25 ± 0.05
0.50 BSC
169
18
0.40 ± 0.10
PIN 1
NOTCH
(DHC16) DFN 1103
.015
± .004
(0.38 ± 0.10)
.007 – .0098
(0.178 – 0.249)
NOTE:
1. CONTROLLING DIMENSION: INCHES
2. DIMENSIONS ARE IN
× 45°
.016 – .050
(0.406 – 1.270)
INCHES
(MILLIMETERS)
GN Package
16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.0532 – .0688
0° – 8°
TYP
3. DRAWING NOT TO SCALE
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
(1.35 – 1.75)
.008 – .012
(0.203 – 0.305)
TYP
.004 – .0098
(0.102 – 0.249)
.0250
(0.635)
BSC
.229 – .244
(5.817 – 6.198)
16
15
12
.189 – .196*
(4.801 – 4.978)
14
12 11 10
13
5
4
3
678
9
.150 – .157**
(3.810 – 3.988)
.009
(0.229)
REF
.045 ±.005
.254 MIN
RECOMMENDED SOLDER PAD LAYOUT
.150 – .165
.0250 BSC.0165 ± .0015
GN16 (SSOP) 0204
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.
600345fc
19
LT6003/LT6004/LT6005
TYPICAL APPLICATION
Gain of –50 Ultralow Power Precision Gas Sensor Amplifi er
20k
976k*
+
V
S
–
CITY TECHNOLOGY
MODEL 40X(2)
OXYGEN SENSOR
BURNS 100µA IN AIR
100
OXYGEN SENSOR
S1, S2 ARE NORMALLY CLOSED (N = LOW). S3 IS NORMALLY OPEN (N = LOW). A1's OUTPUT OFFSET IS STORED ON C1.
WHEN A READING IS DESIRED, SWITCHES REVERSE STATE, AND A2 ACTS AS A DIFFERENCE AMPLIFIER FROM THE STORED
OFFSET. NULL PHASE SHOULD BE ASSERTED 200ms OR MORE. A2 SETTLES 50ms AFTER READ PHASE IS ASSERTED, WITH
WORST CASE ROOM TEMPERATURE DROOP RATE IS 0.8µV/ms DOMINATED BY ANALOG SWITCH LEAKAGE CURRENT.