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LT6001/LT6002 Dual and Quad, 1.8V, 13A Precision Rail-to-Rail Op Amps
FEATURES
DESCRIPTIO

Ideal for Battery-Powered Applications - Low Voltage: 1.8V Operation - Low Current: 16A/Amplifier Max - Small Packages: DFN, MSOP, SSOP - Shutdown to 1.5A Max (LT6001DD) Low Offset Voltage: 500V Max Rail-to-Rail Input and Output Fully Specified on 1.8V and 5V Supplies Operating Temperature Range: -40C to 85C Available in 10-Lead and 16-Lead DFN, 8-Lead MSOP and 16-Lead SSOP Packages
APPLICATIO S

The LT(R)6001/LT6002 are dual and quad precision rail-torail input and output operational amplifiers. Designed to maximize battery life in always-on applications, the devices will operate on supplies down to 1.8V while drawing only 13A quiescient current. The low supply current and low voltage operation is combined with precision specifications; input offset is guaranteed less than 500V. The performance on 1.8V supplies is fully specified and guaranteed over temperature. A shutdown feature in the 10lead dual version can be used to extend battery life by allowing the amplifiers to be switched off during periods of inactivity. The LT6001 is available in the 8-Pin MSOP package; a 10-lead version with the shutdown feature is available in a tiny, dual fine pitch leadless package (DFN). The quad LT6002 is available in the 16-pin SSOP package and the 16-pin DFN package. These devices are specified over the commercial and industrial temperature range.
, LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Gas Sensing Portable Instrumentation Battery- or Solar-Powered Systems Low Voltage Signal Processing Micropower Active Filters
TYPICAL APPLICATIO
OXYGEN SENSOR CITY TECHNOLOGY 40X(2)
Micropower Oxygen Sensor
25
Start-Up Characteristics Supply Current vs Supply Voltage
SUPPLY CURRENT PER AMPLIFIER (A)
AV = 1 VCM = 0.5V 20 TA = 125C
10k
+VE www.citytech.com VS
200k
20k
+
-
VS
1/2 LT6001
60012 TA01a
+
-
-VE
100
330
1/2 LT6001
+
15 TA = 25C TA = -55C
VOUT = 1V IN AIR, 0V WITHOUT OXYGEN 330
10
-
5
VS = 1.8V ISUPPLY = 145A IN AIR, 45A WITHOUT OXYGEN
0 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 TOTAL SUPPLY VOLTAGE (V) 2.0
U
60012 TA01b
U
U
60012f
1
LT6001/LT6002
ABSOLUTE
AXI U RATI GS (Note 1)
Junction Temperature (DFN Packages) ................ 125C Storage Temperature Range .................. -65C to 150C Storage Temperature Range DFN Packages ................................... -65C to 125C Lead Temperature (Soldering, 10 sec) MSOP, SSOP Packages .................................... 300C
Total Supply Voltage (V+ to V-) .............................. 18V Input Current ..................................................... 10mA SHDN Pin Voltage (Note 7) ............................... V- to V+ Output Short Current Duration (Note 2) ......... Indefinite Operating Temperature Range (Note 3) ... -40C to 85C Specified Temperature Range (Note 4) .... -40C to 85C Junction Temperature ........................................... 150C
PACKAGE/ORDER I FOR ATIO
TOP VIEW OUT A IN- A IN+ A V- 1 2 3 4
- + - +
8 7 6 5
V+ OUT B IN- B IN+ B
MS8 PACKAGE 8-LEAD PLASTIC MSOP
TJMAX = 150C, JA = 250C/W
ORDER PART NUMBER LT6001CMS8 LT6001IMS8
TOP VIEW OUT A IN- A IN+ A V+ IN+ B IN- B OUT B NC 1 2 3 4 5 6 7 8 + -B - +A
MS8 PART MARKING*
LTBVD LTBVD
16 OUT D
- - 15 IN D D+ 14 IN+ D
13 V -
+ + 12 IN C C- 11 IN- C
10 OUT C 9 NC
GN PACKAGE 16-LEAD NARROW PLASTIC SSOP
TJMAX = 150C, JA = 135C/W
ORDER PART NUMBER LT6002CGN LT6002IGN
GN PART MARKING 6002 6002I
Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/
*Temperature grades are identified on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges.
60012f
2
U
U
W
WW
U
W
TOP VIEW OUT A 1 IN- A 2 IN+ A 3 V- 4 NC 5 10 V+ 9 OUT B 8 IN- B 7 IN+ B 6 SHDN
DD PACKAGE 10-LEAD (3mm 3mm) PLASTIC DFN
TJMAX = 125C, JA = 160C/W (NOTE 2) UNDERSIDE METAL CONNECTED TO V-
ORDER PART NUMBER LT6001CDD LT6001IDD
DD PART MARKING*
LBVH LBVH
TOP VIEW
OUT A IN- A IN+ A V+ IN B IN- B OUT B NC
+
1 2 3 4 5 6 7 8 B C A D
16 OUT D 15 IN- D 14 IN+ D 13 V - 12 IN+ C 11 IN- C 10 OUT C 9 NC
DHC PACKAGE 16-LEAD (5mm 3mm) DFN
TJMAX = 125C, JA = 160C/W (NOTE 2) UNDERSIDE METAL CONNECTED TO V-
ORDER PART NUMBER LT6002CDHC LT6002IDHC
DHC PART MARKING* 6002 6002
LT6001/LT6002
The denotes specifications which apply over the full specified temperature range, otherwise specifications are TA = 25C. VS = 1.8V, 0V, VCM = VOUT = 0.5V, for the LT6001DD, VSHDN = V+, unless otherwise noted.
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS LT6001MS8, LT6002GN 0C TA 70C -40C TA 85C LT6001DD, LT6002DHC 0C TA 70C -40C TA 85C VCM = V- to V+ LT6001MS8, LT6002GN

ELECTRICAL CHARACTERISTICS
MIN
TYP 200
MAX 500 700 850 650 850 1000 1000 1300 1200 1500 5
UNITS V V V V V V V V V V V/C nA nA nA nA nA nA VP-P nV/Hz fA/Hz G M pF dB dB dB
250

400
VCM = V- to V+ LT6001DD, LT6002DHC
500

VOS/T IB
Input Offset Voltage Drift (Note 5) Input Bias Current
VCM = 0.5V VCM = 0.5V VCM = V- VCM = V+ VCM = 0.5V VCM = V- VCM = V+ 0.1Hz to 10Hz f = 1kHz f = 1kHz Common Mode (VCM = 0V to 0.6V) Differential VCM = 0V to 0.6V, 0C TA 70C VCM = 0.1V to 0.6V, -40C TA 85C VCM = 0V to 1.8V VS = 1.8V to 6V VCM = VO = 0.5V VCM = VO = 0.5V
2 -5 -5 -2 -2 4 0.2 0.2 0.4 1.2 75 25 10 3.5 25 5 96 96 78
10 1 1 2
IOS
Input Offset Current
Input Noise Voltage en in RIN CIN CMRR Input Voltage Noise Density Input Current Noise Density Input Resistance Input Capacitance Common Mode Rejection Ratio

82 82 62 0 80 1.8
Input Voltage Range PSRR Power Supply Rejection Ratio Minimum Supply
1.8 90
V dB V
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LT6001/LT6002
The denotes specifications which apply over the full specified temperature range, otherwise specifications are TA = 25C. VS = 1.8V, 0V, VCM = VOUT = 0.5V, for the LT6001DD, VSHDN = V+, unless otherwise noted.
SYMBOL AVOL PARAMETER Large-Signal Gain CONDITIONS VO = 0.25V to 1.25V RL = 100k to GND RL = 100k to GND RL = 10k to GND RL = 10k to GND Input Overdrive = 30mV No Load ISINK = 100A Input Overdrive = 30mV No Load ISOURCE = 100A RL = 10k to GND Short to GND 0C TA 70C -40C TA 85C Short to V+ 0C TA 70C -40C TA 85C IS Supply Current per Amplifier 0C TA 70C -40C TA 85C Total Supply Current in Shutdown (Note 7) ISHDN SHDN Pin Current (Note 7) Shutdown Output Leakage Current (Note 7) VL VH tON tOFF GBW SHDN Pin Input Low Voltage (Note 7) SHDN Pin Input High Voltage (Note 7) Turn On Time (Note 7) Turn Off Time (Note 7) Gain Bandwidth Product (Note 8) VSHDN = 0V to 1.8V, RL = 10k VSHDN = 1.8V to 0V, RL = 10k Freq = 1kHz 0C TA 70C -40C TA 85C AV = -1, VOUT = 0.25V to 1.5V Measure 0.5V to 1.25V, 0C TA 70C -40C TA 85C VOUT = 1.25VP-P

ELECTRICAL CHARACTERISTICS
MIN 25 20 40 25
TYP 65 125
MAX
UNITS V/mV V/mV V/mV V/mV

VOL
Output Swing Low (Note 6)
30 120 30 140 160 2 1 0.4 0.7 0.4 0.15 4
60 200 60 225 250
mV mV mV mV mV mA mA mA mA mA mA
VOH
Output Swing High (Note 6)
ISC
Short-Circuit Current
2
13
16 22 24 1.5 20
A A A A nA nA nA V V s s kHz kHz kHz V/ms V/ms V/ms kHz
VSHDN = 0.3V VSHDN = 1.8V VSHDN = 0V VSHDN = 0.3V (V- VOUT V+)
0.8 -300 0 -200 20
0.3 1.5V 400 100 32 28 24 9 7 5 2.3 50
SR
Slew Rate
15
FPBW
Full Power Bandwidth (Note 9)
3.8
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LT6001/LT6002
The denotes specifications which apply over the full specified temperature range, otherwise specifications are TA = 25C. VS = 5V, 0V, VCM = VOUT = 1/2 Supply, for the LT6001DD, VSHDN = V+, unless otherwise noted.
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS LT6001MS8, LT6002GN 0C TA 70C -40C TA 85C LT6001DD, LT6002DHC 0C TA 70C -40C TA 85C VCM = V- to V+ LT6001MS8, LT6002GN

ELECTRICAL CHARACTERISTICS
MIN
TYP 200
MAX 500 700 850 650 850 1000 1000 1300 1200 1500 5
UNITS V V V V V V V V V V V/C nA nA nA nA nA nA VP-P nV/Hz fA/Hz G M pF dB dB dB
250

400
VCM = V- to V+ LT6001DD, LT6002DHC
500

VOS/T IB
Input Offset Voltage Drift (Note 5) Input Bias Current
VCM = VS/2 VCM = VS/2 VCM = V- VCM = V+ VCM = VS/2 VCM = V- VCM = V+ 0.1Hz to 10Hz f = 1kHz f = 1kHz Common Mode (VCM = 0V to 3.8V) Differential VCM = 0V to 3.8V, 0C TA 70C VCM = 0.1V to 3.8V, -40C TA 85C VCM = 0V to 5V VS = 1.8V to 6V VCM = VO = 0.5V VO = 0.5V to 4.5V RL = 100k to VS/2 RL = 100k to VS/2 RL = 10k to VS/2 RL = 10k to VS/2 RL = 10k to GND RL = 10k to GND
2 -6 -6 -2 -2 4 0.2 0.2 0.4 1.2 75 25 3.5 25 5 105 105 86
12 1.2 1.2 2.4
IOS
Input Offset Current
Input Noise Voltage en in RIN CIN CMRR Input Voltage Noise Density Input Current Noise Density Input Resistance Input Capacitance Common Mode Rejection Ratio

8.5 90 90 70 0 80 1.8 30 25 16 10 160 80
Input Voltage Range PSRR Power Supply Rejection Ratio Minimum Supply AVOL Large-Signal Gain
5 90
V dB V
60 25 1000

V/mV V/mV V/mV V/mV V/mV V/mV
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LT6001/LT6002
The denotes specifications which apply over the full specified temperature range, otherwise specifications are TA = 25C. VS = 5V, 0V, VCM = VOUT = 1/2 Supply, for the LT6001DD, VSHDN = V+, unless otherwise noted.
SYMBOL VOL PARAMETER Output Swing Low (Note 6) CONDITIONS Input Overdrive = 30mV No Load ISINK = 100A ISINK = 500A Input Overdrive = 30mV No Load ISOURCE = 100A RL = 10k to GND Short to GND 0C TA 70C -40C TA 85C Short to V+ 0C TA 70C -40C TA 85C IS Supply Current per Amplifier 0C TA 70C -40C TA 85C VSHDN = 0.3V VSHDN = 5V VSHDN = 0V VSHDN = 0.3V (V- VOUT V+)

ELECTRICAL CHARACTERISTICS
MIN
TYP 30 120 180 30 140 160
MAX 60 200 300 60 225 400
UNITS mV mV mV mV mV mV mA mA mA mA mA mA
VOH
Output Swing High (Note 6)
ISC
Short-Circuit Current
5 4 3 3.5 2.5 1.5
10
7.5
15
18 24 27 5 20
A A A A nA nA nA V V s s kHz kHz kHz V/ms V/ms V/ms kHz
Total Supply Current in Shutdown (Note 7) ISHDN SHDN Pin Current (Note 7) Shutdown Output Leakage Current (Note 7) VL VH tON tOFF GBW SHDN Pin Input Low Voltage (Note 7) SHDN Pin Input High Voltage (Note 7) Turn On Time (Note 7) Turn Off Time (Note 7) Gain Bandwidth Product
3 -1000 0 -650 20
0.3 4.7 400 100 40 35 30 11 8 6 0.87 60
VSHDN = 0V to 5V, RL = 10k VSHDN = 5V to 0V, RL = 10k Freq = 1kHz 0C TA 70C -40C TA 85C AV = -1, VOUT = 0.5V to 4.5V Measure 1V to 4V, 0C TA 70C -40C TA 85C VOUT = 4VP-P

SR
Slew Rate
18
FPBW
Full Power Bandwidth (Note 9)
1.4
Note 1: Absolute maximum ratings are those values beyond which the life of the device may be impaired. Note 2: A heat sink may be required to keep the junction temperature below the absolute maximum. This depends on the power supply voltage and how many amplifiers are shorted. The JA specified for the DD and 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 LT6001C/LT6001I and LT6002C/LT6002I are guaranteed functional over the temperature range of -40C to 85C. Note 4: The LT6001C/LT6002C is guaranteed to meet specified performance from 0C to 70C. The LT6001C/LT6002C are designed, characterized and expected to meet specified performance from -40C to 85C but are not tested or QA sampled at these temperatures. The LT6001I/ LT6002I is guaranteed to meet specified performance from -40C to 85C.
Note 5: This parameter is not 100% tested. Note 6: Output voltage swings are measured between the output and power supply rails. Note 7: Specifications apply to the LT6001DD with shutdown. Note 8: Guaranteed by correlation to slew rate at VS = 1.8V and GBW at VS = 5V. Note 9: Full-power bandwidth is calculated from the slew rate: FPBW = SR/(2VP).
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LT6001/LT6002 TYPICAL PERFOR A CE CHARACTERISTICS
VOS Distribution
30 25 VS = 5V, 0V VCM = 2.5V MS8 PACKAGE
PERCENT OF UNITS (%)
PERCENT OF UNITS (%)
SUPPLY CURRENT (A)
20 15 10 5 0 -500
-300 -100 100 300 INPUT OFFSET VOLTAGE (V)
Change in Input Offset Voltage vs Total Supply Voltage
300
CHANGE IN OFFSET VOLTAGE (V)
VCM = 0.5V
250
OFFSET VOTLAGE (V)
200 100 0 -100 -200 -300
TA = 125C TA = 25C
OFFSET VOLTAGE (V)
200 150 100 50 0 -50 -100 1 2 1.5 2.5 TOTAL SUPPLY VOLTAGE (V) 3
60012 G35
TA = 25C TA = 125C
TA = -55C
Input Bias Current vs Common Mode Voltage
12.5 10.0
OUTPUT HIGH SATURATION VOLTAGE (V)
7.5 TA = 125C 5.0 2.5 0 -2.5 -5.0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 COMMON MODE VOLTAGE (V)
60012 G07
TA = 25C TA = 125C 0.1 TA = -55C
OUTPUT LOW SATURATION VOLTAGE (V)
VS = 5V, 0V
INPUT BIAS CURRENT (nA)
TA = 25C TA = -55C
UW
500
60012 G01
TC VOS Distribution
20 VS = 5V, 0V 18 VCM = 2.5V MS8, GN16, 16 DD10 PACKAGES 14 -40C TO 85C 12 10 8 6 4 2 0 -5 -4 -3 -2 -1 0 1 2 3 DISTRIBUTION (V/C) 4
Supply Current vs Supply Voltage
30 25 TA = 125C 20 15 TA = 25C 10 TA = -55C 5 0
5
VCM = 0.5V
0
1
5 2 3 4 TOTAL SUPPLY VOLTAGE (V)
6
60012 G03
20012 G02
Input Offset Voltage vs Total Supply Voltage
400 300 VCM = 0.5V TYPICAL PART
400 300 200
Input Offset Voltage vs Input Common Mode Voltage
VS = 5V, 0V TYPICAL PART
TA = 125C 100 TA = 25C 0 TA = -55C
TA = -55C
-100 -200
0
1
4 3 5 2 TOTAL SUPPLY VOLTAGE (V)
6
60012 G05
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 INPUT COMMON MODE VOLTAGE (V)
5
60012 G06
Output Saturation Voltage vs Load Current (Output High)
1.0 VS = 5V, 0V INPUT OVERDRIVE = 30mV
Output Saturation Voltage vs Load Current (Output Low)
1.0 VS = 5V, 0V INPUT OVERDRIVE = 30mV
TA = 25C TA = 125C 0.1 TA = -55C
0.01 0.001
0.01 0.1 1 SOURCING LOAD CURRENT (mA)
10
60012 G08
0.01 0.001
0.01 0.1 1 SINKING LOAD CURRENT (mA)
10
60012 G08
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LT6001/LT6002 TYPICAL PERFOR A CE CHARACTERISTICS
Output Saturation Voltage vs Input Overdrive
100 OUTPUT SATURATION VOLTAGE (mV) 90 80 70 60 50 40 30 20 10 0 0 5 15 20 25 10 INPUT OVERDRIVE (mV) 30 OUTPUT HIGH OUTPUT LOW
OUTPUT SHORT-CIRCUIT CURRENT (mA)
12 10 8
TA = 25C TA = 125C TA = -55C
OUTPUT SHORT-CIRCIUT CURRENT (mA)
VS = 5V, 0V NO LOAD
0.1Hz to 10Hz Output Voltage Noise
VS = 2.5V
100
NOISE VOLTAGE (nV/Hz)
90 VCM = 4.5V 80 VCM = 2.5V
INPUT NOISE CURRENT DENSITY (fA/Hz)
NOISE VOLTAGE (500nV/DIV)
0
1
2
3
4567 TIME (SECONDS)
Open-Loop Gain
60
CHANGE IN INPUT OFFSET VOLTAGE (V)
CHANGE IN INPUT OFFSET VOLTAGE (V)
CHANGE IN INPUT OFFSET VOLTAGE (V)
40 20 0 -20 -40 -60
VS = 1.8V, 0V VCM = 0.5V TA = 25C
RL = 10k RL = 100k
0
0.3
0.6 0.9 1.2 OUTPUT VOLTAGE (V)
8
UW
60012 G10
Output Short-Circuit Current vs Total Supply Voltage (Sourcing)
14 VCM = 0.5V OUTPUT SHORTED TO V-
10
Output Short-Circuit Current vs Total Supply Voltage (Sinking)
VCM = 0.5V OUTPUT SHORTED TO V+
8 TA = 125C 6 TA = 25C 4 TA = -55C 2
6 4 2 0 1 4 TOTAL SUPPLY VOLTAGE (V) 2 3 5
60012 G11
0
1
3 2 4 TOTAL SUPPLY VOLTAGE (V)
5
60012 G12
Noise Voltage Density vs Frequency
VS = 5V, 0V TA = 25C
1000
Input Noise Current vs Frequency
VS = 5V, 0V TA = 25C
100
VCM = 4.5V
70
VCM = 2.5V
60
8
9
10
50 1 10 100 FREQUENCY (Hz) 1000
60012 G14
10 1 10 100 FREQUENCY (Hz) 1000
60012 G15
60012 G13
Open-Loop Gain
40 200 VS = 5V, 0V VCM = 2.5V TA = 25C 150 100 50 0 -50 -100 -150
Open-Loop Gain
VS = 2.5V TA = 25C RL = 10k
20
0
RL = 10k RL = 100k
RL = 100k
-20
1.5
1.8
-40
0
1
3 4 2 OUTPUT VOLTAGE (V)
5
60012 G17
- 200 -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 OUTPUT VOLTAGE (V)
2
2.5
60012 G16
20012 G18
60012f
LT6001/LT6002 TYPICAL PERFOR A CE CHARACTERISTICS
Gain Bandwidth and Phase Margin vs Temperature
f = 1kHz PHASE VS = 1.8V, 0V VCM = 0.5V VS = 5V, 0V VCM = 2.5V
GAIN BANDWIDTH (kHz)
SLEW RATE (V/ms)
GAIN (dB)
80 VS = 5V, 0V 70 VCM = 2.5V 60 50 VS = 1.8V, 0V 40 VCM = 0.5V 30 GAIN BANDWIDTH 20 10 75 100 0 50 -50 -25 25 TEMPERATURE (C)
Capacitive Load Handling Overshoot vs Capacitive Load
COMMON MODE REJECTION RATIO (dB)
90 80 70 60 50 40 30 0.1
COMMON MODE REJECTION RATIO (dB)
50 VS = 5V, 0V 45 VCM = 2.5V 40
OVERSHOOT (%)
35 30 25 20 15 10 5 0 10 100 1000 CAPACITIVE LOAD (pF) 10000
60012 G23
AV = 1 AV = 2
AV = 5
Output Impedance vs Frequency
10000 VS = 2.5V TA = 25C
OUTPUT IMPEDANCE (k)
1000
OUTPUT IMPEDANCE ()
100
10
1
0.1 0.01
0.1
UW
80 75 70 65 60 55 50 45 125
60012 G21
Slew Rate vs Temperature
35 30 25 20 15 10 5 -50 -25
Gain and Phase vs Frequency
70 120 PHASE VCM = 2.5V VCM = 4.5V VCM = 2.5V VCM = 4.5V 100 80 60 60 50 40 30 20 10 0 -10 -20 GAIN VS = 5V, 0V RF = RG = 100k AV = -1 1 10 100 FREQUENCY (kHz)
PHASE MARGIN (DEG)
AV = -1 RF = RG = 100k RISING VS = 5V, 0V RISING VS = 1.8V, 0V FALLING VS = 1.8V, 0V FALLING VS = 5V, 0V
PHASE (DEG)
40 20 0 -20 -40 -60 -80 1000
60012 G19
50 25 75 0 TEMPERATURE (C)
100
125
-30 0.1
60012 G22
Common Mode Rejection Ratio vs Frequency
100 VS = 2.5V TA = 25C
110 90 70 50 30
Power Supply Rejection Ratio vs Frequency
VS = 2.5V TA = 25C
POSITIVE SUPPLY
NEGATIVE SUPPLY
10 -10 0.01
1 10 FREQUENCY (kHz)
100
60012 G24
0.1
1 10 FREQUENCY (kHz)
100
60012 G25
Disabled Output Impedance vs Frequency (LT6001DD)
1000 VS = 2.5V VPIN6(SHDN) = -2.5V
100
AV = 10
AV = 1
10
1
1 10 FREQUENCY (kHz)
100
60012 G26
0 0.01
0.1
1 10 FREQUENCY (kHz)
100
60012 G27
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LT6001/LT6002 TYPICAL PERFOR A CE CHARACTERISTICS
Large-Signal Response
4.5V
1.5V 20mV/DIV
0.5V
AV = 1 VS = 5V, 0V CL = 100pF RL = 10k
100s/DIV
Supply Current vs SHDN Pin Voltage (LT6001DD)
25 SUPPLY CURRENT PER AMPLIFIER (A)
SUPPLY CURRENT PER AMPLIFIER (A)
VS = 1.8V, 0V TA = 125C
20
15 TA = 25C 10 TA = -55C
5
0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 SHDN PIN VOLTAGE (V)
60012 G31
Supply Current vs SHDN Pin Voltage (LT6001DD)
30
SUPPLY CURRENT PER AMPLIFIER (A)
VS = 5V TA = 125C
25 20
15 TA = -55C 10 5 0 -5 -4 -3 -2 -1 0 1 2 3 SHDN PIN VOLTAGE (V) 4 5
10
UW
60012 G28
Large-Signal Response
Small-Signal Response
0.25V
AV = 1 VS = 1.8V, 0V CL = 100pF RL = 10k
100s/DIV
60012 G29
AV = 1 VS = 2.5V CL = 100pF RL = 100k
10s/DIV
60012 G30
Supply Current vs SHDN Pin Voltage (LT6001DD)
30 25 TA = 125C 20 15 10 5 0 -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 SHDN PIN VOLTAGE (V) TA = 25C TA = -55C VS = 2.5V
2
2.5
60012 G34
Shutdown Response (LT6001DD)
VSHDN
TA = 25C
0V
VOUT 0V AV = 1 VS = 1.8V, 0V RL = 100k 500s/DIV
60012 G33
60012 G32
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LT6001/LT6002
SI PLIFIED SCHE ATIC
V+ R4 Q16 Q17 Q1 Q2 R5 Q14
R8 Q10 Q7 IN+ R2 30k Q11
SHDN
R1
Q18 Q19
Q20 Q8 R6
APPLICATIO S I FOR ATIO
Supply Voltage
The positive supply of the LT6001/LT6002 should be bypassed with a small capacitor (about 0.01F) within an inch of the pin. When driving heavy loads, an additional 4.7F electrolytic capacitor should be used. When using split supplies, the same is true for the negative supply pin. Rail-to-Rail Characteristics The LT6001/LT6002 are fully functional for an input signal range from the negative supply to the positive supply. Figure 1 shows a simplified schematic of the amplifier. The input stage consists of two differential amplifiers, 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, VCM, between the negative supply to approximately 1V below the positive supply. As VCM moves closer towards 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
U
W
W
UU
W
CM
Q3
Q4
Q5
Q6
C1
COMPLEMENTARY DRIVE GENERATOR
OUT
IN-
R3 D3 30k
Q12
Q13
Q9 R7
Q15
V-
Figure 1
the rest of the input common mode 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 amplifier. The complementary drive generator supplies current to the output transistors that swing from rail to rail. Input The input bias current depends on which stage is active. The input bias current polarity depends on the input common mode voltage. When the PNP stage is active, the input bias currents flow out of the input pins. They flow in the opposite direction when the NPN stage is active. The offset error due to the input bias currents can be minimized by equalizing the noninverting and inverting source impedance.
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LT6001/LT6002
APPLICATIO S I FOR ATIO
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 500V max in the PNP stage. By trimming the input offset voltage of both input stages, the input offset voltage over the entire common mode range (CMRR) is typically 400V, maintaining the precision characteristics of the amplifier. The input stage of the LT6001/LT6002 incorporates phase reversal protection to prevent wrong polarity outputs from occurring when the inputs are driven up to 2V beyond the rails. 30k protective resistors are included in the input leads so that current does not become excessive when the inputs are forced beyond the supplies or when a large differential signal is applied. Output The output of the LT6001/LT6002 can swing to within 30mV of the positive rail with no load and within 30mV of the negative rail with no load. When monitoring input voltages within 30mV of the positive rail or within 30mV of the negative rail, gain should be taken to keep the output from clipping. The LT6001/LT6002 can typically source 10mA on a single 5V supply, sourcing current is reduced to 4mA on a single 1.8V supply as noted in the electrical characteristics. The normally reverse-biased substrate diode from the output to V- will cause unlimited currents to flow when the output is forced below V-. If the current is transient and limited to 100mA, no damage will occur. The LT6001/LT6002 are optimized for low voltage operation but will remain functional up to 18V total supply voltage. On a total supply voltage greater than 6V, the output may exhibit small amplitude, high frequency oscillations when sourcing more than 500A into a load
VS 30mV VS
SUPPLY CURRENT PER AMPLIFIER (A)
+ -
Output High
30mV
Figure 2. Circuits for Start-Up Characteristics
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impedance greater than 20k. Adding a 470pF capacitor in series with a 150 resistor between the output and ground will stabilize the output. Start-Up and Output Saturation Characteristics Micropower op amps are often not micropower during start-up characteristics 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. Also, when the output saturates, the part may draw excessive current and pull down the supplies, compromising rail-to-rail performance. Figure 1 shows the start-up characteristics of the LT6001 for three limiting cases. The circuits are shown in Figure 2. 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.
20 18 16 14 12 10 8 6 4 2 0 0 0.5 1 1.5 2 2.5 3 3.5 4 SUPPLY VOLTAGE (V) 4.5 5 OUTPUT HIGH OUTPUT AT VS/2 OUTPUT LOW
60012 F01
W
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Figure 1. Start-Up Characteristics
VS VS/2
+ -
Output Low
+ -
60012 F02
Output at VS/2
LT6001/LT6002
APPLICATIO S I FOR ATIO
The LT6001 can swing to a respectable 30mV within each rail and draw virtually no excessive supply current. Figure 3 compares the LT6001 to a competitive part. Both op amps are in unity gain and their outputs are driven into each rail. The supply current is shown when the op amps are in linear operation and when they are driven into each rail. As can be seen from Figure 3, the supply current of the competitive part increases 3-fold or 5-fold depending on which rail the output goes to whereas the LT6001 draws virtually no excessive current.
VS = 2.5V, AV = 1 COMPETITIVE PART VIN 70 60 50 40 30 20 10
+ -
4 3 2 1 0 -1 -2 -3 -3
LT6100
SUPPLY CURRENT
VOUT (V)
VOUT
-2
-1
0 TIME (s)
1
2
3
60012 F03
Figure 3. VCC and ICC vs Input Current
TYPICAL APPLICATIO
Gain of 100 Amplifier (400kHz GBW on 30A Supply)
0.9V (NiMH) VIN 3
1 2
5
+
7 OUT
GAIN (dB)
+ -
8
-0.9V (NiMH) 90.9k 10k
6
-
90.9k
60012 TA02a
10k
U
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 curve of Open-Loop Gain for various loads shows the details. Shutdown The 10-lead LT6001 includes a shutdown feature that disables the part reducing quiescent current and makes the output high impedance. The LT6001 can be shut down by bringing the SHDN pin within 0.3V of V-, disabling both op-amps. The LT6001 is guaranteed to shut down if the SHDN pin is brought within 0.3V of V-. The exact switchover point will be a function of the supply voltage. See the Typical Performance Characteristics curves Supply Current vs Shutdown Pin Voltage. When shut down the total supply current is about 0.8A (both amplifiers) and the output leakage current is 20nA (V- VOUT V+). For normal operation the SHDN pin should be tied to V+. It can be left floating, however, parasitic leakage currents over 1A at the SHDN pin may inadvertently place the part into shutdown.
Gain vs Frequency
60 50 40 30 20 10 0 -10 -20 -30 -40 100 1k 10k 100k FREQUENCY (Hz) 1M
60012 TA02b
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ICC (A)
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LT6001/LT6002
PACKAGE DESCRIPTIO U
MS8 Package 8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.889 0.127 (.035 .005) 3.20 - 3.45 (.126 - .136)
5.23 (.206) MIN
0.42 0.038 (.0165 .0015) TYP
0.65 (.0256) BSC
3.00 0.102 (.118 .004) (NOTE 3)
8
7 65
0.52 (.0205) REF
RECOMMENDED SOLDER PAD LAYOUT DETAIL "A" 0 - 6 TYP
4.90 0.152 (.193 .006)
0.254 (.010) GAUGE PLANE
3.00 0.102 (.118 .004) (NOTE 4)
0.53 0.152 (.021 .006) DETAIL "A" 0.18 (.007) SEATING PLANE
1
23
4
1.10 (.043) MAX
0.86 (.034) REF
0.22 - 0.38 (.009 - .015) TYP
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
0.65 (.0256) BSC
0.127 0.076 (.005 .003)
MSOP (MS8) 0204
DD Package 10-Lead (3mm x 3mm) Plastic DFN
(Reference LTC DWG # 05-08-1699)
R = 0.115 TYP 6 0.675 0.05 0.38 0.10 10
3.50 0.05 1.65 0.05 2.15 0.05 (2 SIDES) PACKAGE OUTLINE 0.25 0.05 0.50 BSC 2.38 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS PIN 1 TOP MARK (SEE NOTE 6)
3.00 0.10 (4 SIDES)
1.65 0.10 (2 SIDES)
(DD10) DFN 1103
5 0.200 REF 0.75 0.05 2.38 0.10 (2 SIDES)
1
0.25 0.05 0.50 BSC
0.00 - 0.05
BOTTOM VIEW--EXPOSED PAD 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
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LT6001/LT6002
PACKAGE DESCRIPTIO U
GN Package 16-Lead Narrow Plastic SSOP
(Reference LTC DWG # 05-08-1641)
.045 .005
.189 - .196* (4.801 - 4.978) 16 15 14 13 12 11 10 9
.009 (0.229) REF
.254 MIN
.150 - .165
.229 - .244 (5.817 - 6.198)
.0165 .0015
.150 - .157** (3.810 - 3.988)
.0250 BSC
RECOMMENDED SOLDER PAD LAYOUT
1 .015 .004 x 45 (0.38 0.10) .007 - .0098 (0.178 - 0.249) .016 - .050 (0.406 - 1.270)
NOTE: 1. CONTROLLING DIMENSION: INCHES INCHES 2. DIMENSIONS ARE IN (MILLIMETERS) 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 .0532 - .0688 (1.35 - 1.75)
23
4
56
7
8
.004 - .0098 (0.102 - 0.249)
0 - 8 TYP
.008 - .012 (0.203 - 0.305) TYP
.0250 (0.635) BSC
GN16 (SSOP) 0204
DHC Package 16-Lead (5mm x 5mm) Plastic DFN
(Reference LTC DWG # 05-08-1706)
5.00 0.10 (2 SIDES) 0.65 0.05 3.50 0.05 R = 0.20 TYP 3.00 0.10 1.65 0.10 (2 SIDES) (2 SIDES) PIN 1 NOTCH
(DHC16) DFN 1103
R = 0.115 TYP 9 16
0.40 0.10
1.65 0.05 2.20 0.05 (2 SIDES)
PACKAGE OUTLINE
PIN 1 TOP MARK (SEE NOTE 6) 8 0.200 REF 0.75 0.05 4.40 0.10 (2 SIDES) BOTTOM VIEW--EXPOSED PAD 1 0.25 0.05 0.50 BSC
0.25 0.05 0.50 BSC 4.40 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
0.00 - 0.05
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 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
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LT6001/LT6002
TYPICAL APPLICATIO
2M
VIN
FREQUENCY OUT 7.5Hz/mV * VIN LINEARITY 5%, VIN 20mV TO 800mV ISUPPLY 60A TO 100A
RELATED PARTS
PART NUMBER LT2178/LT2179 LT1490A/LT1491A LT1494/LT1495/LT1496 LT1672/LT1673/LT1674 LT1782 DESCRIPTION 17A Dual/Quad Single Supply Op Amps 50A Dual/Quad Over-The-Top(R) Rail-to-Rail Input and Output Op Amps 1.5A Max Single/Dual/Quad Over-The-Top Precision Rail-to-Rail Input and Output Op Amps 2A Max, AV 5, Single/Dual/Quad Over-The-Top Precision Rail-to-Rail Input and Output Op Amps Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and Output Op Amps COMMENTS 120V VOS(MAX), Gain Bandwidth = 60kHz 950V VOS(MAX), Gain Bandwidth = 200kHz 375V VOS(MAX), Gain Bandwidth = 2.7kHz Gain of 5 Stable, Gain Bandwidth = 12kHz SOT-23, 800V VOS(MAX), IS = 55A(MAX), Gain Bandwidth = 200kHz, Shutdown Pin
Over-The-Top is a registered trademark of Linear Technology Corporation.
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507
-
6
A1 1/2 LT6001 4
+
5
+
1M
3
A2 1/2 LT6001
1
TP0610
1M VREF 8
42.2k VREF 1000pF DIODES: CENTRAL SEMI CMOD3003 x4
7 0.1F
2N7002 VS 4.3V TO 20V 0.1F 42.2k
4 LT1790-4.096
www.linear.com
-
-
1M
2
0.1F
+
U
Low Power V-to-F Converter
VREF VREF 2M 42.2k 1M 3 2M VREF 7
(R)
LTC 1440 5 2 1 6
8
VOUT
6 1F
60012 TA03
VREF
1
2
60012f LT/LT 1105 * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 2005

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