FEATURES
■
Maximum Offset Voltage of 3μV
■
Maximum Offset Voltage Drift of 30nV/°C
■
Small Footprint, Low Profile MS8/GN16 Packages
■
Single Supply Operation: 2.7V to ±5.5V
■
Noise: 1.5μV
■
Voltage Gain: 140dB (Typ)
■
PSRR: 130dB (Typ)
■
CMRR: 130dB (Typ)
■
Supply Current: 0.75mA (Typ) per Amplifier
■
Extended Common Mode Input Range
■
Output Swings Rail-to-Rail
■
Operating Temperature Range –40°C to 125°C
■
Available in 3mm × 3mm × 0.8mm DFN Package
(0.01Hz to 10Hz Typ)
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APPLICATIO S
■
Thermocouple Amplifiers
■
Electronic Scales
■
Medical Instrumentation
■
Strain Gauge Amplifiers
■
High Resolution Data Acquisition
■
DC Accurate RC Active Filters
■
Low Side Current Sense
LTC2051/LTC2052
Dual/Quad Zero-Drift
Operational Amplifiers
U
DESCRIPTIO
The LTC®2051/LTC2052 are dual/quad zero-drift operational amplifiers available in the MS8 and SO-8/GN16 and
S14 packages. For space limited applications, the LTC2051
is available in a 3mm × 3mm × 0.8mm dual fine pitch
leadless package (DFN). They operate from a single 2.7V
supply and support ±5V applications. The current consumption is 750μA per op amp.
The LTC2051/LTC2052, despite their miniature size, feature uncompromising DC performance. The typical input
offset voltage and offset drift are 0.5μV and 10nV/°C. The
almost zero DC offset and drift are supported with a power
supply rejection ratio (PSRR) and common mode rejection ratio (CMRR) of more than 130dB.
The input common mode voltage ranges from the negative
supply up to typically 1V from the positive supply. The
LTC2051/LTC2052 also have an enhanced output stage
capable of driving loads as low as 2kΩ to both supply rails.
The open-loop gain is typically 140dB. The LTC2051/
LTC2052 also feature a 1.5μV
3MHz gain-bandwidth product.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
DC to 10Hz noise and a
P-P
U
TYPICAL APPLICATIO
High Performance Low Cost Instrumentation Amplifier
R2
10k
0.1%
R1
100Ω
0.1%
5V
2
3
–V
IN
8
–
1/2
LTC2051HV
+
R1
100Ω
0.1%
1
V
IN
6
–
LTC2051HV
5
+
10k
0.1%
1/2
–5V
Input Referred Noise 0.1Hz to 10Hz
2
R2
1
0
μV
4
7
AV = 101
20512 TA01
–1
–2
0246810
TIME (SEC)
2052 TA02
20512fd
1
LTC2051/LTC2052
WWWU
ABSOLUTE AXI U RATI GS
(Note 1)
Total Supply Voltage (V+ to V–)
LTC2051/LTC2052 .................................................. 7V
LTC2051HV/LTC2052HV ....................................... 12V
Input Voltage (Note 5) ..........(V+ + 0.3V) to (V– – 0.3V)
Output Short-Circuit Duration......................... Indefinite
UU
W
PACKAGE/ORDER I FOR ATIO
TOP VIEW
+
1OUT A
–IN A
2
+IN A
3
–
V
4
8-LEAD (3mm × 3mm) PLASTIC DFN
T
EXPOSED PAD (PIN 9) IS CONNECTED TO V
JMAX
9
DD PACKAGE
= 125°C, θJA = 160°C/W
ORDER PART
NUMBER*
8
V
OUT B
7
–IN B
6
+IN B
5
–
(PIN 4)
DD PART
MARKING
OUT A
1
–IN A
2
+IN A
3
–
V
4
MS8 PACKAGE
8-LEAD PLASTIC MSOP
= 125°C, θJA = 250°C/W
JMAX
ORDER PART
NUMBER
Operating Temperature Range............. –40°C to 125°C
Specified Temperature Range (Note 3) –40°C to 125°C
Storage Temperature Range................ –65°C to 150°C
DD Package ...................................... –65°C to 125°C
Lead Temperature (Soldering, 10 sec)................. 300°C
TOP VIEW
+
8
V
OUT B
7
–IN B
6
+IN B
5
MS8 PART
MARKING
OUT A
–IN A
+IN A
V
SHDN A
ORDER PART
NUMBER
TOP VIEW
1
2
3
–
4
5
MS10 PACKAGE
10-LEAD PLASTIC MSOP
T
= 125°C, θJA = 250°C/WT
JMAX
10
9
8
7
6
MS10 PART
MARKING
+
V
OUT B
–IN B
+IN B
SHDN B
LTC2051CDD
LTC2051IDD
LTC2051HVCDD
LTC2051HVIDD
LAAN
LAEL
LTC2051CMS8
LTC2051IMS8
LTC2051HVCMS8
LTC2051HVIMS8
LTC2051HMS8
LTC2051HVHMS8
TOP VIEW
OUT A
1
–IN A
2
+IN A
3
–
V
4
S8 PACKAGE
8-LEAD PLASTIC SO
T
= 125°C, θJA = 190°C/W
JMAX
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/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
+
V
8
OUT B
7
–IN B
6
+IN B
5
LTMN
LTMP
LTPJ
LTPK
LTC2051CMS10
LTC2051IMS10
LTC2051HVCMS10
LTC2051HVIMS10
LTVF
LTVH
ORDER PART
NUMBER
LTC2051CS8
LTC2051IS8
LTC2051HVCS8
LTC2051HVIS8
LTC2051HS8
LTC2051HVHS8
LTMQ
LTMR
LTRB
LTRC
S8 PART
MARKING
2051
2051I
2051HV
051HVI
2051H
051HVH
2
20512fd
LTC2051/LTC2052
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUT A
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
OUT D
–IN D
+IN D
V
–
+IN C
–IN C
OUT C
UU
W
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
LTC2052CGN
LTC2052IGN
LTC2052HVCGN
LTC2052HVIGN
LTC2052HGN
LTC2052HVHGN
GN PART MARKING
2052
2052I
2052HV
1
OUT A
2
–IN A
3
+IN A
+
4
V
5
+IN B
6
–IN B
7
OUT B
8
NC
16-LEAD PLASTIC SSOP
T
= 125°C, θJA = 110°C/W
JMAX
TOP VIEW
GN PACKAGE
OUT D
16
–IN D
15
+IN D
14
–
V
13
+IN C
12
–IN C
11
OUT C
10
NC
9
052HVI
2052H
052HVH
U
AVAILABLE OPTIO S
T
= 125°C, θJA = 110°C/W
JMAX
ORDER PART
NUMBER
LTC2052CS
LTC2052IS
LTC2052HVCS
LTC2052HVIS
LTC2052HS
LTC2052HVHS
PART NUMBER AMPS/PACKAGE SPECIFIED TEMP RANGE SPECIFIED VOLTAGE PACKAGE
LTC2051CDD 2 0°C to 70°C3V, 5V DD
LTC2051CS8 2 0°C to 70°C 3V, 5V SO-8
LTC2051CMS8 2 0°C to 70°C 3V, 5V 8-Lead MSOP
LTC2051CMS10 2 0°C to 70°C 3V, 5V 10-Lead MSOP
LTC2051HVCDD 2 0°C to 70°C 3V, 5V, ±5V DD
LTC2051HVCS8 2 0°C to 70°C 3V, 5V, ±5V SO-8
LTC2051HVCMS8 2 0°C to 70°C 3V, 5V, ±5V 8-Lead MSOP
LTC2051HVCMS10 2 0°C to 70°C 3V, 5V, ±5V 10-Lead MSOP
LTC2051IDD 2 –40°C to 85°C3V, 5V DD
LTC2051IS8 2 –40°C to 85°C 3V, 5V SO-8
LTC2051IMS8 2 –40°C to 85°C 3V, 5V 8-Lead MSOP
LTC2051IMS10 2 –40°C to 85°C 3V, 5V 10-Lead MSOP
LTC2051HVIDD 2 –40°C to 85°C 3V, 5V, ±5V DD
LTC2051HVIS8 2 –40°C to 85°C 3V, 5V, ±5V SO-8
LTC2051HVIMS8 2 –40°C to 85°C 3V, 5V, ±5V 8-Lead MSOP
LTC2051HVIMS10 2 –40°C to 85°C 3V, 5V, ±5V 10-Lead MSOP
LTC2051HS8 2 –40°C to 125°C 3V, 5V SO-8
LTC2051HMS8 2 –40°C to 125°C 3V, 5V 8-Lead MSOP
LTC2051HVHS8 2 –40°C to 125°C 3V, 5V, ±5V SO-8
LTC2051HVHMS8 2 –40°C to 125°C 3V, 5V, ±5V 8-Lead MSOP
LTC2052CS 4 0°C to 70°C 3V, 5V 14-Lead SO
LTC2052CGN 4 0°C to 70°C 3V, 5V 16-Lead SSOP
LTC2052HVCS 4 0°C to 70°C 3V, 5V, ±5V 14-Lead SO
LTC2052HVCGN 4 0°C to 70°C 3V, 5V, ±5V 16-Lead SSOP
20512fd
3
LTC2051/LTC2052
U
AVAILABLE OPTIO S
PART NUMBER AMPS/PACKAGE SPECIFIED TEMP RANGE SPECIFIED VOLTAGE PACKAGE
LTC2052IS 4 –40°C to 85°C 3V, 5V 14-Lead SO
LTC2052IGN 4 –40°C to 85°C 3V, 5V 16-Lead SSOP
LTC2052HVIS 4 –40°C to 85°C 3V, 5V, ±5V 14-Lead SO
LTC2052HVIGN 4 –40°C to 85°C 3V, 5V, ±5V 16-Lead SSOP
LTC2052HS 4 –40°C to 125°C 3V, 5V 14-Lead SO
LTC2052HGN 4 –40°C to 125°C 3V, 5V 16-Lead SSOP
LTC2052HVHS 4 –40°C to 125°C 3V, 5V, ±5V 14-Lead SO
LTC2052HVHGN 4 –40°C to 125°C 3V, 5V, ±5V 16-Lead SSOP
ELECTRICAL CHARACTERISTICS
(LTC2051/LTC2052, LTC2051HV/LTC2052HV) The ● denotes the
specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VS = 3V, 5V
unless otherwise noted. (Note 3)
LTC2051C/LTC2052C
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Input Offset Voltage (Note 2) ±0.5 ±3 ±0.5 ±3 μV
Average Input Offset Drift (Note 2) ● 0.01 ±0.03 0.01 ±0.05 μV/°C
Long-Term Offset Drift 50 50 nV/√mo
Input Bias Current (Note 4) VS = 3V ±8 ±50 ±8 ±50 pA
Input Offset Current (Note 4) VS = 3V ±100 ±100 pA
Input Noise Voltage RS = 100Ω, DC to 10Hz 1.5 1.5 μV
Common Mode Rejection Ratio VCM = GND to V+ – 1.3, 115 130 115 130 dB
Power Supply Rejection Ratio 120 130 120 130 dB
Large-Signal Voltage Gain RL = 10k, VS = 3V 120 140 120 140 dB
Output Voltage Swing High RL = 2k to GND ● V+ – 0.15 V+ – 0.06 V+ – 0.15 V+ – 0.06 V
Output Voltage Swing Low RL = 2k to GND ● 215 215 mV
Slew Rate 22V/μs
Gain Bandwidth Product 3 3 MHz
Supply Current (Per Amplifier) No Load, VS = 3V, V
Supply Current, Shutdown V
= 3V ● ±100 ±3000 pA
V
S
VS = 5V ±25 ±75 ±25 ±75 pA
VS = 5V ● ±150 ±3000 pA
= 3V ● ±150 ±700 pA
V
S
VS = 5V ±150 ±150 pA
= 5V ● ±200 ±700 pA
V
S
VS = 3V ● 110 130 110 130 dB
VCM = GND to V+ – 1.3, 120 130 120 130 dB
= 5V ● 115 130 115 130 dB
V
S
● 115 130 115 130 dB
● 115 140 115 140 dB
RL = 10k, VS = 5V 125 140 125 140 dB
RL = 10k to GND ● V+ – 0.05 V+ – 0.02 V+ – 0.05 V+ – 0.02 V
= 10k to GND ● 215 215 mV
R
L
= V
SHDN
No Load, VS = 5V, V
= VIL, VS = 3V ● 25 25 μA
SHDN
= VIL, VS = 5V ● 410 410 μA
V
SHDN
SHDN
= V
● 120 140 120 140 dB
● 0.75 1.0 0.75 1.1 mA
IH
● 0.85 1.2 0.85 1.3 mA
IH
LTC2051I/LTC2052I LTC2051H/LTC2052H
P-P
4
20512fd
LTC2051/LTC2052
ELECTRICAL CHARACTERISTICS
specifications which apply over the full operating temperature range, otherwise specifications are at T
(LTC2051/LTC2052, LTC2051HV/LTC2052HV) The ● denotes the
= 25°C. VS = 3V, 5V
A
unless otherwise noted. (Note 3)
LTC2051C/LTC2052C
LTC2051I/LTC2052I LTC2051H/LTC2052H
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Shutdown Pin Input Low Voltage (VIL) ● V– + 0.5 V– + 0.5 V
Shutdown Pin Input High Voltage (V
Shutdown Pin Input Current V
Internal Sampling Frequency 7.5 7.5 kHz
) ● V+ – 0.5 V+ – 0.5 V
IH
= VIL, VS = 3V ● –1 –3 –1 –3 μA
SHDN
= VIL, VS = 5V ● –2 –5 –2 –5 μA
V
SHDN
(LTC2051HV/LTC2052HV) The ● denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Input Offset Voltage (Note 2) ±1 ±3 ±1 ±3 μV
Average Input Offset Drift (Note 2) ● 0.01 ±0.03 0.01 ±0.05 μV/°C
Long-Term Offset Drift 50 50 nV/√mo
Input Bias Current (Note 4) ±90 ±150 ±90 ±150 pA
Input Offset Current (Note 4) ±300 ±300 pA
Input Noise Voltage RS = 100Ω, DC to 10Hz 1.5 1.5 μV
Common Mode Rejection Ratio VCM = V– to V+ – 1.3 125 130 125 130 dB
Power Supply Rejection Ratio 120 130 120 130 dB
Large-Signal Voltage Gain RL = 10k 125 140 125 140 dB
Maximum Output Voltage Swing RL = 2k to GND ● ±4.75 ±4.92 ±4.50 ±4.92 V
Slew Rate 22V/μs
Gain Bandwidth Product 3 3 MHz
Supply Current (Per Amplifier) No Load, V
Supply Current, Shutdown V
Shutdown Pin Input Low Voltage (VIL) ● V– + 0.5 V– + 0.5 V
Shutdown Pin Input High Voltage (VIH) ● V+ – 0.5 V+ – 0.5 V
Shutdown Pin Input Current V
Internal Sampling Frequency 7.5 7.5 kHz
= 25°C. VS = ±5V unless otherwise noted. (Note 3)
A
● ±300 ±3000 pA
● ±500 ±700 pA
● 120 130 120 130 dB
● 115 130 115 130 dB
● 120 140 120 140 dB
= 10k to GND ● ±4.90 ±4.98 ±4.85 ±4.98 V
R
L
SHDN
SHDN
= V
= V
SHDN
IL
IL
= V
IH
● 1 1.5 1 1.5 mA
● 15 30 15 30 μA
● –7 –15 –7 –15 μA
LTC2051C/LTC2052C
LTC2051I/LTC2052I LTC2051H/LTC2052H
P-P
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: These parameters are guaranteed by design. Thermocouple effects
preclude measurements of these voltage levels during automated testing.
Note 3: All versions of the LTC2051/LTC2052 are designed, characterized
and expected to meet the extended temperature limits of –40°C and 125°C.
The LTC2051C/LTC2052C/LTC2051HVC/LTC2052HVC are guaranteed to
meet the temperature limits of 0°C and 70°C. The LTC2051I/LTC2052I/
LTC2051HVI/LTC2052HVI are guaranteed to meet temperature limits of –
40°C and 85°C. The LTC2051H/LTC2051HVH and LTC2052H/LTC2052HVH
are guaranteed to meet the temperature limits of –40°C and 125°C.
Note 4: The bias current measurement accuracy depends on the proximity of
the negative supply bypass capacitors to the device under test. Because of
this, only the bias current of channel B (LTC2051) and channels A and B
(LTC2052) are 100% tested to the data sheet specifications. The bias
currents of the remaining channels are 100% tested to relaxed limits,
however, their values are guaranteed by design to meet the data sheet limits.
Note 5: This parameter is guaranteed to meet specified performance
through design and characterization. It has not been tested.
Note 6: The θ
spreading metal. Using expanded metal area on all layers of a board
reduces this value.
specified for the DD package is with minimal PCB heat
JA
20512fd
5
LTC2051/LTC2052
UW
TYPICAL PERFOR A CE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
140
120
100
80
60
CMRR (dB)
40
20
0
1 100 1k 100k
10 10k
FREQUENCY (Hz)
VS = 3V OR ±5V
= 0.5V
V
CM
Output Voltage Swing
vs Load Resistance
6
RL TO GND
5
4
3
2
OUTPUT SWING (V)
1
0
0
246
LOAD RESISTANCE (kΩ)
= 5V
V
S
= 3V
V
S
DC CMRR
vs Common Mode Input Range PSRR vs Frequency
120
100
–PSRR
80
60
PSRR (dB)
40
20
0
10 1k 10k 1M
+PSRR
100
FREQUENCY (Hz)
100k
20512 G03
P-P
20512 G01
140
120
100
80
60
CMRR (dB)
40
20
0
0
VS = 10V
VS = 3V
24 10
VS = 5V
68
VCM (V)
20512 G02
Output Swing
Output Swing vs Output Current
6
5
4
3
2
OUTPUT VOLTAGE (V)
1
0
10
8
20512 G04
0.01
VS = 5V
VS = 3V
0.1 1 10
OUTPUT CURRENT (mA)
20512 G05
vs Load Resistance ±5V
5
4
RL TO GND
3
2
1
0
–1
–2
OUTPUT VOLTAGE (V)
–3
–4
–5
2
0
LOAD RESISTANCE (kΩ)
6
8
4
10
20512 G06
Output Swing
vs Output Current, ±5V Supply
5
4
R
TO GND
L
3
2
1
0
–1
OUTPUT SWING (V)
–2
–3
–4
–5
0.01
0.1
OUTPUT CURRENT (mA)
6
Gain/Phase vs Frequency
100
80
60
40
20
GAIN (dB)
0
VS = 3V OR ±5V
–20
= 50pF
C
L
= 100k
R
L
1
20512 G07
–40
10
1k 1M
100 10k 100k 10M
FREQUENCY (Hz)
PHASE
GAIN
20512 G08
80
100
PHASE (DEG)
120
140
160
180
200
Bias Current vs Temperature
10k
1k
100
BIAS CURRENT (pA)
10
1
–50 50 100 125
VS = ±5V
VS = 5V
VS = 3V
0
TEMPERATURE (°C)
20512 G09
20512fd
UW
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current
vs Input Common Mode Voltage
250
200
Transient Response
LTC2051/LTC2052
Input Overload Recovery
0
–0.1
INPUT (V)
150
100
INPUT BIAS CURRENT (pA)
50
0
–3
–5
–1 0
INPUT COMMON MODE VOLTAGE (V)
SAMPLING FREQUENCY (kHz)
VS = ±5V
= 5V
V
S
V
= 3V
S
1
3
20512 G10
Sampling Frequency
vs Supply Voltage
10
9
8
7
6
5
3
5
SUPPLY VOLTAGE (V)
2V/DIV
AV = 1
= 10k
R
L
C
= 100pF
L
= ±5V
V
5
S
1μs/DIV
20512 G11
1.5
OUTPUT (V)
0
AV = –100
R
L
C
L
V
S
= 100k
= 10pF
= 3V
500μs/DIV
2050 G12
Sampling Frequency
vs Temperature
10
9
8
7
SAMPLING FREQUENCY (kHz)
6
7
9
11
20512 G13
5
–50
VS = ±5V
V
= 3V
S
0
TEMPERATURE (°C)
50
100
20512 G14
125
Supply Current (Per Amplifier)
vs Supply Voltage
1.2
1.0
0.8
0.6
0.4
SUPPLY CURRENT (mA)
0.2
0
2.5
4.5 6.5 8.5 10.5
SUPPLY VOLTAGE (V)
20512 G15
Supply Current (Per Amplifier)
vs Temperature
1.2
1.0
0.8
0.6
0.4
SUPPLY CURRENT (mA)
0.2
0
–50
0
TEMPERATURE (°C)
50
VS = ±5V
VS = 5V
VS = 3V
100
20512 G16
125
20512fd
7
LTC2051/LTC2052
WUUU
APPLICATIO S I FOR ATIO
Shutdown
The LTC2051 includes a shutdown pin in the 10-lead
MSOP. When this active low pin is high or allowed to float,
the device operates normally. When the shutdown pin is
pulled low, the device enters shutdown mode; supply
current drops to 3μA, all clocking stops and the output
assumes a high impedance state.
Clock Feedthrough, Input Bias Current
The LTC2051/LTC2052 use autozeroing circuitry to achieve
an almost zero DC offset over temperature, common
mode voltage and power supply voltage. The frequency of
the clock used for autozeroing is typically 7.5kHz. The
term clock feedthrough is broadly used to indicate visibility of this clock frequency in the op amp output spectrum.
There are typically two types of clock feedthrough in
autozeroed op amps like the LTC2051/LTC2052.
The first form of clock feedthough is caused by the settling
of the internal sampling capacitor and is input referred;
that is, it is multiplied by the closed-loop gain of the op
amp. This form of clock feedthrough is independent of the
magnitude of the input source resistance or the magnitude
of the gain setting resistors. The LTC2051/LTC2052 have
a residue clock feedthrough of less than 1μV
referred at 7.5kHz.
RMS
input
To reduce this form of clock feedthrough, use smaller
valued gain setting resistors and minimize the source
resistance at the input. If the resistance seen at the inputs
is less than 10k, this form of clock feedthrough is less
than 1μV
amount of residue clock feedthrough from the first form
previously described.
Placing a capacitor across the feedback resistor reduces
either form of clock feedthrough by limiting the bandwidth
of the closed-loop gain.
Input bias current is defined as the DC current into the
input pins of the op amp. The same current spikes that
cause the second form of clock feedthrough
described
current of the op amp below 70°C.
At temperatures above 70°C, the leakage of the ESD
protection diodes on the inputs increase the input bias
currents of both inputs in the positive direction, while the
current caused by the charge injection stays relatively
constant. At elevated temperatures (above 85°C) the
leakage current begins to dominate and both the negative
and positive pin’s input bias currents are in the positive
direction (into the pins).
Input Pins, ESD Sensitivity
input referred at 7.5kHz, or less than the
RMS
previously
, when averaged, dominate the DC input bias
The second form of clock feedthrough is caused by the
small amount of charge injection occurring during the
sampling and holding of the op amps input offset voltage.
The current spikes are multiplied by the impedance seen
at the input terminals of the op amp, appearing at the
output multiplied by the closed-loop gain of the op amp.
U
TYPICAL APPLICATIO
The dual chopper op amp buffers the inputs of A1 and
corrects its offset voltage and offset voltage drift. With the
RC values shown, the power-up warm-up time is typically
20 seconds. The step response of the composite amplifier
does not present settling tails. The LT®1677 should be
used when extremely low noise, VOS and VOS drift are
8
ESD voltages above 700V on the input pins of the op amp
will cause the input bias currents to increase (more DC
current into the pins). At these voltages, it is possible to
damage the device to a point where the input bias current
exceeds the maximums specified in this data sheet.
needed and the input source resistance is low. (For instance a 350Ω strain gauge bridge.) The LT1012 or
equivalent should be used when low bias current (100pA)
is also required in conjunction with DC to 10Hz low noise,
low VOS and VOS drift. The measured typical input offset
voltages are less than 1μV.
20512fd
TYPICAL APPLICATIO
+
–
U
Obtaining Ultralow VOS Drift and Low Noise
5
2
–
1/2 LTC2051
3
+
1
5V
R2
R1
1
3
+
8
A1
2
–
+
1/2 LTC2051
R4
6
–
R5
R3
6
OUT
7
C1
C2
LTC2051/LTC2052
OUT
20512 F01
A1 R1 R2 R3 R4 R5 C1 C2 eIN (DC – 1Hz) eIN (DC – 10Hz)
LT1677 2.49k 3.01k 340k 10k 100k 0.01μF 0.001μF 0.15μV
LT1012 750Ω 57Ω 250k 10k 100k 0.01μF 0.001μF 0.3μV
P-P
P-P
U
PACKAGE DESCRIPTIO
DD Package
8-Lead Plastic DFN (3mm × 3mm)
(Reference LTC DWG # 05-08-1698)
R = 0.115
0.00 – 0.05
1.65 ± 0.10
(2 SIDES)
0.25 ± 0.05
BOTTOM VIEW—EXPOSED PAD
3.00 ±0.10
PIN 1
TOP MARK
(NOTE 6)
0.200 REF
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
5. EXPOSED PAD SHALL BE SOLDER PLATED
6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION
ON TOP AND BOTTOM OF PACKAGE
(4 SIDES)
0.75 ±0.05
TYP
2.38 ±0.10
(2 SIDES)
85
14
0.50 BSC
0.38 ± 0.10
3.5 ±0.05
0.675 ±0.05
1.65 ±0.05
(2 SIDES)2.15 ±0.05
PACKAGE
OUTLINE
0.25 ± 0.05
RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS
2.38 ±0.05
(2 SIDES)
0.50
BSC
(DD) DFN 1203
0.2μV
0.4μV
P-P
P-P
20512fd
9
LTC2051/LTC2052
U
PACKAGE DESCRIPTIO
(Reference LTC DWG # 05-08-1660)
DETAIL “A”
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
° – 6° TYP
0
DETAIL “A”
0.53 ± 0.152
(.021 ± .006)
SEATING
PLANE
(.043)
0.22 – 0.38
(.009 – .015)
TYP
1.10
MAX
0.65
(.0256)
BSC
MS8 Package
8-Lead Plastic MSOP
3.00 ± 0.102
(.118 ± .004)
0.86
(.034)
REF
0.127 ± 0.076
(.005 ± .003)
(NOTE 3)
4.90
± 0.152
(.193 ± .006)
8
7
12
0.52
(.0205)
6
5
REF
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
4
3
5.23
(.206)
MIN
0.42 ± 0.038
(.0165 ± .0015)
TYP
RECOMMENDED SOLDER PAD LAYOUT
0.889
(.035 ± .005)
3.20 – 3.45
(.126 – .136)
0.65
(.0256)
BSC
MSOP (MS8) 0204
± 0.127
MS Package
10-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1661)
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
SEATING
PLANE
4.90 ± 0.152
(.193 ± .006)
0.17 – 0.27
(.007 – .011)
TYP
1.10
(.043)
MAX
DETAIL “A”
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
0
DETAIL “A”
° – 6° TYP
0.53 ± 0.152
(.021 ± .006)
12
0.50
(.0197)
BSC
8910
7
6
45
3
0.497 ± 0.076
(.0196 ± .003)
REF
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
0.86
(.034)
REF
0.127 ± 0.076
(.005 ± .003)
5.23
(.206)
MIN
0.305 ± 0.038
(.0120 ± .0015)
TYP
0.889 ± 0.127
(.035 ± .005)
3.20 – 3.45
(.126 – .136)
0.50
(.0197)
RECOMMENDED SOLDER PAD LAYOUT
BSC
MSOP (MS) 0603
10
20512fd
U
PACKAGE DESCRIPTIO
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.010 – .020
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
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)
.007 – .0098
(0.178 – 0.249)
NOTE:
1. CONTROLLING DIMENSION: INCHES
2. DIMENSIONS ARE IN
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
× 45°
.016 – .050
(0.406 – 1.270)
INCHES
(MILLIMETERS)
.016 – .050
(0.406 – 1.270)
INCHES
(MILLIMETERS)
0°– 8° TYP
.015 ± .004
(0.38 ± 0.10)
0° – 8° TYP
.053 – .069
(1.346 – 1.752)
.014 – .019
(0.355 – 0.483)
TYP
× 45°
.008 – .012
(0.203 – 0.305)
TYP
.004 – .010
(0.101 – 0.254)
.050
(1.270)
BSC
GN Package
16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.0532 – .0688
(1.35 – 1.75)
(0.102 – 0.249)
.0250
(0.635)
BSC
.004 – .0098
.228 – .244
(5.791 – 6.197)
.229 – .244
(5.817 – 6.198)
(4.801 – 5.004)
8
1
16
12
.189 – .197
NOTE 3
7
2
.189 – .196*
(4.801 – 4.978)
15
14
3
LTC2051/LTC2052
5
6
3
13
4
12 11 10
5
678
4
9
.150 – .157
(3.810 – 3.988)
NOTE 3
.030 ±.005
.009
(0.229)
REF
.150 – .157**
(3.810 – 3.988)
.050 BSC
.245
MIN
TYP
RECOMMENDED SOLDER PAD LAYOUT
.254 MIN
RECOMMENDED SOLDER PAD LAYOUT
.045 ±.005
.160 ±.005
SO8 0303
.045 ±.005
.150 – .165
.0250 BSC.0165 ±.0015
GN16 (SSOP) 0204
14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.050 BSC
N
.245
MIN
123 N/2
.030 ±.005
TYP
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
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)
× 45°
.016 – .050
(0.406 – 1.270)
INCHES
(MILLIMETERS)
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.
.045 ±.005
.160 ±.005
(5.791 – 6.197)
0° – 8° TYP
S Package
.228 – .244
.053 – .069
(1.346 – 1.752)
.014 – .019
(0.355 – 0.483)
TYP
.337 – .344
(8.560 – 8.738)
13
14
N
1
NOTE 3
12
11
10
3
2
4
.050
(1.270)
BSC
5
8
9
.150 – .157
(3.810 – 3.988)
NOTE 3
N/2
7
6
.004 – .010
(0.101 – 0.254)
S14 0502
20512fd
11
LTC2051/LTC2052
TYPICAL APPLICATIO
U
Paralleling Amplifiers to Improve Noise
R2
R1
2
–
1/4 LTC2052
3
+
R
1
R
R2
R1
V
IN
V
OUT
V
IN
6
–
1/4 LTC2052
5
+
R2
R1
9
–
1/4 LTC2052
10
+
R2
= 3 ; INPUT DC – 10Hz NOISE ≅ 0.8μV
R1
R
7
R
8
P-P
=
5V
0.1μF
13
12
NOISE OF EACH PARALLEL OP AMP
4
–
1/4 LTC2052
+
11
–5V
14
0.1μF
√3
20512 F02
V
OUT
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC1051/LTC1053 Precision Zero-Drift Op Amp Dual/Quad
LTC1151 ±15V Zero-Drift Op Amp Dual High Voltage Operation ±18V
LTC1152 Rail-to-Rail Input and Output Zero-Drift Op Amp Single Zero-Drift Op Amp with Rail-to-Rail Input and Output and Shutdown
LTC2050 Zero-Drift Op Amp in SOT-23 Single Supply Operation 2.7V to ±5V, Shutdown
LTC2053 Zero-Drift Precision Instrumentation Amp MS8, 116dB CMRR, Two External Resistors Set Gain
LTC6800 Rail-to-Rail Input and Output Instrumentation Amp Low Cost, MS8, Two External Resistors Set Gain
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
www.linear.com
20512fd
LT 0108 REV D • PRINTED IN USA
© LINEAR TECHNOLOGY CORPOR ATION 2000
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